./Ultimate.py --spec ../../../trunk/examples/svcomp/properties/unreach-call.prp --file ../../../trunk/examples/svcomp/weaver/popl20-nonblocking-cntr.wvr.c --full-output --traceabstraction.when.to.check.the.insufficient.erros.location.relative.to.the.other.error.locations TOGETHER --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version b8dbc81d Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerReach.xml -i ../../../trunk/examples/svcomp/weaver/popl20-nonblocking-cntr.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 c17307c3ae663be4a153b702602dea6d5ee45f14a080e7a1fb720e97140b770f --traceabstraction.when.to.check.the.insufficient.erros.location.relative.to.the.other.error.locations TOGETHER --- Real Ultimate output --- This is Ultimate 0.2.3-?-b8dbc81 [2023-08-31 03:34:27,447 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-08-31 03:34:27,449 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-08-31 03:34:27,491 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2023-08-31 03:34:27,491 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2023-08-31 03:34:27,494 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2023-08-31 03:34:27,496 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2023-08-31 03:34:27,499 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2023-08-31 03:34:27,503 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2023-08-31 03:34:27,507 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2023-08-31 03:34:27,508 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2023-08-31 03:34:27,510 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2023-08-31 03:34:27,510 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2023-08-31 03:34:27,512 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2023-08-31 03:34:27,514 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2023-08-31 03:34:27,517 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2023-08-31 03:34:27,518 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2023-08-31 03:34:27,519 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2023-08-31 03:34:27,522 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2023-08-31 03:34:27,527 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2023-08-31 03:34:27,528 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2023-08-31 03:34:27,529 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2023-08-31 03:34:27,530 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2023-08-31 03:34:27,530 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2023-08-31 03:34:27,537 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2023-08-31 03:34:27,537 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2023-08-31 03:34:27,538 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2023-08-31 03:34:27,539 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2023-08-31 03:34:27,540 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2023-08-31 03:34:27,540 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2023-08-31 03:34:27,541 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2023-08-31 03:34:27,542 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2023-08-31 03:34:27,544 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2023-08-31 03:34:27,544 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2023-08-31 03:34:27,545 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2023-08-31 03:34:27,545 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2023-08-31 03:34:27,546 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2023-08-31 03:34:27,546 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2023-08-31 03:34:27,546 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2023-08-31 03:34:27,547 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2023-08-31 03:34:27,548 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2023-08-31 03:34:27,549 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2023-08-31 03:34:27,585 INFO L113 SettingsManager]: Loading preferences was successful [2023-08-31 03:34:27,585 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-08-31 03:34:27,586 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-08-31 03:34:27,587 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-08-31 03:34:27,588 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-08-31 03:34:27,588 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-08-31 03:34:27,588 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-08-31 03:34:27,589 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2023-08-31 03:34:27,589 INFO L138 SettingsManager]: * Use SBE=true [2023-08-31 03:34:27,589 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-08-31 03:34:27,590 INFO L138 SettingsManager]: * sizeof long=4 [2023-08-31 03:34:27,590 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-08-31 03:34:27,590 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-08-31 03:34:27,590 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-08-31 03:34:27,591 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-08-31 03:34:27,591 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-08-31 03:34:27,591 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-08-31 03:34:27,591 INFO L138 SettingsManager]: * sizeof long double=12 [2023-08-31 03:34:27,592 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2023-08-31 03:34:27,592 INFO L138 SettingsManager]: * Use constant arrays=true [2023-08-31 03:34:27,592 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-08-31 03:34:27,592 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-08-31 03:34:27,592 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-08-31 03:34:27,593 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-08-31 03:34:27,593 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-31 03:34:27,593 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-08-31 03:34:27,593 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-08-31 03:34:27,594 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-08-31 03:34:27,594 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2023-08-31 03:34:27,594 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-08-31 03:34:27,594 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-08-31 03:34:27,595 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-08-31 03:34:27,595 INFO L138 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-08-31 03:34:27,595 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-08-31 03:34:27,595 INFO L138 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-08-31 03:34:27,596 INFO L138 SettingsManager]: * Looper check in Petri net analysis=SEMANTIC WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> c17307c3ae663be4a153b702602dea6d5ee45f14a080e7a1fb720e97140b770f Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: When to check the insufficient erros location relative to the other error locations -> TOGETHER [2023-08-31 03:34:27,929 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-08-31 03:34:27,952 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-08-31 03:34:27,955 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-08-31 03:34:27,957 INFO L271 PluginConnector]: Initializing CDTParser... [2023-08-31 03:34:27,957 INFO L275 PluginConnector]: CDTParser initialized [2023-08-31 03:34:27,958 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/weaver/popl20-nonblocking-cntr.wvr.c [2023-08-31 03:34:29,199 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-08-31 03:34:29,397 INFO L351 CDTParser]: Found 1 translation units. [2023-08-31 03:34:29,397 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/weaver/popl20-nonblocking-cntr.wvr.c [2023-08-31 03:34:29,403 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/83db92765/abb921ffedd0455d86f524b20f931b5e/FLAG8018d0b5d [2023-08-31 03:34:29,416 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/83db92765/abb921ffedd0455d86f524b20f931b5e [2023-08-31 03:34:29,418 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-08-31 03:34:29,419 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2023-08-31 03:34:29,420 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-08-31 03:34:29,420 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-08-31 03:34:29,426 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-08-31 03:34:29,427 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 31.08 03:34:29" (1/1) ... [2023-08-31 03:34:29,428 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1b13df89 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.08 03:34:29, skipping insertion in model container [2023-08-31 03:34:29,428 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 31.08 03:34:29" (1/1) ... [2023-08-31 03:34:29,433 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-08-31 03:34:29,449 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-08-31 03:34:29,562 WARN L247 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/weaver/popl20-nonblocking-cntr.wvr.c[2037,2050] [2023-08-31 03:34:29,565 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-31 03:34:29,572 INFO L203 MainTranslator]: Completed pre-run [2023-08-31 03:34:29,587 WARN L247 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/weaver/popl20-nonblocking-cntr.wvr.c[2037,2050] [2023-08-31 03:34:29,588 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-31 03:34:29,594 WARN L667 CHandler]: The function __VERIFIER_atomic_begin is called, but not defined or handled by StandardFunctionHandler. [2023-08-31 03:34:29,594 WARN L667 CHandler]: The function __VERIFIER_atomic_end is called, but not defined or handled by StandardFunctionHandler. [2023-08-31 03:34:29,600 INFO L208 MainTranslator]: Completed translation [2023-08-31 03:34:29,600 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.08 03:34:29 WrapperNode [2023-08-31 03:34:29,601 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-08-31 03:34:29,601 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-08-31 03:34:29,602 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-08-31 03:34:29,602 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2023-08-31 03:34:29,607 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.08 03:34:29" (1/1) ... [2023-08-31 03:34:29,614 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.08 03:34:29" (1/1) ... [2023-08-31 03:34:29,631 INFO L138 Inliner]: procedures = 21, calls = 24, calls flagged for inlining = 4, calls inlined = 4, statements flattened = 54 [2023-08-31 03:34:29,632 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-08-31 03:34:29,632 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-08-31 03:34:29,633 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2023-08-31 03:34:29,633 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2023-08-31 03:34:29,641 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.08 03:34:29" (1/1) ... [2023-08-31 03:34:29,641 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.08 03:34:29" (1/1) ... [2023-08-31 03:34:29,661 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.08 03:34:29" (1/1) ... [2023-08-31 03:34:29,662 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.08 03:34:29" (1/1) ... [2023-08-31 03:34:29,666 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.08 03:34:29" (1/1) ... [2023-08-31 03:34:29,669 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.08 03:34:29" (1/1) ... [2023-08-31 03:34:29,679 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.08 03:34:29" (1/1) ... [2023-08-31 03:34:29,680 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.08 03:34:29" (1/1) ... [2023-08-31 03:34:29,681 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-08-31 03:34:29,682 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-08-31 03:34:29,682 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2023-08-31 03:34:29,682 INFO L275 PluginConnector]: RCFGBuilder initialized [2023-08-31 03:34:29,683 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.08 03:34:29" (1/1) ... [2023-08-31 03:34:29,692 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-31 03:34:29,701 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-31 03:34:29,712 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-08-31 03:34:29,743 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-08-31 03:34:29,762 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-08-31 03:34:29,762 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2023-08-31 03:34:29,763 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2023-08-31 03:34:29,764 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2023-08-31 03:34:29,764 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2023-08-31 03:34:29,764 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-08-31 03:34:29,765 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-08-31 03:34:29,765 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-08-31 03:34:29,765 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2023-08-31 03:34:29,765 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2023-08-31 03:34:29,765 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-08-31 03:34:29,765 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-08-31 03:34:29,765 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-08-31 03:34:29,766 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-08-31 03:34:29,767 WARN L210 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement [2023-08-31 03:34:29,867 INFO L236 CfgBuilder]: Building ICFG [2023-08-31 03:34:29,870 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-08-31 03:34:30,116 INFO L277 CfgBuilder]: Performing block encoding [2023-08-31 03:34:30,146 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-08-31 03:34:30,146 INFO L302 CfgBuilder]: Removed 2 assume(true) statements. [2023-08-31 03:34:30,148 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 31.08 03:34:30 BoogieIcfgContainer [2023-08-31 03:34:30,148 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-08-31 03:34:30,150 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-08-31 03:34:30,150 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2023-08-31 03:34:30,153 INFO L275 PluginConnector]: TraceAbstraction initialized [2023-08-31 03:34:30,153 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 31.08 03:34:29" (1/3) ... [2023-08-31 03:34:30,154 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2cbfa130 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 31.08 03:34:30, skipping insertion in model container [2023-08-31 03:34:30,154 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.08 03:34:29" (2/3) ... [2023-08-31 03:34:30,155 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2cbfa130 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 31.08 03:34:30, skipping insertion in model container [2023-08-31 03:34:30,155 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 31.08 03:34:30" (3/3) ... [2023-08-31 03:34:30,156 INFO L112 eAbstractionObserver]: Analyzing ICFG popl20-nonblocking-cntr.wvr.c [2023-08-31 03:34:30,163 WARN L145 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2023-08-31 03:34:30,171 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-08-31 03:34:30,172 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-08-31 03:34:30,172 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-08-31 03:34:30,253 INFO L144 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2023-08-31 03:34:30,289 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 77 places, 76 transitions, 168 flow [2023-08-31 03:34:30,352 INFO L130 PetriNetUnfolder]: 6/74 cut-off events. [2023-08-31 03:34:30,353 INFO L131 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2023-08-31 03:34:30,357 INFO L83 FinitePrefix]: Finished finitePrefix Result has 83 conditions, 74 events. 6/74 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 3. Compared 44 event pairs, 0 based on Foata normal form. 0/67 useless extension candidates. Maximal degree in co-relation 44. Up to 2 conditions per place. [2023-08-31 03:34:30,358 INFO L82 GeneralOperation]: Start removeDead. Operand has 77 places, 76 transitions, 168 flow [2023-08-31 03:34:30,362 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 67 places, 66 transitions, 144 flow [2023-08-31 03:34:30,366 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-31 03:34:30,381 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 67 places, 66 transitions, 144 flow [2023-08-31 03:34:30,385 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 67 places, 66 transitions, 144 flow [2023-08-31 03:34:30,385 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 67 places, 66 transitions, 144 flow [2023-08-31 03:34:30,415 INFO L130 PetriNetUnfolder]: 6/66 cut-off events. [2023-08-31 03:34:30,415 INFO L131 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2023-08-31 03:34:30,416 INFO L83 FinitePrefix]: Finished finitePrefix Result has 75 conditions, 66 events. 6/66 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 3. Compared 41 event pairs, 0 based on Foata normal form. 0/60 useless extension candidates. Maximal degree in co-relation 44. Up to 2 conditions per place. [2023-08-31 03:34:30,417 INFO L119 LiptonReduction]: Number of co-enabled transitions 404 [2023-08-31 03:34:32,546 INFO L134 LiptonReduction]: Checked pairs total: 413 [2023-08-31 03:34:32,547 INFO L136 LiptonReduction]: Total number of compositions: 61 [2023-08-31 03:34:32,557 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-08-31 03:34:32,562 INFO L357 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mPorIndependenceSettings=[Lde.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings;@75bdce25, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-31 03:34:32,562 INFO L358 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2023-08-31 03:34:32,566 INFO L130 PetriNetUnfolder]: 2/14 cut-off events. [2023-08-31 03:34:32,566 INFO L131 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2023-08-31 03:34:32,566 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 03:34:32,567 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-31 03:34:32,567 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-31 03:34:32,571 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 03:34:32,571 INFO L85 PathProgramCache]: Analyzing trace with hash 1270362665, now seen corresponding path program 1 times [2023-08-31 03:34:32,578 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-31 03:34:32,579 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2007162013] [2023-08-31 03:34:32,579 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 03:34:32,579 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-31 03:34:32,684 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-31 03:34:32,919 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-31 03:34:32,921 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-31 03:34:32,921 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2007162013] [2023-08-31 03:34:32,922 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2007162013] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-31 03:34:32,922 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-31 03:34:32,922 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-08-31 03:34:32,923 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [822547517] [2023-08-31 03:34:32,924 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-31 03:34:32,930 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-08-31 03:34:32,935 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-31 03:34:32,954 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-08-31 03:34:32,955 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-08-31 03:34:32,977 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 61 out of 137 [2023-08-31 03:34:32,979 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 20 places, 15 transitions, 42 flow. Second operand has 4 states, 4 states have (on average 64.0) internal successors, (256), 4 states have internal predecessors, (256), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 03:34:32,980 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-31 03:34:32,980 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 61 of 137 [2023-08-31 03:34:32,981 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-31 03:34:33,025 INFO L130 PetriNetUnfolder]: 59/100 cut-off events. [2023-08-31 03:34:33,025 INFO L131 PetriNetUnfolder]: For 12/12 co-relation queries the response was YES. [2023-08-31 03:34:33,025 INFO L83 FinitePrefix]: Finished finitePrefix Result has 216 conditions, 100 events. 59/100 cut-off events. For 12/12 co-relation queries the response was YES. Maximal size of possible extension queue 10. Compared 251 event pairs, 23 based on Foata normal form. 0/72 useless extension candidates. Maximal degree in co-relation 165. Up to 78 conditions per place. [2023-08-31 03:34:33,027 INFO L137 encePairwiseOnDemand]: 133/137 looper letters, 17 selfloop transitions, 3 changer transitions 0/21 dead transitions. [2023-08-31 03:34:33,027 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 23 places, 21 transitions, 97 flow [2023-08-31 03:34:33,028 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-31 03:34:33,029 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-31 03:34:33,035 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 265 transitions. [2023-08-31 03:34:33,037 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4835766423357664 [2023-08-31 03:34:33,037 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 265 transitions. [2023-08-31 03:34:33,037 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 265 transitions. [2023-08-31 03:34:33,039 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-31 03:34:33,041 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 265 transitions. [2023-08-31 03:34:33,043 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 66.25) internal successors, (265), 4 states have internal predecessors, (265), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 03:34:33,048 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 137.0) internal successors, (685), 5 states have internal predecessors, (685), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 03:34:33,048 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 137.0) internal successors, (685), 5 states have internal predecessors, (685), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 03:34:33,049 INFO L175 Difference]: Start difference. First operand has 20 places, 15 transitions, 42 flow. Second operand 4 states and 265 transitions. [2023-08-31 03:34:33,050 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 23 places, 21 transitions, 97 flow [2023-08-31 03:34:33,052 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 19 places, 21 transitions, 87 flow, removed 0 selfloop flow, removed 4 redundant places. [2023-08-31 03:34:33,053 INFO L231 Difference]: Finished difference. Result has 20 places, 16 transitions, 48 flow [2023-08-31 03:34:33,055 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=137, PETRI_DIFFERENCE_MINUEND_FLOW=34, PETRI_DIFFERENCE_MINUEND_PLACES=16, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=15, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=12, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=48, PETRI_PLACES=20, PETRI_TRANSITIONS=16} [2023-08-31 03:34:33,057 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 0 predicate places. [2023-08-31 03:34:33,057 INFO L495 AbstractCegarLoop]: Abstraction has has 20 places, 16 transitions, 48 flow [2023-08-31 03:34:33,058 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 64.0) internal successors, (256), 4 states have internal predecessors, (256), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 03:34:33,058 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 03:34:33,058 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-31 03:34:33,058 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-08-31 03:34:33,059 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-31 03:34:33,059 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 03:34:33,059 INFO L85 PathProgramCache]: Analyzing trace with hash 33938299, now seen corresponding path program 1 times [2023-08-31 03:34:33,059 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-31 03:34:33,060 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1297938282] [2023-08-31 03:34:33,060 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 03:34:33,060 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-31 03:34:33,076 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-31 03:34:33,134 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-31 03:34:33,135 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-31 03:34:33,135 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1297938282] [2023-08-31 03:34:33,135 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1297938282] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-31 03:34:33,135 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-31 03:34:33,136 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-08-31 03:34:33,136 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1908047474] [2023-08-31 03:34:33,136 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-31 03:34:33,137 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-31 03:34:33,137 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-31 03:34:33,138 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-31 03:34:33,138 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-08-31 03:34:33,156 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 58 out of 137 [2023-08-31 03:34:33,156 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 20 places, 16 transitions, 48 flow. Second operand has 5 states, 5 states have (on average 60.8) internal successors, (304), 5 states have internal predecessors, (304), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 03:34:33,157 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-31 03:34:33,157 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 58 of 137 [2023-08-31 03:34:33,157 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-31 03:34:33,268 INFO L130 PetriNetUnfolder]: 86/161 cut-off events. [2023-08-31 03:34:33,268 INFO L131 PetriNetUnfolder]: For 59/59 co-relation queries the response was YES. [2023-08-31 03:34:33,269 INFO L83 FinitePrefix]: Finished finitePrefix Result has 403 conditions, 161 events. 86/161 cut-off events. For 59/59 co-relation queries the response was YES. Maximal size of possible extension queue 13. Compared 484 event pairs, 33 based on Foata normal form. 4/131 useless extension candidates. Maximal degree in co-relation 89. Up to 93 conditions per place. [2023-08-31 03:34:33,270 INFO L137 encePairwiseOnDemand]: 132/137 looper letters, 30 selfloop transitions, 3 changer transitions 6/39 dead transitions. [2023-08-31 03:34:33,270 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 24 places, 39 transitions, 197 flow [2023-08-31 03:34:33,271 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-08-31 03:34:33,271 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-08-31 03:34:33,272 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 327 transitions. [2023-08-31 03:34:33,273 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.47737226277372263 [2023-08-31 03:34:33,273 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 327 transitions. [2023-08-31 03:34:33,273 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 327 transitions. [2023-08-31 03:34:33,274 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-31 03:34:33,274 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 327 transitions. [2023-08-31 03:34:33,276 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 65.4) internal successors, (327), 5 states have internal predecessors, (327), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 03:34:33,278 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 137.0) internal successors, (822), 6 states have internal predecessors, (822), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 03:34:33,279 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 137.0) internal successors, (822), 6 states have internal predecessors, (822), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 03:34:33,279 INFO L175 Difference]: Start difference. First operand has 20 places, 16 transitions, 48 flow. Second operand 5 states and 327 transitions. [2023-08-31 03:34:33,279 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 24 places, 39 transitions, 197 flow [2023-08-31 03:34:33,280 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 22 places, 39 transitions, 183 flow, removed 3 selfloop flow, removed 2 redundant places. [2023-08-31 03:34:33,281 INFO L231 Difference]: Finished difference. Result has 25 places, 18 transitions, 64 flow [2023-08-31 03:34:33,281 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=137, PETRI_DIFFERENCE_MINUEND_FLOW=42, PETRI_DIFFERENCE_MINUEND_PLACES=18, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=16, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=13, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=64, PETRI_PLACES=25, PETRI_TRANSITIONS=18} [2023-08-31 03:34:33,282 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 5 predicate places. [2023-08-31 03:34:33,282 INFO L495 AbstractCegarLoop]: Abstraction has has 25 places, 18 transitions, 64 flow [2023-08-31 03:34:33,283 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 60.8) internal successors, (304), 5 states have internal predecessors, (304), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 03:34:33,283 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 03:34:33,283 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-31 03:34:33,283 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-08-31 03:34:33,283 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-31 03:34:33,284 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 03:34:33,284 INFO L85 PathProgramCache]: Analyzing trace with hash -1659358149, now seen corresponding path program 2 times [2023-08-31 03:34:33,284 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-31 03:34:33,284 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1532621740] [2023-08-31 03:34:33,285 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 03:34:33,285 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-31 03:34:33,298 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-31 03:34:33,362 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-31 03:34:33,362 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-31 03:34:33,363 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1532621740] [2023-08-31 03:34:33,363 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1532621740] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-31 03:34:33,363 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [15940719] [2023-08-31 03:34:33,363 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-08-31 03:34:33,363 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-31 03:34:33,364 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-31 03:34:33,366 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-31 03:34:33,387 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-08-31 03:34:33,425 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2023-08-31 03:34:33,425 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-31 03:34:33,426 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 7 conjunts are in the unsatisfiable core [2023-08-31 03:34:33,429 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-31 03:34:33,495 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-31 03:34:33,495 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-31 03:34:33,496 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [15940719] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-31 03:34:33,496 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-08-31 03:34:33,496 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [3] total 5 [2023-08-31 03:34:33,496 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [777238726] [2023-08-31 03:34:33,496 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-31 03:34:33,497 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-08-31 03:34:33,497 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-31 03:34:33,498 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-08-31 03:34:33,498 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2023-08-31 03:34:33,536 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 60 out of 137 [2023-08-31 03:34:33,537 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 25 places, 18 transitions, 64 flow. Second operand has 4 states, 4 states have (on average 63.25) internal successors, (253), 4 states have internal predecessors, (253), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 03:34:33,537 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-31 03:34:33,537 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 60 of 137 [2023-08-31 03:34:33,537 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-31 03:34:33,574 INFO L130 PetriNetUnfolder]: 51/94 cut-off events. [2023-08-31 03:34:33,574 INFO L131 PetriNetUnfolder]: For 52/59 co-relation queries the response was YES. [2023-08-31 03:34:33,586 INFO L83 FinitePrefix]: Finished finitePrefix Result has 272 conditions, 94 events. 51/94 cut-off events. For 52/59 co-relation queries the response was YES. Maximal size of possible extension queue 8. Compared 228 event pairs, 24 based on Foata normal form. 15/89 useless extension candidates. Maximal degree in co-relation 133. Up to 73 conditions per place. [2023-08-31 03:34:33,587 INFO L137 encePairwiseOnDemand]: 133/137 looper letters, 19 selfloop transitions, 3 changer transitions 0/23 dead transitions. [2023-08-31 03:34:33,587 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 26 places, 23 transitions, 121 flow [2023-08-31 03:34:33,588 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-31 03:34:33,588 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-31 03:34:33,589 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 261 transitions. [2023-08-31 03:34:33,589 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4762773722627737 [2023-08-31 03:34:33,589 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 261 transitions. [2023-08-31 03:34:33,589 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 261 transitions. [2023-08-31 03:34:33,590 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-31 03:34:33,590 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 261 transitions. [2023-08-31 03:34:33,591 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 65.25) internal successors, (261), 4 states have internal predecessors, (261), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 03:34:33,592 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 137.0) internal successors, (685), 5 states have internal predecessors, (685), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 03:34:33,593 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 137.0) internal successors, (685), 5 states have internal predecessors, (685), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 03:34:33,593 INFO L175 Difference]: Start difference. First operand has 25 places, 18 transitions, 64 flow. Second operand 4 states and 261 transitions. [2023-08-31 03:34:33,593 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 26 places, 23 transitions, 121 flow [2023-08-31 03:34:33,594 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 23 places, 23 transitions, 111 flow, removed 4 selfloop flow, removed 3 redundant places. [2023-08-31 03:34:33,594 INFO L231 Difference]: Finished difference. Result has 23 places, 17 transitions, 56 flow [2023-08-31 03:34:33,594 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=137, PETRI_DIFFERENCE_MINUEND_FLOW=50, PETRI_DIFFERENCE_MINUEND_PLACES=20, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=17, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=14, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=56, PETRI_PLACES=23, PETRI_TRANSITIONS=17} [2023-08-31 03:34:33,595 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 3 predicate places. [2023-08-31 03:34:33,595 INFO L495 AbstractCegarLoop]: Abstraction has has 23 places, 17 transitions, 56 flow [2023-08-31 03:34:33,596 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 63.25) internal successors, (253), 4 states have internal predecessors, (253), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 03:34:33,596 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 03:34:33,596 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-31 03:34:33,609 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-08-31 03:34:33,796 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-31 03:34:33,797 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-31 03:34:33,797 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 03:34:33,798 INFO L85 PathProgramCache]: Analyzing trace with hash 479227940, now seen corresponding path program 1 times [2023-08-31 03:34:33,798 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-31 03:34:33,798 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1590676390] [2023-08-31 03:34:33,798 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 03:34:33,798 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-31 03:34:33,827 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-31 03:34:33,964 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-31 03:34:33,966 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-31 03:34:33,968 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1590676390] [2023-08-31 03:34:33,968 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1590676390] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-31 03:34:33,969 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1467041599] [2023-08-31 03:34:33,969 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 03:34:33,969 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-31 03:34:33,970 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-31 03:34:33,973 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-31 03:34:33,998 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-08-31 03:34:34,039 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-31 03:34:34,041 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 10 conjunts are in the unsatisfiable core [2023-08-31 03:34:34,042 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-31 03:34:34,097 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-31 03:34:34,097 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-31 03:34:34,305 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-31 03:34:34,305 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1467041599] provided 1 perfect and 1 imperfect interpolant sequences [2023-08-31 03:34:34,305 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2023-08-31 03:34:34,306 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [2, 2] total 4 [2023-08-31 03:34:34,306 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1856271216] [2023-08-31 03:34:34,306 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-31 03:34:34,307 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-31 03:34:34,308 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-31 03:34:34,309 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-31 03:34:34,309 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2023-08-31 03:34:34,316 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 64 out of 137 [2023-08-31 03:34:34,317 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 23 places, 17 transitions, 56 flow. Second operand has 5 states, 5 states have (on average 66.6) internal successors, (333), 5 states have internal predecessors, (333), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 03:34:34,317 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-31 03:34:34,317 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 64 of 137 [2023-08-31 03:34:34,317 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-31 03:34:34,380 INFO L130 PetriNetUnfolder]: 84/156 cut-off events. [2023-08-31 03:34:34,380 INFO L131 PetriNetUnfolder]: For 28/47 co-relation queries the response was YES. [2023-08-31 03:34:34,381 INFO L83 FinitePrefix]: Finished finitePrefix Result has 413 conditions, 156 events. 84/156 cut-off events. For 28/47 co-relation queries the response was YES. Maximal size of possible extension queue 16. Compared 486 event pairs, 6 based on Foata normal form. 20/135 useless extension candidates. Maximal degree in co-relation 147. Up to 61 conditions per place. [2023-08-31 03:34:34,382 INFO L137 encePairwiseOnDemand]: 133/137 looper letters, 28 selfloop transitions, 6 changer transitions 4/40 dead transitions. [2023-08-31 03:34:34,382 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 26 places, 40 transitions, 200 flow [2023-08-31 03:34:34,382 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-31 03:34:34,383 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-31 03:34:34,383 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 291 transitions. [2023-08-31 03:34:34,384 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.531021897810219 [2023-08-31 03:34:34,384 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 291 transitions. [2023-08-31 03:34:34,384 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 291 transitions. [2023-08-31 03:34:34,384 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-31 03:34:34,385 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 291 transitions. [2023-08-31 03:34:34,386 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 72.75) internal successors, (291), 4 states have internal predecessors, (291), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 03:34:34,387 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 137.0) internal successors, (685), 5 states have internal predecessors, (685), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 03:34:34,388 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 137.0) internal successors, (685), 5 states have internal predecessors, (685), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 03:34:34,388 INFO L175 Difference]: Start difference. First operand has 23 places, 17 transitions, 56 flow. Second operand 4 states and 291 transitions. [2023-08-31 03:34:34,388 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 26 places, 40 transitions, 200 flow [2023-08-31 03:34:34,389 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 23 places, 40 transitions, 194 flow, removed 0 selfloop flow, removed 3 redundant places. [2023-08-31 03:34:34,390 INFO L231 Difference]: Finished difference. Result has 25 places, 21 transitions, 94 flow [2023-08-31 03:34:34,390 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=137, PETRI_DIFFERENCE_MINUEND_FLOW=50, PETRI_DIFFERENCE_MINUEND_PLACES=20, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=17, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=12, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=94, PETRI_PLACES=25, PETRI_TRANSITIONS=21} [2023-08-31 03:34:34,390 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 5 predicate places. [2023-08-31 03:34:34,391 INFO L495 AbstractCegarLoop]: Abstraction has has 25 places, 21 transitions, 94 flow [2023-08-31 03:34:34,391 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 66.6) internal successors, (333), 5 states have internal predecessors, (333), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 03:34:34,391 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 03:34:34,391 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-31 03:34:34,400 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-08-31 03:34:34,597 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3 [2023-08-31 03:34:34,598 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-31 03:34:34,598 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 03:34:34,598 INFO L85 PathProgramCache]: Analyzing trace with hash 1994220820, now seen corresponding path program 2 times [2023-08-31 03:34:34,598 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-31 03:34:34,599 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [473771727] [2023-08-31 03:34:34,599 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 03:34:34,599 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-31 03:34:34,610 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-31 03:34:34,645 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-31 03:34:34,645 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-31 03:34:34,646 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [473771727] [2023-08-31 03:34:34,646 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [473771727] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-31 03:34:34,646 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1457627665] [2023-08-31 03:34:34,646 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-08-31 03:34:34,646 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-31 03:34:34,647 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-31 03:34:34,650 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-31 03:34:34,651 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-08-31 03:34:34,710 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-08-31 03:34:34,711 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-31 03:34:34,713 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 9 conjunts are in the unsatisfiable core [2023-08-31 03:34:34,715 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-31 03:34:34,774 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-31 03:34:34,774 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-31 03:34:34,885 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-31 03:34:34,886 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1457627665] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-31 03:34:34,886 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-31 03:34:34,886 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 4, 4] total 8 [2023-08-31 03:34:34,886 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [142683923] [2023-08-31 03:34:34,887 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-31 03:34:34,887 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2023-08-31 03:34:34,887 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-31 03:34:34,888 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2023-08-31 03:34:34,888 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2023-08-31 03:34:34,935 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 59 out of 137 [2023-08-31 03:34:34,936 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 25 places, 21 transitions, 94 flow. Second operand has 9 states, 9 states have (on average 62.111111111111114) internal successors, (559), 9 states have internal predecessors, (559), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 03:34:34,936 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-31 03:34:34,936 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 59 of 137 [2023-08-31 03:34:34,936 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-31 03:34:35,038 INFO L130 PetriNetUnfolder]: 132/239 cut-off events. [2023-08-31 03:34:35,038 INFO L131 PetriNetUnfolder]: For 231/243 co-relation queries the response was YES. [2023-08-31 03:34:35,039 INFO L83 FinitePrefix]: Finished finitePrefix Result has 770 conditions, 239 events. 132/239 cut-off events. For 231/243 co-relation queries the response was YES. Maximal size of possible extension queue 20. Compared 757 event pairs, 32 based on Foata normal form. 26/264 useless extension candidates. Maximal degree in co-relation 232. Up to 190 conditions per place. [2023-08-31 03:34:35,040 INFO L137 encePairwiseOnDemand]: 132/137 looper letters, 30 selfloop transitions, 8 changer transitions 0/39 dead transitions. [2023-08-31 03:34:35,041 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 29 places, 39 transitions, 247 flow [2023-08-31 03:34:35,042 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-08-31 03:34:35,042 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-08-31 03:34:35,043 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 325 transitions. [2023-08-31 03:34:35,044 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4744525547445255 [2023-08-31 03:34:35,044 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 325 transitions. [2023-08-31 03:34:35,044 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 325 transitions. [2023-08-31 03:34:35,044 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-31 03:34:35,044 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 325 transitions. [2023-08-31 03:34:35,045 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 65.0) internal successors, (325), 5 states have internal predecessors, (325), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 03:34:35,047 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 137.0) internal successors, (822), 6 states have internal predecessors, (822), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 03:34:35,047 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 137.0) internal successors, (822), 6 states have internal predecessors, (822), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 03:34:35,048 INFO L175 Difference]: Start difference. First operand has 25 places, 21 transitions, 94 flow. Second operand 5 states and 325 transitions. [2023-08-31 03:34:35,048 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 29 places, 39 transitions, 247 flow [2023-08-31 03:34:35,049 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 29 places, 39 transitions, 247 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-08-31 03:34:35,050 INFO L231 Difference]: Finished difference. Result has 32 places, 27 transitions, 168 flow [2023-08-31 03:34:35,050 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=137, PETRI_DIFFERENCE_MINUEND_FLOW=94, PETRI_DIFFERENCE_MINUEND_PLACES=25, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=21, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=14, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=168, PETRI_PLACES=32, PETRI_TRANSITIONS=27} [2023-08-31 03:34:35,051 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 12 predicate places. [2023-08-31 03:34:35,051 INFO L495 AbstractCegarLoop]: Abstraction has has 32 places, 27 transitions, 168 flow [2023-08-31 03:34:35,052 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 62.111111111111114) internal successors, (559), 9 states have internal predecessors, (559), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 03:34:35,052 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 03:34:35,052 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-31 03:34:35,071 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2023-08-31 03:34:35,268 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-31 03:34:35,268 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-31 03:34:35,269 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 03:34:35,269 INFO L85 PathProgramCache]: Analyzing trace with hash 157752969, now seen corresponding path program 3 times [2023-08-31 03:34:35,269 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-31 03:34:35,269 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1117793240] [2023-08-31 03:34:35,269 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 03:34:35,270 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-31 03:34:35,281 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-31 03:34:35,385 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-31 03:34:35,386 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-31 03:34:35,386 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1117793240] [2023-08-31 03:34:35,386 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1117793240] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-31 03:34:35,386 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [685066297] [2023-08-31 03:34:35,387 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-08-31 03:34:35,387 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-31 03:34:35,387 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-31 03:34:35,388 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-31 03:34:35,412 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-08-31 03:34:35,456 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2023-08-31 03:34:35,456 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-31 03:34:35,459 INFO L263 TraceCheckSpWp]: Trace formula consists of 122 conjuncts, 9 conjunts are in the unsatisfiable core [2023-08-31 03:34:35,460 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-31 03:34:35,534 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-31 03:34:35,534 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-31 03:34:35,696 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-31 03:34:35,697 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [685066297] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-31 03:34:35,697 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-31 03:34:35,697 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 16 [2023-08-31 03:34:35,697 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1816025799] [2023-08-31 03:34:35,697 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-31 03:34:35,698 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2023-08-31 03:34:35,698 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-31 03:34:35,699 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2023-08-31 03:34:35,700 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=181, Unknown=0, NotChecked=0, Total=240 [2023-08-31 03:34:35,776 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 55 out of 137 [2023-08-31 03:34:35,778 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 32 places, 27 transitions, 168 flow. Second operand has 16 states, 16 states have (on average 57.4375) internal successors, (919), 16 states have internal predecessors, (919), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 03:34:35,778 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-31 03:34:35,778 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 55 of 137 [2023-08-31 03:34:35,778 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-31 03:34:36,197 INFO L130 PetriNetUnfolder]: 216/388 cut-off events. [2023-08-31 03:34:36,198 INFO L131 PetriNetUnfolder]: For 595/595 co-relation queries the response was YES. [2023-08-31 03:34:36,200 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1464 conditions, 388 events. 216/388 cut-off events. For 595/595 co-relation queries the response was YES. Maximal size of possible extension queue 31. Compared 1459 event pairs, 4 based on Foata normal form. 12/400 useless extension candidates. Maximal degree in co-relation 775. Up to 135 conditions per place. [2023-08-31 03:34:36,202 INFO L137 encePairwiseOnDemand]: 130/137 looper letters, 64 selfloop transitions, 29 changer transitions 10/103 dead transitions. [2023-08-31 03:34:36,202 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 47 places, 103 transitions, 687 flow [2023-08-31 03:34:36,202 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2023-08-31 03:34:36,202 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2023-08-31 03:34:36,205 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 977 transitions. [2023-08-31 03:34:36,206 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44571167883211676 [2023-08-31 03:34:36,206 INFO L72 ComplementDD]: Start complementDD. Operand 16 states and 977 transitions. [2023-08-31 03:34:36,206 INFO L73 IsDeterministic]: Start isDeterministic. Operand 16 states and 977 transitions. [2023-08-31 03:34:36,207 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-31 03:34:36,207 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 16 states and 977 transitions. [2023-08-31 03:34:36,209 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 17 states, 16 states have (on average 61.0625) internal successors, (977), 16 states have internal predecessors, (977), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 03:34:36,213 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 17 states, 17 states have (on average 137.0) internal successors, (2329), 17 states have internal predecessors, (2329), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 03:34:36,215 INFO L81 ComplementDD]: Finished complementDD. Result has 17 states, 17 states have (on average 137.0) internal successors, (2329), 17 states have internal predecessors, (2329), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 03:34:36,215 INFO L175 Difference]: Start difference. First operand has 32 places, 27 transitions, 168 flow. Second operand 16 states and 977 transitions. [2023-08-31 03:34:36,215 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 47 places, 103 transitions, 687 flow [2023-08-31 03:34:36,220 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 46 places, 103 transitions, 677 flow, removed 2 selfloop flow, removed 1 redundant places. [2023-08-31 03:34:36,221 INFO L231 Difference]: Finished difference. Result has 52 places, 43 transitions, 380 flow [2023-08-31 03:34:36,221 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=137, PETRI_DIFFERENCE_MINUEND_FLOW=158, PETRI_DIFFERENCE_MINUEND_PLACES=31, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=27, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=13, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=9, PETRI_DIFFERENCE_SUBTRAHEND_STATES=16, PETRI_FLOW=380, PETRI_PLACES=52, PETRI_TRANSITIONS=43} [2023-08-31 03:34:36,225 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 32 predicate places. [2023-08-31 03:34:36,225 INFO L495 AbstractCegarLoop]: Abstraction has has 52 places, 43 transitions, 380 flow [2023-08-31 03:34:36,225 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 57.4375) internal successors, (919), 16 states have internal predecessors, (919), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 03:34:36,226 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 03:34:36,226 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-31 03:34:36,237 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2023-08-31 03:34:36,436 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-31 03:34:36,436 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-31 03:34:36,437 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 03:34:36,437 INFO L85 PathProgramCache]: Analyzing trace with hash -1226601811, now seen corresponding path program 4 times [2023-08-31 03:34:36,437 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-31 03:34:36,437 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [574248854] [2023-08-31 03:34:36,437 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 03:34:36,437 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-31 03:34:36,448 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-31 03:34:36,541 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-31 03:34:36,542 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-31 03:34:36,546 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [574248854] [2023-08-31 03:34:36,546 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [574248854] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-31 03:34:36,546 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2011954] [2023-08-31 03:34:36,546 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-08-31 03:34:36,547 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-31 03:34:36,547 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-31 03:34:36,548 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-31 03:34:36,551 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-08-31 03:34:36,600 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-08-31 03:34:36,600 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-31 03:34:36,601 INFO L263 TraceCheckSpWp]: Trace formula consists of 55 conjuncts, 6 conjunts are in the unsatisfiable core [2023-08-31 03:34:36,602 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-31 03:34:36,719 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-31 03:34:36,720 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-31 03:34:36,795 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-31 03:34:36,796 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2011954] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-31 03:34:36,796 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-31 03:34:36,796 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 15 [2023-08-31 03:34:36,796 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1543553951] [2023-08-31 03:34:36,796 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-31 03:34:36,797 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2023-08-31 03:34:36,797 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-31 03:34:36,798 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2023-08-31 03:34:36,798 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=161, Unknown=0, NotChecked=0, Total=210 [2023-08-31 03:34:36,871 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 55 out of 137 [2023-08-31 03:34:36,872 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 52 places, 43 transitions, 380 flow. Second operand has 15 states, 15 states have (on average 57.4) internal successors, (861), 15 states have internal predecessors, (861), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 03:34:36,873 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-31 03:34:36,873 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 55 of 137 [2023-08-31 03:34:36,873 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-31 03:34:37,242 INFO L130 PetriNetUnfolder]: 297/535 cut-off events. [2023-08-31 03:34:37,242 INFO L131 PetriNetUnfolder]: For 2550/2550 co-relation queries the response was YES. [2023-08-31 03:34:37,244 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2580 conditions, 535 events. 297/535 cut-off events. For 2550/2550 co-relation queries the response was YES. Maximal size of possible extension queue 42. Compared 2218 event pairs, 21 based on Foata normal form. 38/573 useless extension candidates. Maximal degree in co-relation 1688. Up to 290 conditions per place. [2023-08-31 03:34:37,247 INFO L137 encePairwiseOnDemand]: 130/137 looper letters, 78 selfloop transitions, 40 changer transitions 1/119 dead transitions. [2023-08-31 03:34:37,247 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 68 places, 119 transitions, 1099 flow [2023-08-31 03:34:37,248 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2023-08-31 03:34:37,248 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2023-08-31 03:34:37,250 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 1026 transitions. [2023-08-31 03:34:37,251 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44053241734650067 [2023-08-31 03:34:37,251 INFO L72 ComplementDD]: Start complementDD. Operand 17 states and 1026 transitions. [2023-08-31 03:34:37,251 INFO L73 IsDeterministic]: Start isDeterministic. Operand 17 states and 1026 transitions. [2023-08-31 03:34:37,252 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-31 03:34:37,252 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 17 states and 1026 transitions. [2023-08-31 03:34:37,255 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 18 states, 17 states have (on average 60.35294117647059) internal successors, (1026), 17 states have internal predecessors, (1026), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 03:34:37,258 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 18 states, 18 states have (on average 137.0) internal successors, (2466), 18 states have internal predecessors, (2466), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 03:34:37,259 INFO L81 ComplementDD]: Finished complementDD. Result has 18 states, 18 states have (on average 137.0) internal successors, (2466), 18 states have internal predecessors, (2466), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 03:34:37,259 INFO L175 Difference]: Start difference. First operand has 52 places, 43 transitions, 380 flow. Second operand 17 states and 1026 transitions. [2023-08-31 03:34:37,259 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 68 places, 119 transitions, 1099 flow [2023-08-31 03:34:37,265 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 63 places, 119 transitions, 994 flow, removed 41 selfloop flow, removed 5 redundant places. [2023-08-31 03:34:37,267 INFO L231 Difference]: Finished difference. Result has 70 places, 68 transitions, 683 flow [2023-08-31 03:34:37,267 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=137, PETRI_DIFFERENCE_MINUEND_FLOW=329, PETRI_DIFFERENCE_MINUEND_PLACES=47, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=43, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=19, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=19, PETRI_DIFFERENCE_SUBTRAHEND_STATES=17, PETRI_FLOW=683, PETRI_PLACES=70, PETRI_TRANSITIONS=68} [2023-08-31 03:34:37,268 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 50 predicate places. [2023-08-31 03:34:37,268 INFO L495 AbstractCegarLoop]: Abstraction has has 70 places, 68 transitions, 683 flow [2023-08-31 03:34:37,269 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 57.4) internal successors, (861), 15 states have internal predecessors, (861), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 03:34:37,269 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 03:34:37,269 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-31 03:34:37,275 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2023-08-31 03:34:37,475 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-31 03:34:37,475 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-31 03:34:37,475 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 03:34:37,475 INFO L85 PathProgramCache]: Analyzing trace with hash -1808193385, now seen corresponding path program 5 times [2023-08-31 03:34:37,476 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-31 03:34:37,476 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1302784841] [2023-08-31 03:34:37,476 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 03:34:37,476 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-31 03:34:37,500 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-31 03:34:37,636 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-31 03:34:37,636 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-31 03:34:37,636 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1302784841] [2023-08-31 03:34:37,636 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1302784841] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-31 03:34:37,637 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2130713367] [2023-08-31 03:34:37,637 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-08-31 03:34:37,637 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-31 03:34:37,637 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-31 03:34:37,638 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-31 03:34:37,641 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2023-08-31 03:34:37,695 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-08-31 03:34:37,695 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-31 03:34:37,696 INFO L263 TraceCheckSpWp]: Trace formula consists of 124 conjuncts, 13 conjunts are in the unsatisfiable core [2023-08-31 03:34:37,697 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-31 03:34:37,744 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-31 03:34:37,745 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-31 03:34:37,934 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 3 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-31 03:34:37,934 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2130713367] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-31 03:34:37,934 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-31 03:34:37,935 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 5] total 7 [2023-08-31 03:34:37,935 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1755039237] [2023-08-31 03:34:37,935 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-31 03:34:37,935 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2023-08-31 03:34:37,936 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-31 03:34:37,936 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2023-08-31 03:34:37,936 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=47, Unknown=0, NotChecked=0, Total=72 [2023-08-31 03:34:37,945 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 64 out of 137 [2023-08-31 03:34:37,946 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 70 places, 68 transitions, 683 flow. Second operand has 9 states, 9 states have (on average 67.0) internal successors, (603), 9 states have internal predecessors, (603), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 03:34:37,946 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-31 03:34:37,947 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 64 of 137 [2023-08-31 03:34:37,947 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-31 03:34:38,107 INFO L130 PetriNetUnfolder]: 395/719 cut-off events. [2023-08-31 03:34:38,108 INFO L131 PetriNetUnfolder]: For 5748/5772 co-relation queries the response was YES. [2023-08-31 03:34:38,111 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4151 conditions, 719 events. 395/719 cut-off events. For 5748/5772 co-relation queries the response was YES. Maximal size of possible extension queue 65. Compared 3385 event pairs, 44 based on Foata normal form. 13/722 useless extension candidates. Maximal degree in co-relation 3028. Up to 352 conditions per place. [2023-08-31 03:34:38,115 INFO L137 encePairwiseOnDemand]: 133/137 looper letters, 71 selfloop transitions, 32 changer transitions 7/117 dead transitions. [2023-08-31 03:34:38,116 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 74 places, 117 transitions, 1313 flow [2023-08-31 03:34:38,116 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-08-31 03:34:38,116 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-08-31 03:34:38,117 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 366 transitions. [2023-08-31 03:34:38,118 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5343065693430656 [2023-08-31 03:34:38,118 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 366 transitions. [2023-08-31 03:34:38,118 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 366 transitions. [2023-08-31 03:34:38,118 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-31 03:34:38,118 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 366 transitions. [2023-08-31 03:34:38,119 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 73.2) internal successors, (366), 5 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) [2023-08-31 03:34:38,121 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 137.0) internal successors, (822), 6 states have internal predecessors, (822), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 03:34:38,121 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 137.0) internal successors, (822), 6 states have internal predecessors, (822), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 03:34:38,121 INFO L175 Difference]: Start difference. First operand has 70 places, 68 transitions, 683 flow. Second operand 5 states and 366 transitions. [2023-08-31 03:34:38,121 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 74 places, 117 transitions, 1313 flow [2023-08-31 03:34:38,137 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 71 places, 117 transitions, 1160 flow, removed 72 selfloop flow, removed 3 redundant places. [2023-08-31 03:34:38,139 INFO L231 Difference]: Finished difference. Result has 74 places, 86 transitions, 908 flow [2023-08-31 03:34:38,139 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=137, PETRI_DIFFERENCE_MINUEND_FLOW=575, PETRI_DIFFERENCE_MINUEND_PLACES=67, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=68, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=14, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=36, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=908, PETRI_PLACES=74, PETRI_TRANSITIONS=86} [2023-08-31 03:34:38,140 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 54 predicate places. [2023-08-31 03:34:38,140 INFO L495 AbstractCegarLoop]: Abstraction has has 74 places, 86 transitions, 908 flow [2023-08-31 03:34:38,141 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 67.0) internal successors, (603), 9 states have internal predecessors, (603), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 03:34:38,141 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 03:34:38,141 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-31 03:34:38,149 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2023-08-31 03:34:38,347 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-31 03:34:38,347 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-31 03:34:38,347 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 03:34:38,347 INFO L85 PathProgramCache]: Analyzing trace with hash -2130618993, now seen corresponding path program 6 times [2023-08-31 03:34:38,348 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-31 03:34:38,348 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1055599988] [2023-08-31 03:34:38,348 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 03:34:38,348 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-31 03:34:38,360 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-31 03:34:38,435 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-31 03:34:38,435 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-31 03:34:38,436 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1055599988] [2023-08-31 03:34:38,436 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1055599988] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-31 03:34:38,436 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [900200551] [2023-08-31 03:34:38,436 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-08-31 03:34:38,436 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-31 03:34:38,437 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-31 03:34:38,438 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-31 03:34:38,460 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2023-08-31 03:34:38,507 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2023-08-31 03:34:38,507 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-31 03:34:38,508 INFO L263 TraceCheckSpWp]: Trace formula consists of 122 conjuncts, 8 conjunts are in the unsatisfiable core [2023-08-31 03:34:38,509 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-31 03:34:38,588 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-31 03:34:38,588 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-31 03:34:38,703 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-31 03:34:38,703 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [900200551] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-31 03:34:38,703 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-31 03:34:38,704 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 16 [2023-08-31 03:34:38,705 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [400202528] [2023-08-31 03:34:38,705 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-31 03:34:38,706 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2023-08-31 03:34:38,707 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-31 03:34:38,707 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2023-08-31 03:34:38,707 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=174, Unknown=0, NotChecked=0, Total=240 [2023-08-31 03:34:38,760 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 55 out of 137 [2023-08-31 03:34:38,761 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 74 places, 86 transitions, 908 flow. Second operand has 16 states, 16 states have (on average 57.1875) internal successors, (915), 16 states have internal predecessors, (915), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 03:34:38,761 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-31 03:34:38,762 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 55 of 137 [2023-08-31 03:34:38,762 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-31 03:34:39,398 INFO L130 PetriNetUnfolder]: 687/1287 cut-off events. [2023-08-31 03:34:39,398 INFO L131 PetriNetUnfolder]: For 13096/13096 co-relation queries the response was YES. [2023-08-31 03:34:39,403 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7926 conditions, 1287 events. 687/1287 cut-off events. For 13096/13096 co-relation queries the response was YES. Maximal size of possible extension queue 106. Compared 7134 event pairs, 10 based on Foata normal form. 24/1311 useless extension candidates. Maximal degree in co-relation 5227. Up to 385 conditions per place. [2023-08-31 03:34:39,410 INFO L137 encePairwiseOnDemand]: 129/137 looper letters, 106 selfloop transitions, 137 changer transitions 16/259 dead transitions. [2023-08-31 03:34:39,411 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 98 places, 259 transitions, 3265 flow [2023-08-31 03:34:39,411 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2023-08-31 03:34:39,411 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 25 states. [2023-08-31 03:34:39,414 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 1500 transitions. [2023-08-31 03:34:39,415 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43795620437956206 [2023-08-31 03:34:39,415 INFO L72 ComplementDD]: Start complementDD. Operand 25 states and 1500 transitions. [2023-08-31 03:34:39,415 INFO L73 IsDeterministic]: Start isDeterministic. Operand 25 states and 1500 transitions. [2023-08-31 03:34:39,416 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-31 03:34:39,416 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 25 states and 1500 transitions. [2023-08-31 03:34:39,420 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 26 states, 25 states have (on average 60.0) internal successors, (1500), 25 states have internal predecessors, (1500), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 03:34:39,425 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 26 states, 26 states have (on average 137.0) internal successors, (3562), 26 states have internal predecessors, (3562), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 03:34:39,426 INFO L81 ComplementDD]: Finished complementDD. Result has 26 states, 26 states have (on average 137.0) internal successors, (3562), 26 states have internal predecessors, (3562), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 03:34:39,426 INFO L175 Difference]: Start difference. First operand has 74 places, 86 transitions, 908 flow. Second operand 25 states and 1500 transitions. [2023-08-31 03:34:39,426 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 98 places, 259 transitions, 3265 flow [2023-08-31 03:34:39,474 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 97 places, 259 transitions, 3233 flow, removed 12 selfloop flow, removed 1 redundant places. [2023-08-31 03:34:39,481 INFO L231 Difference]: Finished difference. Result has 108 places, 171 transitions, 2489 flow [2023-08-31 03:34:39,481 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=137, PETRI_DIFFERENCE_MINUEND_FLOW=896, PETRI_DIFFERENCE_MINUEND_PLACES=73, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=86, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=61, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=21, PETRI_DIFFERENCE_SUBTRAHEND_STATES=25, PETRI_FLOW=2489, PETRI_PLACES=108, PETRI_TRANSITIONS=171} [2023-08-31 03:34:39,482 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 88 predicate places. [2023-08-31 03:34:39,482 INFO L495 AbstractCegarLoop]: Abstraction has has 108 places, 171 transitions, 2489 flow [2023-08-31 03:34:39,482 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 57.1875) internal successors, (915), 16 states have internal predecessors, (915), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 03:34:39,482 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 03:34:39,483 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-31 03:34:39,494 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2023-08-31 03:34:39,689 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-31 03:34:39,690 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-31 03:34:39,690 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 03:34:39,690 INFO L85 PathProgramCache]: Analyzing trace with hash 1283699093, now seen corresponding path program 7 times [2023-08-31 03:34:39,691 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-31 03:34:39,691 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1574018348] [2023-08-31 03:34:39,691 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 03:34:39,691 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-31 03:34:39,704 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-31 03:34:39,819 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-31 03:34:39,819 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-31 03:34:39,820 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1574018348] [2023-08-31 03:34:39,820 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1574018348] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-31 03:34:39,820 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2019816644] [2023-08-31 03:34:39,820 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-08-31 03:34:39,820 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-31 03:34:39,821 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-31 03:34:39,822 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-31 03:34:39,841 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2023-08-31 03:34:39,887 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-31 03:34:39,888 INFO L263 TraceCheckSpWp]: Trace formula consists of 122 conjuncts, 8 conjunts are in the unsatisfiable core [2023-08-31 03:34:39,889 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-31 03:34:39,963 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-31 03:34:39,964 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-31 03:34:40,070 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-31 03:34:40,071 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2019816644] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-31 03:34:40,071 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-31 03:34:40,071 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 16 [2023-08-31 03:34:40,071 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [674096049] [2023-08-31 03:34:40,072 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-31 03:34:40,072 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2023-08-31 03:34:40,073 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-31 03:34:40,074 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2023-08-31 03:34:40,074 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=176, Unknown=0, NotChecked=0, Total=240 [2023-08-31 03:34:40,144 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 55 out of 137 [2023-08-31 03:34:40,145 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 108 places, 171 transitions, 2489 flow. Second operand has 16 states, 16 states have (on average 57.4375) internal successors, (919), 16 states have internal predecessors, (919), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 03:34:40,145 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-31 03:34:40,145 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 55 of 137 [2023-08-31 03:34:40,145 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-31 03:34:40,804 INFO L130 PetriNetUnfolder]: 599/1177 cut-off events. [2023-08-31 03:34:40,805 INFO L131 PetriNetUnfolder]: For 25200/25200 co-relation queries the response was YES. [2023-08-31 03:34:40,810 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8641 conditions, 1177 events. 599/1177 cut-off events. For 25200/25200 co-relation queries the response was YES. Maximal size of possible extension queue 103. Compared 6786 event pairs, 37 based on Foata normal form. 56/1233 useless extension candidates. Maximal degree in co-relation 8462. Up to 334 conditions per place. [2023-08-31 03:34:40,818 INFO L137 encePairwiseOnDemand]: 129/137 looper letters, 101 selfloop transitions, 130 changer transitions 10/241 dead transitions. [2023-08-31 03:34:40,818 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 127 places, 241 transitions, 3509 flow [2023-08-31 03:34:40,818 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2023-08-31 03:34:40,819 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2023-08-31 03:34:40,822 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 1328 transitions. [2023-08-31 03:34:40,823 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44061048440610484 [2023-08-31 03:34:40,823 INFO L72 ComplementDD]: Start complementDD. Operand 22 states and 1328 transitions. [2023-08-31 03:34:40,823 INFO L73 IsDeterministic]: Start isDeterministic. Operand 22 states and 1328 transitions. [2023-08-31 03:34:40,825 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-31 03:34:40,825 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 22 states and 1328 transitions. [2023-08-31 03:34:40,829 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 23 states, 22 states have (on average 60.36363636363637) internal successors, (1328), 22 states have internal predecessors, (1328), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 03:34:40,833 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 23 states, 23 states have (on average 137.0) internal successors, (3151), 23 states have internal predecessors, (3151), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 03:34:40,834 INFO L81 ComplementDD]: Finished complementDD. Result has 23 states, 23 states have (on average 137.0) internal successors, (3151), 23 states have internal predecessors, (3151), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 03:34:40,834 INFO L175 Difference]: Start difference. First operand has 108 places, 171 transitions, 2489 flow. Second operand 22 states and 1328 transitions. [2023-08-31 03:34:40,834 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 127 places, 241 transitions, 3509 flow [2023-08-31 03:34:40,899 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 122 places, 241 transitions, 3109 flow, removed 194 selfloop flow, removed 5 redundant places. [2023-08-31 03:34:40,905 INFO L231 Difference]: Finished difference. Result has 126 places, 168 transitions, 2457 flow [2023-08-31 03:34:40,906 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=137, PETRI_DIFFERENCE_MINUEND_FLOW=2050, PETRI_DIFFERENCE_MINUEND_PLACES=101, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=165, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=122, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=39, PETRI_DIFFERENCE_SUBTRAHEND_STATES=22, PETRI_FLOW=2457, PETRI_PLACES=126, PETRI_TRANSITIONS=168} [2023-08-31 03:34:40,906 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 106 predicate places. [2023-08-31 03:34:40,906 INFO L495 AbstractCegarLoop]: Abstraction has has 126 places, 168 transitions, 2457 flow [2023-08-31 03:34:40,907 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 57.4375) internal successors, (919), 16 states have internal predecessors, (919), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 03:34:40,907 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 03:34:40,907 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-31 03:34:40,914 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2023-08-31 03:34:41,113 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2023-08-31 03:34:41,114 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-31 03:34:41,115 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 03:34:41,115 INFO L85 PathProgramCache]: Analyzing trace with hash 465738203, now seen corresponding path program 8 times [2023-08-31 03:34:41,115 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-31 03:34:41,116 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1873791520] [2023-08-31 03:34:41,116 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 03:34:41,116 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-31 03:34:41,125 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-31 03:34:41,231 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-31 03:34:41,232 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-31 03:34:41,232 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1873791520] [2023-08-31 03:34:41,232 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1873791520] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-31 03:34:41,232 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1687316753] [2023-08-31 03:34:41,232 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-08-31 03:34:41,232 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-31 03:34:41,233 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-31 03:34:41,234 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-31 03:34:41,249 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2023-08-31 03:34:41,300 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-08-31 03:34:41,301 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-31 03:34:41,302 INFO L263 TraceCheckSpWp]: Trace formula consists of 122 conjuncts, 9 conjunts are in the unsatisfiable core [2023-08-31 03:34:41,303 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-31 03:34:41,405 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-31 03:34:41,405 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-31 03:34:41,534 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-31 03:34:41,535 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1687316753] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-31 03:34:41,535 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-31 03:34:41,535 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 18 [2023-08-31 03:34:41,536 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1641028703] [2023-08-31 03:34:41,536 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-31 03:34:41,537 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2023-08-31 03:34:41,537 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-31 03:34:41,538 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2023-08-31 03:34:41,538 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=226, Unknown=0, NotChecked=0, Total=306 [2023-08-31 03:34:41,625 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 55 out of 137 [2023-08-31 03:34:41,626 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 126 places, 168 transitions, 2457 flow. Second operand has 18 states, 18 states have (on average 57.388888888888886) internal successors, (1033), 18 states have internal predecessors, (1033), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 03:34:41,626 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-31 03:34:41,627 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 55 of 137 [2023-08-31 03:34:41,627 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-31 03:34:42,257 INFO L130 PetriNetUnfolder]: 764/1554 cut-off events. [2023-08-31 03:34:42,257 INFO L131 PetriNetUnfolder]: For 41948/41948 co-relation queries the response was YES. [2023-08-31 03:34:42,265 INFO L83 FinitePrefix]: Finished finitePrefix Result has 11238 conditions, 1554 events. 764/1554 cut-off events. For 41948/41948 co-relation queries the response was YES. Maximal size of possible extension queue 132. Compared 9726 event pairs, 119 based on Foata normal form. 96/1650 useless extension candidates. Maximal degree in co-relation 9527. Up to 969 conditions per place. [2023-08-31 03:34:42,275 INFO L137 encePairwiseOnDemand]: 130/137 looper letters, 189 selfloop transitions, 87 changer transitions 8/284 dead transitions. [2023-08-31 03:34:42,275 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 144 places, 284 transitions, 4327 flow [2023-08-31 03:34:42,275 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2023-08-31 03:34:42,275 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2023-08-31 03:34:42,280 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 1215 transitions. [2023-08-31 03:34:42,281 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44343065693430656 [2023-08-31 03:34:42,281 INFO L72 ComplementDD]: Start complementDD. Operand 20 states and 1215 transitions. [2023-08-31 03:34:42,281 INFO L73 IsDeterministic]: Start isDeterministic. Operand 20 states and 1215 transitions. [2023-08-31 03:34:42,281 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-31 03:34:42,282 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 20 states and 1215 transitions. [2023-08-31 03:34:42,284 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 21 states, 20 states have (on average 60.75) internal successors, (1215), 20 states have internal predecessors, (1215), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 03:34:42,288 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 21 states, 21 states have (on average 137.0) internal successors, (2877), 21 states have internal predecessors, (2877), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 03:34:42,289 INFO L81 ComplementDD]: Finished complementDD. Result has 21 states, 21 states have (on average 137.0) internal successors, (2877), 21 states have internal predecessors, (2877), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 03:34:42,289 INFO L175 Difference]: Start difference. First operand has 126 places, 168 transitions, 2457 flow. Second operand 20 states and 1215 transitions. [2023-08-31 03:34:42,289 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 144 places, 284 transitions, 4327 flow [2023-08-31 03:34:42,386 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 133 places, 284 transitions, 4218 flow, removed 13 selfloop flow, removed 11 redundant places. [2023-08-31 03:34:42,393 INFO L231 Difference]: Finished difference. Result has 140 places, 210 transitions, 3396 flow [2023-08-31 03:34:42,393 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=137, PETRI_DIFFERENCE_MINUEND_FLOW=2352, PETRI_DIFFERENCE_MINUEND_PLACES=114, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=168, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=53, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=105, PETRI_DIFFERENCE_SUBTRAHEND_STATES=20, PETRI_FLOW=3396, PETRI_PLACES=140, PETRI_TRANSITIONS=210} [2023-08-31 03:34:42,394 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 120 predicate places. [2023-08-31 03:34:42,394 INFO L495 AbstractCegarLoop]: Abstraction has has 140 places, 210 transitions, 3396 flow [2023-08-31 03:34:42,395 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 57.388888888888886) internal successors, (1033), 18 states have internal predecessors, (1033), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 03:34:42,395 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 03:34:42,395 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-31 03:34:42,403 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2023-08-31 03:34:42,600 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-31 03:34:42,601 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-31 03:34:42,601 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 03:34:42,601 INFO L85 PathProgramCache]: Analyzing trace with hash -2109457573, now seen corresponding path program 9 times [2023-08-31 03:34:42,601 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-31 03:34:42,601 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [722808797] [2023-08-31 03:34:42,601 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 03:34:42,601 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-31 03:34:42,609 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-31 03:34:42,684 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-31 03:34:42,685 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-31 03:34:42,685 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [722808797] [2023-08-31 03:34:42,685 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [722808797] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-31 03:34:42,685 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [207577343] [2023-08-31 03:34:42,685 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-08-31 03:34:42,685 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-31 03:34:42,685 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-31 03:34:42,686 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-31 03:34:42,688 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2023-08-31 03:34:42,747 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2023-08-31 03:34:42,747 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-31 03:34:42,748 INFO L263 TraceCheckSpWp]: Trace formula consists of 122 conjuncts, 8 conjunts are in the unsatisfiable core [2023-08-31 03:34:42,751 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-31 03:34:42,833 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-31 03:34:42,833 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-31 03:34:42,910 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-31 03:34:42,911 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [207577343] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-31 03:34:42,911 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-31 03:34:42,911 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 6] total 16 [2023-08-31 03:34:42,911 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1724645806] [2023-08-31 03:34:42,911 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-31 03:34:42,912 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2023-08-31 03:34:42,913 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-31 03:34:42,914 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2023-08-31 03:34:42,914 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=174, Unknown=0, NotChecked=0, Total=240 [2023-08-31 03:34:42,971 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 55 out of 137 [2023-08-31 03:34:42,973 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 140 places, 210 transitions, 3396 flow. Second operand has 16 states, 16 states have (on average 57.25) internal successors, (916), 16 states have internal predecessors, (916), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 03:34:42,973 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-31 03:34:42,973 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 55 of 137 [2023-08-31 03:34:42,973 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-31 03:34:43,559 INFO L130 PetriNetUnfolder]: 756/1536 cut-off events. [2023-08-31 03:34:43,559 INFO L131 PetriNetUnfolder]: For 43638/43638 co-relation queries the response was YES. [2023-08-31 03:34:43,569 INFO L83 FinitePrefix]: Finished finitePrefix Result has 12568 conditions, 1536 events. 756/1536 cut-off events. For 43638/43638 co-relation queries the response was YES. Maximal size of possible extension queue 136. Compared 9681 event pairs, 25 based on Foata normal form. 8/1544 useless extension candidates. Maximal degree in co-relation 10773. Up to 468 conditions per place. [2023-08-31 03:34:43,582 INFO L137 encePairwiseOnDemand]: 130/137 looper letters, 153 selfloop transitions, 120 changer transitions 9/282 dead transitions. [2023-08-31 03:34:43,582 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 159 places, 282 transitions, 4856 flow [2023-08-31 03:34:43,582 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2023-08-31 03:34:43,582 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2023-08-31 03:34:43,584 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 1195 transitions. [2023-08-31 03:34:43,585 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43613138686131386 [2023-08-31 03:34:43,585 INFO L72 ComplementDD]: Start complementDD. Operand 20 states and 1195 transitions. [2023-08-31 03:34:43,585 INFO L73 IsDeterministic]: Start isDeterministic. Operand 20 states and 1195 transitions. [2023-08-31 03:34:43,588 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-31 03:34:43,588 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 20 states and 1195 transitions. [2023-08-31 03:34:43,593 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 21 states, 20 states have (on average 59.75) internal successors, (1195), 20 states have internal predecessors, (1195), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 03:34:43,597 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 21 states, 21 states have (on average 137.0) internal successors, (2877), 21 states have internal predecessors, (2877), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 03:34:43,598 INFO L81 ComplementDD]: Finished complementDD. Result has 21 states, 21 states have (on average 137.0) internal successors, (2877), 21 states have internal predecessors, (2877), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 03:34:43,598 INFO L175 Difference]: Start difference. First operand has 140 places, 210 transitions, 3396 flow. Second operand 20 states and 1195 transitions. [2023-08-31 03:34:43,598 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 159 places, 282 transitions, 4856 flow [2023-08-31 03:34:43,738 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 149 places, 282 transitions, 4488 flow, removed 152 selfloop flow, removed 10 redundant places. [2023-08-31 03:34:43,743 INFO L231 Difference]: Finished difference. Result has 153 places, 224 transitions, 3656 flow [2023-08-31 03:34:43,744 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=137, PETRI_DIFFERENCE_MINUEND_FLOW=3070, PETRI_DIFFERENCE_MINUEND_PLACES=130, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=210, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=108, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=99, PETRI_DIFFERENCE_SUBTRAHEND_STATES=20, PETRI_FLOW=3656, PETRI_PLACES=153, PETRI_TRANSITIONS=224} [2023-08-31 03:34:43,745 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 133 predicate places. [2023-08-31 03:34:43,745 INFO L495 AbstractCegarLoop]: Abstraction has has 153 places, 224 transitions, 3656 flow [2023-08-31 03:34:43,746 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 57.25) internal successors, (916), 16 states have internal predecessors, (916), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 03:34:43,746 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 03:34:43,746 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-31 03:34:43,755 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2023-08-31 03:34:43,951 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2023-08-31 03:34:43,952 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-31 03:34:43,952 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 03:34:43,952 INFO L85 PathProgramCache]: Analyzing trace with hash 1117413703, now seen corresponding path program 10 times [2023-08-31 03:34:43,952 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-31 03:34:43,952 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [240550727] [2023-08-31 03:34:43,952 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 03:34:43,952 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-31 03:34:43,978 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-31 03:34:44,132 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-31 03:34:44,133 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-31 03:34:44,133 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [240550727] [2023-08-31 03:34:44,133 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [240550727] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-31 03:34:44,133 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1557857760] [2023-08-31 03:34:44,133 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-08-31 03:34:44,134 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-31 03:34:44,134 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-31 03:34:44,137 INFO L229 MonitoredProcess]: Starting monitored process 12 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-31 03:34:44,160 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2023-08-31 03:34:44,201 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-08-31 03:34:44,202 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-31 03:34:44,203 INFO L263 TraceCheckSpWp]: Trace formula consists of 124 conjuncts, 10 conjunts are in the unsatisfiable core [2023-08-31 03:34:44,204 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-31 03:34:44,236 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-31 03:34:44,236 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-31 03:34:44,299 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-31 03:34:44,300 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1557857760] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-31 03:34:44,300 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-31 03:34:44,300 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 4, 4] total 13 [2023-08-31 03:34:44,301 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1923144310] [2023-08-31 03:34:44,303 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-31 03:34:44,304 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2023-08-31 03:34:44,304 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-31 03:34:44,305 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2023-08-31 03:34:44,305 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=137, Unknown=0, NotChecked=0, Total=182 [2023-08-31 03:34:44,385 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 55 out of 137 [2023-08-31 03:34:44,386 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 153 places, 224 transitions, 3656 flow. Second operand has 14 states, 14 states have (on average 57.642857142857146) internal successors, (807), 14 states have internal predecessors, (807), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 03:34:44,386 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-31 03:34:44,386 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 55 of 137 [2023-08-31 03:34:44,386 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-31 03:34:45,112 INFO L130 PetriNetUnfolder]: 803/1611 cut-off events. [2023-08-31 03:34:45,112 INFO L131 PetriNetUnfolder]: For 63986/63986 co-relation queries the response was YES. [2023-08-31 03:34:45,122 INFO L83 FinitePrefix]: Finished finitePrefix Result has 13527 conditions, 1611 events. 803/1611 cut-off events. For 63986/63986 co-relation queries the response was YES. Maximal size of possible extension queue 140. Compared 10101 event pairs, 33 based on Foata normal form. 46/1657 useless extension candidates. Maximal degree in co-relation 11549. Up to 407 conditions per place. [2023-08-31 03:34:45,139 INFO L137 encePairwiseOnDemand]: 130/137 looper letters, 167 selfloop transitions, 136 changer transitions 52/355 dead transitions. [2023-08-31 03:34:45,140 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 181 places, 355 transitions, 5940 flow [2023-08-31 03:34:45,140 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2023-08-31 03:34:45,140 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2023-08-31 03:34:45,142 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 1800 transitions. [2023-08-31 03:34:45,143 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43795620437956206 [2023-08-31 03:34:45,143 INFO L72 ComplementDD]: Start complementDD. Operand 30 states and 1800 transitions. [2023-08-31 03:34:45,143 INFO L73 IsDeterministic]: Start isDeterministic. Operand 30 states and 1800 transitions. [2023-08-31 03:34:45,144 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-31 03:34:45,144 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 30 states and 1800 transitions. [2023-08-31 03:34:45,147 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 31 states, 30 states have (on average 60.0) internal successors, (1800), 30 states have internal predecessors, (1800), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 03:34:45,152 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 31 states, 31 states have (on average 137.0) internal successors, (4247), 31 states have internal predecessors, (4247), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 03:34:45,153 INFO L81 ComplementDD]: Finished complementDD. Result has 31 states, 31 states have (on average 137.0) internal successors, (4247), 31 states have internal predecessors, (4247), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 03:34:45,153 INFO L175 Difference]: Start difference. First operand has 153 places, 224 transitions, 3656 flow. Second operand 30 states and 1800 transitions. [2023-08-31 03:34:45,153 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 181 places, 355 transitions, 5940 flow [2023-08-31 03:34:45,366 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 175 places, 355 transitions, 5667 flow, removed 111 selfloop flow, removed 6 redundant places. [2023-08-31 03:34:45,372 INFO L231 Difference]: Finished difference. Result has 185 places, 250 transitions, 4313 flow [2023-08-31 03:34:45,373 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=137, PETRI_DIFFERENCE_MINUEND_FLOW=3475, PETRI_DIFFERENCE_MINUEND_PLACES=146, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=224, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=112, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=109, PETRI_DIFFERENCE_SUBTRAHEND_STATES=30, PETRI_FLOW=4313, PETRI_PLACES=185, PETRI_TRANSITIONS=250} [2023-08-31 03:34:45,374 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 165 predicate places. [2023-08-31 03:34:45,374 INFO L495 AbstractCegarLoop]: Abstraction has has 185 places, 250 transitions, 4313 flow [2023-08-31 03:34:45,375 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 57.642857142857146) internal successors, (807), 14 states have internal predecessors, (807), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 03:34:45,375 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 03:34:45,375 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-31 03:34:45,382 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2023-08-31 03:34:45,577 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2023-08-31 03:34:45,577 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-31 03:34:45,577 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 03:34:45,577 INFO L85 PathProgramCache]: Analyzing trace with hash 715119095, now seen corresponding path program 11 times [2023-08-31 03:34:45,578 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-31 03:34:45,578 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1068977941] [2023-08-31 03:34:45,578 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 03:34:45,578 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-31 03:34:45,598 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-31 03:34:45,763 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 5 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-31 03:34:45,764 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-31 03:34:45,764 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1068977941] [2023-08-31 03:34:45,764 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1068977941] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-31 03:34:45,764 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1833652617] [2023-08-31 03:34:45,764 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-08-31 03:34:45,765 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-31 03:34:45,765 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-31 03:34:45,766 INFO L229 MonitoredProcess]: Starting monitored process 13 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-31 03:34:45,785 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2023-08-31 03:34:45,829 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2023-08-31 03:34:45,830 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-31 03:34:45,831 INFO L263 TraceCheckSpWp]: Trace formula consists of 134 conjuncts, 13 conjunts are in the unsatisfiable core [2023-08-31 03:34:45,832 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-31 03:34:45,929 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 7 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-31 03:34:45,929 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-31 03:34:46,177 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 7 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-31 03:34:46,178 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1833652617] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-31 03:34:46,178 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-31 03:34:46,178 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 25 [2023-08-31 03:34:46,178 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1436975841] [2023-08-31 03:34:46,178 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-31 03:34:46,179 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2023-08-31 03:34:46,179 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-31 03:34:46,179 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2023-08-31 03:34:46,180 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=153, Invalid=447, Unknown=0, NotChecked=0, Total=600 [2023-08-31 03:34:46,277 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 55 out of 137 [2023-08-31 03:34:46,278 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 185 places, 250 transitions, 4313 flow. Second operand has 25 states, 25 states have (on average 56.8) internal successors, (1420), 25 states have internal predecessors, (1420), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 03:34:46,278 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-31 03:34:46,278 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 55 of 137 [2023-08-31 03:34:46,278 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-31 03:34:48,070 INFO L130 PetriNetUnfolder]: 1235/2432 cut-off events. [2023-08-31 03:34:48,070 INFO L131 PetriNetUnfolder]: For 178071/178071 co-relation queries the response was YES. [2023-08-31 03:34:48,089 INFO L83 FinitePrefix]: Finished finitePrefix Result has 25740 conditions, 2432 events. 1235/2432 cut-off events. For 178071/178071 co-relation queries the response was YES. Maximal size of possible extension queue 200. Compared 16197 event pairs, 10 based on Foata normal form. 38/2470 useless extension candidates. Maximal degree in co-relation 24794. Up to 639 conditions per place. [2023-08-31 03:34:48,105 INFO L137 encePairwiseOnDemand]: 129/137 looper letters, 208 selfloop transitions, 385 changer transitions 17/610 dead transitions. [2023-08-31 03:34:48,105 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 228 places, 610 transitions, 11431 flow [2023-08-31 03:34:48,106 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2023-08-31 03:34:48,106 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 51 states. [2023-08-31 03:34:48,109 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 3087 transitions. [2023-08-31 03:34:48,110 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44182052382996995 [2023-08-31 03:34:48,110 INFO L72 ComplementDD]: Start complementDD. Operand 51 states and 3087 transitions. [2023-08-31 03:34:48,110 INFO L73 IsDeterministic]: Start isDeterministic. Operand 51 states and 3087 transitions. [2023-08-31 03:34:48,112 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-31 03:34:48,112 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 51 states and 3087 transitions. [2023-08-31 03:34:48,117 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 52 states, 51 states have (on average 60.529411764705884) internal successors, (3087), 51 states have internal predecessors, (3087), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 03:34:48,124 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 52 states, 52 states have (on average 137.0) internal successors, (7124), 52 states have internal predecessors, (7124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 03:34:48,126 INFO L81 ComplementDD]: Finished complementDD. Result has 52 states, 52 states have (on average 137.0) internal successors, (7124), 52 states have internal predecessors, (7124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 03:34:48,126 INFO L175 Difference]: Start difference. First operand has 185 places, 250 transitions, 4313 flow. Second operand 51 states and 3087 transitions. [2023-08-31 03:34:48,126 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 228 places, 610 transitions, 11431 flow [2023-08-31 03:34:48,493 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 218 places, 610 transitions, 10906 flow, removed 194 selfloop flow, removed 10 redundant places. [2023-08-31 03:34:48,504 INFO L231 Difference]: Finished difference. Result has 226 places, 442 transitions, 9865 flow [2023-08-31 03:34:48,504 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=137, PETRI_DIFFERENCE_MINUEND_FLOW=4078, PETRI_DIFFERENCE_MINUEND_PLACES=168, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=250, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=222, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=24, PETRI_DIFFERENCE_SUBTRAHEND_STATES=51, PETRI_FLOW=9865, PETRI_PLACES=226, PETRI_TRANSITIONS=442} [2023-08-31 03:34:48,505 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 206 predicate places. [2023-08-31 03:34:48,505 INFO L495 AbstractCegarLoop]: Abstraction has has 226 places, 442 transitions, 9865 flow [2023-08-31 03:34:48,506 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 56.8) internal successors, (1420), 25 states have internal predecessors, (1420), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 03:34:48,506 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 03:34:48,506 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-31 03:34:48,511 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Ended with exit code 0 [2023-08-31 03:34:48,711 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2023-08-31 03:34:48,711 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-31 03:34:48,711 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 03:34:48,712 INFO L85 PathProgramCache]: Analyzing trace with hash 1058407358, now seen corresponding path program 12 times [2023-08-31 03:34:48,712 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-31 03:34:48,712 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [199156812] [2023-08-31 03:34:48,712 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 03:34:48,712 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-31 03:34:48,739 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-31 03:34:48,874 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-31 03:34:48,875 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-31 03:34:48,875 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [199156812] [2023-08-31 03:34:48,875 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [199156812] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-31 03:34:48,875 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [910371266] [2023-08-31 03:34:48,875 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-08-31 03:34:48,876 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-31 03:34:48,876 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-31 03:34:48,877 INFO L229 MonitoredProcess]: Starting monitored process 14 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-31 03:34:48,880 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2023-08-31 03:34:48,943 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2023-08-31 03:34:48,944 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-31 03:34:48,945 INFO L263 TraceCheckSpWp]: Trace formula consists of 131 conjuncts, 16 conjunts are in the unsatisfiable core [2023-08-31 03:34:48,946 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-31 03:34:48,986 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-31 03:34:48,987 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-31 03:34:49,239 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 6 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-31 03:34:49,240 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [910371266] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-31 03:34:49,240 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-31 03:34:49,240 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 7] total 10 [2023-08-31 03:34:49,240 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [474743847] [2023-08-31 03:34:49,240 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-31 03:34:49,241 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-08-31 03:34:49,241 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-31 03:34:49,241 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-08-31 03:34:49,241 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=90, Unknown=0, NotChecked=0, Total=132 [2023-08-31 03:34:49,255 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 64 out of 137 [2023-08-31 03:34:49,256 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 226 places, 442 transitions, 9865 flow. Second operand has 12 states, 12 states have (on average 66.58333333333333) internal successors, (799), 12 states have internal predecessors, (799), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 03:34:49,257 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-31 03:34:49,257 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 64 of 137 [2023-08-31 03:34:49,257 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-31 03:34:50,411 INFO L130 PetriNetUnfolder]: 1938/3770 cut-off events. [2023-08-31 03:34:50,411 INFO L131 PetriNetUnfolder]: For 282085/282089 co-relation queries the response was YES. [2023-08-31 03:34:50,437 INFO L83 FinitePrefix]: Finished finitePrefix Result has 42742 conditions, 3770 events. 1938/3770 cut-off events. For 282085/282089 co-relation queries the response was YES. Maximal size of possible extension queue 307. Compared 27206 event pairs, 168 based on Foata normal form. 7/3770 useless extension candidates. Maximal degree in co-relation 41840. Up to 1612 conditions per place. [2023-08-31 03:34:50,515 INFO L137 encePairwiseOnDemand]: 133/137 looper letters, 442 selfloop transitions, 257 changer transitions 28/736 dead transitions. [2023-08-31 03:34:50,516 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 230 places, 736 transitions, 17988 flow [2023-08-31 03:34:50,516 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-08-31 03:34:50,516 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-08-31 03:34:50,517 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 441 transitions. [2023-08-31 03:34:50,518 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5364963503649635 [2023-08-31 03:34:50,518 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 441 transitions. [2023-08-31 03:34:50,518 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 441 transitions. [2023-08-31 03:34:50,518 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-31 03:34:50,519 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 441 transitions. [2023-08-31 03:34:50,519 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 73.5) internal successors, (441), 6 states have internal predecessors, (441), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 03:34:50,521 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 137.0) internal successors, (959), 7 states have internal predecessors, (959), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 03:34:50,521 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 137.0) internal successors, (959), 7 states have internal predecessors, (959), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 03:34:50,521 INFO L175 Difference]: Start difference. First operand has 226 places, 442 transitions, 9865 flow. Second operand 6 states and 441 transitions. [2023-08-31 03:34:50,521 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 230 places, 736 transitions, 17988 flow [2023-08-31 03:34:52,546 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 227 places, 736 transitions, 12584 flow, removed 2614 selfloop flow, removed 3 redundant places. [2023-08-31 03:34:52,555 INFO L231 Difference]: Finished difference. Result has 231 places, 588 transitions, 10758 flow [2023-08-31 03:34:52,555 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=137, PETRI_DIFFERENCE_MINUEND_FLOW=7002, PETRI_DIFFERENCE_MINUEND_PLACES=222, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=442, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=111, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=185, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=10758, PETRI_PLACES=231, PETRI_TRANSITIONS=588} [2023-08-31 03:34:52,556 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 211 predicate places. [2023-08-31 03:34:52,556 INFO L495 AbstractCegarLoop]: Abstraction has has 231 places, 588 transitions, 10758 flow [2023-08-31 03:34:52,556 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 66.58333333333333) internal successors, (799), 12 states have internal predecessors, (799), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 03:34:52,556 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 03:34:52,556 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-31 03:34:52,563 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2023-08-31 03:34:52,756 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2023-08-31 03:34:52,757 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-31 03:34:52,757 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 03:34:52,758 INFO L85 PathProgramCache]: Analyzing trace with hash -1587282354, now seen corresponding path program 13 times [2023-08-31 03:34:52,758 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-31 03:34:52,758 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1303588035] [2023-08-31 03:34:52,758 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 03:34:52,758 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-31 03:34:52,767 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-31 03:34:52,893 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-31 03:34:52,894 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-31 03:34:52,894 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1303588035] [2023-08-31 03:34:52,894 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1303588035] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-31 03:34:52,894 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1521327743] [2023-08-31 03:34:52,894 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-08-31 03:34:52,894 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-31 03:34:52,895 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-31 03:34:52,896 INFO L229 MonitoredProcess]: Starting monitored process 15 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-31 03:34:52,916 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2023-08-31 03:34:52,955 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-31 03:34:52,956 INFO L263 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 12 conjunts are in the unsatisfiable core [2023-08-31 03:34:52,957 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-31 03:34:53,052 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-31 03:34:53,052 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-31 03:34:53,288 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-31 03:34:53,288 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1521327743] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-31 03:34:53,289 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-31 03:34:53,289 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 21 [2023-08-31 03:34:53,289 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1162196678] [2023-08-31 03:34:53,289 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-31 03:34:53,289 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2023-08-31 03:34:53,290 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-31 03:34:53,290 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2023-08-31 03:34:53,290 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=94, Invalid=326, Unknown=0, NotChecked=0, Total=420 [2023-08-31 03:34:53,440 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 55 out of 137 [2023-08-31 03:34:53,441 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 231 places, 588 transitions, 10758 flow. Second operand has 21 states, 21 states have (on average 57.19047619047619) internal successors, (1201), 21 states have internal predecessors, (1201), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 03:34:53,441 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-31 03:34:53,441 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 55 of 137 [2023-08-31 03:34:53,441 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-31 03:34:54,826 INFO L130 PetriNetUnfolder]: 1896/3701 cut-off events. [2023-08-31 03:34:54,827 INFO L131 PetriNetUnfolder]: For 45867/45867 co-relation queries the response was YES. [2023-08-31 03:34:54,845 INFO L83 FinitePrefix]: Finished finitePrefix Result has 26785 conditions, 3701 events. 1896/3701 cut-off events. For 45867/45867 co-relation queries the response was YES. Maximal size of possible extension queue 300. Compared 26534 event pairs, 40 based on Foata normal form. 68/3769 useless extension candidates. Maximal degree in co-relation 26290. Up to 1102 conditions per place. [2023-08-31 03:34:54,863 INFO L137 encePairwiseOnDemand]: 130/137 looper letters, 217 selfloop transitions, 451 changer transitions 20/688 dead transitions. [2023-08-31 03:34:54,864 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 250 places, 688 transitions, 13128 flow [2023-08-31 03:34:54,864 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2023-08-31 03:34:54,864 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2023-08-31 03:34:54,866 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 1457 transitions. [2023-08-31 03:34:54,867 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4431265206812652 [2023-08-31 03:34:54,867 INFO L72 ComplementDD]: Start complementDD. Operand 24 states and 1457 transitions. [2023-08-31 03:34:54,868 INFO L73 IsDeterministic]: Start isDeterministic. Operand 24 states and 1457 transitions. [2023-08-31 03:34:54,868 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-31 03:34:54,868 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 24 states and 1457 transitions. [2023-08-31 03:34:54,871 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 25 states, 24 states have (on average 60.708333333333336) internal successors, (1457), 24 states have internal predecessors, (1457), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 03:34:54,875 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 25 states, 25 states have (on average 137.0) internal successors, (3425), 25 states have internal predecessors, (3425), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 03:34:54,876 INFO L81 ComplementDD]: Finished complementDD. Result has 25 states, 25 states have (on average 137.0) internal successors, (3425), 25 states have internal predecessors, (3425), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 03:34:54,876 INFO L175 Difference]: Start difference. First operand has 231 places, 588 transitions, 10758 flow. Second operand 24 states and 1457 transitions. [2023-08-31 03:34:54,876 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 250 places, 688 transitions, 13128 flow [2023-08-31 03:34:55,306 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 248 places, 688 transitions, 12939 flow, removed 90 selfloop flow, removed 2 redundant places. [2023-08-31 03:34:55,317 INFO L231 Difference]: Finished difference. Result has 248 places, 592 transitions, 11738 flow [2023-08-31 03:34:55,318 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=137, PETRI_DIFFERENCE_MINUEND_FLOW=10528, PETRI_DIFFERENCE_MINUEND_PLACES=225, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=577, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=433, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=144, PETRI_DIFFERENCE_SUBTRAHEND_STATES=24, PETRI_FLOW=11738, PETRI_PLACES=248, PETRI_TRANSITIONS=592} [2023-08-31 03:34:55,318 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 228 predicate places. [2023-08-31 03:34:55,319 INFO L495 AbstractCegarLoop]: Abstraction has has 248 places, 592 transitions, 11738 flow [2023-08-31 03:34:55,319 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 57.19047619047619) internal successors, (1201), 21 states have internal predecessors, (1201), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 03:34:55,319 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 03:34:55,319 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-31 03:34:55,329 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2023-08-31 03:34:55,524 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15,15 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-31 03:34:55,525 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-31 03:34:55,525 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 03:34:55,526 INFO L85 PathProgramCache]: Analyzing trace with hash 1502044534, now seen corresponding path program 14 times [2023-08-31 03:34:55,526 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-31 03:34:55,526 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1167681894] [2023-08-31 03:34:55,526 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 03:34:55,526 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-31 03:34:55,537 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-31 03:34:55,677 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-31 03:34:55,678 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-31 03:34:55,678 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1167681894] [2023-08-31 03:34:55,678 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1167681894] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-31 03:34:55,678 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2139744991] [2023-08-31 03:34:55,678 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-08-31 03:34:55,678 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-31 03:34:55,679 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-31 03:34:55,679 INFO L229 MonitoredProcess]: Starting monitored process 16 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-31 03:34:55,681 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2023-08-31 03:34:55,738 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-08-31 03:34:55,739 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-31 03:34:55,740 INFO L263 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 12 conjunts are in the unsatisfiable core [2023-08-31 03:34:55,741 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-31 03:34:55,838 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-31 03:34:55,838 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-31 03:34:56,053 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-31 03:34:56,054 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2139744991] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-31 03:34:56,054 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-31 03:34:56,054 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 22 [2023-08-31 03:34:56,054 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [454989779] [2023-08-31 03:34:56,054 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-31 03:34:56,054 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2023-08-31 03:34:56,054 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-31 03:34:56,055 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2023-08-31 03:34:56,055 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=105, Invalid=357, Unknown=0, NotChecked=0, Total=462 [2023-08-31 03:34:56,167 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 55 out of 137 [2023-08-31 03:34:56,168 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 248 places, 592 transitions, 11738 flow. Second operand has 22 states, 22 states have (on average 57.18181818181818) internal successors, (1258), 22 states have internal predecessors, (1258), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 03:34:56,168 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-31 03:34:56,168 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 55 of 137 [2023-08-31 03:34:56,168 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-31 03:34:57,587 INFO L130 PetriNetUnfolder]: 2183/4264 cut-off events. [2023-08-31 03:34:57,587 INFO L131 PetriNetUnfolder]: For 58092/58092 co-relation queries the response was YES. [2023-08-31 03:34:57,608 INFO L83 FinitePrefix]: Finished finitePrefix Result has 31312 conditions, 4264 events. 2183/4264 cut-off events. For 58092/58092 co-relation queries the response was YES. Maximal size of possible extension queue 354. Compared 31626 event pairs, 51 based on Foata normal form. 104/4368 useless extension candidates. Maximal degree in co-relation 30827. Up to 1652 conditions per place. [2023-08-31 03:34:57,629 INFO L137 encePairwiseOnDemand]: 129/137 looper letters, 285 selfloop transitions, 513 changer transitions 4/802 dead transitions. [2023-08-31 03:34:57,629 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 273 places, 802 transitions, 16001 flow [2023-08-31 03:34:57,630 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2023-08-31 03:34:57,630 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2023-08-31 03:34:57,631 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 1575 transitions. [2023-08-31 03:34:57,632 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4421673217293655 [2023-08-31 03:34:57,632 INFO L72 ComplementDD]: Start complementDD. Operand 26 states and 1575 transitions. [2023-08-31 03:34:57,633 INFO L73 IsDeterministic]: Start isDeterministic. Operand 26 states and 1575 transitions. [2023-08-31 03:34:57,633 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-31 03:34:57,633 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 26 states and 1575 transitions. [2023-08-31 03:34:57,635 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 27 states, 26 states have (on average 60.57692307692308) internal successors, (1575), 26 states have internal predecessors, (1575), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 03:34:57,639 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 27 states, 27 states have (on average 137.0) internal successors, (3699), 27 states have internal predecessors, (3699), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 03:34:57,640 INFO L81 ComplementDD]: Finished complementDD. Result has 27 states, 27 states have (on average 137.0) internal successors, (3699), 27 states have internal predecessors, (3699), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 03:34:57,640 INFO L175 Difference]: Start difference. First operand has 248 places, 592 transitions, 11738 flow. Second operand 26 states and 1575 transitions. [2023-08-31 03:34:57,640 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 273 places, 802 transitions, 16001 flow [2023-08-31 03:34:58,124 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 259 places, 802 transitions, 15806 flow, removed 21 selfloop flow, removed 14 redundant places. [2023-08-31 03:34:58,137 INFO L231 Difference]: Finished difference. Result has 270 places, 680 transitions, 14937 flow [2023-08-31 03:34:58,138 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=137, PETRI_DIFFERENCE_MINUEND_FLOW=11572, PETRI_DIFFERENCE_MINUEND_PLACES=234, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=592, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=426, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=148, PETRI_DIFFERENCE_SUBTRAHEND_STATES=26, PETRI_FLOW=14937, PETRI_PLACES=270, PETRI_TRANSITIONS=680} [2023-08-31 03:34:58,138 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 250 predicate places. [2023-08-31 03:34:58,138 INFO L495 AbstractCegarLoop]: Abstraction has has 270 places, 680 transitions, 14937 flow [2023-08-31 03:34:58,139 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 57.18181818181818) internal successors, (1258), 22 states have internal predecessors, (1258), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 03:34:58,139 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 03:34:58,139 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-31 03:34:58,144 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Ended with exit code 0 [2023-08-31 03:34:58,339 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2023-08-31 03:34:58,339 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-31 03:34:58,340 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 03:34:58,340 INFO L85 PathProgramCache]: Analyzing trace with hash 2011961230, now seen corresponding path program 15 times [2023-08-31 03:34:58,340 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-31 03:34:58,340 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [401100328] [2023-08-31 03:34:58,340 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 03:34:58,340 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-31 03:34:58,348 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-31 03:34:58,475 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-31 03:34:58,476 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-31 03:34:58,476 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [401100328] [2023-08-31 03:34:58,476 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [401100328] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-31 03:34:58,476 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1331670885] [2023-08-31 03:34:58,477 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-08-31 03:34:58,477 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-31 03:34:58,477 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-31 03:34:58,481 INFO L229 MonitoredProcess]: Starting monitored process 17 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-31 03:34:58,502 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2023-08-31 03:34:58,550 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2023-08-31 03:34:58,550 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-31 03:34:58,551 INFO L263 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 12 conjunts are in the unsatisfiable core [2023-08-31 03:34:58,552 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-31 03:34:58,716 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-31 03:34:58,717 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-31 03:34:58,881 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-31 03:34:58,881 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1331670885] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-31 03:34:58,882 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-31 03:34:58,882 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 22 [2023-08-31 03:34:58,882 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [571674463] [2023-08-31 03:34:58,882 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-31 03:34:58,882 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2023-08-31 03:34:58,883 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-31 03:34:58,883 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2023-08-31 03:34:58,883 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=98, Invalid=364, Unknown=0, NotChecked=0, Total=462 [2023-08-31 03:34:59,009 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 55 out of 137 [2023-08-31 03:34:59,010 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 270 places, 680 transitions, 14937 flow. Second operand has 22 states, 22 states have (on average 57.18181818181818) internal successors, (1258), 22 states have internal predecessors, (1258), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 03:34:59,010 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-31 03:34:59,010 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 55 of 137 [2023-08-31 03:34:59,010 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-31 03:35:00,842 INFO L130 PetriNetUnfolder]: 2307/4500 cut-off events. [2023-08-31 03:35:00,843 INFO L131 PetriNetUnfolder]: For 80936/80936 co-relation queries the response was YES. [2023-08-31 03:35:00,871 INFO L83 FinitePrefix]: Finished finitePrefix Result has 36057 conditions, 4500 events. 2307/4500 cut-off events. For 80936/80936 co-relation queries the response was YES. Maximal size of possible extension queue 375. Compared 33669 event pairs, 7 based on Foata normal form. 76/4576 useless extension candidates. Maximal degree in co-relation 35504. Up to 905 conditions per place. [2023-08-31 03:35:00,891 INFO L137 encePairwiseOnDemand]: 129/137 looper letters, 276 selfloop transitions, 604 changer transitions 11/891 dead transitions. [2023-08-31 03:35:00,891 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 301 places, 891 transitions, 19573 flow [2023-08-31 03:35:00,892 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2023-08-31 03:35:00,892 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2023-08-31 03:35:00,894 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 1929 transitions. [2023-08-31 03:35:00,895 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44000912408759124 [2023-08-31 03:35:00,895 INFO L72 ComplementDD]: Start complementDD. Operand 32 states and 1929 transitions. [2023-08-31 03:35:00,896 INFO L73 IsDeterministic]: Start isDeterministic. Operand 32 states and 1929 transitions. [2023-08-31 03:35:00,896 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-31 03:35:00,896 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 32 states and 1929 transitions. [2023-08-31 03:35:00,899 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 33 states, 32 states have (on average 60.28125) internal successors, (1929), 32 states have internal predecessors, (1929), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 03:35:00,904 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 33 states, 33 states have (on average 137.0) internal successors, (4521), 33 states have internal predecessors, (4521), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 03:35:00,905 INFO L81 ComplementDD]: Finished complementDD. Result has 33 states, 33 states have (on average 137.0) internal successors, (4521), 33 states have internal predecessors, (4521), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 03:35:00,905 INFO L175 Difference]: Start difference. First operand has 270 places, 680 transitions, 14937 flow. Second operand 32 states and 1929 transitions. [2023-08-31 03:35:00,905 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 301 places, 891 transitions, 19573 flow [2023-08-31 03:35:01,540 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 293 places, 891 transitions, 19349 flow, removed 84 selfloop flow, removed 8 redundant places. [2023-08-31 03:35:01,554 INFO L231 Difference]: Finished difference. Result has 296 places, 754 transitions, 17585 flow [2023-08-31 03:35:01,555 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=137, PETRI_DIFFERENCE_MINUEND_FLOW=14731, PETRI_DIFFERENCE_MINUEND_PLACES=262, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=680, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=528, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=146, PETRI_DIFFERENCE_SUBTRAHEND_STATES=32, PETRI_FLOW=17585, PETRI_PLACES=296, PETRI_TRANSITIONS=754} [2023-08-31 03:35:01,556 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 276 predicate places. [2023-08-31 03:35:01,556 INFO L495 AbstractCegarLoop]: Abstraction has has 296 places, 754 transitions, 17585 flow [2023-08-31 03:35:01,556 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 57.18181818181818) internal successors, (1258), 22 states have internal predecessors, (1258), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 03:35:01,556 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 03:35:01,557 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-31 03:35:01,562 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2023-08-31 03:35:01,762 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2023-08-31 03:35:01,762 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-31 03:35:01,763 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 03:35:01,763 INFO L85 PathProgramCache]: Analyzing trace with hash 295045338, now seen corresponding path program 16 times [2023-08-31 03:35:01,763 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-31 03:35:01,763 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1985159036] [2023-08-31 03:35:01,763 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 03:35:01,763 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-31 03:35:01,772 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-31 03:35:01,887 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-31 03:35:01,887 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-31 03:35:01,887 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1985159036] [2023-08-31 03:35:01,887 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1985159036] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-31 03:35:01,888 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1057683423] [2023-08-31 03:35:01,888 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-08-31 03:35:01,888 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-31 03:35:01,888 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-31 03:35:01,889 INFO L229 MonitoredProcess]: Starting monitored process 18 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-31 03:35:01,907 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2023-08-31 03:35:01,945 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-08-31 03:35:01,946 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-31 03:35:01,947 INFO L263 TraceCheckSpWp]: Trace formula consists of 62 conjuncts, 9 conjunts are in the unsatisfiable core [2023-08-31 03:35:01,948 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-31 03:35:02,117 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 6 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-31 03:35:02,118 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-31 03:35:02,208 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-31 03:35:02,209 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1057683423] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-31 03:35:02,209 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-31 03:35:02,209 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 20 [2023-08-31 03:35:02,209 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [895814209] [2023-08-31 03:35:02,209 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-31 03:35:02,209 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2023-08-31 03:35:02,210 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-31 03:35:02,210 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2023-08-31 03:35:02,210 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=91, Invalid=289, Unknown=0, NotChecked=0, Total=380 [2023-08-31 03:35:02,321 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 55 out of 137 [2023-08-31 03:35:02,322 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 296 places, 754 transitions, 17585 flow. Second operand has 20 states, 20 states have (on average 56.75) internal successors, (1135), 20 states have internal predecessors, (1135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 03:35:02,322 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-31 03:35:02,322 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 55 of 137 [2023-08-31 03:35:02,322 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-31 03:35:04,488 INFO L130 PetriNetUnfolder]: 2667/5269 cut-off events. [2023-08-31 03:35:04,488 INFO L131 PetriNetUnfolder]: For 105280/105280 co-relation queries the response was YES. [2023-08-31 03:35:04,523 INFO L83 FinitePrefix]: Finished finitePrefix Result has 44006 conditions, 5269 events. 2667/5269 cut-off events. For 105280/105280 co-relation queries the response was YES. Maximal size of possible extension queue 439. Compared 41141 event pairs, 55 based on Foata normal form. 90/5359 useless extension candidates. Maximal degree in co-relation 43434. Up to 1397 conditions per place. [2023-08-31 03:35:04,540 INFO L137 encePairwiseOnDemand]: 129/137 looper letters, 462 selfloop transitions, 562 changer transitions 17/1041 dead transitions. [2023-08-31 03:35:04,541 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 333 places, 1041 transitions, 23867 flow [2023-08-31 03:35:04,541 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2023-08-31 03:35:04,541 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 38 states. [2023-08-31 03:35:04,543 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 2295 transitions. [2023-08-31 03:35:04,544 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44083749519784865 [2023-08-31 03:35:04,544 INFO L72 ComplementDD]: Start complementDD. Operand 38 states and 2295 transitions. [2023-08-31 03:35:04,544 INFO L73 IsDeterministic]: Start isDeterministic. Operand 38 states and 2295 transitions. [2023-08-31 03:35:04,545 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-31 03:35:04,545 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 38 states and 2295 transitions. [2023-08-31 03:35:04,548 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 39 states, 38 states have (on average 60.39473684210526) internal successors, (2295), 38 states have internal predecessors, (2295), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 03:35:04,553 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 39 states, 39 states have (on average 137.0) internal successors, (5343), 39 states have internal predecessors, (5343), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 03:35:04,554 INFO L81 ComplementDD]: Finished complementDD. Result has 39 states, 39 states have (on average 137.0) internal successors, (5343), 39 states have internal predecessors, (5343), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 03:35:04,554 INFO L175 Difference]: Start difference. First operand has 296 places, 754 transitions, 17585 flow. Second operand 38 states and 2295 transitions. [2023-08-31 03:35:04,554 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 333 places, 1041 transitions, 23867 flow [2023-08-31 03:35:05,376 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 317 places, 1041 transitions, 22444 flow, removed 216 selfloop flow, removed 16 redundant places. [2023-08-31 03:35:05,398 INFO L231 Difference]: Finished difference. Result has 325 places, 861 transitions, 20641 flow [2023-08-31 03:35:05,399 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=137, PETRI_DIFFERENCE_MINUEND_FLOW=16332, PETRI_DIFFERENCE_MINUEND_PLACES=280, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=752, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=457, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=248, PETRI_DIFFERENCE_SUBTRAHEND_STATES=38, PETRI_FLOW=20641, PETRI_PLACES=325, PETRI_TRANSITIONS=861} [2023-08-31 03:35:05,400 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 305 predicate places. [2023-08-31 03:35:05,400 INFO L495 AbstractCegarLoop]: Abstraction has has 325 places, 861 transitions, 20641 flow [2023-08-31 03:35:05,400 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 56.75) internal successors, (1135), 20 states have internal predecessors, (1135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 03:35:05,400 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 03:35:05,400 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-31 03:35:05,406 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Forceful destruction successful, exit code 0 [2023-08-31 03:35:05,606 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,18 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-31 03:35:05,606 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-31 03:35:05,607 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 03:35:05,607 INFO L85 PathProgramCache]: Analyzing trace with hash 344505820, now seen corresponding path program 17 times [2023-08-31 03:35:05,607 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-31 03:35:05,607 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2036680430] [2023-08-31 03:35:05,607 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 03:35:05,607 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-31 03:35:05,621 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-31 03:35:05,788 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-31 03:35:05,789 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-31 03:35:05,789 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2036680430] [2023-08-31 03:35:05,791 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2036680430] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-31 03:35:05,791 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1706287549] [2023-08-31 03:35:05,791 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-08-31 03:35:05,791 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-31 03:35:05,792 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-31 03:35:05,793 INFO L229 MonitoredProcess]: Starting monitored process 19 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-31 03:35:05,819 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2023-08-31 03:35:05,867 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2023-08-31 03:35:05,867 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-31 03:35:05,868 INFO L263 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 12 conjunts are in the unsatisfiable core [2023-08-31 03:35:05,869 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-31 03:35:05,978 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-31 03:35:05,978 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-31 03:35:06,160 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-31 03:35:06,160 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1706287549] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-31 03:35:06,160 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-31 03:35:06,160 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 23 [2023-08-31 03:35:06,160 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1153496653] [2023-08-31 03:35:06,160 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-31 03:35:06,161 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2023-08-31 03:35:06,161 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-31 03:35:06,161 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2023-08-31 03:35:06,162 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=114, Invalid=392, Unknown=0, NotChecked=0, Total=506 [2023-08-31 03:35:06,243 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 55 out of 137 [2023-08-31 03:35:06,243 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 325 places, 861 transitions, 20641 flow. Second operand has 23 states, 23 states have (on average 57.130434782608695) internal successors, (1314), 23 states have internal predecessors, (1314), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 03:35:06,244 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-31 03:35:06,244 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 55 of 137 [2023-08-31 03:35:06,244 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-31 03:35:08,557 INFO L130 PetriNetUnfolder]: 3133/6126 cut-off events. [2023-08-31 03:35:08,557 INFO L131 PetriNetUnfolder]: For 134558/134558 co-relation queries the response was YES. [2023-08-31 03:35:08,593 INFO L83 FinitePrefix]: Finished finitePrefix Result has 52873 conditions, 6126 events. 3133/6126 cut-off events. For 134558/134558 co-relation queries the response was YES. Maximal size of possible extension queue 520. Compared 48990 event pairs, 79 based on Foata normal form. 56/6182 useless extension candidates. Maximal degree in co-relation 52220. Up to 3060 conditions per place. [2023-08-31 03:35:08,620 INFO L137 encePairwiseOnDemand]: 129/137 looper letters, 494 selfloop transitions, 657 changer transitions 15/1166 dead transitions. [2023-08-31 03:35:08,620 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 352 places, 1166 transitions, 28460 flow [2023-08-31 03:35:08,621 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2023-08-31 03:35:08,621 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2023-08-31 03:35:08,622 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 1697 transitions. [2023-08-31 03:35:08,623 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44238790406673617 [2023-08-31 03:35:08,623 INFO L72 ComplementDD]: Start complementDD. Operand 28 states and 1697 transitions. [2023-08-31 03:35:08,623 INFO L73 IsDeterministic]: Start isDeterministic. Operand 28 states and 1697 transitions. [2023-08-31 03:35:08,624 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-31 03:35:08,624 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 28 states and 1697 transitions. [2023-08-31 03:35:08,626 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 29 states, 28 states have (on average 60.607142857142854) internal successors, (1697), 28 states have internal predecessors, (1697), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 03:35:08,630 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 29 states, 29 states have (on average 137.0) internal successors, (3973), 29 states have internal predecessors, (3973), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 03:35:08,631 INFO L81 ComplementDD]: Finished complementDD. Result has 29 states, 29 states have (on average 137.0) internal successors, (3973), 29 states have internal predecessors, (3973), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 03:35:08,631 INFO L175 Difference]: Start difference. First operand has 325 places, 861 transitions, 20641 flow. Second operand 28 states and 1697 transitions. [2023-08-31 03:35:08,631 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 352 places, 1166 transitions, 28460 flow [2023-08-31 03:35:09,839 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 327 places, 1166 transitions, 27809 flow, removed 143 selfloop flow, removed 25 redundant places. [2023-08-31 03:35:09,859 INFO L231 Difference]: Finished difference. Result has 338 places, 1024 transitions, 26136 flow [2023-08-31 03:35:09,860 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=137, PETRI_DIFFERENCE_MINUEND_FLOW=20148, PETRI_DIFFERENCE_MINUEND_PLACES=300, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=861, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=503, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=342, PETRI_DIFFERENCE_SUBTRAHEND_STATES=28, PETRI_FLOW=26136, PETRI_PLACES=338, PETRI_TRANSITIONS=1024} [2023-08-31 03:35:09,860 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 318 predicate places. [2023-08-31 03:35:09,861 INFO L495 AbstractCegarLoop]: Abstraction has has 338 places, 1024 transitions, 26136 flow [2023-08-31 03:35:09,861 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 57.130434782608695) internal successors, (1314), 23 states have internal predecessors, (1314), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 03:35:09,861 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 03:35:09,861 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-31 03:35:09,872 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Forceful destruction successful, exit code 0 [2023-08-31 03:35:10,067 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,19 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-31 03:35:10,067 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-31 03:35:10,067 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 03:35:10,067 INFO L85 PathProgramCache]: Analyzing trace with hash -764395770, now seen corresponding path program 18 times [2023-08-31 03:35:10,068 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-31 03:35:10,068 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1598353323] [2023-08-31 03:35:10,068 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 03:35:10,068 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-31 03:35:10,079 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-31 03:35:10,192 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-31 03:35:10,193 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-31 03:35:10,193 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1598353323] [2023-08-31 03:35:10,193 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1598353323] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-31 03:35:10,193 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1526833315] [2023-08-31 03:35:10,193 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-08-31 03:35:10,194 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-31 03:35:10,194 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-31 03:35:10,197 INFO L229 MonitoredProcess]: Starting monitored process 20 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-31 03:35:10,224 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2023-08-31 03:35:10,270 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2023-08-31 03:35:10,271 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-31 03:35:10,272 INFO L263 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 10 conjunts are in the unsatisfiable core [2023-08-31 03:35:10,273 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-31 03:35:10,375 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-31 03:35:10,375 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-31 03:35:10,535 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-31 03:35:10,536 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1526833315] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-31 03:35:10,536 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-31 03:35:10,536 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 23 [2023-08-31 03:35:10,537 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [170188975] [2023-08-31 03:35:10,537 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-31 03:35:10,537 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2023-08-31 03:35:10,538 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-31 03:35:10,538 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2023-08-31 03:35:10,538 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=106, Invalid=400, Unknown=0, NotChecked=0, Total=506 [2023-08-31 03:35:10,638 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 55 out of 137 [2023-08-31 03:35:10,639 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 338 places, 1024 transitions, 26136 flow. Second operand has 23 states, 23 states have (on average 57.130434782608695) internal successors, (1314), 23 states have internal predecessors, (1314), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 03:35:10,639 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-31 03:35:10,639 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 55 of 137 [2023-08-31 03:35:10,639 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-31 03:35:13,772 INFO L130 PetriNetUnfolder]: 3703/7260 cut-off events. [2023-08-31 03:35:13,772 INFO L131 PetriNetUnfolder]: For 189224/189224 co-relation queries the response was YES. [2023-08-31 03:35:13,818 INFO L83 FinitePrefix]: Finished finitePrefix Result has 66462 conditions, 7260 events. 3703/7260 cut-off events. For 189224/189224 co-relation queries the response was YES. Maximal size of possible extension queue 625. Compared 59810 event pairs, 105 based on Foata normal form. 168/7428 useless extension candidates. Maximal degree in co-relation 65752. Up to 2424 conditions per place. [2023-08-31 03:35:13,848 INFO L137 encePairwiseOnDemand]: 129/137 looper letters, 432 selfloop transitions, 909 changer transitions 20/1361 dead transitions. [2023-08-31 03:35:13,848 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 368 places, 1361 transitions, 35664 flow [2023-08-31 03:35:13,848 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2023-08-31 03:35:13,848 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 31 states. [2023-08-31 03:35:13,849 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 1871 transitions. [2023-08-31 03:35:13,850 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44054626795384977 [2023-08-31 03:35:13,850 INFO L72 ComplementDD]: Start complementDD. Operand 31 states and 1871 transitions. [2023-08-31 03:35:13,851 INFO L73 IsDeterministic]: Start isDeterministic. Operand 31 states and 1871 transitions. [2023-08-31 03:35:13,851 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-31 03:35:13,851 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 31 states and 1871 transitions. [2023-08-31 03:35:13,853 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 32 states, 31 states have (on average 60.354838709677416) internal successors, (1871), 31 states have internal predecessors, (1871), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 03:35:13,858 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 32 states, 32 states have (on average 137.0) internal successors, (4384), 32 states have internal predecessors, (4384), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 03:35:13,858 INFO L81 ComplementDD]: Finished complementDD. Result has 32 states, 32 states have (on average 137.0) internal successors, (4384), 32 states have internal predecessors, (4384), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 03:35:13,859 INFO L175 Difference]: Start difference. First operand has 338 places, 1024 transitions, 26136 flow. Second operand 31 states and 1871 transitions. [2023-08-31 03:35:13,859 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 368 places, 1361 transitions, 35664 flow [2023-08-31 03:35:15,779 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 361 places, 1361 transitions, 35350 flow, removed 133 selfloop flow, removed 7 redundant places. [2023-08-31 03:35:15,815 INFO L231 Difference]: Finished difference. Result has 369 places, 1213 transitions, 33651 flow [2023-08-31 03:35:15,817 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=137, PETRI_DIFFERENCE_MINUEND_FLOW=25837, PETRI_DIFFERENCE_MINUEND_PLACES=331, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1023, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=723, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=289, PETRI_DIFFERENCE_SUBTRAHEND_STATES=31, PETRI_FLOW=33651, PETRI_PLACES=369, PETRI_TRANSITIONS=1213} [2023-08-31 03:35:15,817 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 349 predicate places. [2023-08-31 03:35:15,817 INFO L495 AbstractCegarLoop]: Abstraction has has 369 places, 1213 transitions, 33651 flow [2023-08-31 03:35:15,818 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 57.130434782608695) internal successors, (1314), 23 states have internal predecessors, (1314), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 03:35:15,818 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 03:35:15,818 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-31 03:35:15,826 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Ended with exit code 0 [2023-08-31 03:35:16,023 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,20 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-31 03:35:16,024 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-31 03:35:16,024 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 03:35:16,024 INFO L85 PathProgramCache]: Analyzing trace with hash 1978622190, now seen corresponding path program 19 times [2023-08-31 03:35:16,024 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-31 03:35:16,024 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1709145143] [2023-08-31 03:35:16,024 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 03:35:16,025 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-31 03:35:16,036 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-31 03:35:16,166 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-31 03:35:16,167 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-31 03:35:16,167 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1709145143] [2023-08-31 03:35:16,167 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1709145143] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-31 03:35:16,167 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [352862737] [2023-08-31 03:35:16,167 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-08-31 03:35:16,167 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-31 03:35:16,168 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-31 03:35:16,169 INFO L229 MonitoredProcess]: Starting monitored process 21 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-31 03:35:16,195 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2023-08-31 03:35:16,242 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-31 03:35:16,243 INFO L263 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 11 conjunts are in the unsatisfiable core [2023-08-31 03:35:16,244 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-31 03:35:16,358 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-31 03:35:16,359 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-31 03:35:16,517 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-31 03:35:16,517 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [352862737] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-31 03:35:16,517 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-31 03:35:16,517 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 8] total 22 [2023-08-31 03:35:16,517 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1903111390] [2023-08-31 03:35:16,518 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-31 03:35:16,518 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2023-08-31 03:35:16,518 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-31 03:35:16,519 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2023-08-31 03:35:16,519 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=121, Invalid=341, Unknown=0, NotChecked=0, Total=462 [2023-08-31 03:35:16,595 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 55 out of 137 [2023-08-31 03:35:16,596 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 369 places, 1213 transitions, 33651 flow. Second operand has 22 states, 22 states have (on average 56.90909090909091) internal successors, (1252), 22 states have internal predecessors, (1252), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 03:35:16,596 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-31 03:35:16,596 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 55 of 137 [2023-08-31 03:35:16,596 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-31 03:35:20,275 INFO L130 PetriNetUnfolder]: 4062/8012 cut-off events. [2023-08-31 03:35:20,276 INFO L131 PetriNetUnfolder]: For 244787/244787 co-relation queries the response was YES. [2023-08-31 03:35:20,331 INFO L83 FinitePrefix]: Finished finitePrefix Result has 78412 conditions, 8012 events. 4062/8012 cut-off events. For 244787/244787 co-relation queries the response was YES. Maximal size of possible extension queue 708. Compared 67551 event pairs, 305 based on Foata normal form. 136/8148 useless extension candidates. Maximal degree in co-relation 77443. Up to 6222 conditions per place. [2023-08-31 03:35:20,362 INFO L137 encePairwiseOnDemand]: 129/137 looper letters, 1169 selfloop transitions, 271 changer transitions 17/1457 dead transitions. [2023-08-31 03:35:20,363 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 396 places, 1457 transitions, 41399 flow [2023-08-31 03:35:20,363 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2023-08-31 03:35:20,363 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2023-08-31 03:35:20,364 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 1696 transitions. [2023-08-31 03:35:20,365 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4421272158498436 [2023-08-31 03:35:20,365 INFO L72 ComplementDD]: Start complementDD. Operand 28 states and 1696 transitions. [2023-08-31 03:35:20,365 INFO L73 IsDeterministic]: Start isDeterministic. Operand 28 states and 1696 transitions. [2023-08-31 03:35:20,366 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-31 03:35:20,366 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 28 states and 1696 transitions. [2023-08-31 03:35:20,368 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 29 states, 28 states have (on average 60.57142857142857) internal successors, (1696), 28 states have internal predecessors, (1696), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 03:35:20,371 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 29 states, 29 states have (on average 137.0) internal successors, (3973), 29 states have internal predecessors, (3973), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 03:35:20,371 INFO L81 ComplementDD]: Finished complementDD. Result has 29 states, 29 states have (on average 137.0) internal successors, (3973), 29 states have internal predecessors, (3973), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 03:35:20,372 INFO L175 Difference]: Start difference. First operand has 369 places, 1213 transitions, 33651 flow. Second operand 28 states and 1696 transitions. [2023-08-31 03:35:20,372 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 396 places, 1457 transitions, 41399 flow [2023-08-31 03:35:23,051 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 383 places, 1457 transitions, 40967 flow, removed 173 selfloop flow, removed 13 redundant places. [2023-08-31 03:35:23,079 INFO L231 Difference]: Finished difference. Result has 393 places, 1327 transitions, 37600 flow [2023-08-31 03:35:23,080 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=137, PETRI_DIFFERENCE_MINUEND_FLOW=33219, PETRI_DIFFERENCE_MINUEND_PLACES=356, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1213, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=172, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=993, PETRI_DIFFERENCE_SUBTRAHEND_STATES=28, PETRI_FLOW=37600, PETRI_PLACES=393, PETRI_TRANSITIONS=1327} [2023-08-31 03:35:23,080 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 373 predicate places. [2023-08-31 03:35:23,080 INFO L495 AbstractCegarLoop]: Abstraction has has 393 places, 1327 transitions, 37600 flow [2023-08-31 03:35:23,081 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 56.90909090909091) internal successors, (1252), 22 states have internal predecessors, (1252), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 03:35:23,081 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 03:35:23,081 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-31 03:35:23,086 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Forceful destruction successful, exit code 0 [2023-08-31 03:35:23,281 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21 [2023-08-31 03:35:23,282 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-31 03:35:23,282 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 03:35:23,282 INFO L85 PathProgramCache]: Analyzing trace with hash 1120342306, now seen corresponding path program 20 times [2023-08-31 03:35:23,282 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-31 03:35:23,283 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1693391653] [2023-08-31 03:35:23,283 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 03:35:23,283 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-31 03:35:23,292 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-31 03:35:23,433 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-31 03:35:23,434 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-31 03:35:23,434 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1693391653] [2023-08-31 03:35:23,434 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1693391653] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-31 03:35:23,434 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1940810542] [2023-08-31 03:35:23,434 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-08-31 03:35:23,434 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-31 03:35:23,435 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-31 03:35:23,437 INFO L229 MonitoredProcess]: Starting monitored process 22 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-31 03:35:23,459 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2023-08-31 03:35:23,510 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-08-31 03:35:23,510 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-31 03:35:23,511 INFO L263 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 11 conjunts are in the unsatisfiable core [2023-08-31 03:35:23,512 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-31 03:35:23,616 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-31 03:35:23,616 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-31 03:35:23,767 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-31 03:35:23,768 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1940810542] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-31 03:35:23,768 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-31 03:35:23,768 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 8] total 22 [2023-08-31 03:35:23,768 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [525483880] [2023-08-31 03:35:23,769 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-31 03:35:23,769 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2023-08-31 03:35:23,769 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-31 03:35:23,770 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2023-08-31 03:35:23,770 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=121, Invalid=341, Unknown=0, NotChecked=0, Total=462 [2023-08-31 03:35:23,866 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 55 out of 137 [2023-08-31 03:35:23,867 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 393 places, 1327 transitions, 37600 flow. Second operand has 22 states, 22 states have (on average 56.90909090909091) internal successors, (1252), 22 states have internal predecessors, (1252), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 03:35:23,867 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-31 03:35:23,867 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 55 of 137 [2023-08-31 03:35:23,867 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-31 03:35:27,692 INFO L130 PetriNetUnfolder]: 3993/7827 cut-off events. [2023-08-31 03:35:27,693 INFO L131 PetriNetUnfolder]: For 248638/248638 co-relation queries the response was YES. [2023-08-31 03:35:27,754 INFO L83 FinitePrefix]: Finished finitePrefix Result has 77771 conditions, 7827 events. 3993/7827 cut-off events. For 248638/248638 co-relation queries the response was YES. Maximal size of possible extension queue 691. Compared 65373 event pairs, 49 based on Foata normal form. 18/7845 useless extension candidates. Maximal degree in co-relation 76868. Up to 2303 conditions per place. [2023-08-31 03:35:27,790 INFO L137 encePairwiseOnDemand]: 129/137 looper letters, 807 selfloop transitions, 610 changer transitions 15/1432 dead transitions. [2023-08-31 03:35:27,791 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 425 places, 1432 transitions, 41327 flow [2023-08-31 03:35:27,791 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2023-08-31 03:35:27,791 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 33 states. [2023-08-31 03:35:27,793 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 1967 transitions. [2023-08-31 03:35:27,793 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43508073435080735 [2023-08-31 03:35:27,793 INFO L72 ComplementDD]: Start complementDD. Operand 33 states and 1967 transitions. [2023-08-31 03:35:27,793 INFO L73 IsDeterministic]: Start isDeterministic. Operand 33 states and 1967 transitions. [2023-08-31 03:35:27,794 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-31 03:35:27,794 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 33 states and 1967 transitions. [2023-08-31 03:35:27,797 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 34 states, 33 states have (on average 59.60606060606061) internal successors, (1967), 33 states have internal predecessors, (1967), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 03:35:27,800 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 34 states, 34 states have (on average 137.0) internal successors, (4658), 34 states have internal predecessors, (4658), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 03:35:27,800 INFO L81 ComplementDD]: Finished complementDD. Result has 34 states, 34 states have (on average 137.0) internal successors, (4658), 34 states have internal predecessors, (4658), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 03:35:27,800 INFO L175 Difference]: Start difference. First operand has 393 places, 1327 transitions, 37600 flow. Second operand 33 states and 1967 transitions. [2023-08-31 03:35:27,801 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 425 places, 1432 transitions, 41327 flow [2023-08-31 03:35:30,528 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 410 places, 1432 transitions, 40963 flow, removed 111 selfloop flow, removed 15 redundant places. [2023-08-31 03:35:30,561 INFO L231 Difference]: Finished difference. Result has 414 places, 1332 transitions, 38544 flow [2023-08-31 03:35:30,562 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=137, PETRI_DIFFERENCE_MINUEND_FLOW=36823, PETRI_DIFFERENCE_MINUEND_PLACES=378, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1313, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=594, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=716, PETRI_DIFFERENCE_SUBTRAHEND_STATES=33, PETRI_FLOW=38544, PETRI_PLACES=414, PETRI_TRANSITIONS=1332} [2023-08-31 03:35:30,562 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 394 predicate places. [2023-08-31 03:35:30,562 INFO L495 AbstractCegarLoop]: Abstraction has has 414 places, 1332 transitions, 38544 flow [2023-08-31 03:35:30,563 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 56.90909090909091) internal successors, (1252), 22 states have internal predecessors, (1252), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 03:35:30,563 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 03:35:30,563 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-31 03:35:30,568 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Forceful destruction successful, exit code 0 [2023-08-31 03:35:30,763 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable22 [2023-08-31 03:35:30,764 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-31 03:35:30,764 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 03:35:30,764 INFO L85 PathProgramCache]: Analyzing trace with hash -198606537, now seen corresponding path program 21 times [2023-08-31 03:35:30,764 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-31 03:35:30,764 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1341716467] [2023-08-31 03:35:30,764 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 03:35:30,764 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-31 03:35:30,772 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-31 03:35:30,936 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 1 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-31 03:35:30,936 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-31 03:35:30,936 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1341716467] [2023-08-31 03:35:30,936 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1341716467] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-31 03:35:30,937 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1195226346] [2023-08-31 03:35:30,937 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-08-31 03:35:30,937 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-31 03:35:30,937 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-31 03:35:30,938 INFO L229 MonitoredProcess]: Starting monitored process 23 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-31 03:35:30,963 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2023-08-31 03:35:31,017 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2023-08-31 03:35:31,018 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-31 03:35:31,019 INFO L263 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 21 conjunts are in the unsatisfiable core [2023-08-31 03:35:31,020 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-31 03:35:31,195 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 5 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-31 03:35:31,195 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-31 03:35:31,416 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 1 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-31 03:35:31,417 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1195226346] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-31 03:35:31,417 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-31 03:35:31,417 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 29 [2023-08-31 03:35:31,417 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1424506777] [2023-08-31 03:35:31,417 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-31 03:35:31,420 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2023-08-31 03:35:31,423 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-31 03:35:31,423 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2023-08-31 03:35:31,424 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=185, Invalid=627, Unknown=0, NotChecked=0, Total=812 [2023-08-31 03:35:31,543 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 55 out of 137 [2023-08-31 03:35:31,543 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 414 places, 1332 transitions, 38544 flow. Second operand has 29 states, 29 states have (on average 56.96551724137931) internal successors, (1652), 29 states have internal predecessors, (1652), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 03:35:31,543 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-31 03:35:31,544 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 55 of 137 [2023-08-31 03:35:31,544 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-31 03:35:38,187 INFO L130 PetriNetUnfolder]: 5093/10127 cut-off events. [2023-08-31 03:35:38,187 INFO L131 PetriNetUnfolder]: For 335973/335973 co-relation queries the response was YES. [2023-08-31 03:35:38,285 INFO L83 FinitePrefix]: Finished finitePrefix Result has 102245 conditions, 10127 events. 5093/10127 cut-off events. For 335973/335973 co-relation queries the response was YES. Maximal size of possible extension queue 831. Compared 88862 event pairs, 11 based on Foata normal form. 180/10307 useless extension candidates. Maximal degree in co-relation 101503. Up to 2141 conditions per place. [2023-08-31 03:35:38,339 INFO L137 encePairwiseOnDemand]: 128/137 looper letters, 509 selfloop transitions, 1452 changer transitions 34/1995 dead transitions. [2023-08-31 03:35:38,339 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 475 places, 1995 transitions, 55850 flow [2023-08-31 03:35:38,340 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 63 states. [2023-08-31 03:35:38,340 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 63 states. [2023-08-31 03:35:38,343 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 3805 transitions. [2023-08-31 03:35:38,345 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4408527401228131 [2023-08-31 03:35:38,346 INFO L72 ComplementDD]: Start complementDD. Operand 63 states and 3805 transitions. [2023-08-31 03:35:38,346 INFO L73 IsDeterministic]: Start isDeterministic. Operand 63 states and 3805 transitions. [2023-08-31 03:35:38,347 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-31 03:35:38,347 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 63 states and 3805 transitions. [2023-08-31 03:35:38,353 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 64 states, 63 states have (on average 60.3968253968254) internal successors, (3805), 63 states have internal predecessors, (3805), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 03:35:38,364 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 64 states, 64 states have (on average 137.0) internal successors, (8768), 64 states have internal predecessors, (8768), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 03:35:38,365 INFO L81 ComplementDD]: Finished complementDD. Result has 64 states, 64 states have (on average 137.0) internal successors, (8768), 64 states have internal predecessors, (8768), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 03:35:38,365 INFO L175 Difference]: Start difference. First operand has 414 places, 1332 transitions, 38544 flow. Second operand 63 states and 3805 transitions. [2023-08-31 03:35:38,365 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 475 places, 1995 transitions, 55850 flow [2023-08-31 03:35:42,370 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 459 places, 1995 transitions, 54757 flow, removed 126 selfloop flow, removed 16 redundant places. [2023-08-31 03:35:42,412 INFO L231 Difference]: Finished difference. Result has 472 places, 1687 transitions, 50830 flow [2023-08-31 03:35:42,413 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=137, PETRI_DIFFERENCE_MINUEND_FLOW=37603, PETRI_DIFFERENCE_MINUEND_PLACES=397, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1330, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1105, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=191, PETRI_DIFFERENCE_SUBTRAHEND_STATES=63, PETRI_FLOW=50830, PETRI_PLACES=472, PETRI_TRANSITIONS=1687} [2023-08-31 03:35:42,414 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 452 predicate places. [2023-08-31 03:35:42,414 INFO L495 AbstractCegarLoop]: Abstraction has has 472 places, 1687 transitions, 50830 flow [2023-08-31 03:35:42,414 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 56.96551724137931) internal successors, (1652), 29 states have internal predecessors, (1652), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 03:35:42,415 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 03:35:42,415 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-31 03:35:42,423 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Forceful destruction successful, exit code 0 [2023-08-31 03:35:42,620 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23,23 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-31 03:35:42,621 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-31 03:35:42,621 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 03:35:42,622 INFO L85 PathProgramCache]: Analyzing trace with hash 175450710, now seen corresponding path program 22 times [2023-08-31 03:35:42,622 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-31 03:35:42,622 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1661473794] [2023-08-31 03:35:42,622 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 03:35:42,622 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-31 03:35:42,631 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-31 03:35:42,774 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 3 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-31 03:35:42,775 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-31 03:35:42,775 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1661473794] [2023-08-31 03:35:42,775 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1661473794] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-31 03:35:42,775 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [969762473] [2023-08-31 03:35:42,775 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-08-31 03:35:42,775 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-31 03:35:42,775 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-31 03:35:42,776 INFO L229 MonitoredProcess]: Starting monitored process 24 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-31 03:35:42,778 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Waiting until timeout for monitored process [2023-08-31 03:35:42,835 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-08-31 03:35:42,835 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-31 03:35:42,836 INFO L263 TraceCheckSpWp]: Trace formula consists of 131 conjuncts, 11 conjunts are in the unsatisfiable core [2023-08-31 03:35:42,837 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-31 03:35:42,875 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-31 03:35:42,876 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-31 03:35:42,954 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 7 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-31 03:35:42,955 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [969762473] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-31 03:35:42,955 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-31 03:35:42,955 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 5, 5] total 16 [2023-08-31 03:35:42,955 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [475573248] [2023-08-31 03:35:42,955 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-31 03:35:42,955 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2023-08-31 03:35:42,956 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-31 03:35:42,956 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2023-08-31 03:35:42,956 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=211, Unknown=0, NotChecked=0, Total=272 [2023-08-31 03:35:43,021 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 55 out of 137 [2023-08-31 03:35:43,021 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 472 places, 1687 transitions, 50830 flow. Second operand has 17 states, 17 states have (on average 57.35294117647059) internal successors, (975), 17 states have internal predecessors, (975), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 03:35:43,022 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-31 03:35:43,022 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 55 of 137 [2023-08-31 03:35:43,022 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-31 03:35:49,413 INFO L130 PetriNetUnfolder]: 5147/10159 cut-off events. [2023-08-31 03:35:49,413 INFO L131 PetriNetUnfolder]: For 366730/366730 co-relation queries the response was YES. [2023-08-31 03:35:49,516 INFO L83 FinitePrefix]: Finished finitePrefix Result has 109570 conditions, 10159 events. 5147/10159 cut-off events. For 366730/366730 co-relation queries the response was YES. Maximal size of possible extension queue 817. Compared 88392 event pairs, 123 based on Foata normal form. 104/10263 useless extension candidates. Maximal degree in co-relation 108420. Up to 2922 conditions per place. [2023-08-31 03:35:49,567 INFO L137 encePairwiseOnDemand]: 130/137 looper letters, 966 selfloop transitions, 926 changer transitions 37/1929 dead transitions. [2023-08-31 03:35:49,567 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 510 places, 1929 transitions, 58875 flow [2023-08-31 03:35:49,568 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2023-08-31 03:35:49,568 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 40 states. [2023-08-31 03:35:49,569 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 2408 transitions. [2023-08-31 03:35:49,570 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4394160583941606 [2023-08-31 03:35:49,570 INFO L72 ComplementDD]: Start complementDD. Operand 40 states and 2408 transitions. [2023-08-31 03:35:49,570 INFO L73 IsDeterministic]: Start isDeterministic. Operand 40 states and 2408 transitions. [2023-08-31 03:35:49,571 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-31 03:35:49,571 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 40 states and 2408 transitions. [2023-08-31 03:35:49,574 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 41 states, 40 states have (on average 60.2) internal successors, (2408), 40 states have internal predecessors, (2408), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 03:35:49,577 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 41 states, 41 states have (on average 137.0) internal successors, (5617), 41 states have internal predecessors, (5617), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 03:35:49,578 INFO L81 ComplementDD]: Finished complementDD. Result has 41 states, 41 states have (on average 137.0) internal successors, (5617), 41 states have internal predecessors, (5617), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 03:35:49,578 INFO L175 Difference]: Start difference. First operand has 472 places, 1687 transitions, 50830 flow. Second operand 40 states and 2408 transitions. [2023-08-31 03:35:49,578 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 510 places, 1929 transitions, 58875 flow [2023-08-31 03:35:53,877 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 492 places, 1929 transitions, 57886 flow, removed 399 selfloop flow, removed 18 redundant places. [2023-08-31 03:35:53,919 INFO L231 Difference]: Finished difference. Result has 506 places, 1780 transitions, 54982 flow [2023-08-31 03:35:53,920 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=137, PETRI_DIFFERENCE_MINUEND_FLOW=49860, PETRI_DIFFERENCE_MINUEND_PLACES=453, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1685, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=832, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=843, PETRI_DIFFERENCE_SUBTRAHEND_STATES=40, PETRI_FLOW=54982, PETRI_PLACES=506, PETRI_TRANSITIONS=1780} [2023-08-31 03:35:53,920 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 486 predicate places. [2023-08-31 03:35:53,920 INFO L495 AbstractCegarLoop]: Abstraction has has 506 places, 1780 transitions, 54982 flow [2023-08-31 03:35:53,921 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 57.35294117647059) internal successors, (975), 17 states have internal predecessors, (975), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 03:35:53,921 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 03:35:53,921 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-31 03:35:53,926 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Forceful destruction successful, exit code 0 [2023-08-31 03:35:54,121 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24,24 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-31 03:35:54,122 INFO L420 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-31 03:35:54,122 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 03:35:54,122 INFO L85 PathProgramCache]: Analyzing trace with hash -844978902, now seen corresponding path program 23 times [2023-08-31 03:35:54,122 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-31 03:35:54,122 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1537219899] [2023-08-31 03:35:54,122 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 03:35:54,123 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-31 03:35:54,142 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-31 03:35:54,294 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 4 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-31 03:35:54,294 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-31 03:35:54,294 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1537219899] [2023-08-31 03:35:54,295 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1537219899] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-31 03:35:54,295 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [226391496] [2023-08-31 03:35:54,295 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-08-31 03:35:54,295 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-31 03:35:54,295 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-31 03:35:54,296 INFO L229 MonitoredProcess]: Starting monitored process 25 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-31 03:35:54,299 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Waiting until timeout for monitored process [2023-08-31 03:35:54,366 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2023-08-31 03:35:54,366 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-31 03:35:54,367 INFO L263 TraceCheckSpWp]: Trace formula consists of 131 conjuncts, 13 conjunts are in the unsatisfiable core [2023-08-31 03:35:54,368 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-31 03:35:54,494 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 4 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-31 03:35:54,495 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-31 03:35:54,712 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 4 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-31 03:35:54,713 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [226391496] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-31 03:35:54,713 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-31 03:35:54,713 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 22 [2023-08-31 03:35:54,713 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2099729060] [2023-08-31 03:35:54,714 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-31 03:35:54,714 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2023-08-31 03:35:54,714 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-31 03:35:54,714 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2023-08-31 03:35:54,715 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=105, Invalid=401, Unknown=0, NotChecked=0, Total=506 [2023-08-31 03:35:54,843 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 55 out of 137 [2023-08-31 03:35:54,844 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 506 places, 1780 transitions, 54982 flow. Second operand has 23 states, 23 states have (on average 56.65217391304348) internal successors, (1303), 23 states have internal predecessors, (1303), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 03:35:54,844 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-31 03:35:54,844 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 55 of 137 [2023-08-31 03:35:54,844 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-31 03:36:02,085 INFO L130 PetriNetUnfolder]: 5828/11569 cut-off events. [2023-08-31 03:36:02,085 INFO L131 PetriNetUnfolder]: For 464965/464965 co-relation queries the response was YES. [2023-08-31 03:36:02,210 INFO L83 FinitePrefix]: Finished finitePrefix Result has 128173 conditions, 11569 events. 5828/11569 cut-off events. For 464965/464965 co-relation queries the response was YES. Maximal size of possible extension queue 914. Compared 102784 event pairs, 227 based on Foata normal form. 448/12017 useless extension candidates. Maximal degree in co-relation 127749. Up to 3242 conditions per place. [2023-08-31 03:36:02,275 INFO L137 encePairwiseOnDemand]: 130/137 looper letters, 750 selfloop transitions, 1405 changer transitions 35/2190 dead transitions. [2023-08-31 03:36:02,275 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 535 places, 2190 transitions, 69908 flow [2023-08-31 03:36:02,275 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2023-08-31 03:36:02,276 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 35 states. [2023-08-31 03:36:02,277 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 2106 transitions. [2023-08-31 03:36:02,278 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4392075078206465 [2023-08-31 03:36:02,278 INFO L72 ComplementDD]: Start complementDD. Operand 35 states and 2106 transitions. [2023-08-31 03:36:02,278 INFO L73 IsDeterministic]: Start isDeterministic. Operand 35 states and 2106 transitions. [2023-08-31 03:36:02,278 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-31 03:36:02,278 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 35 states and 2106 transitions. [2023-08-31 03:36:02,280 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 36 states, 35 states have (on average 60.17142857142857) internal successors, (2106), 35 states have internal predecessors, (2106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 03:36:02,282 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 36 states, 36 states have (on average 137.0) internal successors, (4932), 36 states have internal predecessors, (4932), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 03:36:02,283 INFO L81 ComplementDD]: Finished complementDD. Result has 36 states, 36 states have (on average 137.0) internal successors, (4932), 36 states have internal predecessors, (4932), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 03:36:02,283 INFO L175 Difference]: Start difference. First operand has 506 places, 1780 transitions, 54982 flow. Second operand 35 states and 2106 transitions. [2023-08-31 03:36:02,283 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 535 places, 2190 transitions, 69908 flow [2023-08-31 03:36:07,749 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 522 places, 2190 transitions, 67715 flow, removed 249 selfloop flow, removed 13 redundant places. [2023-08-31 03:36:07,802 INFO L231 Difference]: Finished difference. Result has 532 places, 1996 transitions, 65679 flow [2023-08-31 03:36:07,804 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=137, PETRI_DIFFERENCE_MINUEND_FLOW=53005, PETRI_DIFFERENCE_MINUEND_PLACES=488, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1770, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1197, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=522, PETRI_DIFFERENCE_SUBTRAHEND_STATES=35, PETRI_FLOW=65679, PETRI_PLACES=532, PETRI_TRANSITIONS=1996} [2023-08-31 03:36:07,804 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 512 predicate places. [2023-08-31 03:36:07,804 INFO L495 AbstractCegarLoop]: Abstraction has has 532 places, 1996 transitions, 65679 flow [2023-08-31 03:36:07,805 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 56.65217391304348) internal successors, (1303), 23 states have internal predecessors, (1303), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 03:36:07,805 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 03:36:07,805 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-31 03:36:07,813 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Forceful destruction successful, exit code 0 [2023-08-31 03:36:08,010 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 25 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable25 [2023-08-31 03:36:08,011 INFO L420 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-31 03:36:08,011 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 03:36:08,011 INFO L85 PathProgramCache]: Analyzing trace with hash 1262507224, now seen corresponding path program 24 times [2023-08-31 03:36:08,011 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-31 03:36:08,011 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1346800976] [2023-08-31 03:36:08,011 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 03:36:08,011 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-31 03:36:08,020 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-31 03:36:08,214 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 1 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-31 03:36:08,215 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-31 03:36:08,215 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1346800976] [2023-08-31 03:36:08,216 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1346800976] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-31 03:36:08,216 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [425930054] [2023-08-31 03:36:08,216 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-08-31 03:36:08,216 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-31 03:36:08,216 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-31 03:36:08,221 INFO L229 MonitoredProcess]: Starting monitored process 26 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-31 03:36:08,223 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Waiting until timeout for monitored process [2023-08-31 03:36:08,299 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2023-08-31 03:36:08,299 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-31 03:36:08,300 INFO L263 TraceCheckSpWp]: Trace formula consists of 131 conjuncts, 13 conjunts are in the unsatisfiable core [2023-08-31 03:36:08,301 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-31 03:36:08,421 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 1 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-31 03:36:08,421 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-31 03:36:08,633 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 2 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-31 03:36:08,633 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [425930054] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-31 03:36:08,633 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-31 03:36:08,634 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 23 [2023-08-31 03:36:08,634 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1404112715] [2023-08-31 03:36:08,634 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-31 03:36:08,634 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2023-08-31 03:36:08,634 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-31 03:36:08,634 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2023-08-31 03:36:08,635 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=118, Invalid=434, Unknown=0, NotChecked=0, Total=552 [2023-08-31 03:36:08,737 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 55 out of 137 [2023-08-31 03:36:08,737 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 532 places, 1996 transitions, 65679 flow. Second operand has 24 states, 24 states have (on average 56.708333333333336) internal successors, (1361), 24 states have internal predecessors, (1361), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 03:36:08,738 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-31 03:36:08,738 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 55 of 137 [2023-08-31 03:36:08,738 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-31 03:36:16,945 INFO L130 PetriNetUnfolder]: 6319/12549 cut-off events. [2023-08-31 03:36:16,946 INFO L131 PetriNetUnfolder]: For 547009/547009 co-relation queries the response was YES. [2023-08-31 03:36:17,081 INFO L83 FinitePrefix]: Finished finitePrefix Result has 148021 conditions, 12549 events. 6319/12549 cut-off events. For 547009/547009 co-relation queries the response was YES. Maximal size of possible extension queue 952. Compared 112724 event pairs, 533 based on Foata normal form. 240/12789 useless extension candidates. Maximal degree in co-relation 147322. Up to 9914 conditions per place. [2023-08-31 03:36:17,140 INFO L137 encePairwiseOnDemand]: 130/137 looper letters, 1858 selfloop transitions, 433 changer transitions 18/2309 dead transitions. [2023-08-31 03:36:17,141 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 555 places, 2309 transitions, 78847 flow [2023-08-31 03:36:17,141 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2023-08-31 03:36:17,141 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2023-08-31 03:36:17,142 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 1457 transitions. [2023-08-31 03:36:17,142 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4431265206812652 [2023-08-31 03:36:17,143 INFO L72 ComplementDD]: Start complementDD. Operand 24 states and 1457 transitions. [2023-08-31 03:36:17,143 INFO L73 IsDeterministic]: Start isDeterministic. Operand 24 states and 1457 transitions. [2023-08-31 03:36:17,143 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-31 03:36:17,143 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 24 states and 1457 transitions. [2023-08-31 03:36:17,145 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 25 states, 24 states have (on average 60.708333333333336) internal successors, (1457), 24 states have internal predecessors, (1457), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 03:36:17,147 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 25 states, 25 states have (on average 137.0) internal successors, (3425), 25 states have internal predecessors, (3425), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 03:36:17,147 INFO L81 ComplementDD]: Finished complementDD. Result has 25 states, 25 states have (on average 137.0) internal successors, (3425), 25 states have internal predecessors, (3425), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 03:36:17,147 INFO L175 Difference]: Start difference. First operand has 532 places, 1996 transitions, 65679 flow. Second operand 24 states and 1457 transitions. [2023-08-31 03:36:17,148 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 555 places, 2309 transitions, 78847 flow [2023-08-31 03:36:24,681 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 541 places, 2309 transitions, 77988 flow, removed 348 selfloop flow, removed 14 redundant places. [2023-08-31 03:36:24,731 INFO L231 Difference]: Finished difference. Result has 552 places, 2179 transitions, 73089 flow [2023-08-31 03:36:24,732 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=137, PETRI_DIFFERENCE_MINUEND_FLOW=64850, PETRI_DIFFERENCE_MINUEND_PLACES=518, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1996, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=276, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=1685, PETRI_DIFFERENCE_SUBTRAHEND_STATES=24, PETRI_FLOW=73089, PETRI_PLACES=552, PETRI_TRANSITIONS=2179} [2023-08-31 03:36:24,733 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 532 predicate places. [2023-08-31 03:36:24,733 INFO L495 AbstractCegarLoop]: Abstraction has has 552 places, 2179 transitions, 73089 flow [2023-08-31 03:36:24,733 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 56.708333333333336) internal successors, (1361), 24 states have internal predecessors, (1361), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 03:36:24,733 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 03:36:24,733 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-31 03:36:24,738 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Ended with exit code 0 [2023-08-31 03:36:24,934 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2023-08-31 03:36:24,934 INFO L420 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-31 03:36:24,934 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 03:36:24,934 INFO L85 PathProgramCache]: Analyzing trace with hash 1865710427, now seen corresponding path program 25 times [2023-08-31 03:36:24,934 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-31 03:36:24,934 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1456890123] [2023-08-31 03:36:24,934 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 03:36:24,935 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-31 03:36:24,943 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-31 03:36:25,092 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 3 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-31 03:36:25,092 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-31 03:36:25,092 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1456890123] [2023-08-31 03:36:25,092 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1456890123] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-31 03:36:25,092 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [490133751] [2023-08-31 03:36:25,093 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-08-31 03:36:25,093 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-31 03:36:25,093 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-31 03:36:25,097 INFO L229 MonitoredProcess]: Starting monitored process 27 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-31 03:36:25,100 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Waiting until timeout for monitored process [2023-08-31 03:36:25,193 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-31 03:36:25,193 INFO L263 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 15 conjunts are in the unsatisfiable core [2023-08-31 03:36:25,194 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-31 03:36:25,284 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 6 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-31 03:36:25,284 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-31 03:36:25,612 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 6 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-31 03:36:25,612 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [490133751] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-31 03:36:25,612 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-31 03:36:25,612 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 26 [2023-08-31 03:36:25,613 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [229732905] [2023-08-31 03:36:25,613 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-31 03:36:25,613 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2023-08-31 03:36:25,613 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-31 03:36:25,614 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2023-08-31 03:36:25,614 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=138, Invalid=512, Unknown=0, NotChecked=0, Total=650 [2023-08-31 03:36:25,723 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 55 out of 137 [2023-08-31 03:36:25,724 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 552 places, 2179 transitions, 73089 flow. Second operand has 26 states, 26 states have (on average 56.96153846153846) internal successors, (1481), 26 states have internal predecessors, (1481), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 03:36:25,724 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-31 03:36:25,724 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 55 of 137 [2023-08-31 03:36:25,724 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-31 03:36:35,910 INFO L130 PetriNetUnfolder]: 7426/14580 cut-off events. [2023-08-31 03:36:35,910 INFO L131 PetriNetUnfolder]: For 646625/646625 co-relation queries the response was YES. [2023-08-31 03:36:36,214 INFO L83 FinitePrefix]: Finished finitePrefix Result has 175183 conditions, 14580 events. 7426/14580 cut-off events. For 646625/646625 co-relation queries the response was YES. Maximal size of possible extension queue 1122. Compared 132510 event pairs, 104 based on Foata normal form. 66/14646 useless extension candidates. Maximal degree in co-relation 174260. Up to 4042 conditions per place. [2023-08-31 03:36:36,321 INFO L137 encePairwiseOnDemand]: 130/137 looper letters, 663 selfloop transitions, 2215 changer transitions 51/2929 dead transitions. [2023-08-31 03:36:36,321 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 585 places, 2929 transitions, 98252 flow [2023-08-31 03:36:36,321 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2023-08-31 03:36:36,321 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2023-08-31 03:36:36,323 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 2071 transitions. [2023-08-31 03:36:36,324 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4446114212108201 [2023-08-31 03:36:36,324 INFO L72 ComplementDD]: Start complementDD. Operand 34 states and 2071 transitions. [2023-08-31 03:36:36,324 INFO L73 IsDeterministic]: Start isDeterministic. Operand 34 states and 2071 transitions. [2023-08-31 03:36:36,325 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-31 03:36:36,325 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 34 states and 2071 transitions. [2023-08-31 03:36:36,328 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 35 states, 34 states have (on average 60.911764705882355) internal successors, (2071), 34 states have internal predecessors, (2071), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 03:36:36,331 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 35 states, 35 states have (on average 137.0) internal successors, (4795), 35 states have internal predecessors, (4795), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 03:36:36,332 INFO L81 ComplementDD]: Finished complementDD. Result has 35 states, 35 states have (on average 137.0) internal successors, (4795), 35 states have internal predecessors, (4795), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 03:36:36,332 INFO L175 Difference]: Start difference. First operand has 552 places, 2179 transitions, 73089 flow. Second operand 34 states and 2071 transitions. [2023-08-31 03:36:36,332 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 585 places, 2929 transitions, 98252 flow [2023-08-31 03:36:47,707 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 575 places, 2929 transitions, 97725 flow, removed 227 selfloop flow, removed 10 redundant places. [2023-08-31 03:36:47,770 INFO L231 Difference]: Finished difference. Result has 583 places, 2543 transitions, 92010 flow [2023-08-31 03:36:47,771 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=137, PETRI_DIFFERENCE_MINUEND_FLOW=72614, PETRI_DIFFERENCE_MINUEND_PLACES=542, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=2179, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1852, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=320, PETRI_DIFFERENCE_SUBTRAHEND_STATES=34, PETRI_FLOW=92010, PETRI_PLACES=583, PETRI_TRANSITIONS=2543} [2023-08-31 03:36:47,771 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 563 predicate places. [2023-08-31 03:36:47,772 INFO L495 AbstractCegarLoop]: Abstraction has has 583 places, 2543 transitions, 92010 flow [2023-08-31 03:36:47,772 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 56.96153846153846) internal successors, (1481), 26 states have internal predecessors, (1481), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 03:36:47,772 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 03:36:47,772 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-31 03:36:47,778 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Forceful destruction successful, exit code 0 [2023-08-31 03:36:47,976 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27 [2023-08-31 03:36:47,976 INFO L420 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-31 03:36:47,977 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 03:36:47,977 INFO L85 PathProgramCache]: Analyzing trace with hash -1412434121, now seen corresponding path program 26 times [2023-08-31 03:36:47,977 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-31 03:36:47,977 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1137660504] [2023-08-31 03:36:47,977 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 03:36:47,977 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-31 03:36:47,988 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-31 03:36:48,121 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-31 03:36:48,122 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-31 03:36:48,122 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1137660504] [2023-08-31 03:36:48,122 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1137660504] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-31 03:36:48,122 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1983513953] [2023-08-31 03:36:48,122 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-08-31 03:36:48,122 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-31 03:36:48,123 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-31 03:36:48,124 INFO L229 MonitoredProcess]: Starting monitored process 28 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-31 03:36:48,126 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Waiting until timeout for monitored process [2023-08-31 03:36:48,199 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-08-31 03:36:48,199 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-31 03:36:48,200 INFO L263 TraceCheckSpWp]: Trace formula consists of 138 conjuncts, 19 conjunts are in the unsatisfiable core [2023-08-31 03:36:48,201 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-31 03:36:48,251 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-31 03:36:48,251 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-31 03:36:48,512 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 10 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-31 03:36:48,513 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1983513953] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-31 03:36:48,513 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-31 03:36:48,513 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 9] total 13 [2023-08-31 03:36:48,513 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1437935025] [2023-08-31 03:36:48,514 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-31 03:36:48,514 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2023-08-31 03:36:48,514 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-31 03:36:48,514 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2023-08-31 03:36:48,515 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=147, Unknown=0, NotChecked=0, Total=210 [2023-08-31 03:36:48,543 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 64 out of 137 [2023-08-31 03:36:48,544 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 583 places, 2543 transitions, 92010 flow. Second operand has 15 states, 15 states have (on average 66.33333333333333) internal successors, (995), 15 states have internal predecessors, (995), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 03:36:48,544 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-31 03:36:48,544 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 64 of 137 [2023-08-31 03:36:48,544 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-31 03:37:06,185 INFO L130 PetriNetUnfolder]: 10420/20394 cut-off events. [2023-08-31 03:37:06,185 INFO L131 PetriNetUnfolder]: For 1021786/1021790 co-relation queries the response was YES. [2023-08-31 03:37:06,440 INFO L83 FinitePrefix]: Finished finitePrefix Result has 258512 conditions, 20394 events. 10420/20394 cut-off events. For 1021786/1021790 co-relation queries the response was YES. Maximal size of possible extension queue 1486. Compared 194177 event pairs, 705 based on Foata normal form. 6/20393 useless extension candidates. Maximal degree in co-relation 257449. Up to 7919 conditions per place. [2023-08-31 03:37:06,552 INFO L137 encePairwiseOnDemand]: 133/137 looper letters, 1798 selfloop transitions, 1910 changer transitions 71/3792 dead transitions. [2023-08-31 03:37:06,553 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 589 places, 3792 transitions, 139482 flow [2023-08-31 03:37:06,553 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-08-31 03:37:06,553 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2023-08-31 03:37:06,554 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 516 transitions. [2023-08-31 03:37:06,554 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5380604796663191 [2023-08-31 03:37:06,554 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 516 transitions. [2023-08-31 03:37:06,554 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 516 transitions. [2023-08-31 03:37:06,555 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-31 03:37:06,555 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 516 transitions. [2023-08-31 03:37:06,555 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 73.71428571428571) internal successors, (516), 7 states have internal predecessors, (516), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 03:37:06,556 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 137.0) internal successors, (1096), 8 states have internal predecessors, (1096), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 03:37:06,557 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 137.0) internal successors, (1096), 8 states have internal predecessors, (1096), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 03:37:06,557 INFO L175 Difference]: Start difference. First operand has 583 places, 2543 transitions, 92010 flow. Second operand 7 states and 516 transitions. [2023-08-31 03:37:06,557 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 589 places, 3792 transitions, 139482 flow [2023-08-31 03:37:25,821 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 576 places, 3792 transitions, 136869 flow, removed 1218 selfloop flow, removed 13 redundant places. [2023-08-31 03:37:25,919 INFO L231 Difference]: Finished difference. Result has 581 places, 3366 transitions, 129443 flow [2023-08-31 03:37:25,922 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=137, PETRI_DIFFERENCE_MINUEND_FLOW=90481, PETRI_DIFFERENCE_MINUEND_PLACES=570, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=2543, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1086, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=633, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=129443, PETRI_PLACES=581, PETRI_TRANSITIONS=3366} [2023-08-31 03:37:25,922 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 561 predicate places. [2023-08-31 03:37:25,923 INFO L495 AbstractCegarLoop]: Abstraction has has 581 places, 3366 transitions, 129443 flow [2023-08-31 03:37:25,923 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 66.33333333333333) internal successors, (995), 15 states have internal predecessors, (995), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 03:37:25,923 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 03:37:25,923 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-31 03:37:25,932 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Forceful destruction successful, exit code 0 [2023-08-31 03:37:26,128 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2023-08-31 03:37:26,129 INFO L420 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-31 03:37:26,129 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 03:37:26,129 INFO L85 PathProgramCache]: Analyzing trace with hash -1079980299, now seen corresponding path program 27 times [2023-08-31 03:37:26,129 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-31 03:37:26,129 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1743310229] [2023-08-31 03:37:26,129 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 03:37:26,130 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-31 03:37:26,138 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-31 03:37:26,298 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 1 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-31 03:37:26,299 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-31 03:37:26,299 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1743310229] [2023-08-31 03:37:26,299 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1743310229] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-31 03:37:26,299 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1313336421] [2023-08-31 03:37:26,299 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-08-31 03:37:26,299 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-31 03:37:26,299 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-31 03:37:26,301 INFO L229 MonitoredProcess]: Starting monitored process 29 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-31 03:37:26,305 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Waiting until timeout for monitored process [2023-08-31 03:37:26,380 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2023-08-31 03:37:26,380 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-31 03:37:26,381 INFO L263 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 15 conjunts are in the unsatisfiable core [2023-08-31 03:37:26,382 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-31 03:37:26,525 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 3 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-31 03:37:26,525 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-31 03:37:26,707 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 3 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-31 03:37:26,708 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1313336421] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-31 03:37:26,708 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-31 03:37:26,708 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 27 [2023-08-31 03:37:26,708 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [942705630] [2023-08-31 03:37:26,708 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-31 03:37:26,709 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2023-08-31 03:37:26,709 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-31 03:37:26,709 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2023-08-31 03:37:26,709 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=136, Invalid=566, Unknown=0, NotChecked=0, Total=702 [2023-08-31 03:37:26,821 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 55 out of 137 [2023-08-31 03:37:26,822 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 581 places, 3366 transitions, 129443 flow. Second operand has 27 states, 27 states have (on average 56.96296296296296) internal successors, (1538), 27 states have internal predecessors, (1538), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 03:37:26,822 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-31 03:37:26,822 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 55 of 137 [2023-08-31 03:37:26,823 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-31 03:37:53,415 INFO L130 PetriNetUnfolder]: 11506/22564 cut-off events. [2023-08-31 03:37:53,415 INFO L131 PetriNetUnfolder]: For 1238342/1238342 co-relation queries the response was YES. [2023-08-31 03:37:53,753 INFO L83 FinitePrefix]: Finished finitePrefix Result has 297807 conditions, 22564 events. 11506/22564 cut-off events. For 1238342/1238342 co-relation queries the response was YES. Maximal size of possible extension queue 1724. Compared 218432 event pairs, 7 based on Foata normal form. 172/22736 useless extension candidates. Maximal degree in co-relation 296654. Up to 5155 conditions per place. [2023-08-31 03:37:54,020 INFO L137 encePairwiseOnDemand]: 129/137 looper letters, 613 selfloop transitions, 3375 changer transitions 24/4012 dead transitions. [2023-08-31 03:37:54,021 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 627 places, 4012 transitions, 156394 flow [2023-08-31 03:37:54,024 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2023-08-31 03:37:54,025 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 47 states. [2023-08-31 03:37:54,026 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 2845 transitions. [2023-08-31 03:37:54,027 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44183879484391986 [2023-08-31 03:37:54,028 INFO L72 ComplementDD]: Start complementDD. Operand 47 states and 2845 transitions. [2023-08-31 03:37:54,028 INFO L73 IsDeterministic]: Start isDeterministic. Operand 47 states and 2845 transitions. [2023-08-31 03:37:54,028 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-31 03:37:54,028 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 47 states and 2845 transitions. [2023-08-31 03:37:54,031 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 48 states, 47 states have (on average 60.53191489361702) internal successors, (2845), 47 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) [2023-08-31 03:37:54,035 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 48 states, 48 states have (on average 137.0) internal successors, (6576), 48 states have internal predecessors, (6576), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 03:37:54,036 INFO L81 ComplementDD]: Finished complementDD. Result has 48 states, 48 states have (on average 137.0) internal successors, (6576), 48 states have internal predecessors, (6576), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 03:37:54,036 INFO L175 Difference]: Start difference. First operand has 581 places, 3366 transitions, 129443 flow. Second operand 47 states and 2845 transitions. [2023-08-31 03:37:54,036 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 627 places, 4012 transitions, 156394 flow [2023-08-31 03:38:20,427 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 625 places, 4012 transitions, 155030 flow, removed 649 selfloop flow, removed 2 redundant places. [2023-08-31 03:38:20,567 INFO L231 Difference]: Finished difference. Result has 626 places, 3718 transitions, 148508 flow [2023-08-31 03:38:20,570 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=137, PETRI_DIFFERENCE_MINUEND_FLOW=128441, PETRI_DIFFERENCE_MINUEND_PLACES=579, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=3366, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3006, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=353, PETRI_DIFFERENCE_SUBTRAHEND_STATES=47, PETRI_FLOW=148508, PETRI_PLACES=626, PETRI_TRANSITIONS=3718} [2023-08-31 03:38:20,570 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 606 predicate places. [2023-08-31 03:38:20,570 INFO L495 AbstractCegarLoop]: Abstraction has has 626 places, 3718 transitions, 148508 flow [2023-08-31 03:38:20,571 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 56.96296296296296) internal successors, (1538), 27 states have internal predecessors, (1538), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 03:38:20,571 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 03:38:20,571 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-31 03:38:20,579 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Forceful destruction successful, exit code 0 [2023-08-31 03:38:20,776 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,29 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-31 03:38:20,777 INFO L420 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-31 03:38:20,777 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 03:38:20,777 INFO L85 PathProgramCache]: Analyzing trace with hash -570063603, now seen corresponding path program 28 times [2023-08-31 03:38:20,777 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-31 03:38:20,777 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [47966755] [2023-08-31 03:38:20,777 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 03:38:20,779 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-31 03:38:20,787 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-31 03:38:20,936 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 1 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-31 03:38:20,937 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-31 03:38:20,937 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [47966755] [2023-08-31 03:38:20,937 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [47966755] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-31 03:38:20,938 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [580359171] [2023-08-31 03:38:20,938 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-08-31 03:38:20,938 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-31 03:38:20,938 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-31 03:38:20,941 INFO L229 MonitoredProcess]: Starting monitored process 30 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-31 03:38:20,948 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Waiting until timeout for monitored process [2023-08-31 03:38:21,010 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-08-31 03:38:21,011 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-31 03:38:21,011 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 17 conjunts are in the unsatisfiable core [2023-08-31 03:38:21,012 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-31 03:38:21,200 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 6 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-31 03:38:21,200 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-31 03:38:21,373 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 3 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-31 03:38:21,375 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [580359171] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-31 03:38:21,375 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-31 03:38:21,375 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 26 [2023-08-31 03:38:21,375 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1881817654] [2023-08-31 03:38:21,376 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-31 03:38:21,376 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2023-08-31 03:38:21,376 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-31 03:38:21,376 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2023-08-31 03:38:21,377 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=129, Invalid=521, Unknown=0, NotChecked=0, Total=650 [2023-08-31 03:38:21,498 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 55 out of 137 [2023-08-31 03:38:21,498 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 626 places, 3718 transitions, 148508 flow. Second operand has 26 states, 26 states have (on average 56.88461538461539) internal successors, (1479), 26 states have internal predecessors, (1479), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 03:38:21,499 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-31 03:38:21,499 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 55 of 137 [2023-08-31 03:38:21,499 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-31 03:38:55,522 INFO L130 PetriNetUnfolder]: 12790/25146 cut-off events. [2023-08-31 03:38:55,522 INFO L131 PetriNetUnfolder]: For 1462728/1462728 co-relation queries the response was YES. [2023-08-31 03:38:56,067 INFO L83 FinitePrefix]: Finished finitePrefix Result has 339191 conditions, 25146 events. 12790/25146 cut-off events. For 1462728/1462728 co-relation queries the response was YES. Maximal size of possible extension queue 1901. Compared 247961 event pairs, 257 based on Foata normal form. 278/25424 useless extension candidates. Maximal degree in co-relation 337997. Up to 8557 conditions per place. [2023-08-31 03:38:56,218 INFO L137 encePairwiseOnDemand]: 128/137 looper letters, 1887 selfloop transitions, 2564 changer transitions 19/4470 dead transitions. [2023-08-31 03:38:56,219 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 684 places, 4470 transitions, 179281 flow [2023-08-31 03:38:56,219 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 59 states. [2023-08-31 03:38:56,219 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 59 states. [2023-08-31 03:38:56,221 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 3547 transitions. [2023-08-31 03:38:56,221 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43882221947296796 [2023-08-31 03:38:56,222 INFO L72 ComplementDD]: Start complementDD. Operand 59 states and 3547 transitions. [2023-08-31 03:38:56,222 INFO L73 IsDeterministic]: Start isDeterministic. Operand 59 states and 3547 transitions. [2023-08-31 03:38:56,222 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-31 03:38:56,222 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 59 states and 3547 transitions. [2023-08-31 03:38:56,225 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 60 states, 59 states have (on average 60.11864406779661) internal successors, (3547), 59 states have internal predecessors, (3547), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 03:38:56,230 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 60 states, 60 states have (on average 137.0) internal successors, (8220), 60 states have internal predecessors, (8220), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 03:38:56,230 INFO L81 ComplementDD]: Finished complementDD. Result has 60 states, 60 states have (on average 137.0) internal successors, (8220), 60 states have internal predecessors, (8220), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 03:38:56,231 INFO L175 Difference]: Start difference. First operand has 626 places, 3718 transitions, 148508 flow. Second operand 59 states and 3547 transitions. [2023-08-31 03:38:56,231 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 684 places, 4470 transitions, 179281 flow [2023-08-31 03:39:27,727 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 667 places, 4470 transitions, 177826 flow, removed 292 selfloop flow, removed 17 redundant places. [2023-08-31 03:39:27,898 INFO L231 Difference]: Finished difference. Result has 677 places, 4134 transitions, 170891 flow [2023-08-31 03:39:27,901 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=137, PETRI_DIFFERENCE_MINUEND_FLOW=147113, PETRI_DIFFERENCE_MINUEND_PLACES=609, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=3713, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2255, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=1340, PETRI_DIFFERENCE_SUBTRAHEND_STATES=59, PETRI_FLOW=170891, PETRI_PLACES=677, PETRI_TRANSITIONS=4134} [2023-08-31 03:39:27,902 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 657 predicate places. [2023-08-31 03:39:27,902 INFO L495 AbstractCegarLoop]: Abstraction has has 677 places, 4134 transitions, 170891 flow [2023-08-31 03:39:27,902 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 56.88461538461539) internal successors, (1479), 26 states have internal predecessors, (1479), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 03:39:27,903 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 03:39:27,903 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-31 03:39:27,911 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Forceful destruction successful, exit code 0 [2023-08-31 03:39:28,111 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30,30 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-31 03:39:28,111 INFO L420 AbstractCegarLoop]: === Iteration 32 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-31 03:39:28,111 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 03:39:28,111 INFO L85 PathProgramCache]: Analyzing trace with hash 2007987801, now seen corresponding path program 29 times [2023-08-31 03:39:28,111 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-31 03:39:28,112 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [637682635] [2023-08-31 03:39:28,112 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 03:39:28,112 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-31 03:39:28,123 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-31 03:39:28,273 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 5 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-31 03:39:28,273 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-31 03:39:28,273 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [637682635] [2023-08-31 03:39:28,274 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [637682635] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-31 03:39:28,274 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [979182570] [2023-08-31 03:39:28,274 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-08-31 03:39:28,274 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-31 03:39:28,274 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-31 03:39:28,275 INFO L229 MonitoredProcess]: Starting monitored process 31 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-31 03:39:28,276 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Waiting until timeout for monitored process [2023-08-31 03:39:28,339 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2023-08-31 03:39:28,339 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-31 03:39:28,340 INFO L263 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 11 conjunts are in the unsatisfiable core [2023-08-31 03:39:28,341 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-31 03:39:28,558 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 10 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-31 03:39:28,558 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-31 03:39:28,714 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 7 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-31 03:39:28,714 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [979182570] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-31 03:39:28,715 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-31 03:39:28,715 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 25 [2023-08-31 03:39:28,715 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2043172050] [2023-08-31 03:39:28,715 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-31 03:39:28,716 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2023-08-31 03:39:28,716 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-31 03:39:28,716 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2023-08-31 03:39:28,716 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=137, Invalid=463, Unknown=0, NotChecked=0, Total=600 [2023-08-31 03:39:28,844 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 55 out of 137 [2023-08-31 03:39:28,845 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 677 places, 4134 transitions, 170891 flow. Second operand has 25 states, 25 states have (on average 56.6) internal successors, (1415), 25 states have internal predecessors, (1415), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 03:39:28,845 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-31 03:39:28,846 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 55 of 137 [2023-08-31 03:39:28,846 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-31 03:40:10,733 INFO L130 PetriNetUnfolder]: 13442/26547 cut-off events. [2023-08-31 03:40:10,733 INFO L131 PetriNetUnfolder]: For 1687724/1687724 co-relation queries the response was YES. [2023-08-31 03:40:11,814 INFO L83 FinitePrefix]: Finished finitePrefix Result has 367912 conditions, 26547 events. 13442/26547 cut-off events. For 1687724/1687724 co-relation queries the response was YES. Maximal size of possible extension queue 2014. Compared 265533 event pairs, 167 based on Foata normal form. 198/26745 useless extension candidates. Maximal degree in co-relation 366717. Up to 6011 conditions per place. [2023-08-31 03:40:11,980 INFO L137 encePairwiseOnDemand]: 129/137 looper letters, 1338 selfloop transitions, 3366 changer transitions 6/4710 dead transitions. [2023-08-31 03:40:11,981 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 746 places, 4710 transitions, 194345 flow [2023-08-31 03:40:11,981 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 73 states. [2023-08-31 03:40:11,981 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 73 states. [2023-08-31 03:40:11,983 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 73 states to 73 states and 4384 transitions. [2023-08-31 03:40:11,985 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4383561643835616 [2023-08-31 03:40:11,985 INFO L72 ComplementDD]: Start complementDD. Operand 73 states and 4384 transitions. [2023-08-31 03:40:11,985 INFO L73 IsDeterministic]: Start isDeterministic. Operand 73 states and 4384 transitions. [2023-08-31 03:40:11,986 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-31 03:40:11,986 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 73 states and 4384 transitions. [2023-08-31 03:40:11,990 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 74 states, 73 states have (on average 60.054794520547944) internal successors, (4384), 73 states have internal predecessors, (4384), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 03:40:11,997 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 74 states, 74 states have (on average 137.0) internal successors, (10138), 74 states have internal predecessors, (10138), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 03:40:11,997 INFO L81 ComplementDD]: Finished complementDD. Result has 74 states, 74 states have (on average 137.0) internal successors, (10138), 74 states have internal predecessors, (10138), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 03:40:11,997 INFO L175 Difference]: Start difference. First operand has 677 places, 4134 transitions, 170891 flow. Second operand 73 states and 4384 transitions. [2023-08-31 03:40:11,998 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 746 places, 4710 transitions, 194345 flow [2023-08-31 03:40:50,288 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 705 places, 4710 transitions, 192161 flow, removed 387 selfloop flow, removed 41 redundant places. [2023-08-31 03:40:50,435 INFO L231 Difference]: Finished difference. Result has 712 places, 4362 transitions, 186521 flow [2023-08-31 03:40:50,438 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=137, PETRI_DIFFERENCE_MINUEND_FLOW=168503, PETRI_DIFFERENCE_MINUEND_PLACES=633, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=4122, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3126, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=835, PETRI_DIFFERENCE_SUBTRAHEND_STATES=73, PETRI_FLOW=186521, PETRI_PLACES=712, PETRI_TRANSITIONS=4362} [2023-08-31 03:40:50,438 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 692 predicate places. [2023-08-31 03:40:50,438 INFO L495 AbstractCegarLoop]: Abstraction has has 712 places, 4362 transitions, 186521 flow [2023-08-31 03:40:50,439 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 56.6) internal successors, (1415), 25 states have internal predecessors, (1415), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 03:40:50,439 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 03:40:50,439 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-31 03:40:50,444 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Forceful destruction successful, exit code 0 [2023-08-31 03:40:50,641 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 31 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable31 [2023-08-31 03:40:50,641 INFO L420 AbstractCegarLoop]: === Iteration 33 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-31 03:40:50,641 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 03:40:50,641 INFO L85 PathProgramCache]: Analyzing trace with hash -1247701379, now seen corresponding path program 30 times [2023-08-31 03:40:50,642 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-31 03:40:50,642 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2126701754] [2023-08-31 03:40:50,642 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 03:40:50,644 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-31 03:40:50,653 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-31 03:40:50,791 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 1 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-31 03:40:50,791 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-31 03:40:50,791 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2126701754] [2023-08-31 03:40:50,792 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2126701754] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-31 03:40:50,792 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1899363820] [2023-08-31 03:40:50,792 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-08-31 03:40:50,792 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-31 03:40:50,792 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-31 03:40:50,793 INFO L229 MonitoredProcess]: Starting monitored process 32 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-31 03:40:50,795 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Waiting until timeout for monitored process [2023-08-31 03:40:50,859 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2023-08-31 03:40:50,859 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-31 03:40:50,860 INFO L263 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 15 conjunts are in the unsatisfiable core [2023-08-31 03:40:50,861 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-31 03:40:50,967 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 6 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-31 03:40:50,968 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-31 03:40:51,207 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 2 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-31 03:40:51,207 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1899363820] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-31 03:40:51,208 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-31 03:40:51,208 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 28 [2023-08-31 03:40:51,208 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [820233681] [2023-08-31 03:40:51,208 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-31 03:40:51,208 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2023-08-31 03:40:51,208 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-31 03:40:51,209 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2023-08-31 03:40:51,209 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=156, Invalid=600, Unknown=0, NotChecked=0, Total=756 [2023-08-31 03:40:51,328 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 55 out of 137 [2023-08-31 03:40:51,329 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 712 places, 4362 transitions, 186521 flow. Second operand has 28 states, 28 states have (on average 56.92857142857143) internal successors, (1594), 28 states have internal predecessors, (1594), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 03:40:51,329 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-31 03:40:51,329 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 55 of 137 [2023-08-31 03:40:51,329 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-31 03:41:46,891 INFO L130 PetriNetUnfolder]: 14093/27798 cut-off events. [2023-08-31 03:41:46,891 INFO L131 PetriNetUnfolder]: For 1832570/1832570 co-relation queries the response was YES. [2023-08-31 03:41:48,091 INFO L83 FinitePrefix]: Finished finitePrefix Result has 394317 conditions, 27798 events. 14093/27798 cut-off events. For 1832570/1832570 co-relation queries the response was YES. Maximal size of possible extension queue 2152. Compared 279662 event pairs, 199 based on Foata normal form. 126/27924 useless extension candidates. Maximal degree in co-relation 393110. Up to 8540 conditions per place. [2023-08-31 03:41:48,323 INFO L137 encePairwiseOnDemand]: 129/137 looper letters, 871 selfloop transitions, 3890 changer transitions 17/4778 dead transitions. [2023-08-31 03:41:48,324 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 752 places, 4778 transitions, 208282 flow [2023-08-31 03:41:48,324 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2023-08-31 03:41:48,324 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 41 states. [2023-08-31 03:41:48,326 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 2480 transitions. [2023-08-31 03:41:48,327 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44151682392736336 [2023-08-31 03:41:48,327 INFO L72 ComplementDD]: Start complementDD. Operand 41 states and 2480 transitions. [2023-08-31 03:41:48,327 INFO L73 IsDeterministic]: Start isDeterministic. Operand 41 states and 2480 transitions. [2023-08-31 03:41:48,328 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-31 03:41:48,328 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 41 states and 2480 transitions. [2023-08-31 03:41:48,330 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 42 states, 41 states have (on average 60.48780487804878) internal successors, (2480), 41 states have internal predecessors, (2480), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 03:41:48,333 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 42 states, 42 states have (on average 137.0) internal successors, (5754), 42 states have internal predecessors, (5754), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 03:41:48,334 INFO L81 ComplementDD]: Finished complementDD. Result has 42 states, 42 states have (on average 137.0) internal successors, (5754), 42 states have internal predecessors, (5754), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 03:41:48,334 INFO L175 Difference]: Start difference. First operand has 712 places, 4362 transitions, 186521 flow. Second operand 41 states and 2480 transitions. [2023-08-31 03:41:48,334 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 752 places, 4778 transitions, 208282 flow [2023-08-31 03:42:34,426 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 710 places, 4778 transitions, 206235 flow, removed 359 selfloop flow, removed 42 redundant places. [2023-08-31 03:42:34,574 INFO L231 Difference]: Finished difference. Result has 720 places, 4585 transitions, 205454 flow [2023-08-31 03:42:34,577 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=137, PETRI_DIFFERENCE_MINUEND_FLOW=184563, PETRI_DIFFERENCE_MINUEND_PLACES=670, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=4362, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3666, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=644, PETRI_DIFFERENCE_SUBTRAHEND_STATES=41, PETRI_FLOW=205454, PETRI_PLACES=720, PETRI_TRANSITIONS=4585} [2023-08-31 03:42:34,577 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 700 predicate places. [2023-08-31 03:42:34,577 INFO L495 AbstractCegarLoop]: Abstraction has has 720 places, 4585 transitions, 205454 flow [2023-08-31 03:42:34,577 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 56.92857142857143) internal successors, (1594), 28 states have internal predecessors, (1594), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 03:42:34,577 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 03:42:34,577 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-31 03:42:34,582 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Forceful destruction successful, exit code 0 [2023-08-31 03:42:34,778 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32,32 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-31 03:42:34,778 INFO L420 AbstractCegarLoop]: === Iteration 34 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-31 03:42:34,778 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 03:42:34,778 INFO L85 PathProgramCache]: Analyzing trace with hash -374253849, now seen corresponding path program 31 times [2023-08-31 03:42:34,779 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-31 03:42:34,779 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1647752503] [2023-08-31 03:42:34,779 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 03:42:34,779 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-31 03:42:34,786 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-31 03:42:34,934 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 5 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-31 03:42:34,934 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-31 03:42:34,935 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1647752503] [2023-08-31 03:42:34,935 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1647752503] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-31 03:42:34,935 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1153446540] [2023-08-31 03:42:34,935 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-08-31 03:42:34,935 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-31 03:42:34,936 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-31 03:42:34,937 INFO L229 MonitoredProcess]: Starting monitored process 33 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-31 03:42:34,943 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Waiting until timeout for monitored process [2023-08-31 03:42:35,017 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-31 03:42:35,018 INFO L263 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 14 conjunts are in the unsatisfiable core [2023-08-31 03:42:35,019 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-31 03:42:35,138 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 7 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-31 03:42:35,139 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-31 03:42:35,387 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 5 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-31 03:42:35,388 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1153446540] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-31 03:42:35,388 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-31 03:42:35,388 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 27 [2023-08-31 03:42:35,388 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1807808892] [2023-08-31 03:42:35,389 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-31 03:42:35,389 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2023-08-31 03:42:35,389 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-31 03:42:35,389 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2023-08-31 03:42:35,390 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=187, Invalid=515, Unknown=0, NotChecked=0, Total=702 [2023-08-31 03:42:35,488 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 55 out of 137 [2023-08-31 03:42:35,489 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 720 places, 4585 transitions, 205454 flow. Second operand has 27 states, 27 states have (on average 56.74074074074074) internal successors, (1532), 27 states have internal predecessors, (1532), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 03:42:35,489 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-31 03:42:35,489 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 55 of 137 [2023-08-31 03:42:35,489 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-31 03:43:37,659 INFO L130 PetriNetUnfolder]: 15802/31241 cut-off events. [2023-08-31 03:43:37,659 INFO L131 PetriNetUnfolder]: For 2252934/2252934 co-relation queries the response was YES. [2023-08-31 03:43:38,658 INFO L83 FinitePrefix]: Finished finitePrefix Result has 455355 conditions, 31241 events. 15802/31241 cut-off events. For 2252934/2252934 co-relation queries the response was YES. Maximal size of possible extension queue 2295. Compared 319383 event pairs, 238 based on Foata normal form. 104/31345 useless extension candidates. Maximal degree in co-relation 453557. Up to 6871 conditions per place. [2023-08-31 03:43:38,852 INFO L137 encePairwiseOnDemand]: 129/137 looper letters, 564 selfloop transitions, 4778 changer transitions 13/5355 dead transitions. [2023-08-31 03:43:38,852 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 781 places, 5355 transitions, 241091 flow [2023-08-31 03:43:38,852 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 62 states. [2023-08-31 03:43:38,852 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 62 states. [2023-08-31 03:43:38,854 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 3710 transitions. [2023-08-31 03:43:38,855 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4367789027548858 [2023-08-31 03:43:38,855 INFO L72 ComplementDD]: Start complementDD. Operand 62 states and 3710 transitions. [2023-08-31 03:43:38,855 INFO L73 IsDeterministic]: Start isDeterministic. Operand 62 states and 3710 transitions. [2023-08-31 03:43:38,856 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-31 03:43:38,856 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 62 states and 3710 transitions. [2023-08-31 03:43:38,858 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 63 states, 62 states have (on average 59.83870967741935) internal successors, (3710), 62 states have internal predecessors, (3710), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 03:43:38,862 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 63 states, 63 states have (on average 137.0) internal successors, (8631), 63 states have internal predecessors, (8631), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 03:43:38,862 INFO L81 ComplementDD]: Finished complementDD. Result has 63 states, 63 states have (on average 137.0) internal successors, (8631), 63 states have internal predecessors, (8631), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 03:43:38,863 INFO L175 Difference]: Start difference. First operand has 720 places, 4585 transitions, 205454 flow. Second operand 62 states and 3710 transitions. [2023-08-31 03:43:38,863 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 781 places, 5355 transitions, 241091 flow [2023-08-31 03:44:36,088 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 766 places, 5355 transitions, 240645 flow, removed 147 selfloop flow, removed 15 redundant places. [2023-08-31 03:44:36,304 INFO L231 Difference]: Finished difference. Result has 781 places, 5166 transitions, 243311 flow [2023-08-31 03:44:36,308 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=137, PETRI_DIFFERENCE_MINUEND_FLOW=204975, PETRI_DIFFERENCE_MINUEND_PLACES=705, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=4584, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4215, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=299, PETRI_DIFFERENCE_SUBTRAHEND_STATES=62, PETRI_FLOW=243311, PETRI_PLACES=781, PETRI_TRANSITIONS=5166} [2023-08-31 03:44:36,309 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 761 predicate places. [2023-08-31 03:44:36,309 INFO L495 AbstractCegarLoop]: Abstraction has has 781 places, 5166 transitions, 243311 flow [2023-08-31 03:44:36,309 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 56.74074074074074) internal successors, (1532), 27 states have internal predecessors, (1532), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 03:44:36,309 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 03:44:36,310 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-31 03:44:36,318 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Forceful destruction successful, exit code 0 [2023-08-31 03:44:36,515 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33,33 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-31 03:44:36,515 INFO L420 AbstractCegarLoop]: === Iteration 35 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-31 03:44:36,515 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 03:44:36,516 INFO L85 PathProgramCache]: Analyzing trace with hash 843710407, now seen corresponding path program 32 times [2023-08-31 03:44:36,516 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-31 03:44:36,516 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2058802832] [2023-08-31 03:44:36,516 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 03:44:36,516 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-31 03:44:36,523 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-31 03:44:36,659 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 6 proven. 9 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-31 03:44:36,659 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-31 03:44:36,659 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2058802832] [2023-08-31 03:44:36,660 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2058802832] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-31 03:44:36,660 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2039493563] [2023-08-31 03:44:36,660 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-08-31 03:44:36,660 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-31 03:44:36,660 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-31 03:44:36,662 INFO L229 MonitoredProcess]: Starting monitored process 34 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-31 03:44:36,669 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Waiting until timeout for monitored process [2023-08-31 03:44:36,748 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-08-31 03:44:36,748 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-31 03:44:36,750 INFO L263 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 15 conjunts are in the unsatisfiable core [2023-08-31 03:44:36,751 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-31 03:44:36,885 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 8 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-31 03:44:36,885 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-31 03:44:37,097 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 7 proven. 8 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-31 03:44:37,097 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2039493563] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-31 03:44:37,097 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-31 03:44:37,097 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11, 10] total 27 [2023-08-31 03:44:37,098 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [505512876] [2023-08-31 03:44:37,098 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-31 03:44:37,098 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2023-08-31 03:44:37,098 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-31 03:44:37,098 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2023-08-31 03:44:37,099 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=159, Invalid=543, Unknown=0, NotChecked=0, Total=702 [2023-08-31 03:44:37,211 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 55 out of 137 [2023-08-31 03:44:37,212 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 781 places, 5166 transitions, 243311 flow. Second operand has 27 states, 27 states have (on average 56.81481481481482) internal successors, (1534), 27 states have internal predecessors, (1534), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 03:44:37,212 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-31 03:44:37,212 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 55 of 137 [2023-08-31 03:44:37,212 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-31 03:46:07,237 INFO L130 PetriNetUnfolder]: 17620/34603 cut-off events. [2023-08-31 03:46:07,238 INFO L131 PetriNetUnfolder]: For 2812587/2812587 co-relation queries the response was YES. [2023-08-31 03:46:08,918 INFO L83 FinitePrefix]: Finished finitePrefix Result has 539688 conditions, 34603 events. 17620/34603 cut-off events. For 2812587/2812587 co-relation queries the response was YES. Maximal size of possible extension queue 2584. Compared 358028 event pairs, 237 based on Foata normal form. 684/35287 useless extension candidates. Maximal degree in co-relation 537878. Up to 11657 conditions per place. [2023-08-31 03:46:09,141 INFO L137 encePairwiseOnDemand]: 129/137 looper letters, 1721 selfloop transitions, 4292 changer transitions 91/6104 dead transitions. [2023-08-31 03:46:09,141 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 822 places, 6104 transitions, 293304 flow [2023-08-31 03:46:09,141 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2023-08-31 03:46:09,141 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 44 states. [2023-08-31 03:46:09,142 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 2660 transitions. [2023-08-31 03:46:09,143 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44127405441274054 [2023-08-31 03:46:09,143 INFO L72 ComplementDD]: Start complementDD. Operand 44 states and 2660 transitions. [2023-08-31 03:46:09,143 INFO L73 IsDeterministic]: Start isDeterministic. Operand 44 states and 2660 transitions. [2023-08-31 03:46:09,144 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-31 03:46:09,144 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 44 states and 2660 transitions. [2023-08-31 03:46:09,146 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 45 states, 44 states have (on average 60.45454545454545) internal successors, (2660), 44 states have internal predecessors, (2660), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 03:46:09,149 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 45 states, 45 states have (on average 137.0) internal successors, (6165), 45 states have internal predecessors, (6165), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 03:46:09,150 INFO L81 ComplementDD]: Finished complementDD. Result has 45 states, 45 states have (on average 137.0) internal successors, (6165), 45 states have internal predecessors, (6165), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 03:46:09,150 INFO L175 Difference]: Start difference. First operand has 781 places, 5166 transitions, 243311 flow. Second operand 44 states and 2660 transitions. [2023-08-31 03:46:09,150 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 822 places, 6104 transitions, 293304 flow [2023-08-31 03:47:47,318 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 798 places, 6104 transitions, 287470 flow, removed 1162 selfloop flow, removed 24 redundant places. [2023-08-31 03:47:47,578 INFO L231 Difference]: Finished difference. Result has 810 places, 5778 transitions, 280384 flow [2023-08-31 03:47:47,582 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=137, PETRI_DIFFERENCE_MINUEND_FLOW=238068, PETRI_DIFFERENCE_MINUEND_PLACES=755, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=5150, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3632, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=1365, PETRI_DIFFERENCE_SUBTRAHEND_STATES=44, PETRI_FLOW=280384, PETRI_PLACES=810, PETRI_TRANSITIONS=5778} [2023-08-31 03:47:47,583 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 790 predicate places. [2023-08-31 03:47:47,583 INFO L495 AbstractCegarLoop]: Abstraction has has 810 places, 5778 transitions, 280384 flow [2023-08-31 03:47:47,584 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 56.81481481481482) internal successors, (1534), 27 states have internal predecessors, (1534), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 03:47:47,584 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 03:47:47,584 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-31 03:47:47,593 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Ended with exit code 0 [2023-08-31 03:47:47,790 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 34 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable34 [2023-08-31 03:47:47,791 INFO L420 AbstractCegarLoop]: === Iteration 36 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-31 03:47:47,791 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 03:47:47,791 INFO L85 PathProgramCache]: Analyzing trace with hash 1484966421, now seen corresponding path program 33 times [2023-08-31 03:47:47,791 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-31 03:47:47,791 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [562415636] [2023-08-31 03:47:47,792 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 03:47:47,792 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-31 03:47:47,808 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-31 03:47:48,003 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 4 proven. 15 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-31 03:47:48,004 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-31 03:47:48,004 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [562415636] [2023-08-31 03:47:48,004 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [562415636] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-31 03:47:48,004 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [363044373] [2023-08-31 03:47:48,004 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-08-31 03:47:48,005 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-31 03:47:48,005 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-31 03:47:48,006 INFO L229 MonitoredProcess]: Starting monitored process 35 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-31 03:47:48,014 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Waiting until timeout for monitored process [2023-08-31 03:47:48,087 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2023-08-31 03:47:48,087 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-31 03:47:48,088 INFO L263 TraceCheckSpWp]: Trace formula consists of 138 conjuncts, 18 conjunts are in the unsatisfiable core [2023-08-31 03:47:48,090 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-31 03:47:48,290 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 4 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-31 03:47:48,290 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-31 03:47:48,740 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 5 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-31 03:47:48,740 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [363044373] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-31 03:47:48,740 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-31 03:47:48,741 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 12, 12] total 28 [2023-08-31 03:47:48,741 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [978874297] [2023-08-31 03:47:48,741 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-31 03:47:48,741 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2023-08-31 03:47:48,742 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-31 03:47:48,742 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2023-08-31 03:47:48,742 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=184, Invalid=628, Unknown=0, NotChecked=0, Total=812 [2023-08-31 03:47:48,883 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 55 out of 137 [2023-08-31 03:47:48,884 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 810 places, 5778 transitions, 280384 flow. Second operand has 29 states, 29 states have (on average 56.58620689655172) internal successors, (1641), 29 states have internal predecessors, (1641), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 03:47:48,884 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-31 03:47:48,884 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 55 of 137 [2023-08-31 03:47:48,884 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand Killed by 15