./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/weaver/popl20-nonblocking-cntr-alt.wvr.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 6c24879c 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-nonblocking-cntr-alt.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 dfec19cb420bdcc992ee0af7789c6701a360457d4b79eebd70c54f4e314fbf3f --- Real Ultimate output --- This is Ultimate 0.2.2-?-6c24879 [2022-07-12 10:38:04,514 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-07-12 10:38:04,516 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-07-12 10:38:04,543 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-07-12 10:38:04,544 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-07-12 10:38:04,545 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-07-12 10:38:04,549 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-07-12 10:38:04,557 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-07-12 10:38:04,558 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-07-12 10:38:04,562 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-07-12 10:38:04,563 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-07-12 10:38:04,564 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-07-12 10:38:04,565 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-07-12 10:38:04,566 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-07-12 10:38:04,568 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-07-12 10:38:04,569 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-07-12 10:38:04,570 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-07-12 10:38:04,571 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-07-12 10:38:04,574 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-07-12 10:38:04,577 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-07-12 10:38:04,578 INFO L181 SettingsManager]: Resetting HornVerifier preferences to default values [2022-07-12 10:38:04,579 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-07-12 10:38:04,580 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-07-12 10:38:04,581 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-07-12 10:38:04,582 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-07-12 10:38:04,585 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-07-12 10:38:04,585 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-07-12 10:38:04,585 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-07-12 10:38:04,586 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-07-12 10:38:04,587 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-07-12 10:38:04,587 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-07-12 10:38:04,588 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-07-12 10:38:04,589 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-07-12 10:38:04,589 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-07-12 10:38:04,590 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-07-12 10:38:04,590 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-07-12 10:38:04,590 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-07-12 10:38:04,591 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-07-12 10:38:04,591 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-07-12 10:38:04,591 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-07-12 10:38:04,592 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-07-12 10:38:04,593 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-07-12 10:38:04,594 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2022-07-12 10:38:04,626 INFO L113 SettingsManager]: Loading preferences was successful [2022-07-12 10:38:04,627 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-07-12 10:38:04,627 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-07-12 10:38:04,627 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-07-12 10:38:04,628 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-07-12 10:38:04,628 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-07-12 10:38:04,628 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-07-12 10:38:04,629 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-07-12 10:38:04,629 INFO L138 SettingsManager]: * Use SBE=true [2022-07-12 10:38:04,629 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-07-12 10:38:04,630 INFO L138 SettingsManager]: * sizeof long=4 [2022-07-12 10:38:04,630 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-07-12 10:38:04,630 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-07-12 10:38:04,630 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-07-12 10:38:04,630 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-07-12 10:38:04,630 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-07-12 10:38:04,630 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-07-12 10:38:04,631 INFO L138 SettingsManager]: * sizeof long double=12 [2022-07-12 10:38:04,631 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-07-12 10:38:04,632 INFO L138 SettingsManager]: * Use constant arrays=true [2022-07-12 10:38:04,632 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-07-12 10:38:04,632 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-07-12 10:38:04,632 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-07-12 10:38:04,632 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-07-12 10:38:04,641 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-07-12 10:38:04,641 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-07-12 10:38:04,642 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-07-12 10:38:04,642 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-07-12 10:38:04,642 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-07-12 10:38:04,642 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-07-12 10:38:04,642 INFO L138 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2022-07-12 10:38:04,642 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-07-12 10:38:04,643 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-07-12 10:38:04,643 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> dfec19cb420bdcc992ee0af7789c6701a360457d4b79eebd70c54f4e314fbf3f [2022-07-12 10:38:04,818 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-07-12 10:38:04,836 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-07-12 10:38:04,838 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-07-12 10:38:04,839 INFO L271 PluginConnector]: Initializing CDTParser... [2022-07-12 10:38:04,839 INFO L275 PluginConnector]: CDTParser initialized [2022-07-12 10:38:04,840 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/weaver/popl20-nonblocking-cntr-alt.wvr.c [2022-07-12 10:38:04,885 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/2d20de63c/50e6bb68974a425499eb167e5fed048c/FLAG1620d21f6 [2022-07-12 10:38:05,182 INFO L306 CDTParser]: Found 1 translation units. [2022-07-12 10:38:05,183 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/weaver/popl20-nonblocking-cntr-alt.wvr.c [2022-07-12 10:38:05,187 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/2d20de63c/50e6bb68974a425499eb167e5fed048c/FLAG1620d21f6 [2022-07-12 10:38:05,616 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/2d20de63c/50e6bb68974a425499eb167e5fed048c [2022-07-12 10:38:05,618 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-07-12 10:38:05,619 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-07-12 10:38:05,620 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-07-12 10:38:05,620 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-07-12 10:38:05,622 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-07-12 10:38:05,622 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 12.07 10:38:05" (1/1) ... [2022-07-12 10:38:05,623 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@77d3da45 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.07 10:38:05, skipping insertion in model container [2022-07-12 10:38:05,623 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 12.07 10:38:05" (1/1) ... [2022-07-12 10:38:05,627 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-07-12 10:38:05,636 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-07-12 10:38:05,754 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-nonblocking-cntr-alt.wvr.c[2098,2111] [2022-07-12 10:38:05,756 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-07-12 10:38:05,760 INFO L203 MainTranslator]: Completed pre-run [2022-07-12 10:38:05,771 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-nonblocking-cntr-alt.wvr.c[2098,2111] [2022-07-12 10:38:05,771 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-07-12 10:38:05,780 INFO L208 MainTranslator]: Completed translation [2022-07-12 10:38:05,781 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.07 10:38:05 WrapperNode [2022-07-12 10:38:05,781 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-07-12 10:38:05,783 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-07-12 10:38:05,783 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-07-12 10:38:05,783 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-07-12 10:38:05,788 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.07 10:38:05" (1/1) ... [2022-07-12 10:38:05,793 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.07 10:38:05" (1/1) ... [2022-07-12 10:38:05,804 INFO L137 Inliner]: procedures = 21, calls = 24, calls flagged for inlining = 4, calls inlined = 4, statements flattened = 57 [2022-07-12 10:38:05,805 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-07-12 10:38:05,805 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-07-12 10:38:05,806 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-07-12 10:38:05,806 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-07-12 10:38:05,810 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.07 10:38:05" (1/1) ... [2022-07-12 10:38:05,811 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.07 10:38:05" (1/1) ... [2022-07-12 10:38:05,812 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.07 10:38:05" (1/1) ... [2022-07-12 10:38:05,812 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.07 10:38:05" (1/1) ... [2022-07-12 10:38:05,815 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.07 10:38:05" (1/1) ... [2022-07-12 10:38:05,817 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.07 10:38:05" (1/1) ... [2022-07-12 10:38:05,818 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.07 10:38:05" (1/1) ... [2022-07-12 10:38:05,820 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-07-12 10:38:05,820 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-07-12 10:38:05,820 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-07-12 10:38:05,821 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-07-12 10:38:05,821 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.07 10:38:05" (1/1) ... [2022-07-12 10:38:05,831 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-07-12 10:38:05,840 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-12 10:38:05,849 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) [2022-07-12 10:38:05,870 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 [2022-07-12 10:38:05,881 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-07-12 10:38:05,882 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2022-07-12 10:38:05,882 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2022-07-12 10:38:05,882 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2022-07-12 10:38:05,882 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2022-07-12 10:38:05,882 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-07-12 10:38:05,882 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-07-12 10:38:05,883 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-07-12 10:38:05,884 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2022-07-12 10:38:05,884 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2022-07-12 10:38:05,884 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-07-12 10:38:05,884 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-07-12 10:38:05,884 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-07-12 10:38:05,885 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-07-12 10:38:05,886 WARN L208 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2022-07-12 10:38:05,936 INFO L234 CfgBuilder]: Building ICFG [2022-07-12 10:38:05,937 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-07-12 10:38:06,042 INFO L275 CfgBuilder]: Performing block encoding [2022-07-12 10:38:06,072 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-07-12 10:38:06,073 INFO L299 CfgBuilder]: Removed 2 assume(true) statements. [2022-07-12 10:38:06,074 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 12.07 10:38:06 BoogieIcfgContainer [2022-07-12 10:38:06,074 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-07-12 10:38:06,075 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-07-12 10:38:06,076 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-07-12 10:38:06,078 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-07-12 10:38:06,078 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 12.07 10:38:05" (1/3) ... [2022-07-12 10:38:06,078 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2dffe9e7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 12.07 10:38:06, skipping insertion in model container [2022-07-12 10:38:06,079 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.07 10:38:05" (2/3) ... [2022-07-12 10:38:06,079 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2dffe9e7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 12.07 10:38:06, skipping insertion in model container [2022-07-12 10:38:06,079 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 12.07 10:38:06" (3/3) ... [2022-07-12 10:38:06,080 INFO L111 eAbstractionObserver]: Analyzing ICFG popl20-nonblocking-cntr-alt.wvr.c [2022-07-12 10:38:06,083 WARN L143 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2022-07-12 10:38:06,089 INFO L201 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-07-12 10:38:06,089 INFO L160 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-07-12 10:38:06,089 INFO L509 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2022-07-12 10:38:06,134 INFO L135 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2022-07-12 10:38:06,156 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 87 places, 86 transitions, 188 flow [2022-07-12 10:38:06,209 INFO L129 PetriNetUnfolder]: 6/84 cut-off events. [2022-07-12 10:38:06,212 INFO L130 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2022-07-12 10:38:06,214 INFO L84 FinitePrefix]: Finished finitePrefix Result has 93 conditions, 84 events. 6/84 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 3. Compared 43 event pairs, 0 based on Foata normal form. 0/77 useless extension candidates. Maximal degree in co-relation 52. Up to 2 conditions per place. [2022-07-12 10:38:06,216 INFO L82 GeneralOperation]: Start removeDead. Operand has 87 places, 86 transitions, 188 flow [2022-07-12 10:38:06,219 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 76 places, 75 transitions, 162 flow [2022-07-12 10:38:06,226 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-07-12 10:38:06,230 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@730af640, mLbeIndependenceSettings=de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings@7df78e6a [2022-07-12 10:38:06,231 INFO L358 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2022-07-12 10:38:06,245 INFO L129 PetriNetUnfolder]: 6/74 cut-off events. [2022-07-12 10:38:06,245 INFO L130 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2022-07-12 10:38:06,246 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-12 10:38:06,246 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] [2022-07-12 10:38:06,247 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-12 10:38:06,250 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 10:38:06,250 INFO L85 PathProgramCache]: Analyzing trace with hash -1565492451, now seen corresponding path program 1 times [2022-07-12 10:38:06,256 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 10:38:06,256 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [46945620] [2022-07-12 10:38:06,256 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 10:38:06,257 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 10:38:06,360 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 10:38:06,403 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 10:38:06,404 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 10:38:06,404 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [46945620] [2022-07-12 10:38:06,405 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [46945620] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-12 10:38:06,405 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-12 10:38:06,405 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-07-12 10:38:06,406 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [743996028] [2022-07-12 10:38:06,407 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-12 10:38:06,412 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2022-07-12 10:38:06,413 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 10:38:06,435 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2022-07-12 10:38:06,436 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-07-12 10:38:06,438 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 75 out of 86 [2022-07-12 10:38:06,441 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 76 places, 75 transitions, 162 flow. Second operand has 2 states, 2 states have (on average 78.0) internal successors, (156), 2 states have internal predecessors, (156), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:38:06,441 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-12 10:38:06,442 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 75 of 86 [2022-07-12 10:38:06,442 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-12 10:38:06,469 INFO L129 PetriNetUnfolder]: 10/97 cut-off events. [2022-07-12 10:38:06,470 INFO L130 PetriNetUnfolder]: For 18/19 co-relation queries the response was YES. [2022-07-12 10:38:06,470 INFO L84 FinitePrefix]: Finished finitePrefix Result has 129 conditions, 97 events. 10/97 cut-off events. For 18/19 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 106 event pairs, 1 based on Foata normal form. 11/98 useless extension candidates. Maximal degree in co-relation 55. Up to 18 conditions per place. [2022-07-12 10:38:06,471 INFO L132 encePairwiseOnDemand]: 82/86 looper letters, 6 selfloop transitions, 0 changer transitions 2/71 dead transitions. [2022-07-12 10:38:06,472 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 77 places, 71 transitions, 166 flow [2022-07-12 10:38:06,473 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2022-07-12 10:38:06,478 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2 states. [2022-07-12 10:38:06,482 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2 states to 2 states and 160 transitions. [2022-07-12 10:38:06,484 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.9302325581395349 [2022-07-12 10:38:06,485 INFO L72 ComplementDD]: Start complementDD. Operand 2 states and 160 transitions. [2022-07-12 10:38:06,485 INFO L73 IsDeterministic]: Start isDeterministic. Operand 2 states and 160 transitions. [2022-07-12 10:38:06,486 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-12 10:38:06,488 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 2 states and 160 transitions. [2022-07-12 10:38:06,490 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 3 states, 2 states have (on average 80.0) internal successors, (160), 2 states have internal predecessors, (160), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:38:06,497 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 3 states, 3 states have (on average 86.0) internal successors, (258), 3 states have internal predecessors, (258), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:38:06,497 INFO L81 ComplementDD]: Finished complementDD. Result has 3 states, 3 states have (on average 86.0) internal successors, (258), 3 states have internal predecessors, (258), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:38:06,499 INFO L186 Difference]: Start difference. First operand has 76 places, 75 transitions, 162 flow. Second operand 2 states and 160 transitions. [2022-07-12 10:38:06,499 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 77 places, 71 transitions, 166 flow [2022-07-12 10:38:06,501 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 73 places, 71 transitions, 158 flow, removed 0 selfloop flow, removed 4 redundant places. [2022-07-12 10:38:06,503 INFO L242 Difference]: Finished difference. Result has 73 places, 69 transitions, 142 flow [2022-07-12 10:38:06,504 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=86, PETRI_DIFFERENCE_MINUEND_FLOW=146, PETRI_DIFFERENCE_MINUEND_PLACES=72, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=71, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=71, PETRI_DIFFERENCE_SUBTRAHEND_STATES=2, PETRI_FLOW=142, PETRI_PLACES=73, PETRI_TRANSITIONS=69} [2022-07-12 10:38:06,507 INFO L279 CegarLoopForPetriNet]: 76 programPoint places, -3 predicate places. [2022-07-12 10:38:06,507 INFO L495 AbstractCegarLoop]: Abstraction has has 73 places, 69 transitions, 142 flow [2022-07-12 10:38:06,507 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 78.0) internal successors, (156), 2 states have internal predecessors, (156), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:38:06,507 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-12 10:38:06,507 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] [2022-07-12 10:38:06,508 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-07-12 10:38:06,508 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-12 10:38:06,508 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 10:38:06,509 INFO L85 PathProgramCache]: Analyzing trace with hash -707015589, now seen corresponding path program 1 times [2022-07-12 10:38:06,509 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 10:38:06,509 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [867133737] [2022-07-12 10:38:06,509 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 10:38:06,509 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 10:38:06,551 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 10:38:06,722 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 10:38:06,723 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 10:38:06,723 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [867133737] [2022-07-12 10:38:06,723 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [867133737] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-12 10:38:06,723 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-12 10:38:06,723 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-07-12 10:38:06,724 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [165289474] [2022-07-12 10:38:06,724 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-12 10:38:06,725 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-07-12 10:38:06,725 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 10:38:06,725 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-07-12 10:38:06,726 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=16, Unknown=0, NotChecked=0, Total=30 [2022-07-12 10:38:06,727 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 54 out of 86 [2022-07-12 10:38:06,727 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 73 places, 69 transitions, 142 flow. Second operand has 6 states, 6 states have (on average 57.166666666666664) internal successors, (343), 6 states have internal predecessors, (343), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:38:06,727 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-12 10:38:06,728 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 54 of 86 [2022-07-12 10:38:06,728 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-12 10:38:06,831 INFO L129 PetriNetUnfolder]: 62/188 cut-off events. [2022-07-12 10:38:06,832 INFO L130 PetriNetUnfolder]: For 5/5 co-relation queries the response was YES. [2022-07-12 10:38:06,832 INFO L84 FinitePrefix]: Finished finitePrefix Result has 329 conditions, 188 events. 62/188 cut-off events. For 5/5 co-relation queries the response was YES. Maximal size of possible extension queue 16. Compared 552 event pairs, 26 based on Foata normal form. 0/157 useless extension candidates. Maximal degree in co-relation 326. Up to 80 conditions per place. [2022-07-12 10:38:06,833 INFO L132 encePairwiseOnDemand]: 80/86 looper letters, 28 selfloop transitions, 5 changer transitions 0/77 dead transitions. [2022-07-12 10:38:06,834 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 76 places, 77 transitions, 225 flow [2022-07-12 10:38:06,836 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-07-12 10:38:06,836 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2022-07-12 10:38:06,837 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 358 transitions. [2022-07-12 10:38:06,838 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.6937984496124031 [2022-07-12 10:38:06,853 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 358 transitions. [2022-07-12 10:38:06,853 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 358 transitions. [2022-07-12 10:38:06,854 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-12 10:38:06,854 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 358 transitions. [2022-07-12 10:38:06,856 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 59.666666666666664) internal successors, (358), 6 states have internal predecessors, (358), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:38:06,857 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 86.0) internal successors, (602), 7 states have internal predecessors, (602), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:38:06,858 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 86.0) internal successors, (602), 7 states have internal predecessors, (602), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:38:06,858 INFO L186 Difference]: Start difference. First operand has 73 places, 69 transitions, 142 flow. Second operand 6 states and 358 transitions. [2022-07-12 10:38:06,858 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 76 places, 77 transitions, 225 flow [2022-07-12 10:38:06,859 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 76 places, 77 transitions, 225 flow, removed 0 selfloop flow, removed 0 redundant places. [2022-07-12 10:38:06,860 INFO L242 Difference]: Finished difference. Result has 77 places, 70 transitions, 160 flow [2022-07-12 10:38:06,860 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=86, PETRI_DIFFERENCE_MINUEND_FLOW=142, PETRI_DIFFERENCE_MINUEND_PLACES=71, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=69, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=64, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=160, PETRI_PLACES=77, PETRI_TRANSITIONS=70} [2022-07-12 10:38:06,861 INFO L279 CegarLoopForPetriNet]: 76 programPoint places, 1 predicate places. [2022-07-12 10:38:06,861 INFO L495 AbstractCegarLoop]: Abstraction has has 77 places, 70 transitions, 160 flow [2022-07-12 10:38:06,861 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 57.166666666666664) internal successors, (343), 6 states have internal predecessors, (343), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:38:06,862 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-12 10:38:06,862 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, 1, 1, 1, 1, 1] [2022-07-12 10:38:06,862 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-07-12 10:38:06,862 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-12 10:38:06,863 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 10:38:06,863 INFO L85 PathProgramCache]: Analyzing trace with hash 334905647, now seen corresponding path program 1 times [2022-07-12 10:38:06,863 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 10:38:06,863 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1843711047] [2022-07-12 10:38:06,863 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 10:38:06,863 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 10:38:06,889 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 10:38:06,987 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-12 10:38:06,988 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 10:38:06,988 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1843711047] [2022-07-12 10:38:06,988 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1843711047] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-12 10:38:06,988 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-12 10:38:06,988 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-07-12 10:38:06,989 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [376176107] [2022-07-12 10:38:06,989 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-12 10:38:06,989 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-07-12 10:38:06,989 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 10:38:06,990 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-07-12 10:38:06,990 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=16, Unknown=0, NotChecked=0, Total=30 [2022-07-12 10:38:06,991 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 56 out of 86 [2022-07-12 10:38:06,991 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 77 places, 70 transitions, 160 flow. Second operand has 6 states, 6 states have (on average 59.5) internal successors, (357), 6 states have internal predecessors, (357), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:38:06,991 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-12 10:38:06,991 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 56 of 86 [2022-07-12 10:38:06,992 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-12 10:38:07,053 INFO L129 PetriNetUnfolder]: 44/170 cut-off events. [2022-07-12 10:38:07,053 INFO L130 PetriNetUnfolder]: For 16/22 co-relation queries the response was YES. [2022-07-12 10:38:07,054 INFO L84 FinitePrefix]: Finished finitePrefix Result has 302 conditions, 170 events. 44/170 cut-off events. For 16/22 co-relation queries the response was YES. Maximal size of possible extension queue 15. Compared 526 event pairs, 23 based on Foata normal form. 6/164 useless extension candidates. Maximal degree in co-relation 297. Up to 70 conditions per place. [2022-07-12 10:38:07,055 INFO L132 encePairwiseOnDemand]: 80/86 looper letters, 24 selfloop transitions, 5 changer transitions 0/76 dead transitions. [2022-07-12 10:38:07,055 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 82 places, 76 transitions, 233 flow [2022-07-12 10:38:07,055 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-07-12 10:38:07,055 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2022-07-12 10:38:07,058 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 366 transitions. [2022-07-12 10:38:07,061 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.7093023255813954 [2022-07-12 10:38:07,062 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 366 transitions. [2022-07-12 10:38:07,062 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 366 transitions. [2022-07-12 10:38:07,063 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-12 10:38:07,063 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 366 transitions. [2022-07-12 10:38:07,064 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 61.0) internal successors, (366), 6 states have internal predecessors, (366), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:38:07,066 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 86.0) internal successors, (602), 7 states have internal predecessors, (602), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:38:07,068 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 86.0) internal successors, (602), 7 states have internal predecessors, (602), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:38:07,068 INFO L186 Difference]: Start difference. First operand has 77 places, 70 transitions, 160 flow. Second operand 6 states and 366 transitions. [2022-07-12 10:38:07,068 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 82 places, 76 transitions, 233 flow [2022-07-12 10:38:07,069 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 78 places, 76 transitions, 225 flow, removed 0 selfloop flow, removed 4 redundant places. [2022-07-12 10:38:07,071 INFO L242 Difference]: Finished difference. Result has 79 places, 71 transitions, 170 flow [2022-07-12 10:38:07,072 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=86, PETRI_DIFFERENCE_MINUEND_FLOW=152, PETRI_DIFFERENCE_MINUEND_PLACES=73, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=70, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=65, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=170, PETRI_PLACES=79, PETRI_TRANSITIONS=71} [2022-07-12 10:38:07,072 INFO L279 CegarLoopForPetriNet]: 76 programPoint places, 3 predicate places. [2022-07-12 10:38:07,073 INFO L495 AbstractCegarLoop]: Abstraction has has 79 places, 71 transitions, 170 flow [2022-07-12 10:38:07,074 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 59.5) internal successors, (357), 6 states have internal predecessors, (357), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:38:07,074 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-12 10:38:07,074 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, 1, 1, 1, 1, 1, 1, 1] [2022-07-12 10:38:07,074 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-07-12 10:38:07,074 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-12 10:38:07,075 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 10:38:07,075 INFO L85 PathProgramCache]: Analyzing trace with hash 1873075449, now seen corresponding path program 1 times [2022-07-12 10:38:07,075 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 10:38:07,076 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2064874741] [2022-07-12 10:38:07,076 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 10:38:07,076 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 10:38:07,102 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 10:38:07,345 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 10:38:07,345 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 10:38:07,345 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2064874741] [2022-07-12 10:38:07,346 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2064874741] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-12 10:38:07,346 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1371122496] [2022-07-12 10:38:07,346 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 10:38:07,347 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 10:38:07,347 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-12 10:38:07,352 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) [2022-07-12 10:38:07,356 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-07-12 10:38:07,426 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 10:38:07,428 INFO L263 TraceCheckSpWp]: Trace formula consists of 155 conjuncts, 20 conjunts are in the unsatisfiable core [2022-07-12 10:38:07,433 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-12 10:38:07,793 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 10:38:07,793 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-12 10:38:08,150 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 10:38:08,151 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1371122496] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-12 10:38:08,151 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-12 10:38:08,151 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15, 15] total 33 [2022-07-12 10:38:08,151 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1062128663] [2022-07-12 10:38:08,152 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-12 10:38:08,154 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2022-07-12 10:38:08,155 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 10:38:08,155 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2022-07-12 10:38:08,156 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=174, Invalid=882, Unknown=0, NotChecked=0, Total=1056 [2022-07-12 10:38:08,158 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 51 out of 86 [2022-07-12 10:38:08,161 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 79 places, 71 transitions, 170 flow. Second operand has 33 states, 33 states have (on average 52.84848484848485) internal successors, (1744), 33 states have internal predecessors, (1744), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:38:08,161 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-12 10:38:08,161 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 51 of 86 [2022-07-12 10:38:08,162 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-12 10:38:10,077 INFO L129 PetriNetUnfolder]: 258/823 cut-off events. [2022-07-12 10:38:10,077 INFO L130 PetriNetUnfolder]: For 216/216 co-relation queries the response was YES. [2022-07-12 10:38:10,079 INFO L84 FinitePrefix]: Finished finitePrefix Result has 1759 conditions, 823 events. 258/823 cut-off events. For 216/216 co-relation queries the response was YES. Maximal size of possible extension queue 57. Compared 4945 event pairs, 2 based on Foata normal form. 4/826 useless extension candidates. Maximal degree in co-relation 1753. Up to 155 conditions per place. [2022-07-12 10:38:10,082 INFO L132 encePairwiseOnDemand]: 71/86 looper letters, 134 selfloop transitions, 117 changer transitions 49/341 dead transitions. [2022-07-12 10:38:10,082 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 142 places, 341 transitions, 1630 flow [2022-07-12 10:38:10,082 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 64 states. [2022-07-12 10:38:10,082 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 64 states. [2022-07-12 10:38:10,087 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 3541 transitions. [2022-07-12 10:38:10,089 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.6433502906976745 [2022-07-12 10:38:10,089 INFO L72 ComplementDD]: Start complementDD. Operand 64 states and 3541 transitions. [2022-07-12 10:38:10,089 INFO L73 IsDeterministic]: Start isDeterministic. Operand 64 states and 3541 transitions. [2022-07-12 10:38:10,091 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-12 10:38:10,091 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 64 states and 3541 transitions. [2022-07-12 10:38:10,096 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 65 states, 64 states have (on average 55.328125) internal successors, (3541), 64 states have internal predecessors, (3541), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:38:10,103 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 65 states, 65 states have (on average 86.0) internal successors, (5590), 65 states have internal predecessors, (5590), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:38:10,104 INFO L81 ComplementDD]: Finished complementDD. Result has 65 states, 65 states have (on average 86.0) internal successors, (5590), 65 states have internal predecessors, (5590), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:38:10,104 INFO L186 Difference]: Start difference. First operand has 79 places, 71 transitions, 170 flow. Second operand 64 states and 3541 transitions. [2022-07-12 10:38:10,104 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 142 places, 341 transitions, 1630 flow [2022-07-12 10:38:10,107 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 138 places, 341 transitions, 1580 flow, removed 0 selfloop flow, removed 4 redundant places. [2022-07-12 10:38:10,110 INFO L242 Difference]: Finished difference. Result has 168 places, 202 transitions, 991 flow [2022-07-12 10:38:10,110 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=86, PETRI_DIFFERENCE_MINUEND_FLOW=162, PETRI_DIFFERENCE_MINUEND_PLACES=75, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=71, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=58, PETRI_DIFFERENCE_SUBTRAHEND_STATES=64, PETRI_FLOW=991, PETRI_PLACES=168, PETRI_TRANSITIONS=202} [2022-07-12 10:38:10,111 INFO L279 CegarLoopForPetriNet]: 76 programPoint places, 92 predicate places. [2022-07-12 10:38:10,111 INFO L495 AbstractCegarLoop]: Abstraction has has 168 places, 202 transitions, 991 flow [2022-07-12 10:38:10,111 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 33 states have (on average 52.84848484848485) internal successors, (1744), 33 states have internal predecessors, (1744), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:38:10,111 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-12 10:38:10,112 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, 1, 1, 1, 1, 1, 1, 1] [2022-07-12 10:38:10,128 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2022-07-12 10:38:10,320 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 10:38:10,320 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-12 10:38:10,321 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 10:38:10,321 INFO L85 PathProgramCache]: Analyzing trace with hash 1569915595, now seen corresponding path program 2 times [2022-07-12 10:38:10,321 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 10:38:10,321 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1764874177] [2022-07-12 10:38:10,321 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 10:38:10,321 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 10:38:10,343 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 10:38:10,535 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 10:38:10,535 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 10:38:10,536 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1764874177] [2022-07-12 10:38:10,536 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1764874177] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-12 10:38:10,536 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [445463727] [2022-07-12 10:38:10,536 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-07-12 10:38:10,536 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 10:38:10,536 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-12 10:38:10,537 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) [2022-07-12 10:38:10,539 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-07-12 10:38:10,589 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-07-12 10:38:10,589 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-12 10:38:10,591 INFO L263 TraceCheckSpWp]: Trace formula consists of 155 conjuncts, 20 conjunts are in the unsatisfiable core [2022-07-12 10:38:10,595 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-12 10:38:10,849 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 10:38:10,849 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-12 10:38:11,220 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 10:38:11,221 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [445463727] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-12 10:38:11,221 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-12 10:38:11,221 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15, 15] total 32 [2022-07-12 10:38:11,222 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1506983634] [2022-07-12 10:38:11,222 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-12 10:38:11,222 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2022-07-12 10:38:11,222 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 10:38:11,223 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2022-07-12 10:38:11,223 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=158, Invalid=834, Unknown=0, NotChecked=0, Total=992 [2022-07-12 10:38:11,225 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 51 out of 86 [2022-07-12 10:38:11,226 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 168 places, 202 transitions, 991 flow. Second operand has 32 states, 32 states have (on average 52.875) internal successors, (1692), 32 states have internal predecessors, (1692), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:38:11,226 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-12 10:38:11,226 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 51 of 86 [2022-07-12 10:38:11,226 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-12 10:38:14,338 INFO L129 PetriNetUnfolder]: 452/1591 cut-off events. [2022-07-12 10:38:14,338 INFO L130 PetriNetUnfolder]: For 3915/3915 co-relation queries the response was YES. [2022-07-12 10:38:14,346 INFO L84 FinitePrefix]: Finished finitePrefix Result has 5255 conditions, 1591 events. 452/1591 cut-off events. For 3915/3915 co-relation queries the response was YES. Maximal size of possible extension queue 102. Compared 11989 event pairs, 43 based on Foata normal form. 9/1595 useless extension candidates. Maximal degree in co-relation 5219. Up to 381 conditions per place. [2022-07-12 10:38:14,352 INFO L132 encePairwiseOnDemand]: 70/86 looper letters, 227 selfloop transitions, 266 changer transitions 56/590 dead transitions. [2022-07-12 10:38:14,352 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 235 places, 590 transitions, 4581 flow [2022-07-12 10:38:14,352 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 87 states. [2022-07-12 10:38:14,353 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 87 states. [2022-07-12 10:38:14,358 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 87 states to 87 states and 4757 transitions. [2022-07-12 10:38:14,359 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.6357925688318632 [2022-07-12 10:38:14,360 INFO L72 ComplementDD]: Start complementDD. Operand 87 states and 4757 transitions. [2022-07-12 10:38:14,360 INFO L73 IsDeterministic]: Start isDeterministic. Operand 87 states and 4757 transitions. [2022-07-12 10:38:14,362 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-12 10:38:14,362 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 87 states and 4757 transitions. [2022-07-12 10:38:14,372 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 88 states, 87 states have (on average 54.67816091954023) internal successors, (4757), 87 states have internal predecessors, (4757), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:38:14,382 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 88 states, 88 states have (on average 86.0) internal successors, (7568), 88 states have internal predecessors, (7568), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:38:14,384 INFO L81 ComplementDD]: Finished complementDD. Result has 88 states, 88 states have (on average 86.0) internal successors, (7568), 88 states have internal predecessors, (7568), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:38:14,384 INFO L186 Difference]: Start difference. First operand has 168 places, 202 transitions, 991 flow. Second operand 87 states and 4757 transitions. [2022-07-12 10:38:14,384 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 235 places, 590 transitions, 4581 flow [2022-07-12 10:38:14,406 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 219 places, 590 transitions, 4047 flow, removed 248 selfloop flow, removed 16 redundant places. [2022-07-12 10:38:14,414 INFO L242 Difference]: Finished difference. Result has 269 places, 428 transitions, 3374 flow [2022-07-12 10:38:14,415 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=86, PETRI_DIFFERENCE_MINUEND_FLOW=911, PETRI_DIFFERENCE_MINUEND_PLACES=133, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=202, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=76, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=66, PETRI_DIFFERENCE_SUBTRAHEND_STATES=87, PETRI_FLOW=3374, PETRI_PLACES=269, PETRI_TRANSITIONS=428} [2022-07-12 10:38:14,417 INFO L279 CegarLoopForPetriNet]: 76 programPoint places, 193 predicate places. [2022-07-12 10:38:14,417 INFO L495 AbstractCegarLoop]: Abstraction has has 269 places, 428 transitions, 3374 flow [2022-07-12 10:38:14,418 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 32 states have (on average 52.875) internal successors, (1692), 32 states have internal predecessors, (1692), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:38:14,418 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-12 10:38:14,418 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, 1, 1, 1, 1, 1, 1, 1] [2022-07-12 10:38:14,435 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2022-07-12 10:38:14,634 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 [2022-07-12 10:38:14,634 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-12 10:38:14,635 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 10:38:14,635 INFO L85 PathProgramCache]: Analyzing trace with hash 1618685851, now seen corresponding path program 3 times [2022-07-12 10:38:14,635 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 10:38:14,635 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [927206042] [2022-07-12 10:38:14,635 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 10:38:14,635 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 10:38:14,657 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 10:38:14,802 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 10:38:14,803 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 10:38:14,803 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [927206042] [2022-07-12 10:38:14,803 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [927206042] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-12 10:38:14,803 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [211202619] [2022-07-12 10:38:14,803 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-07-12 10:38:14,803 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 10:38:14,803 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-12 10:38:14,804 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) [2022-07-12 10:38:14,805 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-07-12 10:38:14,847 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-07-12 10:38:14,847 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-12 10:38:14,848 INFO L263 TraceCheckSpWp]: Trace formula consists of 155 conjuncts, 20 conjunts are in the unsatisfiable core [2022-07-12 10:38:14,850 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-12 10:38:15,108 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 10:38:15,108 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-12 10:38:15,403 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 10:38:15,403 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [211202619] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-12 10:38:15,404 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-12 10:38:15,404 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15, 15] total 33 [2022-07-12 10:38:15,404 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [101059242] [2022-07-12 10:38:15,404 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-12 10:38:15,404 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2022-07-12 10:38:15,405 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 10:38:15,405 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2022-07-12 10:38:15,405 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=168, Invalid=888, Unknown=0, NotChecked=0, Total=1056 [2022-07-12 10:38:15,406 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 51 out of 86 [2022-07-12 10:38:15,408 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 269 places, 428 transitions, 3374 flow. Second operand has 33 states, 33 states have (on average 52.84848484848485) internal successors, (1744), 33 states have internal predecessors, (1744), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:38:15,408 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-12 10:38:15,408 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 51 of 86 [2022-07-12 10:38:15,408 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-12 10:38:18,208 INFO L129 PetriNetUnfolder]: 490/1647 cut-off events. [2022-07-12 10:38:18,208 INFO L130 PetriNetUnfolder]: For 15362/15362 co-relation queries the response was YES. [2022-07-12 10:38:18,217 INFO L84 FinitePrefix]: Finished finitePrefix Result has 7785 conditions, 1647 events. 490/1647 cut-off events. For 15362/15362 co-relation queries the response was YES. Maximal size of possible extension queue 110. Compared 12348 event pairs, 16 based on Foata normal form. 2/1646 useless extension candidates. Maximal degree in co-relation 7714. Up to 315 conditions per place. [2022-07-12 10:38:18,225 INFO L132 encePairwiseOnDemand]: 70/86 looper letters, 190 selfloop transitions, 394 changer transitions 32/657 dead transitions. [2022-07-12 10:38:18,225 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 334 places, 657 transitions, 7175 flow [2022-07-12 10:38:18,227 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 83 states. [2022-07-12 10:38:18,227 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 83 states. [2022-07-12 10:38:18,229 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 83 states to 83 states and 4564 transitions. [2022-07-12 10:38:18,231 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.6393947884561502 [2022-07-12 10:38:18,231 INFO L72 ComplementDD]: Start complementDD. Operand 83 states and 4564 transitions. [2022-07-12 10:38:18,231 INFO L73 IsDeterministic]: Start isDeterministic. Operand 83 states and 4564 transitions. [2022-07-12 10:38:18,232 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-12 10:38:18,232 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 83 states and 4564 transitions. [2022-07-12 10:38:18,237 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 84 states, 83 states have (on average 54.98795180722892) internal successors, (4564), 83 states have internal predecessors, (4564), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:38:18,243 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 84 states, 84 states have (on average 86.0) internal successors, (7224), 84 states have internal predecessors, (7224), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:38:18,244 INFO L81 ComplementDD]: Finished complementDD. Result has 84 states, 84 states have (on average 86.0) internal successors, (7224), 84 states have internal predecessors, (7224), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:38:18,245 INFO L186 Difference]: Start difference. First operand has 269 places, 428 transitions, 3374 flow. Second operand 83 states and 4564 transitions. [2022-07-12 10:38:18,245 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 334 places, 657 transitions, 7175 flow [2022-07-12 10:38:18,331 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 322 places, 657 transitions, 6691 flow, removed 242 selfloop flow, removed 12 redundant places. [2022-07-12 10:38:18,341 INFO L242 Difference]: Finished difference. Result has 338 places, 522 transitions, 4999 flow [2022-07-12 10:38:18,342 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=86, PETRI_DIFFERENCE_MINUEND_FLOW=3216, PETRI_DIFFERENCE_MINUEND_PLACES=240, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=428, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=301, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=116, PETRI_DIFFERENCE_SUBTRAHEND_STATES=83, PETRI_FLOW=4999, PETRI_PLACES=338, PETRI_TRANSITIONS=522} [2022-07-12 10:38:18,344 INFO L279 CegarLoopForPetriNet]: 76 programPoint places, 262 predicate places. [2022-07-12 10:38:18,344 INFO L495 AbstractCegarLoop]: Abstraction has has 338 places, 522 transitions, 4999 flow [2022-07-12 10:38:18,345 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 33 states have (on average 52.84848484848485) internal successors, (1744), 33 states have internal predecessors, (1744), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:38:18,345 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-12 10:38:18,345 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, 1, 1, 1, 1, 1, 1, 1] [2022-07-12 10:38:18,364 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-07-12 10:38:18,547 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 [2022-07-12 10:38:18,547 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-12 10:38:18,548 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 10:38:18,548 INFO L85 PathProgramCache]: Analyzing trace with hash -2101775999, now seen corresponding path program 4 times [2022-07-12 10:38:18,548 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 10:38:18,548 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1907110364] [2022-07-12 10:38:18,548 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 10:38:18,548 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 10:38:18,572 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 10:38:18,720 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 10:38:18,720 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 10:38:18,720 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1907110364] [2022-07-12 10:38:18,720 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1907110364] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-12 10:38:18,720 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [23578880] [2022-07-12 10:38:18,720 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-07-12 10:38:18,720 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 10:38:18,720 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-12 10:38:18,721 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) [2022-07-12 10:38:18,722 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-07-12 10:38:18,775 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-07-12 10:38:18,775 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-12 10:38:18,776 INFO L263 TraceCheckSpWp]: Trace formula consists of 135 conjuncts, 20 conjunts are in the unsatisfiable core [2022-07-12 10:38:18,785 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-12 10:38:19,067 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 10:38:19,068 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-12 10:38:19,382 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 10:38:19,382 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [23578880] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-12 10:38:19,382 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-12 10:38:19,382 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15, 15] total 33 [2022-07-12 10:38:19,382 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2012926046] [2022-07-12 10:38:19,383 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-12 10:38:19,383 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2022-07-12 10:38:19,383 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 10:38:19,383 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2022-07-12 10:38:19,383 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=176, Invalid=880, Unknown=0, NotChecked=0, Total=1056 [2022-07-12 10:38:19,384 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 51 out of 86 [2022-07-12 10:38:19,385 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 338 places, 522 transitions, 4999 flow. Second operand has 33 states, 33 states have (on average 52.81818181818182) internal successors, (1743), 33 states have internal predecessors, (1743), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:38:19,385 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-12 10:38:19,386 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 51 of 86 [2022-07-12 10:38:19,386 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-12 10:38:22,121 INFO L129 PetriNetUnfolder]: 650/2189 cut-off events. [2022-07-12 10:38:22,121 INFO L130 PetriNetUnfolder]: For 24593/24593 co-relation queries the response was YES. [2022-07-12 10:38:22,132 INFO L84 FinitePrefix]: Finished finitePrefix Result has 11480 conditions, 2189 events. 650/2189 cut-off events. For 24593/24593 co-relation queries the response was YES. Maximal size of possible extension queue 146. Compared 17713 event pairs, 22 based on Foata normal form. 3/2189 useless extension candidates. Maximal degree in co-relation 11404. Up to 427 conditions per place. [2022-07-12 10:38:22,143 INFO L132 encePairwiseOnDemand]: 71/86 looper letters, 299 selfloop transitions, 484 changer transitions 24/848 dead transitions. [2022-07-12 10:38:22,143 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 403 places, 848 transitions, 10549 flow [2022-07-12 10:38:22,143 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 78 states. [2022-07-12 10:38:22,144 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 78 states. [2022-07-12 10:38:22,146 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 78 states to 78 states and 4335 transitions. [2022-07-12 10:38:22,147 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.6462432915921288 [2022-07-12 10:38:22,147 INFO L72 ComplementDD]: Start complementDD. Operand 78 states and 4335 transitions. [2022-07-12 10:38:22,147 INFO L73 IsDeterministic]: Start isDeterministic. Operand 78 states and 4335 transitions. [2022-07-12 10:38:22,148 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-12 10:38:22,148 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 78 states and 4335 transitions. [2022-07-12 10:38:22,153 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 79 states, 78 states have (on average 55.57692307692308) internal successors, (4335), 78 states have internal predecessors, (4335), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:38:22,158 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 79 states, 79 states have (on average 86.0) internal successors, (6794), 79 states have internal predecessors, (6794), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:38:22,168 INFO L81 ComplementDD]: Finished complementDD. Result has 79 states, 79 states have (on average 86.0) internal successors, (6794), 79 states have internal predecessors, (6794), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:38:22,173 INFO L186 Difference]: Start difference. First operand has 338 places, 522 transitions, 4999 flow. Second operand 78 states and 4335 transitions. [2022-07-12 10:38:22,173 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 403 places, 848 transitions, 10549 flow [2022-07-12 10:38:22,294 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 363 places, 848 transitions, 9655 flow, removed 201 selfloop flow, removed 40 redundant places. [2022-07-12 10:38:22,302 INFO L242 Difference]: Finished difference. Result has 391 places, 664 transitions, 7404 flow [2022-07-12 10:38:22,303 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=86, PETRI_DIFFERENCE_MINUEND_FLOW=4448, PETRI_DIFFERENCE_MINUEND_PLACES=286, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=522, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=354, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=146, PETRI_DIFFERENCE_SUBTRAHEND_STATES=78, PETRI_FLOW=7404, PETRI_PLACES=391, PETRI_TRANSITIONS=664} [2022-07-12 10:38:22,303 INFO L279 CegarLoopForPetriNet]: 76 programPoint places, 315 predicate places. [2022-07-12 10:38:22,304 INFO L495 AbstractCegarLoop]: Abstraction has has 391 places, 664 transitions, 7404 flow [2022-07-12 10:38:22,305 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 33 states have (on average 52.81818181818182) internal successors, (1743), 33 states have internal predecessors, (1743), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:38:22,305 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-12 10:38:22,305 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, 1, 1, 1, 1, 1, 1, 1] [2022-07-12 10:38:22,321 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2022-07-12 10:38:22,519 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 10:38:22,520 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-12 10:38:22,520 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 10:38:22,520 INFO L85 PathProgramCache]: Analyzing trace with hash 512513747, now seen corresponding path program 5 times [2022-07-12 10:38:22,520 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 10:38:22,520 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [653852828] [2022-07-12 10:38:22,520 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 10:38:22,520 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 10:38:22,534 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 10:38:22,701 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 10:38:22,701 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 10:38:22,701 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [653852828] [2022-07-12 10:38:22,701 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [653852828] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-12 10:38:22,701 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1048264165] [2022-07-12 10:38:22,702 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-07-12 10:38:22,702 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 10:38:22,702 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-12 10:38:22,706 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) [2022-07-12 10:38:22,707 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-07-12 10:38:22,747 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-07-12 10:38:22,747 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-12 10:38:22,748 INFO L263 TraceCheckSpWp]: Trace formula consists of 155 conjuncts, 20 conjunts are in the unsatisfiable core [2022-07-12 10:38:22,749 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-12 10:38:23,012 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 10:38:23,012 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-12 10:38:23,361 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 10:38:23,361 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1048264165] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-12 10:38:23,361 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-12 10:38:23,361 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15, 15] total 33 [2022-07-12 10:38:23,361 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [58337221] [2022-07-12 10:38:23,361 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-12 10:38:23,361 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2022-07-12 10:38:23,362 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 10:38:23,362 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2022-07-12 10:38:23,362 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=175, Invalid=881, Unknown=0, NotChecked=0, Total=1056 [2022-07-12 10:38:23,363 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 51 out of 86 [2022-07-12 10:38:23,364 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 391 places, 664 transitions, 7404 flow. Second operand has 33 states, 33 states have (on average 52.878787878787875) internal successors, (1745), 33 states have internal predecessors, (1745), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:38:23,364 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-12 10:38:23,364 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 51 of 86 [2022-07-12 10:38:23,364 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-12 10:38:26,657 INFO L129 PetriNetUnfolder]: 665/2221 cut-off events. [2022-07-12 10:38:26,657 INFO L130 PetriNetUnfolder]: For 37552/37552 co-relation queries the response was YES. [2022-07-12 10:38:26,670 INFO L84 FinitePrefix]: Finished finitePrefix Result has 13155 conditions, 2221 events. 665/2221 cut-off events. For 37552/37552 co-relation queries the response was YES. Maximal size of possible extension queue 142. Compared 17983 event pairs, 28 based on Foata normal form. 5/2222 useless extension candidates. Maximal degree in co-relation 13060. Up to 425 conditions per place. [2022-07-12 10:38:26,681 INFO L132 encePairwiseOnDemand]: 70/86 looper letters, 249 selfloop transitions, 523 changer transitions 35/848 dead transitions. [2022-07-12 10:38:26,681 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 473 places, 848 transitions, 11873 flow [2022-07-12 10:38:26,681 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 92 states. [2022-07-12 10:38:26,682 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 92 states. [2022-07-12 10:38:26,684 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 92 states to 92 states and 5073 transitions. [2022-07-12 10:38:26,685 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.6411779575328614 [2022-07-12 10:38:26,685 INFO L72 ComplementDD]: Start complementDD. Operand 92 states and 5073 transitions. [2022-07-12 10:38:26,685 INFO L73 IsDeterministic]: Start isDeterministic. Operand 92 states and 5073 transitions. [2022-07-12 10:38:26,686 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-12 10:38:26,686 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 92 states and 5073 transitions. [2022-07-12 10:38:26,691 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 93 states, 92 states have (on average 55.141304347826086) internal successors, (5073), 92 states have internal predecessors, (5073), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:38:26,697 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 93 states, 93 states have (on average 86.0) internal successors, (7998), 93 states have internal predecessors, (7998), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:38:26,698 INFO L81 ComplementDD]: Finished complementDD. Result has 93 states, 93 states have (on average 86.0) internal successors, (7998), 93 states have internal predecessors, (7998), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:38:26,698 INFO L186 Difference]: Start difference. First operand has 391 places, 664 transitions, 7404 flow. Second operand 92 states and 5073 transitions. [2022-07-12 10:38:26,698 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 473 places, 848 transitions, 11873 flow [2022-07-12 10:38:26,840 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 441 places, 848 transitions, 11067 flow, removed 283 selfloop flow, removed 32 redundant places. [2022-07-12 10:38:26,851 INFO L242 Difference]: Finished difference. Result has 461 places, 689 transitions, 8557 flow [2022-07-12 10:38:26,852 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=86, PETRI_DIFFERENCE_MINUEND_FLOW=6847, PETRI_DIFFERENCE_MINUEND_PLACES=350, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=664, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=495, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=156, PETRI_DIFFERENCE_SUBTRAHEND_STATES=92, PETRI_FLOW=8557, PETRI_PLACES=461, PETRI_TRANSITIONS=689} [2022-07-12 10:38:26,852 INFO L279 CegarLoopForPetriNet]: 76 programPoint places, 385 predicate places. [2022-07-12 10:38:26,852 INFO L495 AbstractCegarLoop]: Abstraction has has 461 places, 689 transitions, 8557 flow [2022-07-12 10:38:26,853 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 33 states have (on average 52.878787878787875) internal successors, (1745), 33 states have internal predecessors, (1745), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:38:26,853 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-12 10:38:26,853 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, 1, 1, 1, 1, 1, 1, 1] [2022-07-12 10:38:26,881 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2022-07-12 10:38:27,067 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 10:38:27,068 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-12 10:38:27,068 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 10:38:27,068 INFO L85 PathProgramCache]: Analyzing trace with hash -1925482755, now seen corresponding path program 6 times [2022-07-12 10:38:27,068 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 10:38:27,068 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [763478648] [2022-07-12 10:38:27,069 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 10:38:27,069 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 10:38:27,080 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 10:38:27,294 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 10:38:27,294 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 10:38:27,294 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [763478648] [2022-07-12 10:38:27,294 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [763478648] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-12 10:38:27,295 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1129456140] [2022-07-12 10:38:27,295 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-07-12 10:38:27,295 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 10:38:27,295 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-12 10:38:27,296 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) [2022-07-12 10:38:27,297 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-07-12 10:38:27,340 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-07-12 10:38:27,340 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-12 10:38:27,341 INFO L263 TraceCheckSpWp]: Trace formula consists of 155 conjuncts, 23 conjunts are in the unsatisfiable core [2022-07-12 10:38:27,344 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-12 10:38:27,720 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 10:38:27,721 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-12 10:38:28,276 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 10:38:28,276 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1129456140] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-12 10:38:28,276 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-12 10:38:28,276 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 16, 17] total 38 [2022-07-12 10:38:28,276 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2098200233] [2022-07-12 10:38:28,276 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-12 10:38:28,277 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 38 states [2022-07-12 10:38:28,277 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 10:38:28,277 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2022-07-12 10:38:28,277 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=194, Invalid=1212, Unknown=0, NotChecked=0, Total=1406 [2022-07-12 10:38:28,278 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 51 out of 86 [2022-07-12 10:38:28,279 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 461 places, 689 transitions, 8557 flow. Second operand has 38 states, 38 states have (on average 52.78947368421053) internal successors, (2006), 38 states have internal predecessors, (2006), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:38:28,279 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-12 10:38:28,279 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 51 of 86 [2022-07-12 10:38:28,279 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-12 10:38:30,849 INFO L129 PetriNetUnfolder]: 887/2912 cut-off events. [2022-07-12 10:38:30,850 INFO L130 PetriNetUnfolder]: For 49528/49528 co-relation queries the response was YES. [2022-07-12 10:38:30,870 INFO L84 FinitePrefix]: Finished finitePrefix Result has 18206 conditions, 2912 events. 887/2912 cut-off events. For 49528/49528 co-relation queries the response was YES. Maximal size of possible extension queue 187. Compared 25336 event pairs, 33 based on Foata normal form. 2/2905 useless extension candidates. Maximal degree in co-relation 18100. Up to 777 conditions per place. [2022-07-12 10:38:30,885 INFO L132 encePairwiseOnDemand]: 66/86 looper letters, 296 selfloop transitions, 714 changer transitions 36/1087 dead transitions. [2022-07-12 10:38:30,885 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 510 places, 1087 transitions, 16485 flow [2022-07-12 10:38:30,885 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 64 states. [2022-07-12 10:38:30,885 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 64 states. [2022-07-12 10:38:30,929 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 3501 transitions. [2022-07-12 10:38:30,930 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.6360828488372093 [2022-07-12 10:38:30,930 INFO L72 ComplementDD]: Start complementDD. Operand 64 states and 3501 transitions. [2022-07-12 10:38:30,930 INFO L73 IsDeterministic]: Start isDeterministic. Operand 64 states and 3501 transitions. [2022-07-12 10:38:30,931 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-12 10:38:30,931 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 64 states and 3501 transitions. [2022-07-12 10:38:30,934 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 65 states, 64 states have (on average 54.703125) internal successors, (3501), 64 states have internal predecessors, (3501), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:38:30,938 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 65 states, 65 states have (on average 86.0) internal successors, (5590), 65 states have internal predecessors, (5590), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:38:30,939 INFO L81 ComplementDD]: Finished complementDD. Result has 65 states, 65 states have (on average 86.0) internal successors, (5590), 65 states have internal predecessors, (5590), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:38:30,939 INFO L186 Difference]: Start difference. First operand has 461 places, 689 transitions, 8557 flow. Second operand 64 states and 3501 transitions. [2022-07-12 10:38:30,939 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 510 places, 1087 transitions, 16485 flow [2022-07-12 10:38:31,189 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 444 places, 1087 transitions, 15330 flow, removed 147 selfloop flow, removed 66 redundant places. [2022-07-12 10:38:31,202 INFO L242 Difference]: Finished difference. Result has 468 places, 971 transitions, 14134 flow [2022-07-12 10:38:31,203 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=86, PETRI_DIFFERENCE_MINUEND_FLOW=7795, PETRI_DIFFERENCE_MINUEND_PLACES=381, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=689, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=459, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=172, PETRI_DIFFERENCE_SUBTRAHEND_STATES=64, PETRI_FLOW=14134, PETRI_PLACES=468, PETRI_TRANSITIONS=971} [2022-07-12 10:38:31,203 INFO L279 CegarLoopForPetriNet]: 76 programPoint places, 392 predicate places. [2022-07-12 10:38:31,203 INFO L495 AbstractCegarLoop]: Abstraction has has 468 places, 971 transitions, 14134 flow [2022-07-12 10:38:31,204 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 38 states, 38 states have (on average 52.78947368421053) internal successors, (2006), 38 states have internal predecessors, (2006), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:38:31,204 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-12 10:38:31,204 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, 1, 1, 1, 1, 1, 1, 1] [2022-07-12 10:38:31,221 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2022-07-12 10:38:31,407 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 10:38:31,408 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-12 10:38:31,408 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 10:38:31,408 INFO L85 PathProgramCache]: Analyzing trace with hash -384124897, now seen corresponding path program 7 times [2022-07-12 10:38:31,408 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 10:38:31,408 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1425230034] [2022-07-12 10:38:31,408 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 10:38:31,409 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 10:38:31,418 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 10:38:31,585 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 10:38:31,586 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 10:38:31,586 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1425230034] [2022-07-12 10:38:31,586 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1425230034] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-12 10:38:31,586 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1114239652] [2022-07-12 10:38:31,586 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-07-12 10:38:31,586 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 10:38:31,586 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-12 10:38:31,587 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) [2022-07-12 10:38:31,590 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-07-12 10:38:31,651 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 10:38:31,652 INFO L263 TraceCheckSpWp]: Trace formula consists of 155 conjuncts, 20 conjunts are in the unsatisfiable core [2022-07-12 10:38:31,653 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-12 10:38:31,930 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 10:38:31,930 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-12 10:38:32,235 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 10:38:32,236 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1114239652] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-12 10:38:32,236 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-12 10:38:32,236 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15, 15] total 33 [2022-07-12 10:38:32,238 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1990338799] [2022-07-12 10:38:32,238 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-12 10:38:32,239 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2022-07-12 10:38:32,239 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 10:38:32,239 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2022-07-12 10:38:32,239 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=164, Invalid=892, Unknown=0, NotChecked=0, Total=1056 [2022-07-12 10:38:32,241 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 51 out of 86 [2022-07-12 10:38:32,242 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 468 places, 971 transitions, 14134 flow. Second operand has 33 states, 33 states have (on average 52.81818181818182) internal successors, (1743), 33 states have internal predecessors, (1743), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:38:32,242 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-12 10:38:32,242 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 51 of 86 [2022-07-12 10:38:32,242 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-12 10:38:35,289 INFO L129 PetriNetUnfolder]: 947/3122 cut-off events. [2022-07-12 10:38:35,289 INFO L130 PetriNetUnfolder]: For 58740/58740 co-relation queries the response was YES. [2022-07-12 10:38:35,315 INFO L84 FinitePrefix]: Finished finitePrefix Result has 21444 conditions, 3122 events. 947/3122 cut-off events. For 58740/58740 co-relation queries the response was YES. Maximal size of possible extension queue 200. Compared 27451 event pairs, 58 based on Foata normal form. 2/3118 useless extension candidates. Maximal degree in co-relation 21327. Up to 950 conditions per place. [2022-07-12 10:38:35,331 INFO L132 encePairwiseOnDemand]: 71/86 looper letters, 330 selfloop transitions, 852 changer transitions 12/1235 dead transitions. [2022-07-12 10:38:35,331 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 527 places, 1235 transitions, 21050 flow [2022-07-12 10:38:35,331 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 68 states. [2022-07-12 10:38:35,332 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 68 states. [2022-07-12 10:38:35,333 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68 states to 68 states and 3758 transitions. [2022-07-12 10:38:35,334 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.6426128590971272 [2022-07-12 10:38:35,334 INFO L72 ComplementDD]: Start complementDD. Operand 68 states and 3758 transitions. [2022-07-12 10:38:35,334 INFO L73 IsDeterministic]: Start isDeterministic. Operand 68 states and 3758 transitions. [2022-07-12 10:38:35,335 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-12 10:38:35,335 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 68 states and 3758 transitions. [2022-07-12 10:38:35,339 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 69 states, 68 states have (on average 55.26470588235294) internal successors, (3758), 68 states have internal predecessors, (3758), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:38:35,343 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 69 states, 69 states have (on average 86.0) internal successors, (5934), 69 states have internal predecessors, (5934), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:38:35,343 INFO L81 ComplementDD]: Finished complementDD. Result has 69 states, 69 states have (on average 86.0) internal successors, (5934), 69 states have internal predecessors, (5934), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:38:35,344 INFO L186 Difference]: Start difference. First operand has 468 places, 971 transitions, 14134 flow. Second operand 68 states and 3758 transitions. [2022-07-12 10:38:35,344 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 527 places, 1235 transitions, 21050 flow [2022-07-12 10:38:35,793 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 500 places, 1235 transitions, 20056 flow, removed 335 selfloop flow, removed 27 redundant places. [2022-07-12 10:38:35,811 INFO L242 Difference]: Finished difference. Result has 521 places, 1131 transitions, 19020 flow [2022-07-12 10:38:35,813 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=86, PETRI_DIFFERENCE_MINUEND_FLOW=13421, PETRI_DIFFERENCE_MINUEND_PLACES=433, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=971, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=698, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=216, PETRI_DIFFERENCE_SUBTRAHEND_STATES=68, PETRI_FLOW=19020, PETRI_PLACES=521, PETRI_TRANSITIONS=1131} [2022-07-12 10:38:35,814 INFO L279 CegarLoopForPetriNet]: 76 programPoint places, 445 predicate places. [2022-07-12 10:38:35,814 INFO L495 AbstractCegarLoop]: Abstraction has has 521 places, 1131 transitions, 19020 flow [2022-07-12 10:38:35,815 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 33 states have (on average 52.81818181818182) internal successors, (1743), 33 states have internal predecessors, (1743), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:38:35,815 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-12 10:38:35,815 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, 1, 1, 1, 1, 1, 1, 1] [2022-07-12 10:38:35,838 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2022-07-12 10:38:36,015 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 10:38:36,016 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-12 10:38:36,016 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 10:38:36,016 INFO L85 PathProgramCache]: Analyzing trace with hash 191624049, now seen corresponding path program 8 times [2022-07-12 10:38:36,016 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 10:38:36,016 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [215262881] [2022-07-12 10:38:36,016 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 10:38:36,016 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 10:38:36,027 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 10:38:36,242 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 10:38:36,243 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 10:38:36,243 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [215262881] [2022-07-12 10:38:36,243 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [215262881] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-12 10:38:36,243 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [386499488] [2022-07-12 10:38:36,243 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-07-12 10:38:36,243 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 10:38:36,243 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-12 10:38:36,244 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) [2022-07-12 10:38:36,245 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-07-12 10:38:36,290 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-07-12 10:38:36,290 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-12 10:38:36,291 INFO L263 TraceCheckSpWp]: Trace formula consists of 155 conjuncts, 20 conjunts are in the unsatisfiable core [2022-07-12 10:38:36,292 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-12 10:38:36,563 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 10:38:36,563 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-12 10:38:36,918 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 10:38:36,918 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [386499488] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-12 10:38:36,918 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-12 10:38:36,918 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15, 15] total 33 [2022-07-12 10:38:36,918 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [658635640] [2022-07-12 10:38:36,918 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-12 10:38:36,918 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2022-07-12 10:38:36,918 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 10:38:36,919 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2022-07-12 10:38:36,919 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=169, Invalid=887, Unknown=0, NotChecked=0, Total=1056 [2022-07-12 10:38:36,920 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 51 out of 86 [2022-07-12 10:38:36,921 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 521 places, 1131 transitions, 19020 flow. Second operand has 33 states, 33 states have (on average 52.878787878787875) internal successors, (1745), 33 states have internal predecessors, (1745), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:38:36,921 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-12 10:38:36,921 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 51 of 86 [2022-07-12 10:38:36,921 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-12 10:38:39,543 INFO L129 PetriNetUnfolder]: 947/3111 cut-off events. [2022-07-12 10:38:39,543 INFO L130 PetriNetUnfolder]: For 71630/71630 co-relation queries the response was YES. [2022-07-12 10:38:39,567 INFO L84 FinitePrefix]: Finished finitePrefix Result has 22562 conditions, 3111 events. 947/3111 cut-off events. For 71630/71630 co-relation queries the response was YES. Maximal size of possible extension queue 201. Compared 27379 event pairs, 69 based on Foata normal form. 2/3107 useless extension candidates. Maximal degree in co-relation 22442. Up to 905 conditions per place. [2022-07-12 10:38:39,583 INFO L132 encePairwiseOnDemand]: 70/86 looper letters, 391 selfloop transitions, 776 changer transitions 14/1222 dead transitions. [2022-07-12 10:38:39,583 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 576 places, 1222 transitions, 22967 flow [2022-07-12 10:38:39,583 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 62 states. [2022-07-12 10:38:39,583 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 62 states. [2022-07-12 10:38:39,585 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 3416 transitions. [2022-07-12 10:38:39,586 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.6406601650412603 [2022-07-12 10:38:39,586 INFO L72 ComplementDD]: Start complementDD. Operand 62 states and 3416 transitions. [2022-07-12 10:38:39,586 INFO L73 IsDeterministic]: Start isDeterministic. Operand 62 states and 3416 transitions. [2022-07-12 10:38:39,587 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-12 10:38:39,587 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 62 states and 3416 transitions. [2022-07-12 10:38:39,590 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 63 states, 62 states have (on average 55.096774193548384) internal successors, (3416), 62 states have internal predecessors, (3416), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:38:39,593 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 63 states, 63 states have (on average 86.0) internal successors, (5418), 63 states have internal predecessors, (5418), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:38:39,594 INFO L81 ComplementDD]: Finished complementDD. Result has 63 states, 63 states have (on average 86.0) internal successors, (5418), 63 states have internal predecessors, (5418), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:38:39,594 INFO L186 Difference]: Start difference. First operand has 521 places, 1131 transitions, 19020 flow. Second operand 62 states and 3416 transitions. [2022-07-12 10:38:39,594 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 576 places, 1222 transitions, 22967 flow [2022-07-12 10:38:40,040 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 540 places, 1222 transitions, 21899 flow, removed 243 selfloop flow, removed 36 redundant places. [2022-07-12 10:38:40,058 INFO L242 Difference]: Finished difference. Result has 550 places, 1141 transitions, 19828 flow [2022-07-12 10:38:40,060 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=86, PETRI_DIFFERENCE_MINUEND_FLOW=18007, PETRI_DIFFERENCE_MINUEND_PLACES=479, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1131, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=764, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=359, PETRI_DIFFERENCE_SUBTRAHEND_STATES=62, PETRI_FLOW=19828, PETRI_PLACES=550, PETRI_TRANSITIONS=1141} [2022-07-12 10:38:40,061 INFO L279 CegarLoopForPetriNet]: 76 programPoint places, 474 predicate places. [2022-07-12 10:38:40,061 INFO L495 AbstractCegarLoop]: Abstraction has has 550 places, 1141 transitions, 19828 flow [2022-07-12 10:38:40,061 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 33 states have (on average 52.878787878787875) internal successors, (1745), 33 states have internal predecessors, (1745), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:38:40,061 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-12 10:38:40,061 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, 1, 1, 1, 1, 1, 1, 1] [2022-07-12 10:38:40,077 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2022-07-12 10:38:40,263 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,SelfDestructingSolverStorable10 [2022-07-12 10:38:40,263 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-12 10:38:40,264 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 10:38:40,264 INFO L85 PathProgramCache]: Analyzing trace with hash 866299875, now seen corresponding path program 9 times [2022-07-12 10:38:40,264 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 10:38:40,264 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1348016661] [2022-07-12 10:38:40,264 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 10:38:40,264 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 10:38:40,274 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 10:38:40,464 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 10:38:40,464 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 10:38:40,464 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1348016661] [2022-07-12 10:38:40,464 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1348016661] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-12 10:38:40,464 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1676674231] [2022-07-12 10:38:40,464 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-07-12 10:38:40,464 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 10:38:40,465 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-12 10:38:40,465 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) [2022-07-12 10:38:40,467 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2022-07-12 10:38:40,511 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-07-12 10:38:40,511 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-12 10:38:40,512 INFO L263 TraceCheckSpWp]: Trace formula consists of 155 conjuncts, 20 conjunts are in the unsatisfiable core [2022-07-12 10:38:40,513 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-12 10:38:40,822 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 10:38:40,822 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-12 10:38:41,106 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 10:38:41,107 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1676674231] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-12 10:38:41,107 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-12 10:38:41,107 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15, 15] total 33 [2022-07-12 10:38:41,107 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1189032629] [2022-07-12 10:38:41,107 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-12 10:38:41,108 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2022-07-12 10:38:41,108 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 10:38:41,108 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2022-07-12 10:38:41,109 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=159, Invalid=897, Unknown=0, NotChecked=0, Total=1056 [2022-07-12 10:38:41,109 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 51 out of 86 [2022-07-12 10:38:41,110 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 550 places, 1141 transitions, 19828 flow. Second operand has 33 states, 33 states have (on average 52.81818181818182) internal successors, (1743), 33 states have internal predecessors, (1743), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:38:41,110 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-12 10:38:41,110 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 51 of 86 [2022-07-12 10:38:41,110 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-12 10:38:43,240 INFO L129 PetriNetUnfolder]: 1014/3285 cut-off events. [2022-07-12 10:38:43,240 INFO L130 PetriNetUnfolder]: For 75708/75708 co-relation queries the response was YES. [2022-07-12 10:38:43,274 INFO L84 FinitePrefix]: Finished finitePrefix Result has 24752 conditions, 3285 events. 1014/3285 cut-off events. For 75708/75708 co-relation queries the response was YES. Maximal size of possible extension queue 217. Compared 29142 event pairs, 71 based on Foata normal form. 1/3277 useless extension candidates. Maximal degree in co-relation 24629. Up to 1420 conditions per place. [2022-07-12 10:38:43,295 INFO L132 encePairwiseOnDemand]: 71/86 looper letters, 534 selfloop transitions, 731 changer transitions 6/1312 dead transitions. [2022-07-12 10:38:43,295 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 583 places, 1312 transitions, 25324 flow [2022-07-12 10:38:43,295 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2022-07-12 10:38:43,296 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 42 states. [2022-07-12 10:38:43,297 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 2311 transitions. [2022-07-12 10:38:43,298 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.6398117386489479 [2022-07-12 10:38:43,298 INFO L72 ComplementDD]: Start complementDD. Operand 42 states and 2311 transitions. [2022-07-12 10:38:43,298 INFO L73 IsDeterministic]: Start isDeterministic. Operand 42 states and 2311 transitions. [2022-07-12 10:38:43,299 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-12 10:38:43,299 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 42 states and 2311 transitions. [2022-07-12 10:38:43,301 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 43 states, 42 states have (on average 55.023809523809526) internal successors, (2311), 42 states have internal predecessors, (2311), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:38:43,304 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 43 states, 43 states have (on average 86.0) internal successors, (3698), 43 states have internal predecessors, (3698), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:38:43,305 INFO L81 ComplementDD]: Finished complementDD. Result has 43 states, 43 states have (on average 86.0) internal successors, (3698), 43 states have internal predecessors, (3698), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:38:43,305 INFO L186 Difference]: Start difference. First operand has 550 places, 1141 transitions, 19828 flow. Second operand 42 states and 2311 transitions. [2022-07-12 10:38:43,306 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 583 places, 1312 transitions, 25324 flow [2022-07-12 10:38:43,847 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 550 places, 1312 transitions, 24867 flow, removed 45 selfloop flow, removed 33 redundant places. [2022-07-12 10:38:43,869 INFO L242 Difference]: Finished difference. Result has 567 places, 1256 transitions, 24144 flow [2022-07-12 10:38:43,870 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=86, PETRI_DIFFERENCE_MINUEND_FLOW=19445, PETRI_DIFFERENCE_MINUEND_PLACES=509, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1141, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=633, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=481, PETRI_DIFFERENCE_SUBTRAHEND_STATES=42, PETRI_FLOW=24144, PETRI_PLACES=567, PETRI_TRANSITIONS=1256} [2022-07-12 10:38:43,870 INFO L279 CegarLoopForPetriNet]: 76 programPoint places, 491 predicate places. [2022-07-12 10:38:43,870 INFO L495 AbstractCegarLoop]: Abstraction has has 567 places, 1256 transitions, 24144 flow [2022-07-12 10:38:43,871 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 33 states have (on average 52.81818181818182) internal successors, (1743), 33 states have internal predecessors, (1743), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:38:43,871 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-12 10:38:43,871 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, 1, 1, 1, 1, 1, 1, 1] [2022-07-12 10:38:43,888 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2022-07-12 10:38:44,088 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 10:38:44,088 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-12 10:38:44,088 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 10:38:44,089 INFO L85 PathProgramCache]: Analyzing trace with hash -702432183, now seen corresponding path program 10 times [2022-07-12 10:38:44,089 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 10:38:44,089 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1422647799] [2022-07-12 10:38:44,089 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 10:38:44,089 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 10:38:44,104 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 10:38:44,275 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 10:38:44,275 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 10:38:44,275 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1422647799] [2022-07-12 10:38:44,275 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1422647799] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-12 10:38:44,275 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1938297192] [2022-07-12 10:38:44,275 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-07-12 10:38:44,276 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 10:38:44,276 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-12 10:38:44,277 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) [2022-07-12 10:38:44,278 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2022-07-12 10:38:44,363 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-07-12 10:38:44,363 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-12 10:38:44,363 INFO L263 TraceCheckSpWp]: Trace formula consists of 135 conjuncts, 20 conjunts are in the unsatisfiable core [2022-07-12 10:38:44,364 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-12 10:38:44,609 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 10:38:44,609 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-12 10:38:44,925 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 10:38:44,926 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1938297192] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-12 10:38:44,926 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-12 10:38:44,926 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15, 15] total 33 [2022-07-12 10:38:44,926 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [475424705] [2022-07-12 10:38:44,926 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-12 10:38:44,926 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2022-07-12 10:38:44,926 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 10:38:44,927 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2022-07-12 10:38:44,927 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=166, Invalid=890, Unknown=0, NotChecked=0, Total=1056 [2022-07-12 10:38:44,928 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 51 out of 86 [2022-07-12 10:38:44,929 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 567 places, 1256 transitions, 24144 flow. Second operand has 33 states, 33 states have (on average 52.84848484848485) internal successors, (1744), 33 states have internal predecessors, (1744), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:38:44,929 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-12 10:38:44,929 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 51 of 86 [2022-07-12 10:38:44,929 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-12 10:38:47,585 INFO L129 PetriNetUnfolder]: 1050/3409 cut-off events. [2022-07-12 10:38:47,585 INFO L130 PetriNetUnfolder]: For 84144/84144 co-relation queries the response was YES. [2022-07-12 10:38:47,614 INFO L84 FinitePrefix]: Finished finitePrefix Result has 27520 conditions, 3409 events. 1050/3409 cut-off events. For 84144/84144 co-relation queries the response was YES. Maximal size of possible extension queue 227. Compared 30540 event pairs, 65 based on Foata normal form. 1/3403 useless extension candidates. Maximal degree in co-relation 27390. Up to 1333 conditions per place. [2022-07-12 10:38:47,630 INFO L132 encePairwiseOnDemand]: 71/86 looper letters, 469 selfloop transitions, 870 changer transitions 6/1386 dead transitions. [2022-07-12 10:38:47,630 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 614 places, 1386 transitions, 29401 flow [2022-07-12 10:38:47,630 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2022-07-12 10:38:47,630 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 51 states. [2022-07-12 10:38:47,631 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 2809 transitions. [2022-07-12 10:38:47,632 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.6404468764249887 [2022-07-12 10:38:47,632 INFO L72 ComplementDD]: Start complementDD. Operand 51 states and 2809 transitions. [2022-07-12 10:38:47,632 INFO L73 IsDeterministic]: Start isDeterministic. Operand 51 states and 2809 transitions. [2022-07-12 10:38:47,633 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-12 10:38:47,633 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 51 states and 2809 transitions. [2022-07-12 10:38:47,635 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 52 states, 51 states have (on average 55.07843137254902) internal successors, (2809), 51 states have internal predecessors, (2809), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:38:47,639 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 52 states, 52 states have (on average 86.0) internal successors, (4472), 52 states have internal predecessors, (4472), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:38:47,640 INFO L81 ComplementDD]: Finished complementDD. Result has 52 states, 52 states have (on average 86.0) internal successors, (4472), 52 states have internal predecessors, (4472), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:38:47,640 INFO L186 Difference]: Start difference. First operand has 567 places, 1256 transitions, 24144 flow. Second operand 51 states and 2809 transitions. [2022-07-12 10:38:47,640 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 614 places, 1386 transitions, 29401 flow [2022-07-12 10:38:48,230 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 605 places, 1386 transitions, 29251 flow, removed 56 selfloop flow, removed 9 redundant places. [2022-07-12 10:38:48,253 INFO L242 Difference]: Finished difference. Result has 617 places, 1314 transitions, 27516 flow [2022-07-12 10:38:48,255 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=86, PETRI_DIFFERENCE_MINUEND_FLOW=24014, PETRI_DIFFERENCE_MINUEND_PLACES=555, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1256, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=814, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=429, PETRI_DIFFERENCE_SUBTRAHEND_STATES=51, PETRI_FLOW=27516, PETRI_PLACES=617, PETRI_TRANSITIONS=1314} [2022-07-12 10:38:48,255 INFO L279 CegarLoopForPetriNet]: 76 programPoint places, 541 predicate places. [2022-07-12 10:38:48,255 INFO L495 AbstractCegarLoop]: Abstraction has has 617 places, 1314 transitions, 27516 flow [2022-07-12 10:38:48,256 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 33 states have (on average 52.84848484848485) internal successors, (1744), 33 states have internal predecessors, (1744), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:38:48,256 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-12 10:38:48,256 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, 1, 1, 1, 1, 1, 1, 1] [2022-07-12 10:38:48,276 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2022-07-12 10:38:48,476 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,SelfDestructingSolverStorable12 [2022-07-12 10:38:48,476 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-12 10:38:48,476 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 10:38:48,476 INFO L85 PathProgramCache]: Analyzing trace with hash -499373303, now seen corresponding path program 11 times [2022-07-12 10:38:48,476 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 10:38:48,476 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1901481040] [2022-07-12 10:38:48,476 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 10:38:48,476 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 10:38:48,486 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 10:38:48,658 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 10:38:48,659 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 10:38:48,659 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1901481040] [2022-07-12 10:38:48,659 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1901481040] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-12 10:38:48,659 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1820891024] [2022-07-12 10:38:48,659 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-07-12 10:38:48,659 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 10:38:48,659 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-12 10:38:48,661 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) [2022-07-12 10:38:48,662 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2022-07-12 10:38:48,704 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-07-12 10:38:48,705 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-12 10:38:48,705 INFO L263 TraceCheckSpWp]: Trace formula consists of 155 conjuncts, 20 conjunts are in the unsatisfiable core [2022-07-12 10:38:48,706 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-12 10:38:48,985 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 10:38:48,985 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-12 10:38:49,285 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 10:38:49,286 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1820891024] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-12 10:38:49,286 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-12 10:38:49,286 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15, 15] total 33 [2022-07-12 10:38:49,286 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2109206695] [2022-07-12 10:38:49,286 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-12 10:38:49,286 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2022-07-12 10:38:49,286 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 10:38:49,287 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2022-07-12 10:38:49,287 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=162, Invalid=894, Unknown=0, NotChecked=0, Total=1056 [2022-07-12 10:38:49,288 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 51 out of 86 [2022-07-12 10:38:49,289 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 617 places, 1314 transitions, 27516 flow. Second operand has 33 states, 33 states have (on average 52.81818181818182) internal successors, (1743), 33 states have internal predecessors, (1743), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:38:49,289 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-12 10:38:49,289 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 51 of 86 [2022-07-12 10:38:49,289 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-12 10:38:52,212 INFO L129 PetriNetUnfolder]: 1090/3540 cut-off events. [2022-07-12 10:38:52,212 INFO L130 PetriNetUnfolder]: For 100524/100524 co-relation queries the response was YES. [2022-07-12 10:38:52,246 INFO L84 FinitePrefix]: Finished finitePrefix Result has 30602 conditions, 3540 events. 1090/3540 cut-off events. For 100524/100524 co-relation queries the response was YES. Maximal size of possible extension queue 242. Compared 32151 event pairs, 71 based on Foata normal form. 2/3532 useless extension candidates. Maximal degree in co-relation 30462. Up to 1496 conditions per place. [2022-07-12 10:38:52,267 INFO L132 encePairwiseOnDemand]: 71/86 looper letters, 591 selfloop transitions, 849 changer transitions 12/1493 dead transitions. [2022-07-12 10:38:52,267 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 665 places, 1493 transitions, 33976 flow [2022-07-12 10:38:52,268 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 52 states. [2022-07-12 10:38:52,268 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 52 states. [2022-07-12 10:38:52,269 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 2845 transitions. [2022-07-12 10:38:52,270 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.636180679785331 [2022-07-12 10:38:52,270 INFO L72 ComplementDD]: Start complementDD. Operand 52 states and 2845 transitions. [2022-07-12 10:38:52,270 INFO L73 IsDeterministic]: Start isDeterministic. Operand 52 states and 2845 transitions. [2022-07-12 10:38:52,271 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-12 10:38:52,271 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 52 states and 2845 transitions. [2022-07-12 10:38:52,274 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 53 states, 52 states have (on average 54.71153846153846) internal successors, (2845), 52 states have internal predecessors, (2845), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:38:52,276 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 53 states, 53 states have (on average 86.0) internal successors, (4558), 53 states have internal predecessors, (4558), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:38:52,276 INFO L81 ComplementDD]: Finished complementDD. Result has 53 states, 53 states have (on average 86.0) internal successors, (4558), 53 states have internal predecessors, (4558), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:38:52,277 INFO L186 Difference]: Start difference. First operand has 617 places, 1314 transitions, 27516 flow. Second operand 52 states and 2845 transitions. [2022-07-12 10:38:52,277 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 665 places, 1493 transitions, 33976 flow [2022-07-12 10:38:53,101 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 635 places, 1493 transitions, 33404 flow, removed 120 selfloop flow, removed 30 redundant places. [2022-07-12 10:38:53,128 INFO L242 Difference]: Finished difference. Result has 653 places, 1414 transitions, 32136 flow [2022-07-12 10:38:53,129 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=86, PETRI_DIFFERENCE_MINUEND_FLOW=26987, PETRI_DIFFERENCE_MINUEND_PLACES=584, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1314, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=755, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=531, PETRI_DIFFERENCE_SUBTRAHEND_STATES=52, PETRI_FLOW=32136, PETRI_PLACES=653, PETRI_TRANSITIONS=1414} [2022-07-12 10:38:53,130 INFO L279 CegarLoopForPetriNet]: 76 programPoint places, 577 predicate places. [2022-07-12 10:38:53,130 INFO L495 AbstractCegarLoop]: Abstraction has has 653 places, 1414 transitions, 32136 flow [2022-07-12 10:38:53,131 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 33 states have (on average 52.81818181818182) internal successors, (1743), 33 states have internal predecessors, (1743), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:38:53,131 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-12 10:38:53,131 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, 1, 1, 1, 1, 1, 1, 1] [2022-07-12 10:38:53,147 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2022-07-12 10:38:53,347 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,SelfDestructingSolverStorable13 [2022-07-12 10:38:53,347 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-12 10:38:53,347 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 10:38:53,348 INFO L85 PathProgramCache]: Analyzing trace with hash -1679895921, now seen corresponding path program 12 times [2022-07-12 10:38:53,348 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 10:38:53,348 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [661596554] [2022-07-12 10:38:53,348 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 10:38:53,348 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 10:38:53,358 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 10:38:53,521 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 10:38:53,521 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 10:38:53,521 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [661596554] [2022-07-12 10:38:53,521 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [661596554] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-12 10:38:53,521 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [707164598] [2022-07-12 10:38:53,521 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-07-12 10:38:53,521 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 10:38:53,522 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-12 10:38:53,523 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) [2022-07-12 10:38:53,540 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2022-07-12 10:38:53,573 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2022-07-12 10:38:53,573 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-12 10:38:53,574 INFO L263 TraceCheckSpWp]: Trace formula consists of 155 conjuncts, 20 conjunts are in the unsatisfiable core [2022-07-12 10:38:53,575 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-12 10:38:53,868 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 10:38:53,868 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-12 10:38:54,187 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 10:38:54,187 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [707164598] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-12 10:38:54,187 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-12 10:38:54,187 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15, 15] total 33 [2022-07-12 10:38:54,187 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2016516281] [2022-07-12 10:38:54,187 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-12 10:38:54,193 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2022-07-12 10:38:54,193 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 10:38:54,193 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2022-07-12 10:38:54,194 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=169, Invalid=887, Unknown=0, NotChecked=0, Total=1056 [2022-07-12 10:38:54,195 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 51 out of 86 [2022-07-12 10:38:54,196 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 653 places, 1414 transitions, 32136 flow. Second operand has 33 states, 33 states have (on average 52.84848484848485) internal successors, (1744), 33 states have internal predecessors, (1744), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:38:54,196 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-12 10:38:54,196 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 51 of 86 [2022-07-12 10:38:54,196 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-12 10:38:56,985 INFO L129 PetriNetUnfolder]: 1090/3513 cut-off events. [2022-07-12 10:38:56,985 INFO L130 PetriNetUnfolder]: For 112870/112870 co-relation queries the response was YES. [2022-07-12 10:38:57,016 INFO L84 FinitePrefix]: Finished finitePrefix Result has 32702 conditions, 3513 events. 1090/3513 cut-off events. For 112870/112870 co-relation queries the response was YES. Maximal size of possible extension queue 239. Compared 31753 event pairs, 77 based on Foata normal form. 1/3508 useless extension candidates. Maximal degree in co-relation 32547. Up to 1290 conditions per place. [2022-07-12 10:38:57,035 INFO L132 encePairwiseOnDemand]: 70/86 looper letters, 619 selfloop transitions, 818 changer transitions 8/1486 dead transitions. [2022-07-12 10:38:57,036 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 695 places, 1486 transitions, 36282 flow [2022-07-12 10:38:57,036 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2022-07-12 10:38:57,036 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 49 states. [2022-07-12 10:38:57,037 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 2688 transitions. [2022-07-12 10:38:57,038 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.6378737541528239 [2022-07-12 10:38:57,038 INFO L72 ComplementDD]: Start complementDD. Operand 49 states and 2688 transitions. [2022-07-12 10:38:57,038 INFO L73 IsDeterministic]: Start isDeterministic. Operand 49 states and 2688 transitions. [2022-07-12 10:38:57,038 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-12 10:38:57,038 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 49 states and 2688 transitions. [2022-07-12 10:38:57,040 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 50 states, 49 states have (on average 54.857142857142854) internal successors, (2688), 49 states have internal predecessors, (2688), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:38:57,042 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 50 states, 50 states have (on average 86.0) internal successors, (4300), 50 states have internal predecessors, (4300), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:38:57,043 INFO L81 ComplementDD]: Finished complementDD. Result has 50 states, 50 states have (on average 86.0) internal successors, (4300), 50 states have internal predecessors, (4300), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:38:57,043 INFO L186 Difference]: Start difference. First operand has 653 places, 1414 transitions, 32136 flow. Second operand 49 states and 2688 transitions. [2022-07-12 10:38:57,043 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 695 places, 1486 transitions, 36282 flow [2022-07-12 10:38:58,092 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 669 places, 1486 transitions, 35686 flow, removed 121 selfloop flow, removed 26 redundant places. [2022-07-12 10:38:58,120 INFO L242 Difference]: Finished difference. Result has 675 places, 1420 transitions, 33451 flow [2022-07-12 10:38:58,121 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=86, PETRI_DIFFERENCE_MINUEND_FLOW=31572, PETRI_DIFFERENCE_MINUEND_PLACES=621, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1414, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=811, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=598, PETRI_DIFFERENCE_SUBTRAHEND_STATES=49, PETRI_FLOW=33451, PETRI_PLACES=675, PETRI_TRANSITIONS=1420} [2022-07-12 10:38:58,121 INFO L279 CegarLoopForPetriNet]: 76 programPoint places, 599 predicate places. [2022-07-12 10:38:58,122 INFO L495 AbstractCegarLoop]: Abstraction has has 675 places, 1420 transitions, 33451 flow [2022-07-12 10:38:58,122 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 33 states have (on average 52.84848484848485) internal successors, (1744), 33 states have internal predecessors, (1744), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:38:58,122 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-12 10:38:58,122 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, 1, 1, 1, 1, 1, 1, 1] [2022-07-12 10:38:58,138 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2022-07-12 10:38:58,322 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,SelfDestructingSolverStorable14 [2022-07-12 10:38:58,323 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-12 10:38:58,323 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 10:38:58,323 INFO L85 PathProgramCache]: Analyzing trace with hash 927311605, now seen corresponding path program 13 times [2022-07-12 10:38:58,323 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 10:38:58,323 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [636353190] [2022-07-12 10:38:58,324 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 10:38:58,324 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 10:38:58,334 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 10:38:58,484 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 10:38:58,485 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 10:38:58,485 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [636353190] [2022-07-12 10:38:58,485 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [636353190] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-12 10:38:58,485 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1812398124] [2022-07-12 10:38:58,485 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-07-12 10:38:58,485 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 10:38:58,485 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-12 10:38:58,490 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) [2022-07-12 10:38:58,491 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2022-07-12 10:38:58,534 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 10:38:58,535 INFO L263 TraceCheckSpWp]: Trace formula consists of 155 conjuncts, 20 conjunts are in the unsatisfiable core [2022-07-12 10:38:58,537 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-12 10:38:58,816 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 10:38:58,816 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-12 10:38:59,114 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 10:38:59,114 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1812398124] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-12 10:38:59,114 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-12 10:38:59,115 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15, 15] total 33 [2022-07-12 10:38:59,115 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [264209191] [2022-07-12 10:38:59,115 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-12 10:38:59,115 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2022-07-12 10:38:59,115 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 10:38:59,115 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2022-07-12 10:38:59,116 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=173, Invalid=883, Unknown=0, NotChecked=0, Total=1056 [2022-07-12 10:38:59,116 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 51 out of 86 [2022-07-12 10:38:59,117 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 675 places, 1420 transitions, 33451 flow. Second operand has 33 states, 33 states have (on average 52.81818181818182) internal successors, (1743), 33 states have internal predecessors, (1743), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:38:59,117 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-12 10:38:59,117 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 51 of 86 [2022-07-12 10:38:59,117 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-12 10:39:02,751 INFO L129 PetriNetUnfolder]: 1124/3638 cut-off events. [2022-07-12 10:39:02,751 INFO L130 PetriNetUnfolder]: For 121515/121515 co-relation queries the response was YES. [2022-07-12 10:39:02,787 INFO L84 FinitePrefix]: Finished finitePrefix Result has 34747 conditions, 3638 events. 1124/3638 cut-off events. For 121515/121515 co-relation queries the response was YES. Maximal size of possible extension queue 251. Compared 33167 event pairs, 67 based on Foata normal form. 1/3633 useless extension candidates. Maximal degree in co-relation 34594. Up to 1403 conditions per place. [2022-07-12 10:39:02,808 INFO L132 encePairwiseOnDemand]: 71/86 looper letters, 521 selfloop transitions, 1006 changer transitions 6/1574 dead transitions. [2022-07-12 10:39:02,808 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 727 places, 1574 transitions, 39871 flow [2022-07-12 10:39:02,808 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 58 states. [2022-07-12 10:39:02,808 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 58 states. [2022-07-12 10:39:02,809 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 3189 transitions. [2022-07-12 10:39:02,810 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.6393344025661588 [2022-07-12 10:39:02,810 INFO L72 ComplementDD]: Start complementDD. Operand 58 states and 3189 transitions. [2022-07-12 10:39:02,810 INFO L73 IsDeterministic]: Start isDeterministic. Operand 58 states and 3189 transitions. [2022-07-12 10:39:02,811 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-12 10:39:02,811 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 58 states and 3189 transitions. [2022-07-12 10:39:02,813 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 59 states, 58 states have (on average 54.98275862068966) internal successors, (3189), 58 states have internal predecessors, (3189), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:39:02,816 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 59 states, 59 states have (on average 86.0) internal successors, (5074), 59 states have internal predecessors, (5074), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:39:02,816 INFO L81 ComplementDD]: Finished complementDD. Result has 59 states, 59 states have (on average 86.0) internal successors, (5074), 59 states have internal predecessors, (5074), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:39:02,816 INFO L186 Difference]: Start difference. First operand has 675 places, 1420 transitions, 33451 flow. Second operand 58 states and 3189 transitions. [2022-07-12 10:39:02,816 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 727 places, 1574 transitions, 39871 flow [2022-07-12 10:39:03,938 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 692 places, 1574 transitions, 39285 flow, removed 47 selfloop flow, removed 35 redundant places. [2022-07-12 10:39:03,968 INFO L242 Difference]: Finished difference. Result has 708 places, 1488 transitions, 37088 flow [2022-07-12 10:39:03,969 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=86, PETRI_DIFFERENCE_MINUEND_FLOW=32947, PETRI_DIFFERENCE_MINUEND_PLACES=635, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1420, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=939, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=464, PETRI_DIFFERENCE_SUBTRAHEND_STATES=58, PETRI_FLOW=37088, PETRI_PLACES=708, PETRI_TRANSITIONS=1488} [2022-07-12 10:39:03,970 INFO L279 CegarLoopForPetriNet]: 76 programPoint places, 632 predicate places. [2022-07-12 10:39:03,970 INFO L495 AbstractCegarLoop]: Abstraction has has 708 places, 1488 transitions, 37088 flow [2022-07-12 10:39:03,970 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 33 states have (on average 52.81818181818182) internal successors, (1743), 33 states have internal predecessors, (1743), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:39:03,970 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-12 10:39:03,970 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, 1, 1, 1, 1, 1, 1, 1] [2022-07-12 10:39:03,986 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Ended with exit code 0 [2022-07-12 10:39:04,183 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,SelfDestructingSolverStorable15 [2022-07-12 10:39:04,183 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-12 10:39:04,184 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 10:39:04,184 INFO L85 PathProgramCache]: Analyzing trace with hash 1524161261, now seen corresponding path program 14 times [2022-07-12 10:39:04,184 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 10:39:04,184 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [237031153] [2022-07-12 10:39:04,184 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 10:39:04,184 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 10:39:04,198 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 10:39:04,361 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 10:39:04,361 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 10:39:04,361 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [237031153] [2022-07-12 10:39:04,361 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [237031153] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-12 10:39:04,361 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [297575530] [2022-07-12 10:39:04,362 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-07-12 10:39:04,362 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 10:39:04,362 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-12 10:39:04,363 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) [2022-07-12 10:39:04,363 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2022-07-12 10:39:04,408 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-07-12 10:39:04,409 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-12 10:39:04,410 INFO L263 TraceCheckSpWp]: Trace formula consists of 155 conjuncts, 20 conjunts are in the unsatisfiable core [2022-07-12 10:39:04,411 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-12 10:39:04,693 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 10:39:04,693 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-12 10:39:05,027 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 10:39:05,028 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [297575530] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-12 10:39:05,028 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-12 10:39:05,028 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15, 15] total 33 [2022-07-12 10:39:05,028 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1587969169] [2022-07-12 10:39:05,028 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-12 10:39:05,028 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2022-07-12 10:39:05,028 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 10:39:05,029 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2022-07-12 10:39:05,029 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=193, Invalid=863, Unknown=0, NotChecked=0, Total=1056 [2022-07-12 10:39:05,030 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 51 out of 86 [2022-07-12 10:39:05,030 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 708 places, 1488 transitions, 37088 flow. Second operand has 33 states, 33 states have (on average 52.84848484848485) internal successors, (1744), 33 states have internal predecessors, (1744), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:39:05,030 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-12 10:39:05,030 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 51 of 86 [2022-07-12 10:39:05,031 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-12 10:39:07,692 INFO L129 PetriNetUnfolder]: 1151/3716 cut-off events. [2022-07-12 10:39:07,692 INFO L130 PetriNetUnfolder]: For 138497/138497 co-relation queries the response was YES. [2022-07-12 10:39:07,737 INFO L84 FinitePrefix]: Finished finitePrefix Result has 37388 conditions, 3716 events. 1151/3716 cut-off events. For 138497/138497 co-relation queries the response was YES. Maximal size of possible extension queue 261. Compared 34126 event pairs, 76 based on Foata normal form. 1/3708 useless extension candidates. Maximal degree in co-relation 37226. Up to 1366 conditions per place. [2022-07-12 10:39:07,762 INFO L132 encePairwiseOnDemand]: 70/86 looper letters, 700 selfloop transitions, 872 changer transitions 8/1621 dead transitions. [2022-07-12 10:39:07,763 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 744 places, 1621 transitions, 43426 flow [2022-07-12 10:39:07,763 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2022-07-12 10:39:07,763 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 40 states. [2022-07-12 10:39:07,764 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 2212 transitions. [2022-07-12 10:39:07,765 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.6430232558139535 [2022-07-12 10:39:07,765 INFO L72 ComplementDD]: Start complementDD. Operand 40 states and 2212 transitions. [2022-07-12 10:39:07,765 INFO L73 IsDeterministic]: Start isDeterministic. Operand 40 states and 2212 transitions. [2022-07-12 10:39:07,765 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-12 10:39:07,765 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 40 states and 2212 transitions. [2022-07-12 10:39:07,767 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 41 states, 40 states have (on average 55.3) internal successors, (2212), 40 states have internal predecessors, (2212), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:39:07,769 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 41 states, 41 states have (on average 86.0) internal successors, (3526), 41 states have internal predecessors, (3526), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:39:07,769 INFO L81 ComplementDD]: Finished complementDD. Result has 41 states, 41 states have (on average 86.0) internal successors, (3526), 41 states have internal predecessors, (3526), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:39:07,769 INFO L186 Difference]: Start difference. First operand has 708 places, 1488 transitions, 37088 flow. Second operand 40 states and 2212 transitions. [2022-07-12 10:39:07,769 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 744 places, 1621 transitions, 43426 flow [2022-07-12 10:39:08,962 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 718 places, 1621 transitions, 41918 flow, removed 297 selfloop flow, removed 26 redundant places. [2022-07-12 10:39:08,994 INFO L242 Difference]: Finished difference. Result has 728 places, 1534 transitions, 40174 flow [2022-07-12 10:39:08,995 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=86, PETRI_DIFFERENCE_MINUEND_FLOW=35831, PETRI_DIFFERENCE_MINUEND_PLACES=679, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1488, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=827, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=644, PETRI_DIFFERENCE_SUBTRAHEND_STATES=40, PETRI_FLOW=40174, PETRI_PLACES=728, PETRI_TRANSITIONS=1534} [2022-07-12 10:39:08,995 INFO L279 CegarLoopForPetriNet]: 76 programPoint places, 652 predicate places. [2022-07-12 10:39:08,995 INFO L495 AbstractCegarLoop]: Abstraction has has 728 places, 1534 transitions, 40174 flow [2022-07-12 10:39:08,995 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 33 states have (on average 52.84848484848485) internal successors, (1744), 33 states have internal predecessors, (1744), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:39:08,995 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-12 10:39:08,995 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, 1, 1, 1, 1, 1, 1, 1] [2022-07-12 10:39:09,011 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2022-07-12 10:39:09,196 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16,15 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 10:39:09,196 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-12 10:39:09,196 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 10:39:09,197 INFO L85 PathProgramCache]: Analyzing trace with hash -1446911885, now seen corresponding path program 15 times [2022-07-12 10:39:09,197 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 10:39:09,197 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [945997443] [2022-07-12 10:39:09,197 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 10:39:09,197 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 10:39:09,211 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 10:39:09,377 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 10:39:09,377 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 10:39:09,377 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [945997443] [2022-07-12 10:39:09,377 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [945997443] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-12 10:39:09,377 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1093690489] [2022-07-12 10:39:09,377 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-07-12 10:39:09,377 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 10:39:09,377 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-12 10:39:09,379 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) [2022-07-12 10:39:09,380 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2022-07-12 10:39:09,429 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-07-12 10:39:09,430 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-12 10:39:09,431 INFO L263 TraceCheckSpWp]: Trace formula consists of 155 conjuncts, 20 conjunts are in the unsatisfiable core [2022-07-12 10:39:09,432 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-12 10:39:09,716 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 10:39:09,716 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-12 10:39:10,114 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 10:39:10,115 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1093690489] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-12 10:39:10,115 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-12 10:39:10,115 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15, 15] total 33 [2022-07-12 10:39:10,115 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [644200847] [2022-07-12 10:39:10,115 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-12 10:39:10,115 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2022-07-12 10:39:10,115 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 10:39:10,116 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2022-07-12 10:39:10,116 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=176, Invalid=880, Unknown=0, NotChecked=0, Total=1056 [2022-07-12 10:39:10,116 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 51 out of 86 [2022-07-12 10:39:10,117 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 728 places, 1534 transitions, 40174 flow. Second operand has 33 states, 33 states have (on average 52.84848484848485) internal successors, (1744), 33 states have internal predecessors, (1744), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:39:10,117 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-12 10:39:10,117 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 51 of 86 [2022-07-12 10:39:10,117 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-12 10:39:12,809 INFO L129 PetriNetUnfolder]: 1150/3701 cut-off events. [2022-07-12 10:39:12,809 INFO L130 PetriNetUnfolder]: For 144718/144728 co-relation queries the response was YES. [2022-07-12 10:39:12,852 INFO L84 FinitePrefix]: Finished finitePrefix Result has 38568 conditions, 3701 events. 1150/3701 cut-off events. For 144718/144728 co-relation queries the response was YES. Maximal size of possible extension queue 259. Compared 33898 event pairs, 84 based on Foata normal form. 3/3696 useless extension candidates. Maximal degree in co-relation 38399. Up to 1325 conditions per place. [2022-07-12 10:39:12,877 INFO L132 encePairwiseOnDemand]: 70/86 looper letters, 668 selfloop transitions, 887 changer transitions 8/1604 dead transitions. [2022-07-12 10:39:12,877 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 767 places, 1604 transitions, 44622 flow [2022-07-12 10:39:12,878 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2022-07-12 10:39:12,878 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 43 states. [2022-07-12 10:39:12,879 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 2370 transitions. [2022-07-12 10:39:12,879 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.6408869659275284 [2022-07-12 10:39:12,879 INFO L72 ComplementDD]: Start complementDD. Operand 43 states and 2370 transitions. [2022-07-12 10:39:12,879 INFO L73 IsDeterministic]: Start isDeterministic. Operand 43 states and 2370 transitions. [2022-07-12 10:39:12,880 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-12 10:39:12,880 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 43 states and 2370 transitions. [2022-07-12 10:39:12,882 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 44 states, 43 states have (on average 55.116279069767444) internal successors, (2370), 43 states have internal predecessors, (2370), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:39:12,883 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 44 states, 44 states have (on average 86.0) internal successors, (3784), 44 states have internal predecessors, (3784), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:39:12,884 INFO L81 ComplementDD]: Finished complementDD. Result has 44 states, 44 states have (on average 86.0) internal successors, (3784), 44 states have internal predecessors, (3784), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:39:12,884 INFO L186 Difference]: Start difference. First operand has 728 places, 1534 transitions, 40174 flow. Second operand 43 states and 2370 transitions. [2022-07-12 10:39:12,884 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 767 places, 1604 transitions, 44622 flow [2022-07-12 10:39:14,223 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 743 places, 1604 transitions, 44074 flow, removed 39 selfloop flow, removed 24 redundant places. [2022-07-12 10:39:14,257 INFO L242 Difference]: Finished difference. Result has 747 places, 1536 transitions, 41560 flow [2022-07-12 10:39:14,258 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=86, PETRI_DIFFERENCE_MINUEND_FLOW=39650, PETRI_DIFFERENCE_MINUEND_PLACES=701, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1534, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=883, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=648, PETRI_DIFFERENCE_SUBTRAHEND_STATES=43, PETRI_FLOW=41560, PETRI_PLACES=747, PETRI_TRANSITIONS=1536} [2022-07-12 10:39:14,259 INFO L279 CegarLoopForPetriNet]: 76 programPoint places, 671 predicate places. [2022-07-12 10:39:14,259 INFO L495 AbstractCegarLoop]: Abstraction has has 747 places, 1536 transitions, 41560 flow [2022-07-12 10:39:14,259 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 33 states have (on average 52.84848484848485) internal successors, (1744), 33 states have internal predecessors, (1744), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:39:14,259 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-12 10:39:14,259 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, 1, 1, 1, 1, 1, 1, 1] [2022-07-12 10:39:14,276 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2022-07-12 10:39:14,460 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2022-07-12 10:39:14,460 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-12 10:39:14,460 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 10:39:14,460 INFO L85 PathProgramCache]: Analyzing trace with hash -929958727, now seen corresponding path program 16 times [2022-07-12 10:39:14,461 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 10:39:14,461 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [671515788] [2022-07-12 10:39:14,461 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 10:39:14,461 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 10:39:14,468 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 10:39:14,499 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 10:39:14,499 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 10:39:14,499 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [671515788] [2022-07-12 10:39:14,499 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [671515788] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-12 10:39:14,499 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1216466363] [2022-07-12 10:39:14,499 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-07-12 10:39:14,499 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 10:39:14,500 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-12 10:39:14,500 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) [2022-07-12 10:39:14,505 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2022-07-12 10:39:14,549 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-07-12 10:39:14,549 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-12 10:39:14,550 INFO L263 TraceCheckSpWp]: Trace formula consists of 135 conjuncts, 4 conjunts are in the unsatisfiable core [2022-07-12 10:39:14,551 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-12 10:39:14,599 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 10:39:14,599 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-12 10:39:14,679 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 10:39:14,679 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1216466363] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-12 10:39:14,679 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-12 10:39:14,679 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 8 [2022-07-12 10:39:14,680 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1939921759] [2022-07-12 10:39:14,680 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-12 10:39:14,680 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-07-12 10:39:14,680 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 10:39:14,680 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-07-12 10:39:14,680 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2022-07-12 10:39:14,681 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 67 out of 86 [2022-07-12 10:39:14,681 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 747 places, 1536 transitions, 41560 flow. Second operand has 8 states, 8 states have (on average 70.0) internal successors, (560), 8 states have internal predecessors, (560), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:39:14,681 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-12 10:39:14,681 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 67 of 86 [2022-07-12 10:39:14,681 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-12 10:39:16,035 INFO L129 PetriNetUnfolder]: 1069/3417 cut-off events. [2022-07-12 10:39:16,035 INFO L130 PetriNetUnfolder]: For 141639/141786 co-relation queries the response was YES. [2022-07-12 10:39:16,075 INFO L84 FinitePrefix]: Finished finitePrefix Result has 35802 conditions, 3417 events. 1069/3417 cut-off events. For 141639/141786 co-relation queries the response was YES. Maximal size of possible extension queue 246. Compared 30981 event pairs, 57 based on Foata normal form. 45/3447 useless extension candidates. Maximal degree in co-relation 35633. Up to 1010 conditions per place. [2022-07-12 10:39:16,096 INFO L132 encePairwiseOnDemand]: 81/86 looper letters, 412 selfloop transitions, 552 changer transitions 0/1522 dead transitions. [2022-07-12 10:39:16,096 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 716 places, 1522 transitions, 43430 flow [2022-07-12 10:39:16,096 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-07-12 10:39:16,096 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2022-07-12 10:39:16,096 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 361 transitions. [2022-07-12 10:39:16,097 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.8395348837209302 [2022-07-12 10:39:16,097 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 361 transitions. [2022-07-12 10:39:16,097 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 361 transitions. [2022-07-12 10:39:16,097 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-12 10:39:16,097 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 361 transitions. [2022-07-12 10:39:16,097 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 72.2) internal successors, (361), 5 states have internal predecessors, (361), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:39:16,097 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 86.0) internal successors, (516), 6 states have internal predecessors, (516), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:39:16,098 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 86.0) internal successors, (516), 6 states have internal predecessors, (516), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:39:16,098 INFO L186 Difference]: Start difference. First operand has 747 places, 1536 transitions, 41560 flow. Second operand 5 states and 361 transitions. [2022-07-12 10:39:16,098 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 716 places, 1522 transitions, 43430 flow [2022-07-12 10:39:17,268 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 689 places, 1522 transitions, 43044 flow, removed 47 selfloop flow, removed 27 redundant places. [2022-07-12 10:39:17,299 INFO L242 Difference]: Finished difference. Result has 691 places, 1514 transitions, 43095 flow [2022-07-12 10:39:17,300 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=86, PETRI_DIFFERENCE_MINUEND_FLOW=40325, PETRI_DIFFERENCE_MINUEND_PLACES=685, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1496, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=534, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=944, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=43095, PETRI_PLACES=691, PETRI_TRANSITIONS=1514} [2022-07-12 10:39:17,300 INFO L279 CegarLoopForPetriNet]: 76 programPoint places, 615 predicate places. [2022-07-12 10:39:17,300 INFO L495 AbstractCegarLoop]: Abstraction has has 691 places, 1514 transitions, 43095 flow [2022-07-12 10:39:17,301 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 70.0) internal successors, (560), 8 states have internal predecessors, (560), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:39:17,301 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-12 10:39:17,301 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, 1, 1, 1, 1, 1, 1, 1] [2022-07-12 10:39:17,317 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2022-07-12 10:39:17,505 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,17 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 10:39:17,506 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-12 10:39:17,506 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 10:39:17,506 INFO L85 PathProgramCache]: Analyzing trace with hash 995476421, now seen corresponding path program 17 times [2022-07-12 10:39:17,506 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 10:39:17,506 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [750366418] [2022-07-12 10:39:17,506 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 10:39:17,506 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 10:39:17,515 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 10:39:17,655 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 10:39:17,655 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 10:39:17,656 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [750366418] [2022-07-12 10:39:17,656 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [750366418] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-12 10:39:17,656 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1643517115] [2022-07-12 10:39:17,656 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-07-12 10:39:17,656 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 10:39:17,656 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-12 10:39:17,657 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) [2022-07-12 10:39:17,658 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2022-07-12 10:39:17,703 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-07-12 10:39:17,703 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-12 10:39:17,703 INFO L263 TraceCheckSpWp]: Trace formula consists of 155 conjuncts, 20 conjunts are in the unsatisfiable core [2022-07-12 10:39:17,704 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-12 10:39:18,008 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 10:39:18,008 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-12 10:39:18,369 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 10:39:18,370 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1643517115] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-12 10:39:18,370 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-12 10:39:18,370 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15, 15] total 31 [2022-07-12 10:39:18,370 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [830316507] [2022-07-12 10:39:18,370 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-12 10:39:18,370 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2022-07-12 10:39:18,370 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 10:39:18,370 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2022-07-12 10:39:18,371 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=147, Invalid=783, Unknown=0, NotChecked=0, Total=930 [2022-07-12 10:39:18,371 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 51 out of 86 [2022-07-12 10:39:18,372 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 691 places, 1514 transitions, 43095 flow. Second operand has 31 states, 31 states have (on average 52.903225806451616) internal successors, (1640), 31 states have internal predecessors, (1640), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:39:18,372 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-12 10:39:18,372 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 51 of 86 [2022-07-12 10:39:18,372 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-12 10:39:21,798 INFO L129 PetriNetUnfolder]: 1406/4370 cut-off events. [2022-07-12 10:39:21,798 INFO L130 PetriNetUnfolder]: For 194607/194607 co-relation queries the response was YES. [2022-07-12 10:39:21,850 INFO L84 FinitePrefix]: Finished finitePrefix Result has 49433 conditions, 4370 events. 1406/4370 cut-off events. For 194607/194607 co-relation queries the response was YES. Maximal size of possible extension queue 329. Compared 41410 event pairs, 76 based on Foata normal form. 5/4367 useless extension candidates. Maximal degree in co-relation 49271. Up to 1755 conditions per place. [2022-07-12 10:39:21,888 INFO L132 encePairwiseOnDemand]: 70/86 looper letters, 809 selfloop transitions, 1127 changer transitions 32/2009 dead transitions. [2022-07-12 10:39:21,889 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 739 places, 2009 transitions, 61491 flow [2022-07-12 10:39:21,889 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2022-07-12 10:39:21,889 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 49 states. [2022-07-12 10:39:21,890 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 2703 transitions. [2022-07-12 10:39:21,891 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.6414333175130518 [2022-07-12 10:39:21,891 INFO L72 ComplementDD]: Start complementDD. Operand 49 states and 2703 transitions. [2022-07-12 10:39:21,891 INFO L73 IsDeterministic]: Start isDeterministic. Operand 49 states and 2703 transitions. [2022-07-12 10:39:21,892 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-12 10:39:21,892 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 49 states and 2703 transitions. [2022-07-12 10:39:21,894 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 50 states, 49 states have (on average 55.16326530612245) internal successors, (2703), 49 states have internal predecessors, (2703), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:39:21,896 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 50 states, 50 states have (on average 86.0) internal successors, (4300), 50 states have internal predecessors, (4300), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:39:21,896 INFO L81 ComplementDD]: Finished complementDD. Result has 50 states, 50 states have (on average 86.0) internal successors, (4300), 50 states have internal predecessors, (4300), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:39:21,896 INFO L186 Difference]: Start difference. First operand has 691 places, 1514 transitions, 43095 flow. Second operand 49 states and 2703 transitions. [2022-07-12 10:39:21,897 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 739 places, 2009 transitions, 61491 flow [2022-07-12 10:39:23,588 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 737 places, 2009 transitions, 61258 flow, removed 106 selfloop flow, removed 2 redundant places. [2022-07-12 10:39:23,631 INFO L242 Difference]: Finished difference. Result has 773 places, 1870 transitions, 59331 flow [2022-07-12 10:39:23,632 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=86, PETRI_DIFFERENCE_MINUEND_FLOW=43050, PETRI_DIFFERENCE_MINUEND_PLACES=689, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1514, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=795, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=536, PETRI_DIFFERENCE_SUBTRAHEND_STATES=49, PETRI_FLOW=59331, PETRI_PLACES=773, PETRI_TRANSITIONS=1870} [2022-07-12 10:39:23,632 INFO L279 CegarLoopForPetriNet]: 76 programPoint places, 697 predicate places. [2022-07-12 10:39:23,633 INFO L495 AbstractCegarLoop]: Abstraction has has 773 places, 1870 transitions, 59331 flow [2022-07-12 10:39:23,633 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 31 states have (on average 52.903225806451616) internal successors, (1640), 31 states have internal predecessors, (1640), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:39:23,633 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-12 10:39:23,633 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, 1, 1, 1, 1, 1, 1, 1] [2022-07-12 10:39:23,650 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Forceful destruction successful, exit code 0 [2022-07-12 10:39:23,833 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,18 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 10:39:23,834 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-12 10:39:23,834 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 10:39:23,834 INFO L85 PathProgramCache]: Analyzing trace with hash -1420095517, now seen corresponding path program 18 times [2022-07-12 10:39:23,834 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 10:39:23,834 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1191754411] [2022-07-12 10:39:23,834 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 10:39:23,834 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 10:39:23,849 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 10:39:23,977 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 10:39:23,977 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 10:39:23,977 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1191754411] [2022-07-12 10:39:23,977 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1191754411] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-12 10:39:23,978 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [694541373] [2022-07-12 10:39:23,978 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-07-12 10:39:23,978 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 10:39:23,978 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-12 10:39:23,979 INFO L229 MonitoredProcess]: Starting monitored process 19 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-12 10:39:23,979 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2022-07-12 10:39:24,027 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2022-07-12 10:39:24,027 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-12 10:39:24,028 INFO L263 TraceCheckSpWp]: Trace formula consists of 155 conjuncts, 20 conjunts are in the unsatisfiable core [2022-07-12 10:39:24,028 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-12 10:39:24,265 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 10:39:24,266 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-12 10:39:24,572 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 10:39:24,572 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [694541373] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-12 10:39:24,572 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-12 10:39:24,572 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15, 15] total 32 [2022-07-12 10:39:24,573 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2130112916] [2022-07-12 10:39:24,573 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-12 10:39:24,573 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2022-07-12 10:39:24,573 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 10:39:24,573 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2022-07-12 10:39:24,573 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=158, Invalid=834, Unknown=0, NotChecked=0, Total=992 [2022-07-12 10:39:24,574 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 51 out of 86 [2022-07-12 10:39:24,575 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 773 places, 1870 transitions, 59331 flow. Second operand has 32 states, 32 states have (on average 52.875) internal successors, (1692), 32 states have internal predecessors, (1692), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:39:24,575 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-12 10:39:24,575 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 51 of 86 [2022-07-12 10:39:24,575 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-12 10:39:29,844 INFO L129 PetriNetUnfolder]: 1631/5089 cut-off events. [2022-07-12 10:39:29,844 INFO L130 PetriNetUnfolder]: For 259549/259561 co-relation queries the response was YES. [2022-07-12 10:39:29,908 INFO L84 FinitePrefix]: Finished finitePrefix Result has 62648 conditions, 5089 events. 1631/5089 cut-off events. For 259549/259561 co-relation queries the response was YES. Maximal size of possible extension queue 375. Compared 49827 event pairs, 90 based on Foata normal form. 11/5092 useless extension candidates. Maximal degree in co-relation 62450. Up to 1815 conditions per place. [2022-07-12 10:39:29,944 INFO L132 encePairwiseOnDemand]: 70/86 looper letters, 849 selfloop transitions, 1411 changer transitions 33/2334 dead transitions. [2022-07-12 10:39:29,944 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 827 places, 2334 transitions, 78344 flow [2022-07-12 10:39:29,945 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 65 states. [2022-07-12 10:39:29,945 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 65 states. [2022-07-12 10:39:29,946 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 65 states to 65 states and 3567 transitions. [2022-07-12 10:39:29,947 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.6381037567084079 [2022-07-12 10:39:29,947 INFO L72 ComplementDD]: Start complementDD. Operand 65 states and 3567 transitions. [2022-07-12 10:39:29,947 INFO L73 IsDeterministic]: Start isDeterministic. Operand 65 states and 3567 transitions. [2022-07-12 10:39:29,947 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-12 10:39:29,948 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 65 states and 3567 transitions. [2022-07-12 10:39:29,950 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 66 states, 65 states have (on average 54.87692307692308) internal successors, (3567), 65 states have internal predecessors, (3567), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:39:29,953 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 66 states, 66 states have (on average 86.0) internal successors, (5676), 66 states have internal predecessors, (5676), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:39:29,953 INFO L81 ComplementDD]: Finished complementDD. Result has 66 states, 66 states have (on average 86.0) internal successors, (5676), 66 states have internal predecessors, (5676), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:39:29,953 INFO L186 Difference]: Start difference. First operand has 773 places, 1870 transitions, 59331 flow. Second operand 65 states and 3567 transitions. [2022-07-12 10:39:29,953 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 827 places, 2334 transitions, 78344 flow [2022-07-12 10:39:32,438 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 815 places, 2334 transitions, 77815 flow, removed 258 selfloop flow, removed 12 redundant places. [2022-07-12 10:39:32,494 INFO L242 Difference]: Finished difference. Result has 848 places, 2191 transitions, 76007 flow [2022-07-12 10:39:32,496 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=86, PETRI_DIFFERENCE_MINUEND_FLOW=58949, PETRI_DIFFERENCE_MINUEND_PLACES=751, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1870, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1106, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=626, PETRI_DIFFERENCE_SUBTRAHEND_STATES=65, PETRI_FLOW=76007, PETRI_PLACES=848, PETRI_TRANSITIONS=2191} [2022-07-12 10:39:32,496 INFO L279 CegarLoopForPetriNet]: 76 programPoint places, 772 predicate places. [2022-07-12 10:39:32,496 INFO L495 AbstractCegarLoop]: Abstraction has has 848 places, 2191 transitions, 76007 flow [2022-07-12 10:39:32,496 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 32 states have (on average 52.875) internal successors, (1692), 32 states have internal predecessors, (1692), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:39:32,496 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-12 10:39:32,496 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, 1, 1, 1, 1, 1, 1, 1] [2022-07-12 10:39:32,514 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Forceful destruction successful, exit code 0 [2022-07-12 10:39:32,697 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,19 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 10:39:32,697 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-12 10:39:32,697 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 10:39:32,697 INFO L85 PathProgramCache]: Analyzing trace with hash 1159818561, now seen corresponding path program 19 times [2022-07-12 10:39:32,697 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 10:39:32,697 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1918367253] [2022-07-12 10:39:32,698 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 10:39:32,698 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 10:39:32,712 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 10:39:32,857 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 10:39:32,858 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 10:39:32,858 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1918367253] [2022-07-12 10:39:32,858 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1918367253] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-12 10:39:32,858 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1199951762] [2022-07-12 10:39:32,858 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-07-12 10:39:32,858 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 10:39:32,858 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-12 10:39:32,859 INFO L229 MonitoredProcess]: Starting monitored process 20 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-12 10:39:32,863 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2022-07-12 10:39:32,913 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 10:39:32,914 INFO L263 TraceCheckSpWp]: Trace formula consists of 155 conjuncts, 20 conjunts are in the unsatisfiable core [2022-07-12 10:39:32,914 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-12 10:39:33,143 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 10:39:33,144 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-12 10:39:33,470 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 10:39:33,470 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1199951762] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-12 10:39:33,470 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-12 10:39:33,470 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15, 15] total 32 [2022-07-12 10:39:33,470 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1136470003] [2022-07-12 10:39:33,470 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-12 10:39:33,471 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2022-07-12 10:39:33,471 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 10:39:33,471 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2022-07-12 10:39:33,472 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=160, Invalid=832, Unknown=0, NotChecked=0, Total=992 [2022-07-12 10:39:33,472 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 51 out of 86 [2022-07-12 10:39:33,473 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 848 places, 2191 transitions, 76007 flow. Second operand has 32 states, 32 states have (on average 52.875) internal successors, (1692), 32 states have internal predecessors, (1692), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:39:33,473 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-12 10:39:33,473 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 51 of 86 [2022-07-12 10:39:33,473 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-12 10:39:38,808 INFO L129 PetriNetUnfolder]: 1676/5310 cut-off events. [2022-07-12 10:39:38,809 INFO L130 PetriNetUnfolder]: For 334963/334968 co-relation queries the response was YES. [2022-07-12 10:39:38,890 INFO L84 FinitePrefix]: Finished finitePrefix Result has 69593 conditions, 5310 events. 1676/5310 cut-off events. For 334963/334968 co-relation queries the response was YES. Maximal size of possible extension queue 382. Compared 52591 event pairs, 81 based on Foata normal form. 6/5308 useless extension candidates. Maximal degree in co-relation 69372. Up to 1696 conditions per place. [2022-07-12 10:39:38,933 INFO L132 encePairwiseOnDemand]: 70/86 looper letters, 893 selfloop transitions, 1476 changer transitions 53/2463 dead transitions. [2022-07-12 10:39:38,933 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 898 places, 2463 transitions, 89191 flow [2022-07-12 10:39:38,933 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 61 states. [2022-07-12 10:39:38,934 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 61 states. [2022-07-12 10:39:38,935 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 3353 transitions. [2022-07-12 10:39:38,936 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.6391536408692337 [2022-07-12 10:39:38,936 INFO L72 ComplementDD]: Start complementDD. Operand 61 states and 3353 transitions. [2022-07-12 10:39:38,936 INFO L73 IsDeterministic]: Start isDeterministic. Operand 61 states and 3353 transitions. [2022-07-12 10:39:38,936 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-12 10:39:38,936 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 61 states and 3353 transitions. [2022-07-12 10:39:38,939 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 62 states, 61 states have (on average 54.967213114754095) internal successors, (3353), 61 states have internal predecessors, (3353), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:39:38,942 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 62 states, 62 states have (on average 86.0) internal successors, (5332), 62 states have internal predecessors, (5332), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:39:38,942 INFO L81 ComplementDD]: Finished complementDD. Result has 62 states, 62 states have (on average 86.0) internal successors, (5332), 62 states have internal predecessors, (5332), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:39:38,942 INFO L186 Difference]: Start difference. First operand has 848 places, 2191 transitions, 76007 flow. Second operand 61 states and 3353 transitions. [2022-07-12 10:39:38,942 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 898 places, 2463 transitions, 89191 flow [2022-07-12 10:39:42,398 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 886 places, 2463 transitions, 88209 flow, removed 443 selfloop flow, removed 12 redundant places. [2022-07-12 10:39:42,465 INFO L242 Difference]: Finished difference. Result has 908 places, 2297 transitions, 84757 flow [2022-07-12 10:39:42,467 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=86, PETRI_DIFFERENCE_MINUEND_FLOW=75207, PETRI_DIFFERENCE_MINUEND_PLACES=826, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=2191, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1352, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=776, PETRI_DIFFERENCE_SUBTRAHEND_STATES=61, PETRI_FLOW=84757, PETRI_PLACES=908, PETRI_TRANSITIONS=2297} [2022-07-12 10:39:42,468 INFO L279 CegarLoopForPetriNet]: 76 programPoint places, 832 predicate places. [2022-07-12 10:39:42,468 INFO L495 AbstractCegarLoop]: Abstraction has has 908 places, 2297 transitions, 84757 flow [2022-07-12 10:39:42,468 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 32 states have (on average 52.875) internal successors, (1692), 32 states have internal predecessors, (1692), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:39:42,468 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-12 10:39:42,468 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, 1, 1, 1, 1, 1, 1, 1] [2022-07-12 10:39:42,484 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Forceful destruction successful, exit code 0 [2022-07-12 10:39:42,668 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21,20 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 10:39:42,669 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-12 10:39:42,669 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 10:39:42,669 INFO L85 PathProgramCache]: Analyzing trace with hash 1306414141, now seen corresponding path program 20 times [2022-07-12 10:39:42,669 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 10:39:42,669 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1402726408] [2022-07-12 10:39:42,669 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 10:39:42,670 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 10:39:42,679 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 10:39:42,831 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 10:39:42,831 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 10:39:42,831 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1402726408] [2022-07-12 10:39:42,831 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1402726408] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-12 10:39:42,831 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1085715682] [2022-07-12 10:39:42,831 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-07-12 10:39:42,831 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 10:39:42,832 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-12 10:39:42,833 INFO L229 MonitoredProcess]: Starting monitored process 21 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-12 10:39:42,834 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2022-07-12 10:39:42,885 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-07-12 10:39:42,885 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-12 10:39:42,886 INFO L263 TraceCheckSpWp]: Trace formula consists of 155 conjuncts, 20 conjunts are in the unsatisfiable core [2022-07-12 10:39:42,887 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-12 10:39:43,144 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 10:39:43,144 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-12 10:39:43,529 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 10:39:43,529 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1085715682] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-12 10:39:43,529 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-12 10:39:43,529 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15, 15] total 31 [2022-07-12 10:39:43,529 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [919074388] [2022-07-12 10:39:43,530 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-12 10:39:43,530 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2022-07-12 10:39:43,530 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 10:39:43,530 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2022-07-12 10:39:43,530 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=154, Invalid=776, Unknown=0, NotChecked=0, Total=930 [2022-07-12 10:39:43,531 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 51 out of 86 [2022-07-12 10:39:43,532 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 908 places, 2297 transitions, 84757 flow. Second operand has 31 states, 31 states have (on average 52.87096774193548) internal successors, (1639), 31 states have internal predecessors, (1639), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:39:43,532 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-12 10:39:43,532 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 51 of 86 [2022-07-12 10:39:43,532 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-12 10:39:50,425 INFO L129 PetriNetUnfolder]: 1701/5368 cut-off events. [2022-07-12 10:39:50,425 INFO L130 PetriNetUnfolder]: For 372076/372088 co-relation queries the response was YES. [2022-07-12 10:39:50,505 INFO L84 FinitePrefix]: Finished finitePrefix Result has 74181 conditions, 5368 events. 1701/5368 cut-off events. For 372076/372088 co-relation queries the response was YES. Maximal size of possible extension queue 390. Compared 53175 event pairs, 87 based on Foata normal form. 9/5358 useless extension candidates. Maximal degree in co-relation 73948. Up to 2260 conditions per place. [2022-07-12 10:39:50,550 INFO L132 encePairwiseOnDemand]: 70/86 looper letters, 1050 selfloop transitions, 1478 changer transitions 24/2593 dead transitions. [2022-07-12 10:39:50,551 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 970 places, 2593 transitions, 99038 flow [2022-07-12 10:39:50,551 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 73 states. [2022-07-12 10:39:50,551 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 73 states. [2022-07-12 10:39:50,553 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 73 states to 73 states and 4001 transitions. [2022-07-12 10:39:50,554 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.6373048741637464 [2022-07-12 10:39:50,554 INFO L72 ComplementDD]: Start complementDD. Operand 73 states and 4001 transitions. [2022-07-12 10:39:50,554 INFO L73 IsDeterministic]: Start isDeterministic. Operand 73 states and 4001 transitions. [2022-07-12 10:39:50,554 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-12 10:39:50,555 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 73 states and 4001 transitions. [2022-07-12 10:39:50,557 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 74 states, 73 states have (on average 54.80821917808219) internal successors, (4001), 73 states have internal predecessors, (4001), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:39:50,561 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 74 states, 74 states have (on average 86.0) internal successors, (6364), 74 states have internal predecessors, (6364), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:39:50,561 INFO L81 ComplementDD]: Finished complementDD. Result has 74 states, 74 states have (on average 86.0) internal successors, (6364), 74 states have internal predecessors, (6364), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:39:50,561 INFO L186 Difference]: Start difference. First operand has 908 places, 2297 transitions, 84757 flow. Second operand 73 states and 4001 transitions. [2022-07-12 10:39:50,561 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 970 places, 2593 transitions, 99038 flow [2022-07-12 10:39:54,527 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 941 places, 2593 transitions, 97949 flow, removed 423 selfloop flow, removed 29 redundant places. [2022-07-12 10:39:54,596 INFO L242 Difference]: Finished difference. Result has 971 places, 2474 transitions, 95826 flow [2022-07-12 10:39:54,598 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=86, PETRI_DIFFERENCE_MINUEND_FLOW=84095, PETRI_DIFFERENCE_MINUEND_PLACES=869, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=2297, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1304, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=859, PETRI_DIFFERENCE_SUBTRAHEND_STATES=73, PETRI_FLOW=95826, PETRI_PLACES=971, PETRI_TRANSITIONS=2474} [2022-07-12 10:39:54,598 INFO L279 CegarLoopForPetriNet]: 76 programPoint places, 895 predicate places. [2022-07-12 10:39:54,599 INFO L495 AbstractCegarLoop]: Abstraction has has 971 places, 2474 transitions, 95826 flow [2022-07-12 10:39:54,599 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 31 states have (on average 52.87096774193548) internal successors, (1639), 31 states have internal predecessors, (1639), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:39:54,599 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-12 10:39:54,599 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, 1, 1, 1, 1, 1, 1, 1] [2022-07-12 10:39:54,615 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Forceful destruction successful, exit code 0 [2022-07-12 10:39:54,799 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable22 [2022-07-12 10:39:54,800 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-12 10:39:54,800 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 10:39:54,800 INFO L85 PathProgramCache]: Analyzing trace with hash -1839589707, now seen corresponding path program 21 times [2022-07-12 10:39:54,800 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 10:39:54,800 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [742411648] [2022-07-12 10:39:54,801 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 10:39:54,801 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 10:39:54,808 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 10:39:54,945 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 10:39:54,946 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 10:39:54,946 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [742411648] [2022-07-12 10:39:54,946 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [742411648] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-12 10:39:54,946 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [210921106] [2022-07-12 10:39:54,946 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-07-12 10:39:54,946 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 10:39:54,946 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-12 10:39:54,948 INFO L229 MonitoredProcess]: Starting monitored process 22 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-12 10:39:54,991 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2022-07-12 10:39:55,020 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-07-12 10:39:55,020 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-12 10:39:55,021 INFO L263 TraceCheckSpWp]: Trace formula consists of 155 conjuncts, 20 conjunts are in the unsatisfiable core [2022-07-12 10:39:55,022 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-12 10:39:55,264 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 10:39:55,264 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-12 10:39:55,612 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 10:39:55,612 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [210921106] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-12 10:39:55,612 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-12 10:39:55,612 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15, 15] total 32 [2022-07-12 10:39:55,612 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [332060039] [2022-07-12 10:39:55,612 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-12 10:39:55,612 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2022-07-12 10:39:55,612 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 10:39:55,613 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2022-07-12 10:39:55,613 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=155, Invalid=837, Unknown=0, NotChecked=0, Total=992 [2022-07-12 10:39:55,614 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 51 out of 86 [2022-07-12 10:39:55,614 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 971 places, 2474 transitions, 95826 flow. Second operand has 32 states, 32 states have (on average 52.84375) internal successors, (1691), 32 states have internal predecessors, (1691), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:39:55,615 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-12 10:39:55,615 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 51 of 86 [2022-07-12 10:39:55,615 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-12 10:40:03,954 INFO L129 PetriNetUnfolder]: 1920/6029 cut-off events. [2022-07-12 10:40:03,954 INFO L130 PetriNetUnfolder]: For 488353/488358 co-relation queries the response was YES. [2022-07-12 10:40:04,061 INFO L84 FinitePrefix]: Finished finitePrefix Result has 87935 conditions, 6029 events. 1920/6029 cut-off events. For 488353/488358 co-relation queries the response was YES. Maximal size of possible extension queue 449. Compared 60995 event pairs, 88 based on Foata normal form. 8/6018 useless extension candidates. Maximal degree in co-relation 87697. Up to 2325 conditions per place. [2022-07-12 10:40:04,111 INFO L132 encePairwiseOnDemand]: 70/86 looper letters, 1171 selfloop transitions, 1743 changer transitions 19/2974 dead transitions. [2022-07-12 10:40:04,111 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 1046 places, 2974 transitions, 120126 flow [2022-07-12 10:40:04,111 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 86 states. [2022-07-12 10:40:04,112 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 86 states. [2022-07-12 10:40:04,113 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 86 states to 86 states and 4694 transitions. [2022-07-12 10:40:04,114 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.6346673877771769 [2022-07-12 10:40:04,115 INFO L72 ComplementDD]: Start complementDD. Operand 86 states and 4694 transitions. [2022-07-12 10:40:04,115 INFO L73 IsDeterministic]: Start isDeterministic. Operand 86 states and 4694 transitions. [2022-07-12 10:40:04,115 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-12 10:40:04,115 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 86 states and 4694 transitions. [2022-07-12 10:40:04,118 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 87 states, 86 states have (on average 54.58139534883721) internal successors, (4694), 86 states have internal predecessors, (4694), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:40:04,122 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 87 states, 87 states have (on average 86.0) internal successors, (7482), 87 states have internal predecessors, (7482), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:40:04,123 INFO L81 ComplementDD]: Finished complementDD. Result has 87 states, 87 states have (on average 86.0) internal successors, (7482), 87 states have internal predecessors, (7482), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:40:04,123 INFO L186 Difference]: Start difference. First operand has 971 places, 2474 transitions, 95826 flow. Second operand 86 states and 4694 transitions. [2022-07-12 10:40:04,123 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 1046 places, 2974 transitions, 120126 flow [2022-07-12 10:40:09,687 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 1014 places, 2974 transitions, 117968 flow, removed 979 selfloop flow, removed 32 redundant places. [2022-07-12 10:40:09,772 INFO L242 Difference]: Finished difference. Result has 1061 places, 2836 transitions, 116241 flow [2022-07-12 10:40:09,774 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=86, PETRI_DIFFERENCE_MINUEND_FLOW=94873, PETRI_DIFFERENCE_MINUEND_PLACES=929, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=2474, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1410, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=910, PETRI_DIFFERENCE_SUBTRAHEND_STATES=86, PETRI_FLOW=116241, PETRI_PLACES=1061, PETRI_TRANSITIONS=2836} [2022-07-12 10:40:09,774 INFO L279 CegarLoopForPetriNet]: 76 programPoint places, 985 predicate places. [2022-07-12 10:40:09,774 INFO L495 AbstractCegarLoop]: Abstraction has has 1061 places, 2836 transitions, 116241 flow [2022-07-12 10:40:09,775 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 32 states have (on average 52.84375) internal successors, (1691), 32 states have internal predecessors, (1691), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:40:09,775 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-12 10:40:09,775 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, 1, 1, 1, 1, 1, 1, 1] [2022-07-12 10:40:09,791 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Forceful destruction successful, exit code 0 [2022-07-12 10:40:09,975 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable23 [2022-07-12 10:40:09,975 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-12 10:40:09,976 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 10:40:09,976 INFO L85 PathProgramCache]: Analyzing trace with hash -1606411847, now seen corresponding path program 22 times [2022-07-12 10:40:09,976 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 10:40:09,976 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1953737954] [2022-07-12 10:40:09,976 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 10:40:09,976 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 10:40:09,985 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 10:40:10,129 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 10:40:10,130 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 10:40:10,130 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1953737954] [2022-07-12 10:40:10,130 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1953737954] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-12 10:40:10,130 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [57450776] [2022-07-12 10:40:10,130 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-07-12 10:40:10,130 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 10:40:10,130 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-12 10:40:10,131 INFO L229 MonitoredProcess]: Starting monitored process 23 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-12 10:40:10,132 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2022-07-12 10:40:10,183 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-07-12 10:40:10,183 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-12 10:40:10,184 INFO L263 TraceCheckSpWp]: Trace formula consists of 135 conjuncts, 20 conjunts are in the unsatisfiable core [2022-07-12 10:40:10,185 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-12 10:40:10,445 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 10:40:10,446 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-12 10:40:10,903 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 10:40:10,903 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [57450776] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-12 10:40:10,903 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-12 10:40:10,903 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15, 15] total 32 [2022-07-12 10:40:10,905 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2109817000] [2022-07-12 10:40:10,905 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-12 10:40:10,906 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2022-07-12 10:40:10,906 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 10:40:10,906 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2022-07-12 10:40:10,906 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=146, Invalid=846, Unknown=0, NotChecked=0, Total=992 [2022-07-12 10:40:10,915 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 51 out of 86 [2022-07-12 10:40:10,916 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 1061 places, 2836 transitions, 116241 flow. Second operand has 32 states, 32 states have (on average 52.875) internal successors, (1692), 32 states have internal predecessors, (1692), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:40:10,916 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-12 10:40:10,916 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 51 of 86 [2022-07-12 10:40:10,916 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-12 10:40:19,261 INFO L129 PetriNetUnfolder]: 1965/6117 cut-off events. [2022-07-12 10:40:19,261 INFO L130 PetriNetUnfolder]: For 518413/518425 co-relation queries the response was YES. [2022-07-12 10:40:19,381 INFO L84 FinitePrefix]: Finished finitePrefix Result has 93511 conditions, 6117 events. 1965/6117 cut-off events. For 518413/518425 co-relation queries the response was YES. Maximal size of possible extension queue 448. Compared 61774 event pairs, 90 based on Foata normal form. 11/6108 useless extension candidates. Maximal degree in co-relation 93236. Up to 2253 conditions per place. [2022-07-12 10:40:19,630 INFO L132 encePairwiseOnDemand]: 70/86 looper letters, 1204 selfloop transitions, 1743 changer transitions 37/3025 dead transitions. [2022-07-12 10:40:19,631 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 1118 places, 3025 transitions, 128570 flow [2022-07-12 10:40:19,631 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 67 states. [2022-07-12 10:40:19,631 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 67 states. [2022-07-12 10:40:19,633 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67 states to 67 states and 3662 transitions. [2022-07-12 10:40:19,633 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.6355432141617494 [2022-07-12 10:40:19,633 INFO L72 ComplementDD]: Start complementDD. Operand 67 states and 3662 transitions. [2022-07-12 10:40:19,634 INFO L73 IsDeterministic]: Start isDeterministic. Operand 67 states and 3662 transitions. [2022-07-12 10:40:19,634 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-12 10:40:19,634 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 67 states and 3662 transitions. [2022-07-12 10:40:19,637 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 68 states, 67 states have (on average 54.656716417910445) internal successors, (3662), 67 states have internal predecessors, (3662), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:40:19,640 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 68 states, 68 states have (on average 86.0) internal successors, (5848), 68 states have internal predecessors, (5848), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:40:19,641 INFO L81 ComplementDD]: Finished complementDD. Result has 68 states, 68 states have (on average 86.0) internal successors, (5848), 68 states have internal predecessors, (5848), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:40:19,641 INFO L186 Difference]: Start difference. First operand has 1061 places, 2836 transitions, 116241 flow. Second operand 67 states and 3662 transitions. [2022-07-12 10:40:19,641 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 1118 places, 3025 transitions, 128570 flow [2022-07-12 10:40:27,337 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 1091 places, 3025 transitions, 125655 flow, removed 1221 selfloop flow, removed 27 redundant places. [2022-07-12 10:40:27,440 INFO L242 Difference]: Finished difference. Result has 1117 places, 2896 transitions, 123291 flow [2022-07-12 10:40:27,442 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=86, PETRI_DIFFERENCE_MINUEND_FLOW=113944, PETRI_DIFFERENCE_MINUEND_PLACES=1025, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=2836, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1674, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=1129, PETRI_DIFFERENCE_SUBTRAHEND_STATES=67, PETRI_FLOW=123291, PETRI_PLACES=1117, PETRI_TRANSITIONS=2896} [2022-07-12 10:40:27,442 INFO L279 CegarLoopForPetriNet]: 76 programPoint places, 1041 predicate places. [2022-07-12 10:40:27,442 INFO L495 AbstractCegarLoop]: Abstraction has has 1117 places, 2896 transitions, 123291 flow [2022-07-12 10:40:27,443 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 32 states have (on average 52.875) internal successors, (1692), 32 states have internal predecessors, (1692), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:40:27,443 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-12 10:40:27,443 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, 1, 1, 1, 1, 1, 1, 1] [2022-07-12 10:40:27,459 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Ended with exit code 0 [2022-07-12 10:40:27,643 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24,23 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 10:40:27,644 INFO L420 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-12 10:40:27,644 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 10:40:27,644 INFO L85 PathProgramCache]: Analyzing trace with hash 1025476009, now seen corresponding path program 23 times [2022-07-12 10:40:27,644 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 10:40:27,644 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1532100289] [2022-07-12 10:40:27,644 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 10:40:27,644 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 10:40:27,662 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 10:40:27,834 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 10:40:27,834 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 10:40:27,834 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1532100289] [2022-07-12 10:40:27,834 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1532100289] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-12 10:40:27,834 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2125352118] [2022-07-12 10:40:27,834 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-07-12 10:40:27,834 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 10:40:27,835 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-12 10:40:27,836 INFO L229 MonitoredProcess]: Starting monitored process 24 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-12 10:40:27,836 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Waiting until timeout for monitored process [2022-07-12 10:40:27,885 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-07-12 10:40:27,886 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-12 10:40:27,886 INFO L263 TraceCheckSpWp]: Trace formula consists of 155 conjuncts, 20 conjunts are in the unsatisfiable core [2022-07-12 10:40:27,887 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-12 10:40:28,140 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 10:40:28,140 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-12 10:40:28,403 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 10:40:28,404 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2125352118] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-12 10:40:28,404 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-12 10:40:28,404 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15, 15] total 32 [2022-07-12 10:40:28,404 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [552137373] [2022-07-12 10:40:28,404 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-12 10:40:28,404 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2022-07-12 10:40:28,404 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 10:40:28,405 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2022-07-12 10:40:28,405 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=178, Invalid=814, Unknown=0, NotChecked=0, Total=992 [2022-07-12 10:40:28,406 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 51 out of 86 [2022-07-12 10:40:28,406 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 1117 places, 2896 transitions, 123291 flow. Second operand has 32 states, 32 states have (on average 52.875) internal successors, (1692), 32 states have internal predecessors, (1692), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:40:28,406 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-12 10:40:28,406 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 51 of 86 [2022-07-12 10:40:28,406 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-12 10:40:36,185 INFO L129 PetriNetUnfolder]: 2023/6196 cut-off events. [2022-07-12 10:40:36,185 INFO L130 PetriNetUnfolder]: For 484548/484553 co-relation queries the response was YES. [2022-07-12 10:40:36,307 INFO L84 FinitePrefix]: Finished finitePrefix Result has 97048 conditions, 6196 events. 2023/6196 cut-off events. For 484548/484553 co-relation queries the response was YES. Maximal size of possible extension queue 461. Compared 62412 event pairs, 91 based on Foata normal form. 5/6182 useless extension candidates. Maximal degree in co-relation 96761. Up to 2709 conditions per place. [2022-07-12 10:40:36,418 INFO L132 encePairwiseOnDemand]: 70/86 looper letters, 1426 selfloop transitions, 1616 changer transitions 8/3091 dead transitions. [2022-07-12 10:40:36,418 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 1137 places, 3091 transitions, 136138 flow [2022-07-12 10:40:36,418 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2022-07-12 10:40:36,418 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 36 states. [2022-07-12 10:40:36,419 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 1986 transitions. [2022-07-12 10:40:36,419 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.6414728682170543 [2022-07-12 10:40:36,419 INFO L72 ComplementDD]: Start complementDD. Operand 36 states and 1986 transitions. [2022-07-12 10:40:36,420 INFO L73 IsDeterministic]: Start isDeterministic. Operand 36 states and 1986 transitions. [2022-07-12 10:40:36,420 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-12 10:40:36,420 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 36 states and 1986 transitions. [2022-07-12 10:40:36,421 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 37 states, 36 states have (on average 55.166666666666664) internal successors, (1986), 36 states have internal predecessors, (1986), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:40:36,423 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 37 states, 37 states have (on average 86.0) internal successors, (3182), 37 states have internal predecessors, (3182), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:40:36,423 INFO L81 ComplementDD]: Finished complementDD. Result has 37 states, 37 states have (on average 86.0) internal successors, (3182), 37 states have internal predecessors, (3182), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:40:36,423 INFO L186 Difference]: Start difference. First operand has 1117 places, 2896 transitions, 123291 flow. Second operand 36 states and 1986 transitions. [2022-07-12 10:40:36,423 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 1137 places, 3091 transitions, 136138 flow [2022-07-12 10:40:42,817 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 1103 places, 3091 transitions, 135349 flow, removed 91 selfloop flow, removed 34 redundant places. [2022-07-12 10:40:42,917 INFO L242 Difference]: Finished difference. Result has 1112 places, 2971 transitions, 129492 flow [2022-07-12 10:40:42,919 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=86, PETRI_DIFFERENCE_MINUEND_FLOW=122623, PETRI_DIFFERENCE_MINUEND_PLACES=1068, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=2896, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1540, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=1340, PETRI_DIFFERENCE_SUBTRAHEND_STATES=36, PETRI_FLOW=129492, PETRI_PLACES=1112, PETRI_TRANSITIONS=2971} [2022-07-12 10:40:42,920 INFO L279 CegarLoopForPetriNet]: 76 programPoint places, 1036 predicate places. [2022-07-12 10:40:42,920 INFO L495 AbstractCegarLoop]: Abstraction has has 1112 places, 2971 transitions, 129492 flow [2022-07-12 10:40:42,920 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 32 states have (on average 52.875) internal successors, (1692), 32 states have internal predecessors, (1692), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:40:42,920 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-12 10:40:42,920 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, 1, 1, 1, 1, 1, 1, 1] [2022-07-12 10:40:42,939 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Ended with exit code 0 [2022-07-12 10:40:43,139 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25,24 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 10:40:43,139 INFO L420 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-12 10:40:43,140 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 10:40:43,140 INFO L85 PathProgramCache]: Analyzing trace with hash 1707648643, now seen corresponding path program 24 times [2022-07-12 10:40:43,140 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 10:40:43,140 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1590466447] [2022-07-12 10:40:43,140 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 10:40:43,140 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 10:40:43,148 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 10:40:43,310 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 10:40:43,310 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 10:40:43,310 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1590466447] [2022-07-12 10:40:43,310 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1590466447] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-12 10:40:43,310 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [213907923] [2022-07-12 10:40:43,310 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-07-12 10:40:43,310 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 10:40:43,310 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-12 10:40:43,311 INFO L229 MonitoredProcess]: Starting monitored process 25 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-12 10:40:43,312 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Waiting until timeout for monitored process [2022-07-12 10:40:43,364 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-07-12 10:40:43,364 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-12 10:40:43,365 INFO L263 TraceCheckSpWp]: Trace formula consists of 155 conjuncts, 20 conjunts are in the unsatisfiable core [2022-07-12 10:40:43,366 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-12 10:40:43,625 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 10:40:43,625 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-12 10:40:43,920 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 10:40:43,921 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [213907923] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-12 10:40:43,921 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-12 10:40:43,921 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15, 15] total 32 [2022-07-12 10:40:43,921 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [961658315] [2022-07-12 10:40:43,921 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-12 10:40:43,921 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2022-07-12 10:40:43,921 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 10:40:43,922 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2022-07-12 10:40:43,922 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=167, Invalid=825, Unknown=0, NotChecked=0, Total=992 [2022-07-12 10:40:43,923 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 51 out of 86 [2022-07-12 10:40:43,923 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 1112 places, 2971 transitions, 129492 flow. Second operand has 32 states, 32 states have (on average 52.84375) internal successors, (1691), 32 states have internal predecessors, (1691), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:40:43,923 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-12 10:40:43,923 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 51 of 86 [2022-07-12 10:40:43,924 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-12 10:40:53,346 INFO L129 PetriNetUnfolder]: 2100/6439 cut-off events. [2022-07-12 10:40:53,346 INFO L130 PetriNetUnfolder]: For 527383/527395 co-relation queries the response was YES. [2022-07-12 10:40:53,466 INFO L84 FinitePrefix]: Finished finitePrefix Result has 102412 conditions, 6439 events. 2100/6439 cut-off events. For 527383/527395 co-relation queries the response was YES. Maximal size of possible extension queue 467. Compared 65284 event pairs, 77 based on Foata normal form. 7/6426 useless extension candidates. Maximal degree in co-relation 102126. Up to 1857 conditions per place. [2022-07-12 10:40:53,523 INFO L132 encePairwiseOnDemand]: 71/86 looper letters, 1368 selfloop transitions, 1814 changer transitions 12/3235 dead transitions. [2022-07-12 10:40:53,523 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 1184 places, 3235 transitions, 146186 flow [2022-07-12 10:40:53,523 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 76 states. [2022-07-12 10:40:53,523 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 76 states. [2022-07-12 10:40:53,524 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 76 states to 76 states and 4154 transitions. [2022-07-12 10:40:53,525 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.6355569155446756 [2022-07-12 10:40:53,525 INFO L72 ComplementDD]: Start complementDD. Operand 76 states and 4154 transitions. [2022-07-12 10:40:53,525 INFO L73 IsDeterministic]: Start isDeterministic. Operand 76 states and 4154 transitions. [2022-07-12 10:40:53,526 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-12 10:40:53,526 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 76 states and 4154 transitions. [2022-07-12 10:40:53,528 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 77 states, 76 states have (on average 54.6578947368421) internal successors, (4154), 76 states have internal predecessors, (4154), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:40:53,531 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 77 states, 77 states have (on average 86.0) internal successors, (6622), 77 states have internal predecessors, (6622), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:40:53,532 INFO L81 ComplementDD]: Finished complementDD. Result has 77 states, 77 states have (on average 86.0) internal successors, (6622), 77 states have internal predecessors, (6622), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:40:53,532 INFO L186 Difference]: Start difference. First operand has 1112 places, 2971 transitions, 129492 flow. Second operand 76 states and 4154 transitions. [2022-07-12 10:40:53,532 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 1184 places, 3235 transitions, 146186 flow [2022-07-12 10:41:00,889 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 1167 places, 3235 transitions, 145752 flow, removed 70 selfloop flow, removed 17 redundant places. [2022-07-12 10:41:00,990 INFO L242 Difference]: Finished difference. Result has 1191 places, 3109 transitions, 141016 flow [2022-07-12 10:41:00,994 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=86, PETRI_DIFFERENCE_MINUEND_FLOW=129088, PETRI_DIFFERENCE_MINUEND_PLACES=1092, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=2971, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1679, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=1261, PETRI_DIFFERENCE_SUBTRAHEND_STATES=76, PETRI_FLOW=141016, PETRI_PLACES=1191, PETRI_TRANSITIONS=3109} [2022-07-12 10:41:00,994 INFO L279 CegarLoopForPetriNet]: 76 programPoint places, 1115 predicate places. [2022-07-12 10:41:00,994 INFO L495 AbstractCegarLoop]: Abstraction has has 1191 places, 3109 transitions, 141016 flow [2022-07-12 10:41:00,995 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 32 states have (on average 52.84375) internal successors, (1691), 32 states have internal predecessors, (1691), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:41:00,995 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-12 10:41:00,995 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, 1, 1, 1, 1, 1, 1, 1] [2022-07-12 10:41:01,013 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Forceful destruction successful, exit code 0 [2022-07-12 10:41:01,195 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 25 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2022-07-12 10:41:01,195 INFO L420 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-12 10:41:01,196 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 10:41:01,196 INFO L85 PathProgramCache]: Analyzing trace with hash 391613489, now seen corresponding path program 25 times [2022-07-12 10:41:01,196 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 10:41:01,196 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1193361763] [2022-07-12 10:41:01,196 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 10:41:01,196 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 10:41:01,209 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 10:41:01,359 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 10:41:01,359 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 10:41:01,359 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1193361763] [2022-07-12 10:41:01,359 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1193361763] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-12 10:41:01,359 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [222236887] [2022-07-12 10:41:01,360 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-07-12 10:41:01,360 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 10:41:01,360 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-12 10:41:01,361 INFO L229 MonitoredProcess]: Starting monitored process 26 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-12 10:41:01,361 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Waiting until timeout for monitored process [2022-07-12 10:41:01,413 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 10:41:01,413 INFO L263 TraceCheckSpWp]: Trace formula consists of 155 conjuncts, 20 conjunts are in the unsatisfiable core [2022-07-12 10:41:01,414 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-12 10:41:01,636 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 10:41:01,636 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-12 10:41:01,968 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 10:41:01,968 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [222236887] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-12 10:41:01,969 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-12 10:41:01,969 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15, 15] total 32 [2022-07-12 10:41:01,969 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1987110577] [2022-07-12 10:41:01,969 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-12 10:41:01,969 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2022-07-12 10:41:01,969 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 10:41:01,970 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2022-07-12 10:41:01,970 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=165, Invalid=827, Unknown=0, NotChecked=0, Total=992 [2022-07-12 10:41:01,971 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 51 out of 86 [2022-07-12 10:41:01,971 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 1191 places, 3109 transitions, 141016 flow. Second operand has 32 states, 32 states have (on average 52.875) internal successors, (1692), 32 states have internal predecessors, (1692), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:41:01,972 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-12 10:41:01,972 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 51 of 86 [2022-07-12 10:41:01,972 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-12 10:41:13,068 INFO L129 PetriNetUnfolder]: 2100/6437 cut-off events. [2022-07-12 10:41:13,068 INFO L130 PetriNetUnfolder]: For 614118/614130 co-relation queries the response was YES. [2022-07-12 10:41:13,198 INFO L84 FinitePrefix]: Finished finitePrefix Result has 107011 conditions, 6437 events. 2100/6437 cut-off events. For 614118/614130 co-relation queries the response was YES. Maximal size of possible extension queue 472. Compared 65343 event pairs, 81 based on Foata normal form. 9/6430 useless extension candidates. Maximal degree in co-relation 106707. Up to 1893 conditions per place. [2022-07-12 10:41:13,257 INFO L132 encePairwiseOnDemand]: 70/86 looper letters, 1060 selfloop transitions, 2089 changer transitions 21/3211 dead transitions. [2022-07-12 10:41:13,257 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 1255 places, 3211 transitions, 150677 flow [2022-07-12 10:41:13,258 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 71 states. [2022-07-12 10:41:13,258 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 71 states. [2022-07-12 10:41:13,259 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71 states to 71 states and 3882 transitions. [2022-07-12 10:41:13,260 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.6357680969538159 [2022-07-12 10:41:13,260 INFO L72 ComplementDD]: Start complementDD. Operand 71 states and 3882 transitions. [2022-07-12 10:41:13,260 INFO L73 IsDeterministic]: Start isDeterministic. Operand 71 states and 3882 transitions. [2022-07-12 10:41:13,261 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-12 10:41:13,261 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 71 states and 3882 transitions. [2022-07-12 10:41:13,263 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 72 states, 71 states have (on average 54.67605633802817) internal successors, (3882), 71 states have internal predecessors, (3882), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:41:13,266 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 72 states, 72 states have (on average 86.0) internal successors, (6192), 72 states have internal predecessors, (6192), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:41:13,267 INFO L81 ComplementDD]: Finished complementDD. Result has 72 states, 72 states have (on average 86.0) internal successors, (6192), 72 states have internal predecessors, (6192), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:41:13,267 INFO L186 Difference]: Start difference. First operand has 1191 places, 3109 transitions, 141016 flow. Second operand 71 states and 3882 transitions. [2022-07-12 10:41:13,267 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 1255 places, 3211 transitions, 150677 flow [2022-07-12 10:41:22,354 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 1222 places, 3211 transitions, 148588 flow, removed 848 selfloop flow, removed 33 redundant places. [2022-07-12 10:41:22,477 INFO L242 Difference]: Finished difference. Result has 1229 places, 3107 transitions, 143510 flow [2022-07-12 10:41:22,480 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=86, PETRI_DIFFERENCE_MINUEND_FLOW=139132, PETRI_DIFFERENCE_MINUEND_PLACES=1152, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=3109, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2085, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=1024, PETRI_DIFFERENCE_SUBTRAHEND_STATES=71, PETRI_FLOW=143510, PETRI_PLACES=1229, PETRI_TRANSITIONS=3107} [2022-07-12 10:41:22,480 INFO L279 CegarLoopForPetriNet]: 76 programPoint places, 1153 predicate places. [2022-07-12 10:41:22,480 INFO L495 AbstractCegarLoop]: Abstraction has has 1229 places, 3107 transitions, 143510 flow [2022-07-12 10:41:22,481 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 32 states have (on average 52.875) internal successors, (1692), 32 states have internal predecessors, (1692), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:41:22,481 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-12 10:41:22,481 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, 1, 1, 1, 1, 1, 1, 1] [2022-07-12 10:41:22,497 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Forceful destruction successful, exit code 0 [2022-07-12 10:41:22,684 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27 [2022-07-12 10:41:22,684 INFO L420 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-12 10:41:22,684 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 10:41:22,684 INFO L85 PathProgramCache]: Analyzing trace with hash -1193111131, now seen corresponding path program 26 times [2022-07-12 10:41:22,685 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 10:41:22,685 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1387213531] [2022-07-12 10:41:22,685 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 10:41:22,685 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 10:41:22,693 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 10:41:22,856 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 10:41:22,856 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 10:41:22,856 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1387213531] [2022-07-12 10:41:22,856 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1387213531] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-12 10:41:22,856 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2232457] [2022-07-12 10:41:22,856 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-07-12 10:41:22,856 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 10:41:22,856 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-12 10:41:22,857 INFO L229 MonitoredProcess]: Starting monitored process 27 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-12 10:41:22,858 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Waiting until timeout for monitored process [2022-07-12 10:41:22,910 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-07-12 10:41:22,910 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-12 10:41:22,911 INFO L263 TraceCheckSpWp]: Trace formula consists of 155 conjuncts, 20 conjunts are in the unsatisfiable core [2022-07-12 10:41:22,912 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-12 10:41:23,202 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 10:41:23,202 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-12 10:41:23,486 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 10:41:23,486 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2232457] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-12 10:41:23,486 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-12 10:41:23,486 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15, 15] total 32 [2022-07-12 10:41:23,487 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [581244430] [2022-07-12 10:41:23,487 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-12 10:41:23,487 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2022-07-12 10:41:23,487 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 10:41:23,487 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2022-07-12 10:41:23,488 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=154, Invalid=838, Unknown=0, NotChecked=0, Total=992 [2022-07-12 10:41:23,488 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 51 out of 86 [2022-07-12 10:41:23,489 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 1229 places, 3107 transitions, 143510 flow. Second operand has 32 states, 32 states have (on average 52.84375) internal successors, (1691), 32 states have internal predecessors, (1691), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:41:23,489 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-12 10:41:23,489 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 51 of 86 [2022-07-12 10:41:23,489 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-12 10:41:32,401 INFO L129 PetriNetUnfolder]: 2161/6543 cut-off events. [2022-07-12 10:41:32,401 INFO L130 PetriNetUnfolder]: For 633051/633056 co-relation queries the response was YES. [2022-07-12 10:41:32,680 INFO L84 FinitePrefix]: Finished finitePrefix Result has 111366 conditions, 6543 events. 2161/6543 cut-off events. For 633051/633056 co-relation queries the response was YES. Maximal size of possible extension queue 472. Compared 66248 event pairs, 87 based on Foata normal form. 6/6529 useless extension candidates. Maximal degree in co-relation 111065. Up to 3000 conditions per place. [2022-07-12 10:41:32,754 INFO L132 encePairwiseOnDemand]: 71/86 looper letters, 1281 selfloop transitions, 2038 changer transitions 12/3372 dead transitions. [2022-07-12 10:41:32,755 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 1271 places, 3372 transitions, 159103 flow [2022-07-12 10:41:32,757 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 55 states. [2022-07-12 10:41:32,757 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 55 states. [2022-07-12 10:41:32,759 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 3012 transitions. [2022-07-12 10:41:32,759 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.6367864693446089 [2022-07-12 10:41:32,759 INFO L72 ComplementDD]: Start complementDD. Operand 55 states and 3012 transitions. [2022-07-12 10:41:32,759 INFO L73 IsDeterministic]: Start isDeterministic. Operand 55 states and 3012 transitions. [2022-07-12 10:41:32,760 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-12 10:41:32,760 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 55 states and 3012 transitions. [2022-07-12 10:41:32,762 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 56 states, 55 states have (on average 54.763636363636365) internal successors, (3012), 55 states have internal predecessors, (3012), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:41:32,764 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 56 states, 56 states have (on average 86.0) internal successors, (4816), 56 states have internal predecessors, (4816), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:41:32,764 INFO L81 ComplementDD]: Finished complementDD. Result has 56 states, 56 states have (on average 86.0) internal successors, (4816), 56 states have internal predecessors, (4816), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:41:32,764 INFO L186 Difference]: Start difference. First operand has 1229 places, 3107 transitions, 143510 flow. Second operand 55 states and 3012 transitions. [2022-07-12 10:41:32,764 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 1271 places, 3372 transitions, 159103 flow [2022-07-12 10:41:42,471 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 1217 places, 3372 transitions, 156223 flow, removed 154 selfloop flow, removed 54 redundant places. [2022-07-12 10:41:42,580 INFO L242 Difference]: Finished difference. Result has 1238 places, 3279 transitions, 153027 flow [2022-07-12 10:41:42,582 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=86, PETRI_DIFFERENCE_MINUEND_FLOW=140798, PETRI_DIFFERENCE_MINUEND_PLACES=1163, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=3107, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1880, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=1181, PETRI_DIFFERENCE_SUBTRAHEND_STATES=55, PETRI_FLOW=153027, PETRI_PLACES=1238, PETRI_TRANSITIONS=3279} [2022-07-12 10:41:42,583 INFO L279 CegarLoopForPetriNet]: 76 programPoint places, 1162 predicate places. [2022-07-12 10:41:42,583 INFO L495 AbstractCegarLoop]: Abstraction has has 1238 places, 3279 transitions, 153027 flow [2022-07-12 10:41:42,583 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 32 states have (on average 52.84375) internal successors, (1691), 32 states have internal predecessors, (1691), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:41:42,583 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-12 10:41:42,583 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, 1, 1, 1, 1, 1, 1, 1] [2022-07-12 10:41:42,599 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Forceful destruction successful, exit code 0 [2022-07-12 10:41:42,791 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2022-07-12 10:41:42,791 INFO L420 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-12 10:41:42,792 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 10:41:42,792 INFO L85 PathProgramCache]: Analyzing trace with hash 1442126069, now seen corresponding path program 27 times [2022-07-12 10:41:42,792 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 10:41:42,792 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1720475240] [2022-07-12 10:41:42,792 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 10:41:42,792 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 10:41:42,801 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 10:41:42,973 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 10:41:42,973 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 10:41:42,973 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1720475240] [2022-07-12 10:41:42,973 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1720475240] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-12 10:41:42,973 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [774828477] [2022-07-12 10:41:42,973 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-07-12 10:41:42,973 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 10:41:42,974 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-12 10:41:42,975 INFO L229 MonitoredProcess]: Starting monitored process 28 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-12 10:41:42,975 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Waiting until timeout for monitored process [2022-07-12 10:41:43,030 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-07-12 10:41:43,030 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-12 10:41:43,031 INFO L263 TraceCheckSpWp]: Trace formula consists of 155 conjuncts, 20 conjunts are in the unsatisfiable core [2022-07-12 10:41:43,032 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-12 10:41:43,273 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 10:41:43,273 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-12 10:41:43,541 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 10:41:43,542 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [774828477] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-12 10:41:43,542 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-12 10:41:43,542 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15, 15] total 32 [2022-07-12 10:41:43,542 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1702250606] [2022-07-12 10:41:43,542 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-12 10:41:43,542 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2022-07-12 10:41:43,542 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 10:41:43,543 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2022-07-12 10:41:43,543 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=169, Invalid=823, Unknown=0, NotChecked=0, Total=992 [2022-07-12 10:41:43,544 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 51 out of 86 [2022-07-12 10:41:43,544 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 1238 places, 3279 transitions, 153027 flow. Second operand has 32 states, 32 states have (on average 52.84375) internal successors, (1691), 32 states have internal predecessors, (1691), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:41:43,544 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-12 10:41:43,544 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 51 of 86 [2022-07-12 10:41:43,544 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-12 10:41:53,772 INFO L129 PetriNetUnfolder]: 2211/6770 cut-off events. [2022-07-12 10:41:53,772 INFO L130 PetriNetUnfolder]: For 667739/667751 co-relation queries the response was YES. [2022-07-12 10:41:53,912 INFO L84 FinitePrefix]: Finished finitePrefix Result has 117078 conditions, 6770 events. 2211/6770 cut-off events. For 667739/667751 co-relation queries the response was YES. Maximal size of possible extension queue 499. Compared 69451 event pairs, 80 based on Foata normal form. 5/6758 useless extension candidates. Maximal degree in co-relation 116765. Up to 2910 conditions per place. [2022-07-12 10:41:53,976 INFO L132 encePairwiseOnDemand]: 71/86 looper letters, 1245 selfloop transitions, 2218 changer transitions 12/3516 dead transitions. [2022-07-12 10:41:53,976 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 1299 places, 3516 transitions, 168736 flow [2022-07-12 10:41:53,977 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 68 states. [2022-07-12 10:41:53,977 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 68 states. [2022-07-12 10:41:53,978 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68 states to 68 states and 3740 transitions. [2022-07-12 10:41:53,978 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.6395348837209303 [2022-07-12 10:41:53,979 INFO L72 ComplementDD]: Start complementDD. Operand 68 states and 3740 transitions. [2022-07-12 10:41:53,979 INFO L73 IsDeterministic]: Start isDeterministic. Operand 68 states and 3740 transitions. [2022-07-12 10:41:53,979 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-12 10:41:53,979 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 68 states and 3740 transitions. [2022-07-12 10:41:53,981 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 69 states, 68 states have (on average 55.0) internal successors, (3740), 68 states have internal predecessors, (3740), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:41:53,984 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 69 states, 69 states have (on average 86.0) internal successors, (5934), 69 states have internal predecessors, (5934), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:41:53,984 INFO L81 ComplementDD]: Finished complementDD. Result has 69 states, 69 states have (on average 86.0) internal successors, (5934), 69 states have internal predecessors, (5934), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:41:53,984 INFO L186 Difference]: Start difference. First operand has 1238 places, 3279 transitions, 153027 flow. Second operand 68 states and 3740 transitions. [2022-07-12 10:41:53,984 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 1299 places, 3516 transitions, 168736 flow [2022-07-12 10:42:03,999 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 1279 places, 3516 transitions, 167907 flow, removed 377 selfloop flow, removed 20 redundant places. [2022-07-12 10:42:04,148 INFO L242 Difference]: Finished difference. Result has 1294 places, 3376 transitions, 162484 flow [2022-07-12 10:42:04,150 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=86, PETRI_DIFFERENCE_MINUEND_FLOW=152262, PETRI_DIFFERENCE_MINUEND_PLACES=1212, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=3279, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2125, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=1139, PETRI_DIFFERENCE_SUBTRAHEND_STATES=68, PETRI_FLOW=162484, PETRI_PLACES=1294, PETRI_TRANSITIONS=3376} [2022-07-12 10:42:04,151 INFO L279 CegarLoopForPetriNet]: 76 programPoint places, 1218 predicate places. [2022-07-12 10:42:04,151 INFO L495 AbstractCegarLoop]: Abstraction has has 1294 places, 3376 transitions, 162484 flow [2022-07-12 10:42:04,151 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 32 states have (on average 52.84375) internal successors, (1691), 32 states have internal predecessors, (1691), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:42:04,151 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-12 10:42:04,151 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, 1, 1, 1, 1, 1, 1, 1] [2022-07-12 10:42:04,168 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Forceful destruction successful, exit code 0 [2022-07-12 10:42:04,367 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,28 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 10:42:04,367 INFO L420 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-12 10:42:04,368 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 10:42:04,368 INFO L85 PathProgramCache]: Analyzing trace with hash 1783545769, now seen corresponding path program 28 times [2022-07-12 10:42:04,368 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 10:42:04,368 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2006563733] [2022-07-12 10:42:04,368 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 10:42:04,368 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 10:42:04,375 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 10:42:04,530 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 10:42:04,531 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 10:42:04,531 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2006563733] [2022-07-12 10:42:04,531 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2006563733] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-12 10:42:04,531 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [179239739] [2022-07-12 10:42:04,531 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-07-12 10:42:04,531 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 10:42:04,531 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-12 10:42:04,532 INFO L229 MonitoredProcess]: Starting monitored process 29 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-12 10:42:04,532 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Waiting until timeout for monitored process [2022-07-12 10:42:04,583 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-07-12 10:42:04,583 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-12 10:42:04,584 INFO L263 TraceCheckSpWp]: Trace formula consists of 135 conjuncts, 20 conjunts are in the unsatisfiable core [2022-07-12 10:42:04,585 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-12 10:42:04,805 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 10:42:04,805 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-12 10:42:05,075 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 10:42:05,075 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [179239739] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-12 10:42:05,075 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-12 10:42:05,075 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15, 15] total 31 [2022-07-12 10:42:05,075 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2071914269] [2022-07-12 10:42:05,075 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-12 10:42:05,076 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2022-07-12 10:42:05,076 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 10:42:05,076 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2022-07-12 10:42:05,076 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=159, Invalid=771, Unknown=0, NotChecked=0, Total=930 [2022-07-12 10:42:05,077 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 51 out of 86 [2022-07-12 10:42:05,078 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 1294 places, 3376 transitions, 162484 flow. Second operand has 31 states, 31 states have (on average 52.87096774193548) internal successors, (1639), 31 states have internal predecessors, (1639), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:42:05,078 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-12 10:42:05,078 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 51 of 86 [2022-07-12 10:42:05,078 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-12 10:42:16,372 INFO L129 PetriNetUnfolder]: 2317/7088 cut-off events. [2022-07-12 10:42:16,372 INFO L130 PetriNetUnfolder]: For 727774/727779 co-relation queries the response was YES. [2022-07-12 10:42:16,521 INFO L84 FinitePrefix]: Finished finitePrefix Result has 126354 conditions, 7088 events. 2317/7088 cut-off events. For 727774/727779 co-relation queries the response was YES. Maximal size of possible extension queue 532. Compared 73516 event pairs, 102 based on Foata normal form. 5/7069 useless extension candidates. Maximal degree in co-relation 126033. Up to 3309 conditions per place. [2022-07-12 10:42:16,590 INFO L132 encePairwiseOnDemand]: 71/86 looper letters, 1605 selfloop transitions, 1997 changer transitions 6/3649 dead transitions. [2022-07-12 10:42:16,590 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 1315 places, 3649 transitions, 181678 flow [2022-07-12 10:42:16,590 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2022-07-12 10:42:16,590 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2022-07-12 10:42:16,591 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 1555 transitions. [2022-07-12 10:42:16,591 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.645764119601329 [2022-07-12 10:42:16,591 INFO L72 ComplementDD]: Start complementDD. Operand 28 states and 1555 transitions. [2022-07-12 10:42:16,591 INFO L73 IsDeterministic]: Start isDeterministic. Operand 28 states and 1555 transitions. [2022-07-12 10:42:16,591 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-12 10:42:16,591 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 28 states and 1555 transitions. [2022-07-12 10:42:16,592 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 29 states, 28 states have (on average 55.535714285714285) internal successors, (1555), 28 states have internal predecessors, (1555), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:42:16,593 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 29 states, 29 states have (on average 86.0) internal successors, (2494), 29 states have internal predecessors, (2494), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:42:16,593 INFO L81 ComplementDD]: Finished complementDD. Result has 29 states, 29 states have (on average 86.0) internal successors, (2494), 29 states have internal predecessors, (2494), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:42:16,593 INFO L186 Difference]: Start difference. First operand has 1294 places, 3376 transitions, 162484 flow. Second operand 28 states and 1555 transitions. [2022-07-12 10:42:16,594 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 1315 places, 3649 transitions, 181678 flow