./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 BEFORE --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version b8dbc81d Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerReach.xml -i ../../../trunk/examples/svcomp/weaver/popl20-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 BEFORE --- Real Ultimate output --- This is Ultimate 0.2.3-?-b8dbc81 [2023-09-01 14:19:47,709 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-09-01 14:19:47,711 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-09-01 14:19:47,731 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2023-09-01 14:19:47,736 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2023-09-01 14:19:47,739 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2023-09-01 14:19:47,741 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2023-09-01 14:19:47,743 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2023-09-01 14:19:47,745 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2023-09-01 14:19:47,748 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2023-09-01 14:19:47,749 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2023-09-01 14:19:47,750 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2023-09-01 14:19:47,752 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2023-09-01 14:19:47,754 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2023-09-01 14:19:47,756 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2023-09-01 14:19:47,757 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2023-09-01 14:19:47,758 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2023-09-01 14:19:47,759 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2023-09-01 14:19:47,760 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2023-09-01 14:19:47,763 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2023-09-01 14:19:47,766 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2023-09-01 14:19:47,767 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2023-09-01 14:19:47,767 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2023-09-01 14:19:47,768 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2023-09-01 14:19:47,771 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2023-09-01 14:19:47,780 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2023-09-01 14:19:47,781 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2023-09-01 14:19:47,781 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2023-09-01 14:19:47,781 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2023-09-01 14:19:47,782 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2023-09-01 14:19:47,784 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2023-09-01 14:19:47,784 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2023-09-01 14:19:47,785 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2023-09-01 14:19:47,786 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2023-09-01 14:19:47,787 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2023-09-01 14:19:47,787 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2023-09-01 14:19:47,793 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2023-09-01 14:19:47,793 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2023-09-01 14:19:47,793 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2023-09-01 14:19:47,794 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2023-09-01 14:19:47,794 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2023-09-01 14:19:47,795 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2023-09-01 14:19:47,823 INFO L113 SettingsManager]: Loading preferences was successful [2023-09-01 14:19:47,823 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-09-01 14:19:47,824 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-09-01 14:19:47,824 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-09-01 14:19:47,824 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-09-01 14:19:47,824 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-09-01 14:19:47,825 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-09-01 14:19:47,825 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2023-09-01 14:19:47,825 INFO L138 SettingsManager]: * Use SBE=true [2023-09-01 14:19:47,825 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-09-01 14:19:47,826 INFO L138 SettingsManager]: * sizeof long=4 [2023-09-01 14:19:47,826 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-09-01 14:19:47,826 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-09-01 14:19:47,826 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-09-01 14:19:47,826 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-09-01 14:19:47,826 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-09-01 14:19:47,827 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-09-01 14:19:47,827 INFO L138 SettingsManager]: * sizeof long double=12 [2023-09-01 14:19:47,827 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2023-09-01 14:19:47,827 INFO L138 SettingsManager]: * Use constant arrays=true [2023-09-01 14:19:47,827 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-09-01 14:19:47,827 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-09-01 14:19:47,827 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-09-01 14:19:47,827 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-09-01 14:19:47,828 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-09-01 14:19:47,828 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-09-01 14:19:47,828 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-09-01 14:19:47,828 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-09-01 14:19:47,828 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2023-09-01 14:19:47,828 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-09-01 14:19:47,828 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-09-01 14:19:47,829 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-09-01 14:19:47,829 INFO L138 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-09-01 14:19:47,829 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-09-01 14:19:47,829 INFO L138 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-09-01 14:19:47,829 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> c17307c3ae663be4a153b702602dea6d5ee45f14a080e7a1fb720e97140b770f Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: When to check the insufficient erros location relative to the other error locations -> BEFORE [2023-09-01 14:19:48,039 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-09-01 14:19:48,052 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-09-01 14:19:48,054 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-09-01 14:19:48,054 INFO L271 PluginConnector]: Initializing CDTParser... [2023-09-01 14:19:48,055 INFO L275 PluginConnector]: CDTParser initialized [2023-09-01 14:19:48,055 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/weaver/popl20-nonblocking-cntr.wvr.c [2023-09-01 14:19:49,007 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-09-01 14:19:49,135 INFO L351 CDTParser]: Found 1 translation units. [2023-09-01 14:19:49,136 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/weaver/popl20-nonblocking-cntr.wvr.c [2023-09-01 14:19:49,140 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/69fd00f8f/b50b9ce092b84b338a54d89055ca5dda/FLAG6456f650d [2023-09-01 14:19:49,148 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/69fd00f8f/b50b9ce092b84b338a54d89055ca5dda [2023-09-01 14:19:49,150 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-09-01 14:19:49,150 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2023-09-01 14:19:49,151 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-09-01 14:19:49,151 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-09-01 14:19:49,153 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-09-01 14:19:49,154 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 01.09 02:19:49" (1/1) ... [2023-09-01 14:19:49,154 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7e3ee41a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 02:19:49, skipping insertion in model container [2023-09-01 14:19:49,154 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 01.09 02:19:49" (1/1) ... [2023-09-01 14:19:49,158 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-09-01 14:19:49,167 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-09-01 14:19:49,277 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] [2023-09-01 14:19:49,280 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-09-01 14:19:49,285 INFO L203 MainTranslator]: Completed pre-run [2023-09-01 14:19:49,304 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] [2023-09-01 14:19:49,309 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-09-01 14:19:49,315 WARN L667 CHandler]: The function __VERIFIER_atomic_begin is called, but not defined or handled by StandardFunctionHandler. [2023-09-01 14:19:49,315 WARN L667 CHandler]: The function __VERIFIER_atomic_end is called, but not defined or handled by StandardFunctionHandler. [2023-09-01 14:19:49,319 INFO L208 MainTranslator]: Completed translation [2023-09-01 14:19:49,319 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 02:19:49 WrapperNode [2023-09-01 14:19:49,319 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-09-01 14:19:49,320 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-09-01 14:19:49,320 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-09-01 14:19:49,321 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2023-09-01 14:19:49,324 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 02:19:49" (1/1) ... [2023-09-01 14:19:49,331 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 02:19:49" (1/1) ... [2023-09-01 14:19:49,345 INFO L138 Inliner]: procedures = 21, calls = 24, calls flagged for inlining = 4, calls inlined = 4, statements flattened = 54 [2023-09-01 14:19:49,345 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-09-01 14:19:49,346 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-09-01 14:19:49,347 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2023-09-01 14:19:49,347 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2023-09-01 14:19:49,352 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 02:19:49" (1/1) ... [2023-09-01 14:19:49,352 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 02:19:49" (1/1) ... [2023-09-01 14:19:49,360 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 02:19:49" (1/1) ... [2023-09-01 14:19:49,361 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 02:19:49" (1/1) ... [2023-09-01 14:19:49,369 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 02:19:49" (1/1) ... [2023-09-01 14:19:49,372 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 02:19:49" (1/1) ... [2023-09-01 14:19:49,376 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 02:19:49" (1/1) ... [2023-09-01 14:19:49,379 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 02:19:49" (1/1) ... [2023-09-01 14:19:49,380 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-09-01 14:19:49,381 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-09-01 14:19:49,381 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2023-09-01 14:19:49,381 INFO L275 PluginConnector]: RCFGBuilder initialized [2023-09-01 14:19:49,382 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 02:19:49" (1/1) ... [2023-09-01 14:19:49,385 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-09-01 14:19:49,393 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-09-01 14:19:49,401 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-09-01 14:19:49,416 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-09-01 14:19:49,432 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-09-01 14:19:49,432 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2023-09-01 14:19:49,433 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2023-09-01 14:19:49,433 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2023-09-01 14:19:49,434 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2023-09-01 14:19:49,434 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-09-01 14:19:49,434 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-09-01 14:19:49,434 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-09-01 14:19:49,434 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2023-09-01 14:19:49,435 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2023-09-01 14:19:49,435 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-09-01 14:19:49,435 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-09-01 14:19:49,435 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-09-01 14:19:49,435 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-09-01 14:19:49,436 WARN L210 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement [2023-09-01 14:19:49,512 INFO L236 CfgBuilder]: Building ICFG [2023-09-01 14:19:49,513 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-09-01 14:19:49,653 INFO L277 CfgBuilder]: Performing block encoding [2023-09-01 14:19:49,682 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-09-01 14:19:49,682 INFO L302 CfgBuilder]: Removed 2 assume(true) statements. [2023-09-01 14:19:49,684 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 01.09 02:19:49 BoogieIcfgContainer [2023-09-01 14:19:49,684 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-09-01 14:19:49,685 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-09-01 14:19:49,685 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2023-09-01 14:19:49,687 INFO L275 PluginConnector]: TraceAbstraction initialized [2023-09-01 14:19:49,687 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 01.09 02:19:49" (1/3) ... [2023-09-01 14:19:49,688 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@27dc2e0d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 01.09 02:19:49, skipping insertion in model container [2023-09-01 14:19:49,688 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 02:19:49" (2/3) ... [2023-09-01 14:19:49,688 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@27dc2e0d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 01.09 02:19:49, skipping insertion in model container [2023-09-01 14:19:49,688 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 01.09 02:19:49" (3/3) ... [2023-09-01 14:19:49,689 INFO L112 eAbstractionObserver]: Analyzing ICFG popl20-nonblocking-cntr.wvr.c [2023-09-01 14:19:49,693 WARN L145 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2023-09-01 14:19:49,699 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-09-01 14:19:49,699 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-09-01 14:19:49,699 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-09-01 14:19:49,745 INFO L144 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2023-09-01 14:19:49,766 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 77 places, 76 transitions, 168 flow [2023-09-01 14:19:49,801 INFO L130 PetriNetUnfolder]: 6/74 cut-off events. [2023-09-01 14:19:49,801 INFO L131 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2023-09-01 14:19:49,804 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. [2023-09-01 14:19:49,805 INFO L82 GeneralOperation]: Start removeDead. Operand has 77 places, 76 transitions, 168 flow [2023-09-01 14:19:49,807 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 67 places, 66 transitions, 144 flow [2023-09-01 14:19:49,810 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-09-01 14:19:49,821 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 67 places, 66 transitions, 144 flow [2023-09-01 14:19:49,823 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 67 places, 66 transitions, 144 flow [2023-09-01 14:19:49,823 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 67 places, 66 transitions, 144 flow [2023-09-01 14:19:49,842 INFO L130 PetriNetUnfolder]: 6/66 cut-off events. [2023-09-01 14:19:49,846 INFO L131 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2023-09-01 14:19:49,847 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. [2023-09-01 14:19:49,847 INFO L119 LiptonReduction]: Number of co-enabled transitions 404 [2023-09-01 14:19:51,490 INFO L134 LiptonReduction]: Checked pairs total: 413 [2023-09-01 14:19:51,491 INFO L136 LiptonReduction]: Total number of compositions: 61 [2023-09-01 14:19:51,500 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-09-01 14:19:51,504 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;@b679858, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-09-01 14:19:51,504 INFO L358 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2023-09-01 14:19:51,508 INFO L130 PetriNetUnfolder]: 2/14 cut-off events. [2023-09-01 14:19:51,508 INFO L131 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2023-09-01 14:19:51,509 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 14:19:51,509 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 14:19:51,509 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-09-01 14:19:51,512 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 14:19:51,512 INFO L85 PathProgramCache]: Analyzing trace with hash 1270362665, now seen corresponding path program 1 times [2023-09-01 14:19:51,518 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 14:19:51,518 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [666946380] [2023-09-01 14:19:51,518 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 14:19:51,519 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 14:19:51,598 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 14:19:51,757 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 14:19:51,758 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 14:19:51,758 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [666946380] [2023-09-01 14:19:51,759 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [666946380] provided 1 perfect and 0 imperfect interpolant sequences [2023-09-01 14:19:51,759 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-09-01 14:19:51,759 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-09-01 14:19:51,760 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [778291470] [2023-09-01 14:19:51,760 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-09-01 14:19:51,766 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-09-01 14:19:51,769 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 14:19:51,786 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-09-01 14:19:51,787 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-09-01 14:19:51,805 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 61 out of 137 [2023-09-01 14:19:51,809 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) [2023-09-01 14:19:51,809 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 14:19:51,810 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 61 of 137 [2023-09-01 14:19:51,810 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 14:19:51,861 INFO L130 PetriNetUnfolder]: 59/100 cut-off events. [2023-09-01 14:19:51,861 INFO L131 PetriNetUnfolder]: For 12/12 co-relation queries the response was YES. [2023-09-01 14:19:51,862 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. [2023-09-01 14:19:51,864 INFO L137 encePairwiseOnDemand]: 133/137 looper letters, 17 selfloop transitions, 3 changer transitions 0/21 dead transitions. [2023-09-01 14:19:51,864 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 23 places, 21 transitions, 97 flow [2023-09-01 14:19:51,866 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-09-01 14:19:51,867 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-09-01 14:19:51,876 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 265 transitions. [2023-09-01 14:19:51,880 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4835766423357664 [2023-09-01 14:19:51,881 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 265 transitions. [2023-09-01 14:19:51,881 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 265 transitions. [2023-09-01 14:19:51,884 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 14:19:51,885 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 265 transitions. [2023-09-01 14:19:51,887 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) [2023-09-01 14:19:51,890 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) [2023-09-01 14:19:51,890 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) [2023-09-01 14:19:51,891 INFO L175 Difference]: Start difference. First operand has 20 places, 15 transitions, 42 flow. Second operand 4 states and 265 transitions. [2023-09-01 14:19:51,892 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 23 places, 21 transitions, 97 flow [2023-09-01 14:19:51,893 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 19 places, 21 transitions, 87 flow, removed 0 selfloop flow, removed 4 redundant places. [2023-09-01 14:19:51,895 INFO L231 Difference]: Finished difference. Result has 20 places, 16 transitions, 48 flow [2023-09-01 14:19:51,896 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} [2023-09-01 14:19:51,901 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 0 predicate places. [2023-09-01 14:19:51,901 INFO L495 AbstractCegarLoop]: Abstraction has has 20 places, 16 transitions, 48 flow [2023-09-01 14:19:51,901 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) [2023-09-01 14:19:51,901 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 14:19:51,902 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 14:19:51,903 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-09-01 14:19:51,905 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-09-01 14:19:51,906 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 14:19:51,906 INFO L85 PathProgramCache]: Analyzing trace with hash 33938299, now seen corresponding path program 1 times [2023-09-01 14:19:51,906 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 14:19:51,906 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [790310802] [2023-09-01 14:19:51,907 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 14:19:51,907 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 14:19:51,931 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 14:19:52,001 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 14:19:52,001 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 14:19:52,001 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [790310802] [2023-09-01 14:19:52,001 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [790310802] provided 1 perfect and 0 imperfect interpolant sequences [2023-09-01 14:19:52,002 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-09-01 14:19:52,002 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-09-01 14:19:52,002 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [936794717] [2023-09-01 14:19:52,002 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-09-01 14:19:52,003 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-09-01 14:19:52,003 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 14:19:52,003 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-09-01 14:19:52,004 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-09-01 14:19:52,023 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 58 out of 137 [2023-09-01 14:19:52,023 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) [2023-09-01 14:19:52,023 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 14:19:52,024 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 58 of 137 [2023-09-01 14:19:52,024 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 14:19:52,109 INFO L130 PetriNetUnfolder]: 86/161 cut-off events. [2023-09-01 14:19:52,110 INFO L131 PetriNetUnfolder]: For 59/59 co-relation queries the response was YES. [2023-09-01 14:19:52,110 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. [2023-09-01 14:19:52,111 INFO L137 encePairwiseOnDemand]: 132/137 looper letters, 30 selfloop transitions, 3 changer transitions 6/39 dead transitions. [2023-09-01 14:19:52,112 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 24 places, 39 transitions, 197 flow [2023-09-01 14:19:52,112 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-09-01 14:19:52,112 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-09-01 14:19:52,113 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 327 transitions. [2023-09-01 14:19:52,114 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.47737226277372263 [2023-09-01 14:19:52,114 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 327 transitions. [2023-09-01 14:19:52,114 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 327 transitions. [2023-09-01 14:19:52,115 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 14:19:52,115 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 327 transitions. [2023-09-01 14:19:52,116 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) [2023-09-01 14:19:52,119 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) [2023-09-01 14:19:52,119 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) [2023-09-01 14:19:52,119 INFO L175 Difference]: Start difference. First operand has 20 places, 16 transitions, 48 flow. Second operand 5 states and 327 transitions. [2023-09-01 14:19:52,120 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 24 places, 39 transitions, 197 flow [2023-09-01 14:19:52,121 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 22 places, 39 transitions, 183 flow, removed 3 selfloop flow, removed 2 redundant places. [2023-09-01 14:19:52,121 INFO L231 Difference]: Finished difference. Result has 25 places, 18 transitions, 64 flow [2023-09-01 14:19:52,122 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} [2023-09-01 14:19:52,122 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 5 predicate places. [2023-09-01 14:19:52,122 INFO L495 AbstractCegarLoop]: Abstraction has has 25 places, 18 transitions, 64 flow [2023-09-01 14:19:52,123 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) [2023-09-01 14:19:52,123 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 14:19:52,123 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 14:19:52,123 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-09-01 14:19:52,123 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-09-01 14:19:52,124 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 14:19:52,124 INFO L85 PathProgramCache]: Analyzing trace with hash -1659358149, now seen corresponding path program 2 times [2023-09-01 14:19:52,124 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 14:19:52,124 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1676630240] [2023-09-01 14:19:52,124 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 14:19:52,124 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 14:19:52,140 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 14:19:52,215 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 14:19:52,215 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 14:19:52,215 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1676630240] [2023-09-01 14:19:52,215 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1676630240] provided 0 perfect and 1 imperfect interpolant sequences [2023-09-01 14:19:52,216 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [67796271] [2023-09-01 14:19:52,216 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-09-01 14:19:52,216 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 14:19:52,216 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-09-01 14:19:52,218 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-09-01 14:19:52,226 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-09-01 14:19:52,270 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2023-09-01 14:19:52,270 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-09-01 14:19:52,271 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 7 conjunts are in the unsatisfiable core [2023-09-01 14:19:52,274 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 14:19:52,327 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-09-01 14:19:52,327 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-09-01 14:19:52,327 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [67796271] provided 1 perfect and 0 imperfect interpolant sequences [2023-09-01 14:19:52,328 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-09-01 14:19:52,328 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [3] total 5 [2023-09-01 14:19:52,328 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1177773668] [2023-09-01 14:19:52,328 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-09-01 14:19:52,328 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-09-01 14:19:52,334 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 14:19:52,334 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-09-01 14:19:52,334 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2023-09-01 14:19:52,346 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 60 out of 137 [2023-09-01 14:19:52,347 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) [2023-09-01 14:19:52,347 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 14:19:52,347 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 60 of 137 [2023-09-01 14:19:52,347 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 14:19:52,386 INFO L130 PetriNetUnfolder]: 51/94 cut-off events. [2023-09-01 14:19:52,386 INFO L131 PetriNetUnfolder]: For 52/59 co-relation queries the response was YES. [2023-09-01 14:19:52,387 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. [2023-09-01 14:19:52,387 INFO L137 encePairwiseOnDemand]: 133/137 looper letters, 19 selfloop transitions, 3 changer transitions 0/23 dead transitions. [2023-09-01 14:19:52,387 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 26 places, 23 transitions, 121 flow [2023-09-01 14:19:52,388 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-09-01 14:19:52,388 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-09-01 14:19:52,388 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 261 transitions. [2023-09-01 14:19:52,389 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4762773722627737 [2023-09-01 14:19:52,389 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 261 transitions. [2023-09-01 14:19:52,389 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 261 transitions. [2023-09-01 14:19:52,389 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 14:19:52,389 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 261 transitions. [2023-09-01 14:19:52,390 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) [2023-09-01 14:19:52,391 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) [2023-09-01 14:19:52,391 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) [2023-09-01 14:19:52,391 INFO L175 Difference]: Start difference. First operand has 25 places, 18 transitions, 64 flow. Second operand 4 states and 261 transitions. [2023-09-01 14:19:52,391 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 26 places, 23 transitions, 121 flow [2023-09-01 14:19:52,392 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 23 places, 23 transitions, 111 flow, removed 4 selfloop flow, removed 3 redundant places. [2023-09-01 14:19:52,392 INFO L231 Difference]: Finished difference. Result has 23 places, 17 transitions, 56 flow [2023-09-01 14:19:52,392 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} [2023-09-01 14:19:52,393 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 3 predicate places. [2023-09-01 14:19:52,393 INFO L495 AbstractCegarLoop]: Abstraction has has 23 places, 17 transitions, 56 flow [2023-09-01 14:19:52,393 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) [2023-09-01 14:19:52,393 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 14:19:52,393 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 14:19:52,400 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-09-01 14:19:52,597 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 14:19:52,598 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-09-01 14:19:52,598 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 14:19:52,598 INFO L85 PathProgramCache]: Analyzing trace with hash 479227940, now seen corresponding path program 1 times [2023-09-01 14:19:52,598 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 14:19:52,599 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1473058119] [2023-09-01 14:19:52,599 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 14:19:52,599 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 14:19:52,617 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 14:19:52,715 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-09-01 14:19:52,718 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 14:19:52,718 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1473058119] [2023-09-01 14:19:52,719 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1473058119] provided 0 perfect and 1 imperfect interpolant sequences [2023-09-01 14:19:52,719 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [962997329] [2023-09-01 14:19:52,719 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 14:19:52,719 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 14:19:52,719 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-09-01 14:19:52,720 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-09-01 14:19:52,722 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-09-01 14:19:52,767 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 14:19:52,768 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 10 conjunts are in the unsatisfiable core [2023-09-01 14:19:52,773 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 14:19:52,814 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-09-01 14:19:52,814 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-09-01 14:19:52,933 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 14:19:52,934 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [962997329] provided 1 perfect and 1 imperfect interpolant sequences [2023-09-01 14:19:52,934 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2023-09-01 14:19:52,934 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [2, 2] total 4 [2023-09-01 14:19:52,934 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1765300675] [2023-09-01 14:19:52,934 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-09-01 14:19:52,935 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-09-01 14:19:52,936 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 14:19:52,937 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-09-01 14:19:52,937 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2023-09-01 14:19:52,943 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 64 out of 137 [2023-09-01 14:19:52,943 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) [2023-09-01 14:19:52,943 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 14:19:52,944 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 64 of 137 [2023-09-01 14:19:52,944 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 14:19:52,993 INFO L130 PetriNetUnfolder]: 84/156 cut-off events. [2023-09-01 14:19:52,993 INFO L131 PetriNetUnfolder]: For 28/47 co-relation queries the response was YES. [2023-09-01 14:19:52,993 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. [2023-09-01 14:19:52,994 INFO L137 encePairwiseOnDemand]: 133/137 looper letters, 28 selfloop transitions, 6 changer transitions 4/40 dead transitions. [2023-09-01 14:19:53,003 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 26 places, 40 transitions, 200 flow [2023-09-01 14:19:53,003 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-09-01 14:19:53,004 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-09-01 14:19:53,004 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 291 transitions. [2023-09-01 14:19:53,004 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.531021897810219 [2023-09-01 14:19:53,005 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 291 transitions. [2023-09-01 14:19:53,005 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 291 transitions. [2023-09-01 14:19:53,005 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 14:19:53,005 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 291 transitions. [2023-09-01 14:19:53,006 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 72.75) internal successors, (291), 4 states have internal predecessors, (291), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 14:19:53,006 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) [2023-09-01 14:19:53,007 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) [2023-09-01 14:19:53,007 INFO L175 Difference]: Start difference. First operand has 23 places, 17 transitions, 56 flow. Second operand 4 states and 291 transitions. [2023-09-01 14:19:53,007 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 26 places, 40 transitions, 200 flow [2023-09-01 14:19:53,008 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 23 places, 40 transitions, 194 flow, removed 0 selfloop flow, removed 3 redundant places. [2023-09-01 14:19:53,008 INFO L231 Difference]: Finished difference. Result has 25 places, 21 transitions, 94 flow [2023-09-01 14:19:53,008 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} [2023-09-01 14:19:53,009 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 5 predicate places. [2023-09-01 14:19:53,009 INFO L495 AbstractCegarLoop]: Abstraction has has 25 places, 21 transitions, 94 flow [2023-09-01 14:19:53,009 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) [2023-09-01 14:19:53,009 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 14:19:53,009 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 14:19:53,015 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2023-09-01 14:19:53,215 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3 [2023-09-01 14:19:53,216 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-09-01 14:19:53,216 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 14:19:53,216 INFO L85 PathProgramCache]: Analyzing trace with hash 1994220820, now seen corresponding path program 2 times [2023-09-01 14:19:53,216 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 14:19:53,216 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1778371262] [2023-09-01 14:19:53,216 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 14:19:53,217 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 14:19:53,230 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 14:19:53,264 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-09-01 14:19:53,264 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 14:19:53,264 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1778371262] [2023-09-01 14:19:53,264 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1778371262] provided 0 perfect and 1 imperfect interpolant sequences [2023-09-01 14:19:53,265 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [242430050] [2023-09-01 14:19:53,265 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-09-01 14:19:53,265 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 14:19:53,265 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-09-01 14:19:53,266 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-09-01 14:19:53,271 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-09-01 14:19:53,315 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-09-01 14:19:53,315 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-09-01 14:19:53,316 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 9 conjunts are in the unsatisfiable core [2023-09-01 14:19:53,318 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 14:19:53,361 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-09-01 14:19:53,362 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-09-01 14:19:53,459 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-09-01 14:19:53,460 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [242430050] provided 0 perfect and 2 imperfect interpolant sequences [2023-09-01 14:19:53,460 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-09-01 14:19:53,460 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 4, 4] total 8 [2023-09-01 14:19:53,460 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1863655484] [2023-09-01 14:19:53,460 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-09-01 14:19:53,461 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2023-09-01 14:19:53,461 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 14:19:53,461 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2023-09-01 14:19:53,461 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2023-09-01 14:19:53,496 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 59 out of 137 [2023-09-01 14:19:53,497 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) [2023-09-01 14:19:53,497 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 14:19:53,499 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 59 of 137 [2023-09-01 14:19:53,499 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 14:19:53,572 INFO L130 PetriNetUnfolder]: 132/239 cut-off events. [2023-09-01 14:19:53,572 INFO L131 PetriNetUnfolder]: For 231/243 co-relation queries the response was YES. [2023-09-01 14:19:53,574 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. [2023-09-01 14:19:53,580 INFO L137 encePairwiseOnDemand]: 132/137 looper letters, 30 selfloop transitions, 8 changer transitions 0/39 dead transitions. [2023-09-01 14:19:53,581 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 29 places, 39 transitions, 247 flow [2023-09-01 14:19:53,581 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-09-01 14:19:53,581 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-09-01 14:19:53,582 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 325 transitions. [2023-09-01 14:19:53,582 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4744525547445255 [2023-09-01 14:19:53,582 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 325 transitions. [2023-09-01 14:19:53,582 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 325 transitions. [2023-09-01 14:19:53,582 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 14:19:53,582 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 325 transitions. [2023-09-01 14:19:53,583 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) [2023-09-01 14:19:53,584 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) [2023-09-01 14:19:53,585 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) [2023-09-01 14:19:53,585 INFO L175 Difference]: Start difference. First operand has 25 places, 21 transitions, 94 flow. Second operand 5 states and 325 transitions. [2023-09-01 14:19:53,585 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 29 places, 39 transitions, 247 flow [2023-09-01 14:19:53,587 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 29 places, 39 transitions, 247 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-09-01 14:19:53,588 INFO L231 Difference]: Finished difference. Result has 32 places, 27 transitions, 168 flow [2023-09-01 14:19:53,588 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} [2023-09-01 14:19:53,590 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 12 predicate places. [2023-09-01 14:19:53,590 INFO L495 AbstractCegarLoop]: Abstraction has has 32 places, 27 transitions, 168 flow [2023-09-01 14:19:53,590 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) [2023-09-01 14:19:53,590 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 14:19:53,590 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 14:19:53,604 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2023-09-01 14:19:53,796 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 14:19:53,797 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-09-01 14:19:53,797 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 14:19:53,797 INFO L85 PathProgramCache]: Analyzing trace with hash 157752969, now seen corresponding path program 3 times [2023-09-01 14:19:53,797 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 14:19:53,797 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [329444156] [2023-09-01 14:19:53,797 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 14:19:53,797 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 14:19:53,805 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 14:19:53,873 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 14:19:53,873 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 14:19:53,873 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [329444156] [2023-09-01 14:19:53,873 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [329444156] provided 0 perfect and 1 imperfect interpolant sequences [2023-09-01 14:19:53,874 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [401251000] [2023-09-01 14:19:53,874 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-09-01 14:19:53,875 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 14:19:53,875 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-09-01 14:19:53,876 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-09-01 14:19:53,877 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-09-01 14:19:53,922 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2023-09-01 14:19:53,922 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-09-01 14:19:53,923 INFO L263 TraceCheckSpWp]: Trace formula consists of 122 conjuncts, 9 conjunts are in the unsatisfiable core [2023-09-01 14:19:53,924 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 14:19:53,988 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 14:19:53,988 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-09-01 14:19:54,133 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 14:19:54,133 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [401251000] provided 0 perfect and 2 imperfect interpolant sequences [2023-09-01 14:19:54,133 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-09-01 14:19:54,133 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 16 [2023-09-01 14:19:54,134 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1112735178] [2023-09-01 14:19:54,134 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-09-01 14:19:54,134 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2023-09-01 14:19:54,134 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 14:19:54,135 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2023-09-01 14:19:54,136 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=181, Unknown=0, NotChecked=0, Total=240 [2023-09-01 14:19:54,197 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 55 out of 137 [2023-09-01 14:19:54,198 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) [2023-09-01 14:19:54,198 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 14:19:54,198 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 55 of 137 [2023-09-01 14:19:54,198 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 14:19:54,519 INFO L130 PetriNetUnfolder]: 216/388 cut-off events. [2023-09-01 14:19:54,520 INFO L131 PetriNetUnfolder]: For 595/595 co-relation queries the response was YES. [2023-09-01 14:19:54,520 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. [2023-09-01 14:19:54,522 INFO L137 encePairwiseOnDemand]: 130/137 looper letters, 64 selfloop transitions, 29 changer transitions 10/103 dead transitions. [2023-09-01 14:19:54,522 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 47 places, 103 transitions, 687 flow [2023-09-01 14:19:54,522 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2023-09-01 14:19:54,522 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2023-09-01 14:19:54,524 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 977 transitions. [2023-09-01 14:19:54,524 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44571167883211676 [2023-09-01 14:19:54,525 INFO L72 ComplementDD]: Start complementDD. Operand 16 states and 977 transitions. [2023-09-01 14:19:54,525 INFO L73 IsDeterministic]: Start isDeterministic. Operand 16 states and 977 transitions. [2023-09-01 14:19:54,525 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 14:19:54,525 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 16 states and 977 transitions. [2023-09-01 14:19:54,527 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) [2023-09-01 14:19:54,530 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) [2023-09-01 14:19:54,531 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) [2023-09-01 14:19:54,531 INFO L175 Difference]: Start difference. First operand has 32 places, 27 transitions, 168 flow. Second operand 16 states and 977 transitions. [2023-09-01 14:19:54,531 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 47 places, 103 transitions, 687 flow [2023-09-01 14:19:54,533 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 46 places, 103 transitions, 677 flow, removed 2 selfloop flow, removed 1 redundant places. [2023-09-01 14:19:54,534 INFO L231 Difference]: Finished difference. Result has 52 places, 43 transitions, 380 flow [2023-09-01 14:19:54,535 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} [2023-09-01 14:19:54,536 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 32 predicate places. [2023-09-01 14:19:54,536 INFO L495 AbstractCegarLoop]: Abstraction has has 52 places, 43 transitions, 380 flow [2023-09-01 14:19:54,537 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) [2023-09-01 14:19:54,537 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 14:19:54,537 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 14:19:54,541 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2023-09-01 14:19:54,740 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 14:19:54,741 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-09-01 14:19:54,741 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 14:19:54,741 INFO L85 PathProgramCache]: Analyzing trace with hash -1226601811, now seen corresponding path program 4 times [2023-09-01 14:19:54,741 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 14:19:54,741 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1557193249] [2023-09-01 14:19:54,741 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 14:19:54,742 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 14:19:54,748 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 14:19:54,813 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 14:19:54,814 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 14:19:54,814 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1557193249] [2023-09-01 14:19:54,814 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1557193249] provided 0 perfect and 1 imperfect interpolant sequences [2023-09-01 14:19:54,814 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [79596943] [2023-09-01 14:19:54,814 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-09-01 14:19:54,814 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 14:19:54,815 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-09-01 14:19:54,815 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-09-01 14:19:54,819 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-09-01 14:19:54,852 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-09-01 14:19:54,853 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-09-01 14:19:54,853 INFO L263 TraceCheckSpWp]: Trace formula consists of 55 conjuncts, 6 conjunts are in the unsatisfiable core [2023-09-01 14:19:54,854 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 14:19:54,929 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 14:19:54,930 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-09-01 14:19:54,982 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 14:19:54,982 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [79596943] provided 0 perfect and 2 imperfect interpolant sequences [2023-09-01 14:19:54,982 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-09-01 14:19:54,982 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 15 [2023-09-01 14:19:54,983 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1397932700] [2023-09-01 14:19:54,983 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-09-01 14:19:54,983 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2023-09-01 14:19:54,984 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 14:19:54,985 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2023-09-01 14:19:54,985 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=161, Unknown=0, NotChecked=0, Total=210 [2023-09-01 14:19:55,037 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 55 out of 137 [2023-09-01 14:19:55,037 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) [2023-09-01 14:19:55,038 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 14:19:55,038 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 55 of 137 [2023-09-01 14:19:55,038 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 14:19:55,313 INFO L130 PetriNetUnfolder]: 297/535 cut-off events. [2023-09-01 14:19:55,313 INFO L131 PetriNetUnfolder]: For 2550/2550 co-relation queries the response was YES. [2023-09-01 14:19:55,314 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. [2023-09-01 14:19:55,316 INFO L137 encePairwiseOnDemand]: 130/137 looper letters, 78 selfloop transitions, 40 changer transitions 1/119 dead transitions. [2023-09-01 14:19:55,316 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 68 places, 119 transitions, 1099 flow [2023-09-01 14:19:55,317 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2023-09-01 14:19:55,317 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2023-09-01 14:19:55,318 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 1026 transitions. [2023-09-01 14:19:55,319 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44053241734650067 [2023-09-01 14:19:55,319 INFO L72 ComplementDD]: Start complementDD. Operand 17 states and 1026 transitions. [2023-09-01 14:19:55,319 INFO L73 IsDeterministic]: Start isDeterministic. Operand 17 states and 1026 transitions. [2023-09-01 14:19:55,320 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 14:19:55,320 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 17 states and 1026 transitions. [2023-09-01 14:19:55,321 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) [2023-09-01 14:19:55,324 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) [2023-09-01 14:19:55,324 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) [2023-09-01 14:19:55,324 INFO L175 Difference]: Start difference. First operand has 52 places, 43 transitions, 380 flow. Second operand 17 states and 1026 transitions. [2023-09-01 14:19:55,324 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 68 places, 119 transitions, 1099 flow [2023-09-01 14:19:55,329 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 63 places, 119 transitions, 994 flow, removed 41 selfloop flow, removed 5 redundant places. [2023-09-01 14:19:55,331 INFO L231 Difference]: Finished difference. Result has 70 places, 68 transitions, 683 flow [2023-09-01 14:19:55,331 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} [2023-09-01 14:19:55,331 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 50 predicate places. [2023-09-01 14:19:55,331 INFO L495 AbstractCegarLoop]: Abstraction has has 70 places, 68 transitions, 683 flow [2023-09-01 14:19:55,332 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) [2023-09-01 14:19:55,332 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 14:19:55,332 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 14:19:55,338 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2023-09-01 14:19:55,536 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 14:19:55,537 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-09-01 14:19:55,537 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 14:19:55,537 INFO L85 PathProgramCache]: Analyzing trace with hash -1808193385, now seen corresponding path program 5 times [2023-09-01 14:19:55,537 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 14:19:55,537 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2090155353] [2023-09-01 14:19:55,537 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 14:19:55,537 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 14:19:55,548 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 14:19:55,618 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 14:19:55,618 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 14:19:55,618 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2090155353] [2023-09-01 14:19:55,618 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2090155353] provided 0 perfect and 1 imperfect interpolant sequences [2023-09-01 14:19:55,619 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [133597462] [2023-09-01 14:19:55,619 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-09-01 14:19:55,619 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 14:19:55,619 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-09-01 14:19:55,620 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-09-01 14:19:55,622 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2023-09-01 14:19:55,664 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-09-01 14:19:55,664 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-09-01 14:19:55,665 INFO L263 TraceCheckSpWp]: Trace formula consists of 124 conjuncts, 13 conjunts are in the unsatisfiable core [2023-09-01 14:19:55,665 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 14:19:55,692 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 14:19:55,692 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-09-01 14:19:55,853 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 3 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 14:19:55,853 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [133597462] provided 0 perfect and 2 imperfect interpolant sequences [2023-09-01 14:19:55,853 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-09-01 14:19:55,854 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 5] total 7 [2023-09-01 14:19:55,854 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1980072559] [2023-09-01 14:19:55,854 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-09-01 14:19:55,854 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2023-09-01 14:19:55,854 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 14:19:55,855 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2023-09-01 14:19:55,855 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=47, Unknown=0, NotChecked=0, Total=72 [2023-09-01 14:19:55,862 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 64 out of 137 [2023-09-01 14:19:55,862 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) [2023-09-01 14:19:55,863 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 14:19:55,863 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 64 of 137 [2023-09-01 14:19:55,863 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 14:19:55,988 INFO L130 PetriNetUnfolder]: 395/719 cut-off events. [2023-09-01 14:19:55,988 INFO L131 PetriNetUnfolder]: For 5748/5772 co-relation queries the response was YES. [2023-09-01 14:19:55,990 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. [2023-09-01 14:19:55,992 INFO L137 encePairwiseOnDemand]: 133/137 looper letters, 71 selfloop transitions, 32 changer transitions 7/117 dead transitions. [2023-09-01 14:19:55,993 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 74 places, 117 transitions, 1313 flow [2023-09-01 14:19:55,993 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-09-01 14:19:55,993 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-09-01 14:19:55,994 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 366 transitions. [2023-09-01 14:19:55,994 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5343065693430656 [2023-09-01 14:19:55,994 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 366 transitions. [2023-09-01 14:19:55,994 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 366 transitions. [2023-09-01 14:19:55,994 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 14:19:55,994 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 366 transitions. [2023-09-01 14:19:55,995 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) [2023-09-01 14:19:55,996 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) [2023-09-01 14:19:55,996 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) [2023-09-01 14:19:55,996 INFO L175 Difference]: Start difference. First operand has 70 places, 68 transitions, 683 flow. Second operand 5 states and 366 transitions. [2023-09-01 14:19:55,996 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 74 places, 117 transitions, 1313 flow [2023-09-01 14:19:56,005 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 71 places, 117 transitions, 1160 flow, removed 72 selfloop flow, removed 3 redundant places. [2023-09-01 14:19:56,007 INFO L231 Difference]: Finished difference. Result has 74 places, 86 transitions, 908 flow [2023-09-01 14:19:56,007 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} [2023-09-01 14:19:56,007 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 54 predicate places. [2023-09-01 14:19:56,007 INFO L495 AbstractCegarLoop]: Abstraction has has 74 places, 86 transitions, 908 flow [2023-09-01 14:19:56,008 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) [2023-09-01 14:19:56,008 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 14:19:56,008 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 14:19:56,012 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2023-09-01 14:19:56,214 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 14:19:56,215 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-09-01 14:19:56,215 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 14:19:56,215 INFO L85 PathProgramCache]: Analyzing trace with hash -2130618993, now seen corresponding path program 6 times [2023-09-01 14:19:56,215 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 14:19:56,215 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1099348263] [2023-09-01 14:19:56,215 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 14:19:56,216 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 14:19:56,222 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 14:19:56,272 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 14:19:56,273 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 14:19:56,273 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1099348263] [2023-09-01 14:19:56,273 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1099348263] provided 0 perfect and 1 imperfect interpolant sequences [2023-09-01 14:19:56,273 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [487962038] [2023-09-01 14:19:56,273 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-09-01 14:19:56,273 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 14:19:56,273 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-09-01 14:19:56,274 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-09-01 14:19:56,276 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2023-09-01 14:19:56,319 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2023-09-01 14:19:56,320 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-09-01 14:19:56,320 INFO L263 TraceCheckSpWp]: Trace formula consists of 122 conjuncts, 8 conjunts are in the unsatisfiable core [2023-09-01 14:19:56,321 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 14:19:56,374 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 14:19:56,375 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-09-01 14:19:56,461 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 14:19:56,461 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [487962038] provided 0 perfect and 2 imperfect interpolant sequences [2023-09-01 14:19:56,461 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-09-01 14:19:56,462 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 16 [2023-09-01 14:19:56,463 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1851360016] [2023-09-01 14:19:56,463 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-09-01 14:19:56,464 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2023-09-01 14:19:56,464 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 14:19:56,464 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2023-09-01 14:19:56,464 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=174, Unknown=0, NotChecked=0, Total=240 [2023-09-01 14:19:56,505 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 55 out of 137 [2023-09-01 14:19:56,506 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) [2023-09-01 14:19:56,506 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 14:19:56,507 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 55 of 137 [2023-09-01 14:19:56,507 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 14:19:57,007 INFO L130 PetriNetUnfolder]: 687/1287 cut-off events. [2023-09-01 14:19:57,007 INFO L131 PetriNetUnfolder]: For 13096/13096 co-relation queries the response was YES. [2023-09-01 14:19:57,009 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. [2023-09-01 14:19:57,014 INFO L137 encePairwiseOnDemand]: 129/137 looper letters, 106 selfloop transitions, 137 changer transitions 16/259 dead transitions. [2023-09-01 14:19:57,015 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 98 places, 259 transitions, 3265 flow [2023-09-01 14:19:57,015 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2023-09-01 14:19:57,015 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 25 states. [2023-09-01 14:19:57,017 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 1500 transitions. [2023-09-01 14:19:57,018 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43795620437956206 [2023-09-01 14:19:57,018 INFO L72 ComplementDD]: Start complementDD. Operand 25 states and 1500 transitions. [2023-09-01 14:19:57,018 INFO L73 IsDeterministic]: Start isDeterministic. Operand 25 states and 1500 transitions. [2023-09-01 14:19:57,019 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 14:19:57,019 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 25 states and 1500 transitions. [2023-09-01 14:19:57,021 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) [2023-09-01 14:19:57,025 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) [2023-09-01 14:19:57,025 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) [2023-09-01 14:19:57,026 INFO L175 Difference]: Start difference. First operand has 74 places, 86 transitions, 908 flow. Second operand 25 states and 1500 transitions. [2023-09-01 14:19:57,026 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 98 places, 259 transitions, 3265 flow [2023-09-01 14:19:57,064 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 97 places, 259 transitions, 3233 flow, removed 12 selfloop flow, removed 1 redundant places. [2023-09-01 14:19:57,067 INFO L231 Difference]: Finished difference. Result has 108 places, 171 transitions, 2489 flow [2023-09-01 14:19:57,067 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} [2023-09-01 14:19:57,068 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 88 predicate places. [2023-09-01 14:19:57,068 INFO L495 AbstractCegarLoop]: Abstraction has has 108 places, 171 transitions, 2489 flow [2023-09-01 14:19:57,068 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) [2023-09-01 14:19:57,068 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 14:19:57,068 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 14:19:57,075 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2023-09-01 14:19:57,273 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 14:19:57,274 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-09-01 14:19:57,274 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 14:19:57,274 INFO L85 PathProgramCache]: Analyzing trace with hash 1283699093, now seen corresponding path program 7 times [2023-09-01 14:19:57,274 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 14:19:57,274 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [962653624] [2023-09-01 14:19:57,275 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 14:19:57,275 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 14:19:57,281 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 14:19:57,337 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 14:19:57,337 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 14:19:57,337 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [962653624] [2023-09-01 14:19:57,338 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [962653624] provided 0 perfect and 1 imperfect interpolant sequences [2023-09-01 14:19:57,338 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [619596799] [2023-09-01 14:19:57,338 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-09-01 14:19:57,338 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 14:19:57,338 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-09-01 14:19:57,339 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-09-01 14:19:57,341 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2023-09-01 14:19:57,383 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 14:19:57,384 INFO L263 TraceCheckSpWp]: Trace formula consists of 122 conjuncts, 8 conjunts are in the unsatisfiable core [2023-09-01 14:19:57,385 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 14:19:57,436 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 14:19:57,437 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-09-01 14:19:57,511 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 14:19:57,512 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [619596799] provided 0 perfect and 2 imperfect interpolant sequences [2023-09-01 14:19:57,512 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-09-01 14:19:57,512 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 16 [2023-09-01 14:19:57,512 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [26550879] [2023-09-01 14:19:57,512 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-09-01 14:19:57,513 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2023-09-01 14:19:57,513 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 14:19:57,513 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2023-09-01 14:19:57,513 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=176, Unknown=0, NotChecked=0, Total=240 [2023-09-01 14:19:57,566 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 55 out of 137 [2023-09-01 14:19:57,567 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) [2023-09-01 14:19:57,567 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 14:19:57,567 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 55 of 137 [2023-09-01 14:19:57,568 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 14:19:58,049 INFO L130 PetriNetUnfolder]: 599/1177 cut-off events. [2023-09-01 14:19:58,049 INFO L131 PetriNetUnfolder]: For 25200/25200 co-relation queries the response was YES. [2023-09-01 14:19:58,052 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. [2023-09-01 14:19:58,058 INFO L137 encePairwiseOnDemand]: 129/137 looper letters, 101 selfloop transitions, 130 changer transitions 10/241 dead transitions. [2023-09-01 14:19:58,058 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 127 places, 241 transitions, 3509 flow [2023-09-01 14:19:58,058 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2023-09-01 14:19:58,058 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2023-09-01 14:19:58,060 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 1328 transitions. [2023-09-01 14:19:58,061 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44061048440610484 [2023-09-01 14:19:58,061 INFO L72 ComplementDD]: Start complementDD. Operand 22 states and 1328 transitions. [2023-09-01 14:19:58,061 INFO L73 IsDeterministic]: Start isDeterministic. Operand 22 states and 1328 transitions. [2023-09-01 14:19:58,061 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 14:19:58,062 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 22 states and 1328 transitions. [2023-09-01 14:19:58,064 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) [2023-09-01 14:19:58,066 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) [2023-09-01 14:19:58,067 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) [2023-09-01 14:19:58,067 INFO L175 Difference]: Start difference. First operand has 108 places, 171 transitions, 2489 flow. Second operand 22 states and 1328 transitions. [2023-09-01 14:19:58,067 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 127 places, 241 transitions, 3509 flow [2023-09-01 14:19:58,129 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 122 places, 241 transitions, 3109 flow, removed 194 selfloop flow, removed 5 redundant places. [2023-09-01 14:19:58,132 INFO L231 Difference]: Finished difference. Result has 126 places, 168 transitions, 2457 flow [2023-09-01 14:19:58,132 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} [2023-09-01 14:19:58,133 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 106 predicate places. [2023-09-01 14:19:58,133 INFO L495 AbstractCegarLoop]: Abstraction has has 126 places, 168 transitions, 2457 flow [2023-09-01 14:19:58,133 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) [2023-09-01 14:19:58,133 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 14:19:58,134 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 14:19:58,140 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2023-09-01 14:19:58,339 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2023-09-01 14:19:58,340 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-09-01 14:19:58,340 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 14:19:58,340 INFO L85 PathProgramCache]: Analyzing trace with hash 465738203, now seen corresponding path program 8 times [2023-09-01 14:19:58,340 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 14:19:58,340 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [763098637] [2023-09-01 14:19:58,340 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 14:19:58,340 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 14:19:58,355 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 14:19:58,451 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 14:19:58,451 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 14:19:58,451 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [763098637] [2023-09-01 14:19:58,452 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [763098637] provided 0 perfect and 1 imperfect interpolant sequences [2023-09-01 14:19:58,452 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [765842063] [2023-09-01 14:19:58,452 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-09-01 14:19:58,452 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 14:19:58,452 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-09-01 14:19:58,453 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-09-01 14:19:58,455 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2023-09-01 14:19:58,499 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-09-01 14:19:58,499 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-09-01 14:19:58,499 INFO L263 TraceCheckSpWp]: Trace formula consists of 122 conjuncts, 9 conjunts are in the unsatisfiable core [2023-09-01 14:19:58,501 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 14:19:58,562 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 14:19:58,562 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-09-01 14:19:58,637 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 14:19:58,637 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [765842063] provided 0 perfect and 2 imperfect interpolant sequences [2023-09-01 14:19:58,637 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-09-01 14:19:58,637 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 18 [2023-09-01 14:19:58,637 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [818298053] [2023-09-01 14:19:58,638 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-09-01 14:19:58,638 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2023-09-01 14:19:58,638 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 14:19:58,638 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2023-09-01 14:19:58,639 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=226, Unknown=0, NotChecked=0, Total=306 [2023-09-01 14:19:58,701 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 55 out of 137 [2023-09-01 14:19:58,702 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) [2023-09-01 14:19:58,702 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 14:19:58,702 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 55 of 137 [2023-09-01 14:19:58,702 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 14:19:59,142 INFO L130 PetriNetUnfolder]: 764/1554 cut-off events. [2023-09-01 14:19:59,142 INFO L131 PetriNetUnfolder]: For 41948/41948 co-relation queries the response was YES. [2023-09-01 14:19:59,146 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. [2023-09-01 14:19:59,152 INFO L137 encePairwiseOnDemand]: 130/137 looper letters, 189 selfloop transitions, 87 changer transitions 8/284 dead transitions. [2023-09-01 14:19:59,153 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 144 places, 284 transitions, 4327 flow [2023-09-01 14:19:59,153 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2023-09-01 14:19:59,153 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2023-09-01 14:19:59,155 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 1215 transitions. [2023-09-01 14:19:59,155 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44343065693430656 [2023-09-01 14:19:59,155 INFO L72 ComplementDD]: Start complementDD. Operand 20 states and 1215 transitions. [2023-09-01 14:19:59,155 INFO L73 IsDeterministic]: Start isDeterministic. Operand 20 states and 1215 transitions. [2023-09-01 14:19:59,156 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 14:19:59,156 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 20 states and 1215 transitions. [2023-09-01 14:19:59,158 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) [2023-09-01 14:19:59,160 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) [2023-09-01 14:19:59,161 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) [2023-09-01 14:19:59,161 INFO L175 Difference]: Start difference. First operand has 126 places, 168 transitions, 2457 flow. Second operand 20 states and 1215 transitions. [2023-09-01 14:19:59,161 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 144 places, 284 transitions, 4327 flow [2023-09-01 14:19:59,215 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 133 places, 284 transitions, 4218 flow, removed 13 selfloop flow, removed 11 redundant places. [2023-09-01 14:19:59,219 INFO L231 Difference]: Finished difference. Result has 140 places, 210 transitions, 3396 flow [2023-09-01 14:19:59,219 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} [2023-09-01 14:19:59,220 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 120 predicate places. [2023-09-01 14:19:59,220 INFO L495 AbstractCegarLoop]: Abstraction has has 140 places, 210 transitions, 3396 flow [2023-09-01 14:19:59,220 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) [2023-09-01 14:19:59,220 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 14:19:59,220 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 14:19:59,226 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2023-09-01 14:19:59,424 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 14:19:59,424 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-09-01 14:19:59,425 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 14:19:59,425 INFO L85 PathProgramCache]: Analyzing trace with hash -2109457573, now seen corresponding path program 9 times [2023-09-01 14:19:59,425 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 14:19:59,425 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1050438793] [2023-09-01 14:19:59,425 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 14:19:59,425 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 14:19:59,432 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 14:19:59,495 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 14:19:59,496 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 14:19:59,496 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1050438793] [2023-09-01 14:19:59,496 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1050438793] provided 0 perfect and 1 imperfect interpolant sequences [2023-09-01 14:19:59,496 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2058413695] [2023-09-01 14:19:59,496 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-09-01 14:19:59,496 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 14:19:59,496 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-09-01 14:19:59,497 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-09-01 14:19:59,516 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2023-09-01 14:19:59,544 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2023-09-01 14:19:59,544 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-09-01 14:19:59,544 INFO L263 TraceCheckSpWp]: Trace formula consists of 122 conjuncts, 8 conjunts are in the unsatisfiable core [2023-09-01 14:19:59,545 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 14:19:59,591 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 14:19:59,592 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-09-01 14:19:59,651 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 14:19:59,652 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2058413695] provided 0 perfect and 2 imperfect interpolant sequences [2023-09-01 14:19:59,652 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-09-01 14:19:59,652 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 6] total 16 [2023-09-01 14:19:59,652 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2087523281] [2023-09-01 14:19:59,652 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-09-01 14:19:59,652 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2023-09-01 14:19:59,652 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 14:19:59,653 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2023-09-01 14:19:59,653 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=174, Unknown=0, NotChecked=0, Total=240 [2023-09-01 14:19:59,706 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 55 out of 137 [2023-09-01 14:19:59,706 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) [2023-09-01 14:19:59,706 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 14:19:59,706 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 55 of 137 [2023-09-01 14:19:59,707 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 14:20:00,145 INFO L130 PetriNetUnfolder]: 756/1536 cut-off events. [2023-09-01 14:20:00,146 INFO L131 PetriNetUnfolder]: For 43638/43638 co-relation queries the response was YES. [2023-09-01 14:20:00,150 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. [2023-09-01 14:20:00,158 INFO L137 encePairwiseOnDemand]: 130/137 looper letters, 153 selfloop transitions, 120 changer transitions 9/282 dead transitions. [2023-09-01 14:20:00,159 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 159 places, 282 transitions, 4856 flow [2023-09-01 14:20:00,159 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2023-09-01 14:20:00,159 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2023-09-01 14:20:00,160 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 1195 transitions. [2023-09-01 14:20:00,161 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43613138686131386 [2023-09-01 14:20:00,161 INFO L72 ComplementDD]: Start complementDD. Operand 20 states and 1195 transitions. [2023-09-01 14:20:00,161 INFO L73 IsDeterministic]: Start isDeterministic. Operand 20 states and 1195 transitions. [2023-09-01 14:20:00,162 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 14:20:00,162 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 20 states and 1195 transitions. [2023-09-01 14:20:00,163 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) [2023-09-01 14:20:00,166 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) [2023-09-01 14:20:00,166 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) [2023-09-01 14:20:00,166 INFO L175 Difference]: Start difference. First operand has 140 places, 210 transitions, 3396 flow. Second operand 20 states and 1195 transitions. [2023-09-01 14:20:00,166 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 159 places, 282 transitions, 4856 flow [2023-09-01 14:20:00,251 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 149 places, 282 transitions, 4488 flow, removed 152 selfloop flow, removed 10 redundant places. [2023-09-01 14:20:00,255 INFO L231 Difference]: Finished difference. Result has 153 places, 224 transitions, 3656 flow [2023-09-01 14:20:00,255 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} [2023-09-01 14:20:00,255 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 133 predicate places. [2023-09-01 14:20:00,256 INFO L495 AbstractCegarLoop]: Abstraction has has 153 places, 224 transitions, 3656 flow [2023-09-01 14:20:00,256 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) [2023-09-01 14:20:00,256 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 14:20:00,256 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 14:20:00,262 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2023-09-01 14:20:00,460 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2023-09-01 14:20:00,460 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-09-01 14:20:00,461 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 14:20:00,461 INFO L85 PathProgramCache]: Analyzing trace with hash 1117413703, now seen corresponding path program 10 times [2023-09-01 14:20:00,461 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 14:20:00,461 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2145273337] [2023-09-01 14:20:00,461 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 14:20:00,461 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 14:20:00,470 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 14:20:00,561 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 14:20:00,561 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 14:20:00,561 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2145273337] [2023-09-01 14:20:00,561 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2145273337] provided 0 perfect and 1 imperfect interpolant sequences [2023-09-01 14:20:00,561 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1979785504] [2023-09-01 14:20:00,561 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-09-01 14:20:00,562 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 14:20:00,562 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-09-01 14:20:00,562 INFO L229 MonitoredProcess]: Starting monitored process 12 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-09-01 14:20:00,564 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2023-09-01 14:20:00,612 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-09-01 14:20:00,612 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-09-01 14:20:00,612 INFO L263 TraceCheckSpWp]: Trace formula consists of 124 conjuncts, 10 conjunts are in the unsatisfiable core [2023-09-01 14:20:00,614 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 14:20:00,636 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-09-01 14:20:00,636 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-09-01 14:20:00,685 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-09-01 14:20:00,685 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1979785504] provided 0 perfect and 2 imperfect interpolant sequences [2023-09-01 14:20:00,685 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-09-01 14:20:00,685 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 4, 4] total 13 [2023-09-01 14:20:00,686 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [434180899] [2023-09-01 14:20:00,686 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-09-01 14:20:00,687 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2023-09-01 14:20:00,687 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 14:20:00,688 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2023-09-01 14:20:00,688 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=137, Unknown=0, NotChecked=0, Total=182 [2023-09-01 14:20:00,742 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 55 out of 137 [2023-09-01 14:20:00,743 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) [2023-09-01 14:20:00,743 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 14:20:00,743 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 55 of 137 [2023-09-01 14:20:00,743 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 14:20:01,260 INFO L130 PetriNetUnfolder]: 803/1611 cut-off events. [2023-09-01 14:20:01,260 INFO L131 PetriNetUnfolder]: For 63986/63986 co-relation queries the response was YES. [2023-09-01 14:20:01,264 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. [2023-09-01 14:20:01,277 INFO L137 encePairwiseOnDemand]: 130/137 looper letters, 167 selfloop transitions, 136 changer transitions 52/355 dead transitions. [2023-09-01 14:20:01,277 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 181 places, 355 transitions, 5940 flow [2023-09-01 14:20:01,278 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2023-09-01 14:20:01,278 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2023-09-01 14:20:01,279 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 1800 transitions. [2023-09-01 14:20:01,280 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43795620437956206 [2023-09-01 14:20:01,280 INFO L72 ComplementDD]: Start complementDD. Operand 30 states and 1800 transitions. [2023-09-01 14:20:01,280 INFO L73 IsDeterministic]: Start isDeterministic. Operand 30 states and 1800 transitions. [2023-09-01 14:20:01,281 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 14:20:01,281 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 30 states and 1800 transitions. [2023-09-01 14:20:01,283 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) [2023-09-01 14:20:01,287 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) [2023-09-01 14:20:01,288 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) [2023-09-01 14:20:01,288 INFO L175 Difference]: Start difference. First operand has 153 places, 224 transitions, 3656 flow. Second operand 30 states and 1800 transitions. [2023-09-01 14:20:01,288 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 181 places, 355 transitions, 5940 flow [2023-09-01 14:20:01,384 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 175 places, 355 transitions, 5667 flow, removed 111 selfloop flow, removed 6 redundant places. [2023-09-01 14:20:01,389 INFO L231 Difference]: Finished difference. Result has 185 places, 250 transitions, 4313 flow [2023-09-01 14:20:01,389 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} [2023-09-01 14:20:01,389 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 165 predicate places. [2023-09-01 14:20:01,390 INFO L495 AbstractCegarLoop]: Abstraction has has 185 places, 250 transitions, 4313 flow [2023-09-01 14:20:01,390 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) [2023-09-01 14:20:01,390 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 14:20:01,390 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 14:20:01,396 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2023-09-01 14:20:01,594 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2023-09-01 14:20:01,594 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-09-01 14:20:01,594 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 14:20:01,594 INFO L85 PathProgramCache]: Analyzing trace with hash 715119095, now seen corresponding path program 11 times [2023-09-01 14:20:01,594 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 14:20:01,594 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1326417028] [2023-09-01 14:20:01,594 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 14:20:01,595 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 14:20:01,602 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 14:20:01,719 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 5 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 14:20:01,719 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 14:20:01,719 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1326417028] [2023-09-01 14:20:01,719 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1326417028] provided 0 perfect and 1 imperfect interpolant sequences [2023-09-01 14:20:01,719 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1750692570] [2023-09-01 14:20:01,719 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-09-01 14:20:01,720 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 14:20:01,720 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-09-01 14:20:01,720 INFO L229 MonitoredProcess]: Starting monitored process 13 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-09-01 14:20:01,722 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2023-09-01 14:20:01,767 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2023-09-01 14:20:01,767 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-09-01 14:20:01,768 INFO L263 TraceCheckSpWp]: Trace formula consists of 134 conjuncts, 13 conjunts are in the unsatisfiable core [2023-09-01 14:20:01,770 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 14:20:01,833 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 7 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 14:20:01,833 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-09-01 14:20:01,987 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 7 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 14:20:01,988 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1750692570] provided 0 perfect and 2 imperfect interpolant sequences [2023-09-01 14:20:01,988 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-09-01 14:20:01,988 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 25 [2023-09-01 14:20:01,988 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1144590793] [2023-09-01 14:20:01,988 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-09-01 14:20:01,988 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2023-09-01 14:20:01,988 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 14:20:01,989 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2023-09-01 14:20:01,989 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=153, Invalid=447, Unknown=0, NotChecked=0, Total=600 [2023-09-01 14:20:02,061 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 55 out of 137 [2023-09-01 14:20:02,062 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) [2023-09-01 14:20:02,063 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 14:20:02,063 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 55 of 137 [2023-09-01 14:20:02,063 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 14:20:03,448 INFO L130 PetriNetUnfolder]: 1235/2432 cut-off events. [2023-09-01 14:20:03,448 INFO L131 PetriNetUnfolder]: For 178071/178071 co-relation queries the response was YES. [2023-09-01 14:20:03,456 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. [2023-09-01 14:20:03,465 INFO L137 encePairwiseOnDemand]: 129/137 looper letters, 208 selfloop transitions, 385 changer transitions 17/610 dead transitions. [2023-09-01 14:20:03,466 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 228 places, 610 transitions, 11431 flow [2023-09-01 14:20:03,466 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2023-09-01 14:20:03,466 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 51 states. [2023-09-01 14:20:03,468 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 3087 transitions. [2023-09-01 14:20:03,469 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44182052382996995 [2023-09-01 14:20:03,469 INFO L72 ComplementDD]: Start complementDD. Operand 51 states and 3087 transitions. [2023-09-01 14:20:03,469 INFO L73 IsDeterministic]: Start isDeterministic. Operand 51 states and 3087 transitions. [2023-09-01 14:20:03,470 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 14:20:03,470 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 51 states and 3087 transitions. [2023-09-01 14:20:03,473 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) [2023-09-01 14:20:03,478 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) [2023-09-01 14:20:03,479 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) [2023-09-01 14:20:03,479 INFO L175 Difference]: Start difference. First operand has 185 places, 250 transitions, 4313 flow. Second operand 51 states and 3087 transitions. [2023-09-01 14:20:03,479 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 228 places, 610 transitions, 11431 flow [2023-09-01 14:20:03,723 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 218 places, 610 transitions, 10906 flow, removed 194 selfloop flow, removed 10 redundant places. [2023-09-01 14:20:03,730 INFO L231 Difference]: Finished difference. Result has 226 places, 442 transitions, 9865 flow [2023-09-01 14:20:03,731 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} [2023-09-01 14:20:03,732 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 206 predicate places. [2023-09-01 14:20:03,732 INFO L495 AbstractCegarLoop]: Abstraction has has 226 places, 442 transitions, 9865 flow [2023-09-01 14:20:03,737 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) [2023-09-01 14:20:03,737 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 14:20:03,737 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 14:20:03,744 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2023-09-01 14:20:03,944 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2023-09-01 14:20:03,945 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-09-01 14:20:03,945 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 14:20:03,945 INFO L85 PathProgramCache]: Analyzing trace with hash 1058407358, now seen corresponding path program 12 times [2023-09-01 14:20:03,945 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 14:20:03,945 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1980138117] [2023-09-01 14:20:03,945 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 14:20:03,945 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 14:20:03,959 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 14:20:04,038 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 14:20:04,038 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 14:20:04,039 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1980138117] [2023-09-01 14:20:04,039 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1980138117] provided 0 perfect and 1 imperfect interpolant sequences [2023-09-01 14:20:04,039 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [973835794] [2023-09-01 14:20:04,039 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-09-01 14:20:04,039 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 14:20:04,039 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-09-01 14:20:04,040 INFO L229 MonitoredProcess]: Starting monitored process 14 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-09-01 14:20:04,042 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2023-09-01 14:20:04,088 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2023-09-01 14:20:04,088 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-09-01 14:20:04,089 INFO L263 TraceCheckSpWp]: Trace formula consists of 131 conjuncts, 16 conjunts are in the unsatisfiable core [2023-09-01 14:20:04,090 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 14:20:04,123 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 14:20:04,123 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-09-01 14:20:04,324 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 6 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 14:20:04,324 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [973835794] provided 0 perfect and 2 imperfect interpolant sequences [2023-09-01 14:20:04,324 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-09-01 14:20:04,324 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 7] total 10 [2023-09-01 14:20:04,324 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2066663809] [2023-09-01 14:20:04,325 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-09-01 14:20:04,325 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-09-01 14:20:04,325 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 14:20:04,325 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-09-01 14:20:04,325 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=90, Unknown=0, NotChecked=0, Total=132 [2023-09-01 14:20:04,335 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 64 out of 137 [2023-09-01 14:20:04,336 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) [2023-09-01 14:20:04,336 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 14:20:04,337 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 64 of 137 [2023-09-01 14:20:04,337 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 14:20:05,175 INFO L130 PetriNetUnfolder]: 1938/3770 cut-off events. [2023-09-01 14:20:05,176 INFO L131 PetriNetUnfolder]: For 282085/282089 co-relation queries the response was YES. [2023-09-01 14:20:05,190 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. [2023-09-01 14:20:05,208 INFO L137 encePairwiseOnDemand]: 133/137 looper letters, 442 selfloop transitions, 257 changer transitions 28/736 dead transitions. [2023-09-01 14:20:05,208 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 230 places, 736 transitions, 17988 flow [2023-09-01 14:20:05,209 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-09-01 14:20:05,209 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-09-01 14:20:05,209 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 441 transitions. [2023-09-01 14:20:05,209 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5364963503649635 [2023-09-01 14:20:05,209 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 441 transitions. [2023-09-01 14:20:05,210 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 441 transitions. [2023-09-01 14:20:05,210 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 14:20:05,210 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 441 transitions. [2023-09-01 14:20:05,210 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) [2023-09-01 14:20:05,211 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) [2023-09-01 14:20:05,211 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) [2023-09-01 14:20:05,211 INFO L175 Difference]: Start difference. First operand has 226 places, 442 transitions, 9865 flow. Second operand 6 states and 441 transitions. [2023-09-01 14:20:05,212 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 230 places, 736 transitions, 17988 flow [2023-09-01 14:20:06,727 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 227 places, 736 transitions, 12584 flow, removed 2614 selfloop flow, removed 3 redundant places. [2023-09-01 14:20:06,735 INFO L231 Difference]: Finished difference. Result has 231 places, 588 transitions, 10758 flow [2023-09-01 14:20:06,736 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} [2023-09-01 14:20:06,736 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 211 predicate places. [2023-09-01 14:20:06,736 INFO L495 AbstractCegarLoop]: Abstraction has has 231 places, 588 transitions, 10758 flow [2023-09-01 14:20:06,737 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) [2023-09-01 14:20:06,737 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 14:20:06,737 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 14:20:06,742 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2023-09-01 14:20:06,941 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2023-09-01 14:20:06,942 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-09-01 14:20:06,942 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 14:20:06,942 INFO L85 PathProgramCache]: Analyzing trace with hash -1587282354, now seen corresponding path program 13 times [2023-09-01 14:20:06,942 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 14:20:06,942 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1106274410] [2023-09-01 14:20:06,943 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 14:20:06,943 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 14:20:06,951 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 14:20:07,044 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 14:20:07,045 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 14:20:07,045 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1106274410] [2023-09-01 14:20:07,045 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1106274410] provided 0 perfect and 1 imperfect interpolant sequences [2023-09-01 14:20:07,045 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1691976581] [2023-09-01 14:20:07,045 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-09-01 14:20:07,045 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 14:20:07,045 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-09-01 14:20:07,049 INFO L229 MonitoredProcess]: Starting monitored process 15 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-09-01 14:20:07,051 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2023-09-01 14:20:07,096 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 14:20:07,097 INFO L263 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 12 conjunts are in the unsatisfiable core [2023-09-01 14:20:07,098 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 14:20:07,172 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 14:20:07,172 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-09-01 14:20:07,332 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 14:20:07,332 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1691976581] provided 0 perfect and 2 imperfect interpolant sequences [2023-09-01 14:20:07,332 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-09-01 14:20:07,332 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 21 [2023-09-01 14:20:07,333 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1447133874] [2023-09-01 14:20:07,333 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-09-01 14:20:07,334 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2023-09-01 14:20:07,334 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 14:20:07,334 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2023-09-01 14:20:07,334 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=94, Invalid=326, Unknown=0, NotChecked=0, Total=420 [2023-09-01 14:20:07,452 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 55 out of 137 [2023-09-01 14:20:07,453 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) [2023-09-01 14:20:07,453 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 14:20:07,453 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 55 of 137 [2023-09-01 14:20:07,453 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 14:20:08,515 INFO L130 PetriNetUnfolder]: 1896/3701 cut-off events. [2023-09-01 14:20:08,516 INFO L131 PetriNetUnfolder]: For 45867/45867 co-relation queries the response was YES. [2023-09-01 14:20:08,529 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. [2023-09-01 14:20:08,541 INFO L137 encePairwiseOnDemand]: 130/137 looper letters, 217 selfloop transitions, 451 changer transitions 20/688 dead transitions. [2023-09-01 14:20:08,541 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 250 places, 688 transitions, 13128 flow [2023-09-01 14:20:08,542 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2023-09-01 14:20:08,542 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2023-09-01 14:20:08,543 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 1457 transitions. [2023-09-01 14:20:08,543 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4431265206812652 [2023-09-01 14:20:08,543 INFO L72 ComplementDD]: Start complementDD. Operand 24 states and 1457 transitions. [2023-09-01 14:20:08,543 INFO L73 IsDeterministic]: Start isDeterministic. Operand 24 states and 1457 transitions. [2023-09-01 14:20:08,544 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 14:20:08,544 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 24 states and 1457 transitions. [2023-09-01 14:20:08,545 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) [2023-09-01 14:20:08,547 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) [2023-09-01 14:20:08,548 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) [2023-09-01 14:20:08,548 INFO L175 Difference]: Start difference. First operand has 231 places, 588 transitions, 10758 flow. Second operand 24 states and 1457 transitions. [2023-09-01 14:20:08,548 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 250 places, 688 transitions, 13128 flow [2023-09-01 14:20:08,798 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 248 places, 688 transitions, 12939 flow, removed 90 selfloop flow, removed 2 redundant places. [2023-09-01 14:20:08,808 INFO L231 Difference]: Finished difference. Result has 248 places, 592 transitions, 11738 flow [2023-09-01 14:20:08,808 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} [2023-09-01 14:20:08,808 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 228 predicate places. [2023-09-01 14:20:08,808 INFO L495 AbstractCegarLoop]: Abstraction has has 248 places, 592 transitions, 11738 flow [2023-09-01 14:20:08,809 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) [2023-09-01 14:20:08,809 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 14:20:08,809 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 14:20:08,813 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2023-09-01 14:20:09,012 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15,15 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 14:20:09,013 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-09-01 14:20:09,013 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 14:20:09,013 INFO L85 PathProgramCache]: Analyzing trace with hash 1502044534, now seen corresponding path program 14 times [2023-09-01 14:20:09,013 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 14:20:09,013 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1758400976] [2023-09-01 14:20:09,013 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 14:20:09,014 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 14:20:09,035 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 14:20:09,132 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 14:20:09,132 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 14:20:09,132 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1758400976] [2023-09-01 14:20:09,133 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1758400976] provided 0 perfect and 1 imperfect interpolant sequences [2023-09-01 14:20:09,133 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1839571512] [2023-09-01 14:20:09,133 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-09-01 14:20:09,133 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 14:20:09,133 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-09-01 14:20:09,134 INFO L229 MonitoredProcess]: Starting monitored process 16 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-09-01 14:20:09,136 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2023-09-01 14:20:09,184 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-09-01 14:20:09,184 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-09-01 14:20:09,185 INFO L263 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 12 conjunts are in the unsatisfiable core [2023-09-01 14:20:09,186 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 14:20:09,269 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 14:20:09,270 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-09-01 14:20:09,433 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 14:20:09,434 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1839571512] provided 0 perfect and 2 imperfect interpolant sequences [2023-09-01 14:20:09,434 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-09-01 14:20:09,434 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 22 [2023-09-01 14:20:09,434 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [800607783] [2023-09-01 14:20:09,434 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-09-01 14:20:09,434 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2023-09-01 14:20:09,434 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 14:20:09,435 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2023-09-01 14:20:09,435 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=105, Invalid=357, Unknown=0, NotChecked=0, Total=462 [2023-09-01 14:20:09,534 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 55 out of 137 [2023-09-01 14:20:09,535 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) [2023-09-01 14:20:09,535 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 14:20:09,535 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 55 of 137 [2023-09-01 14:20:09,535 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 14:20:10,759 INFO L130 PetriNetUnfolder]: 2183/4264 cut-off events. [2023-09-01 14:20:10,759 INFO L131 PetriNetUnfolder]: For 58092/58092 co-relation queries the response was YES. [2023-09-01 14:20:10,774 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. [2023-09-01 14:20:10,788 INFO L137 encePairwiseOnDemand]: 129/137 looper letters, 285 selfloop transitions, 513 changer transitions 4/802 dead transitions. [2023-09-01 14:20:10,789 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 273 places, 802 transitions, 16001 flow [2023-09-01 14:20:10,789 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2023-09-01 14:20:10,789 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2023-09-01 14:20:10,790 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 1575 transitions. [2023-09-01 14:20:10,791 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4421673217293655 [2023-09-01 14:20:10,791 INFO L72 ComplementDD]: Start complementDD. Operand 26 states and 1575 transitions. [2023-09-01 14:20:10,791 INFO L73 IsDeterministic]: Start isDeterministic. Operand 26 states and 1575 transitions. [2023-09-01 14:20:10,792 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 14:20:10,792 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 26 states and 1575 transitions. [2023-09-01 14:20:10,793 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) [2023-09-01 14:20:10,796 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) [2023-09-01 14:20:10,796 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) [2023-09-01 14:20:10,796 INFO L175 Difference]: Start difference. First operand has 248 places, 592 transitions, 11738 flow. Second operand 26 states and 1575 transitions. [2023-09-01 14:20:10,796 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 273 places, 802 transitions, 16001 flow [2023-09-01 14:20:11,123 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 259 places, 802 transitions, 15806 flow, removed 21 selfloop flow, removed 14 redundant places. [2023-09-01 14:20:11,134 INFO L231 Difference]: Finished difference. Result has 270 places, 680 transitions, 14937 flow [2023-09-01 14:20:11,134 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} [2023-09-01 14:20:11,134 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 250 predicate places. [2023-09-01 14:20:11,134 INFO L495 AbstractCegarLoop]: Abstraction has has 270 places, 680 transitions, 14937 flow [2023-09-01 14:20:11,135 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) [2023-09-01 14:20:11,135 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 14:20:11,135 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 14:20:11,141 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2023-09-01 14:20:11,339 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 [2023-09-01 14:20:11,339 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-09-01 14:20:11,339 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 14:20:11,339 INFO L85 PathProgramCache]: Analyzing trace with hash 2011961230, now seen corresponding path program 15 times [2023-09-01 14:20:11,339 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 14:20:11,339 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1083990284] [2023-09-01 14:20:11,339 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 14:20:11,339 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 14:20:11,345 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 14:20:11,441 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 14:20:11,441 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 14:20:11,441 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1083990284] [2023-09-01 14:20:11,441 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1083990284] provided 0 perfect and 1 imperfect interpolant sequences [2023-09-01 14:20:11,441 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1845314046] [2023-09-01 14:20:11,441 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-09-01 14:20:11,442 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 14:20:11,442 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-09-01 14:20:11,443 INFO L229 MonitoredProcess]: Starting monitored process 17 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-09-01 14:20:11,444 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2023-09-01 14:20:11,492 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2023-09-01 14:20:11,492 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-09-01 14:20:11,493 INFO L263 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 12 conjunts are in the unsatisfiable core [2023-09-01 14:20:11,494 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 14:20:11,587 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 14:20:11,587 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-09-01 14:20:11,708 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 14:20:11,709 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1845314046] provided 0 perfect and 2 imperfect interpolant sequences [2023-09-01 14:20:11,709 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-09-01 14:20:11,709 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 22 [2023-09-01 14:20:11,709 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1978935734] [2023-09-01 14:20:11,709 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-09-01 14:20:11,709 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2023-09-01 14:20:11,709 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 14:20:11,710 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2023-09-01 14:20:11,710 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=98, Invalid=364, Unknown=0, NotChecked=0, Total=462 [2023-09-01 14:20:11,817 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 55 out of 137 [2023-09-01 14:20:11,817 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) [2023-09-01 14:20:11,817 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 14:20:11,817 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 55 of 137 [2023-09-01 14:20:11,818 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 14:20:13,393 INFO L130 PetriNetUnfolder]: 2307/4500 cut-off events. [2023-09-01 14:20:13,393 INFO L131 PetriNetUnfolder]: For 80936/80936 co-relation queries the response was YES. [2023-09-01 14:20:13,411 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. [2023-09-01 14:20:13,423 INFO L137 encePairwiseOnDemand]: 129/137 looper letters, 276 selfloop transitions, 604 changer transitions 11/891 dead transitions. [2023-09-01 14:20:13,424 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 301 places, 891 transitions, 19573 flow [2023-09-01 14:20:13,424 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2023-09-01 14:20:13,424 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2023-09-01 14:20:13,425 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 1929 transitions. [2023-09-01 14:20:13,426 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44000912408759124 [2023-09-01 14:20:13,426 INFO L72 ComplementDD]: Start complementDD. Operand 32 states and 1929 transitions. [2023-09-01 14:20:13,426 INFO L73 IsDeterministic]: Start isDeterministic. Operand 32 states and 1929 transitions. [2023-09-01 14:20:13,426 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 14:20:13,426 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 32 states and 1929 transitions. [2023-09-01 14:20:13,428 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) [2023-09-01 14:20:13,431 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) [2023-09-01 14:20:13,431 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) [2023-09-01 14:20:13,431 INFO L175 Difference]: Start difference. First operand has 270 places, 680 transitions, 14937 flow. Second operand 32 states and 1929 transitions. [2023-09-01 14:20:13,431 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 301 places, 891 transitions, 19573 flow [2023-09-01 14:20:13,890 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 293 places, 891 transitions, 19349 flow, removed 84 selfloop flow, removed 8 redundant places. [2023-09-01 14:20:13,955 INFO L231 Difference]: Finished difference. Result has 296 places, 754 transitions, 17585 flow [2023-09-01 14:20:13,955 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} [2023-09-01 14:20:13,955 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 276 predicate places. [2023-09-01 14:20:13,956 INFO L495 AbstractCegarLoop]: Abstraction has has 296 places, 754 transitions, 17585 flow [2023-09-01 14:20:13,956 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) [2023-09-01 14:20:13,956 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 14:20:13,956 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 14:20:13,960 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Ended with exit code 0 [2023-09-01 14:20:14,159 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2023-09-01 14:20:14,160 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-09-01 14:20:14,160 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 14:20:14,160 INFO L85 PathProgramCache]: Analyzing trace with hash 295045338, now seen corresponding path program 16 times [2023-09-01 14:20:14,160 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 14:20:14,160 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1300968662] [2023-09-01 14:20:14,160 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 14:20:14,160 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 14:20:14,166 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 14:20:14,249 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 14:20:14,250 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 14:20:14,250 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1300968662] [2023-09-01 14:20:14,250 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1300968662] provided 0 perfect and 1 imperfect interpolant sequences [2023-09-01 14:20:14,250 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1683039597] [2023-09-01 14:20:14,250 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-09-01 14:20:14,250 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 14:20:14,251 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-09-01 14:20:14,251 INFO L229 MonitoredProcess]: Starting monitored process 18 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-09-01 14:20:14,253 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2023-09-01 14:20:14,293 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-09-01 14:20:14,293 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-09-01 14:20:14,294 INFO L263 TraceCheckSpWp]: Trace formula consists of 62 conjuncts, 9 conjunts are in the unsatisfiable core [2023-09-01 14:20:14,294 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 14:20:14,407 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 6 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 14:20:14,407 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-09-01 14:20:14,473 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 14:20:14,474 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1683039597] provided 0 perfect and 2 imperfect interpolant sequences [2023-09-01 14:20:14,474 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-09-01 14:20:14,474 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 20 [2023-09-01 14:20:14,474 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [776192101] [2023-09-01 14:20:14,474 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-09-01 14:20:14,474 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2023-09-01 14:20:14,474 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 14:20:14,475 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2023-09-01 14:20:14,475 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=91, Invalid=289, Unknown=0, NotChecked=0, Total=380 [2023-09-01 14:20:14,556 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 55 out of 137 [2023-09-01 14:20:14,556 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) [2023-09-01 14:20:14,556 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 14:20:14,556 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 55 of 137 [2023-09-01 14:20:14,557 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 14:20:16,423 INFO L130 PetriNetUnfolder]: 2667/5269 cut-off events. [2023-09-01 14:20:16,423 INFO L131 PetriNetUnfolder]: For 105280/105280 co-relation queries the response was YES. [2023-09-01 14:20:16,443 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. [2023-09-01 14:20:16,457 INFO L137 encePairwiseOnDemand]: 129/137 looper letters, 462 selfloop transitions, 562 changer transitions 17/1041 dead transitions. [2023-09-01 14:20:16,458 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 333 places, 1041 transitions, 23867 flow [2023-09-01 14:20:16,458 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2023-09-01 14:20:16,458 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 38 states. [2023-09-01 14:20:16,459 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 2295 transitions. [2023-09-01 14:20:16,460 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44083749519784865 [2023-09-01 14:20:16,460 INFO L72 ComplementDD]: Start complementDD. Operand 38 states and 2295 transitions. [2023-09-01 14:20:16,460 INFO L73 IsDeterministic]: Start isDeterministic. Operand 38 states and 2295 transitions. [2023-09-01 14:20:16,461 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 14:20:16,461 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 38 states and 2295 transitions. [2023-09-01 14:20:16,463 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) [2023-09-01 14:20:16,466 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) [2023-09-01 14:20:16,466 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) [2023-09-01 14:20:16,466 INFO L175 Difference]: Start difference. First operand has 296 places, 754 transitions, 17585 flow. Second operand 38 states and 2295 transitions. [2023-09-01 14:20:16,466 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 333 places, 1041 transitions, 23867 flow [2023-09-01 14:20:17,119 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 317 places, 1041 transitions, 22444 flow, removed 216 selfloop flow, removed 16 redundant places. [2023-09-01 14:20:17,134 INFO L231 Difference]: Finished difference. Result has 325 places, 861 transitions, 20641 flow [2023-09-01 14:20:17,134 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} [2023-09-01 14:20:17,135 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 305 predicate places. [2023-09-01 14:20:17,135 INFO L495 AbstractCegarLoop]: Abstraction has has 325 places, 861 transitions, 20641 flow [2023-09-01 14:20:17,135 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) [2023-09-01 14:20:17,135 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 14:20:17,135 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 14:20:17,139 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Ended with exit code 0 [2023-09-01 14:20:17,339 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,18 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 14:20:17,339 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-09-01 14:20:17,339 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 14:20:17,339 INFO L85 PathProgramCache]: Analyzing trace with hash 344505820, now seen corresponding path program 17 times [2023-09-01 14:20:17,339 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 14:20:17,339 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [620328395] [2023-09-01 14:20:17,339 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 14:20:17,340 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 14:20:17,350 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 14:20:17,451 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 14:20:17,452 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 14:20:17,452 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [620328395] [2023-09-01 14:20:17,453 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [620328395] provided 0 perfect and 1 imperfect interpolant sequences [2023-09-01 14:20:17,453 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1243587539] [2023-09-01 14:20:17,454 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-09-01 14:20:17,454 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 14:20:17,454 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-09-01 14:20:17,455 INFO L229 MonitoredProcess]: Starting monitored process 19 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-09-01 14:20:17,456 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2023-09-01 14:20:17,505 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2023-09-01 14:20:17,506 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-09-01 14:20:17,506 INFO L263 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 12 conjunts are in the unsatisfiable core [2023-09-01 14:20:17,508 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 14:20:17,596 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 14:20:17,596 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-09-01 14:20:17,756 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 14:20:17,756 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1243587539] provided 0 perfect and 2 imperfect interpolant sequences [2023-09-01 14:20:17,756 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-09-01 14:20:17,756 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 23 [2023-09-01 14:20:17,757 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [672262982] [2023-09-01 14:20:17,757 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-09-01 14:20:17,757 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2023-09-01 14:20:17,757 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 14:20:17,757 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2023-09-01 14:20:17,757 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=114, Invalid=392, Unknown=0, NotChecked=0, Total=506 [2023-09-01 14:20:17,830 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 55 out of 137 [2023-09-01 14:20:17,831 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) [2023-09-01 14:20:17,831 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 14:20:17,831 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 55 of 137 [2023-09-01 14:20:17,831 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 14:20:19,869 INFO L130 PetriNetUnfolder]: 3133/6126 cut-off events. [2023-09-01 14:20:19,870 INFO L131 PetriNetUnfolder]: For 134558/134558 co-relation queries the response was YES. [2023-09-01 14:20:19,897 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. [2023-09-01 14:20:19,917 INFO L137 encePairwiseOnDemand]: 129/137 looper letters, 494 selfloop transitions, 657 changer transitions 15/1166 dead transitions. [2023-09-01 14:20:19,917 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 352 places, 1166 transitions, 28460 flow [2023-09-01 14:20:19,918 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2023-09-01 14:20:19,918 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2023-09-01 14:20:19,919 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 1697 transitions. [2023-09-01 14:20:19,919 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44238790406673617 [2023-09-01 14:20:19,919 INFO L72 ComplementDD]: Start complementDD. Operand 28 states and 1697 transitions. [2023-09-01 14:20:19,919 INFO L73 IsDeterministic]: Start isDeterministic. Operand 28 states and 1697 transitions. [2023-09-01 14:20:19,919 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 14:20:19,919 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 28 states and 1697 transitions. [2023-09-01 14:20:19,921 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) [2023-09-01 14:20:19,923 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) [2023-09-01 14:20:19,923 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) [2023-09-01 14:20:19,924 INFO L175 Difference]: Start difference. First operand has 325 places, 861 transitions, 20641 flow. Second operand 28 states and 1697 transitions. [2023-09-01 14:20:19,924 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 352 places, 1166 transitions, 28460 flow [2023-09-01 14:20:21,051 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 327 places, 1166 transitions, 27809 flow, removed 143 selfloop flow, removed 25 redundant places. [2023-09-01 14:20:21,069 INFO L231 Difference]: Finished difference. Result has 338 places, 1024 transitions, 26136 flow [2023-09-01 14:20:21,070 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} [2023-09-01 14:20:21,070 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 318 predicate places. [2023-09-01 14:20:21,070 INFO L495 AbstractCegarLoop]: Abstraction has has 338 places, 1024 transitions, 26136 flow [2023-09-01 14:20:21,071 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) [2023-09-01 14:20:21,071 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 14:20:21,071 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 14:20:21,084 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Forceful destruction successful, exit code 0 [2023-09-01 14:20:21,275 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,19 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 14:20:21,275 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-09-01 14:20:21,275 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 14:20:21,276 INFO L85 PathProgramCache]: Analyzing trace with hash -764395770, now seen corresponding path program 18 times [2023-09-01 14:20:21,276 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 14:20:21,276 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [425409610] [2023-09-01 14:20:21,276 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 14:20:21,276 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 14:20:21,283 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 14:20:21,380 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 14:20:21,380 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 14:20:21,380 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [425409610] [2023-09-01 14:20:21,380 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [425409610] provided 0 perfect and 1 imperfect interpolant sequences [2023-09-01 14:20:21,380 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1870815818] [2023-09-01 14:20:21,381 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-09-01 14:20:21,381 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 14:20:21,381 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-09-01 14:20:21,382 INFO L229 MonitoredProcess]: Starting monitored process 20 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-09-01 14:20:21,400 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2023-09-01 14:20:21,442 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2023-09-01 14:20:21,442 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-09-01 14:20:21,443 INFO L263 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 10 conjunts are in the unsatisfiable core [2023-09-01 14:20:21,445 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 14:20:21,539 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 14:20:21,539 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-09-01 14:20:21,666 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 14:20:21,666 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1870815818] provided 0 perfect and 2 imperfect interpolant sequences [2023-09-01 14:20:21,666 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-09-01 14:20:21,666 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 23 [2023-09-01 14:20:21,666 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [994863116] [2023-09-01 14:20:21,666 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-09-01 14:20:21,667 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2023-09-01 14:20:21,667 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 14:20:21,668 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2023-09-01 14:20:21,668 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=106, Invalid=400, Unknown=0, NotChecked=0, Total=506 [2023-09-01 14:20:21,763 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 55 out of 137 [2023-09-01 14:20:21,764 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) [2023-09-01 14:20:21,764 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 14:20:21,765 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 55 of 137 [2023-09-01 14:20:21,765 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 14:20:24,591 INFO L130 PetriNetUnfolder]: 3703/7260 cut-off events. [2023-09-01 14:20:24,591 INFO L131 PetriNetUnfolder]: For 189224/189224 co-relation queries the response was YES. [2023-09-01 14:20:24,623 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. [2023-09-01 14:20:24,648 INFO L137 encePairwiseOnDemand]: 129/137 looper letters, 432 selfloop transitions, 909 changer transitions 20/1361 dead transitions. [2023-09-01 14:20:24,648 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 368 places, 1361 transitions, 35664 flow [2023-09-01 14:20:24,648 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2023-09-01 14:20:24,648 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 31 states. [2023-09-01 14:20:24,649 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 1871 transitions. [2023-09-01 14:20:24,650 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44054626795384977 [2023-09-01 14:20:24,650 INFO L72 ComplementDD]: Start complementDD. Operand 31 states and 1871 transitions. [2023-09-01 14:20:24,650 INFO L73 IsDeterministic]: Start isDeterministic. Operand 31 states and 1871 transitions. [2023-09-01 14:20:24,650 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 14:20:24,651 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 31 states and 1871 transitions. [2023-09-01 14:20:24,652 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) [2023-09-01 14:20:24,654 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) [2023-09-01 14:20:24,655 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) [2023-09-01 14:20:24,655 INFO L175 Difference]: Start difference. First operand has 338 places, 1024 transitions, 26136 flow. Second operand 31 states and 1871 transitions. [2023-09-01 14:20:24,655 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 368 places, 1361 transitions, 35664 flow [2023-09-01 14:20:26,098 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 361 places, 1361 transitions, 35350 flow, removed 133 selfloop flow, removed 7 redundant places. [2023-09-01 14:20:26,121 INFO L231 Difference]: Finished difference. Result has 369 places, 1213 transitions, 33651 flow [2023-09-01 14:20:26,122 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} [2023-09-01 14:20:26,122 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 349 predicate places. [2023-09-01 14:20:26,122 INFO L495 AbstractCegarLoop]: Abstraction has has 369 places, 1213 transitions, 33651 flow [2023-09-01 14:20:26,122 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) [2023-09-01 14:20:26,123 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 14:20:26,123 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 14:20:26,128 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Forceful destruction successful, exit code 0 [2023-09-01 14:20:26,326 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,20 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 14:20:26,326 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-09-01 14:20:26,327 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 14:20:26,327 INFO L85 PathProgramCache]: Analyzing trace with hash 1978622190, now seen corresponding path program 19 times [2023-09-01 14:20:26,327 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 14:20:26,327 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [919759725] [2023-09-01 14:20:26,327 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 14:20:26,327 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 14:20:26,333 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 14:20:26,427 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 14:20:26,427 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 14:20:26,428 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [919759725] [2023-09-01 14:20:26,428 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [919759725] provided 0 perfect and 1 imperfect interpolant sequences [2023-09-01 14:20:26,428 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1444172493] [2023-09-01 14:20:26,428 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-09-01 14:20:26,428 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 14:20:26,428 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-09-01 14:20:26,429 INFO L229 MonitoredProcess]: Starting monitored process 21 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-09-01 14:20:26,432 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2023-09-01 14:20:26,481 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 14:20:26,482 INFO L263 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 11 conjunts are in the unsatisfiable core [2023-09-01 14:20:26,482 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 14:20:26,560 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 14:20:26,560 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-09-01 14:20:26,671 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-09-01 14:20:26,671 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1444172493] provided 0 perfect and 2 imperfect interpolant sequences [2023-09-01 14:20:26,671 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-09-01 14:20:26,671 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 8] total 22 [2023-09-01 14:20:26,671 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1319776106] [2023-09-01 14:20:26,671 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-09-01 14:20:26,671 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2023-09-01 14:20:26,672 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 14:20:26,672 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2023-09-01 14:20:26,672 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=121, Invalid=341, Unknown=0, NotChecked=0, Total=462 [2023-09-01 14:20:26,734 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 55 out of 137 [2023-09-01 14:20:26,735 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) [2023-09-01 14:20:26,735 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 14:20:26,735 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 55 of 137 [2023-09-01 14:20:26,735 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 14:20:29,996 INFO L130 PetriNetUnfolder]: 4062/8012 cut-off events. [2023-09-01 14:20:29,996 INFO L131 PetriNetUnfolder]: For 244787/244787 co-relation queries the response was YES. [2023-09-01 14:20:30,046 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. [2023-09-01 14:20:30,083 INFO L137 encePairwiseOnDemand]: 129/137 looper letters, 1169 selfloop transitions, 271 changer transitions 17/1457 dead transitions. [2023-09-01 14:20:30,084 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 396 places, 1457 transitions, 41399 flow [2023-09-01 14:20:30,084 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2023-09-01 14:20:30,084 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2023-09-01 14:20:30,085 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 1696 transitions. [2023-09-01 14:20:30,086 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4421272158498436 [2023-09-01 14:20:30,086 INFO L72 ComplementDD]: Start complementDD. Operand 28 states and 1696 transitions. [2023-09-01 14:20:30,086 INFO L73 IsDeterministic]: Start isDeterministic. Operand 28 states and 1696 transitions. [2023-09-01 14:20:30,086 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 14:20:30,086 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 28 states and 1696 transitions. [2023-09-01 14:20:30,088 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) [2023-09-01 14:20:30,092 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) [2023-09-01 14:20:30,092 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) [2023-09-01 14:20:30,092 INFO L175 Difference]: Start difference. First operand has 369 places, 1213 transitions, 33651 flow. Second operand 28 states and 1696 transitions. [2023-09-01 14:20:30,092 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 396 places, 1457 transitions, 41399 flow [2023-09-01 14:20:32,330 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 383 places, 1457 transitions, 40967 flow, removed 173 selfloop flow, removed 13 redundant places. [2023-09-01 14:20:32,358 INFO L231 Difference]: Finished difference. Result has 393 places, 1327 transitions, 37600 flow [2023-09-01 14:20:32,359 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} [2023-09-01 14:20:32,360 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 373 predicate places. [2023-09-01 14:20:32,360 INFO L495 AbstractCegarLoop]: Abstraction has has 393 places, 1327 transitions, 37600 flow [2023-09-01 14:20:32,360 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) [2023-09-01 14:20:32,360 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 14:20:32,360 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 14:20:32,364 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Ended with exit code 0 [2023-09-01 14:20:32,564 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21 [2023-09-01 14:20:32,564 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-09-01 14:20:32,565 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 14:20:32,565 INFO L85 PathProgramCache]: Analyzing trace with hash 1120342306, now seen corresponding path program 20 times [2023-09-01 14:20:32,565 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 14:20:32,565 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1502041666] [2023-09-01 14:20:32,565 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 14:20:32,565 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 14:20:32,571 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 14:20:32,652 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 14:20:32,652 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 14:20:32,652 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1502041666] [2023-09-01 14:20:32,652 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1502041666] provided 0 perfect and 1 imperfect interpolant sequences [2023-09-01 14:20:32,653 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1984586615] [2023-09-01 14:20:32,653 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-09-01 14:20:32,653 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 14:20:32,653 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-09-01 14:20:32,654 INFO L229 MonitoredProcess]: Starting monitored process 22 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-09-01 14:20:32,656 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2023-09-01 14:20:32,708 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-09-01 14:20:32,708 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-09-01 14:20:32,709 INFO L263 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 11 conjunts are in the unsatisfiable core [2023-09-01 14:20:32,709 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 14:20:32,792 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 14:20:32,792 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-09-01 14:20:32,920 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 14:20:32,920 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1984586615] provided 0 perfect and 2 imperfect interpolant sequences [2023-09-01 14:20:32,920 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-09-01 14:20:32,920 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 8] total 22 [2023-09-01 14:20:32,920 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [122751723] [2023-09-01 14:20:32,920 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-09-01 14:20:32,921 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2023-09-01 14:20:32,921 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 14:20:32,921 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2023-09-01 14:20:32,921 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=121, Invalid=341, Unknown=0, NotChecked=0, Total=462 [2023-09-01 14:20:33,017 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 55 out of 137 [2023-09-01 14:20:33,018 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) [2023-09-01 14:20:33,019 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 14:20:33,019 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 55 of 137 [2023-09-01 14:20:33,019 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 14:20:36,510 INFO L130 PetriNetUnfolder]: 3993/7827 cut-off events. [2023-09-01 14:20:36,511 INFO L131 PetriNetUnfolder]: For 248638/248638 co-relation queries the response was YES. [2023-09-01 14:20:36,712 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. [2023-09-01 14:20:36,741 INFO L137 encePairwiseOnDemand]: 129/137 looper letters, 807 selfloop transitions, 610 changer transitions 15/1432 dead transitions. [2023-09-01 14:20:36,741 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 425 places, 1432 transitions, 41327 flow [2023-09-01 14:20:36,741 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2023-09-01 14:20:36,741 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 33 states. [2023-09-01 14:20:36,742 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 1967 transitions. [2023-09-01 14:20:36,743 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43508073435080735 [2023-09-01 14:20:36,743 INFO L72 ComplementDD]: Start complementDD. Operand 33 states and 1967 transitions. [2023-09-01 14:20:36,743 INFO L73 IsDeterministic]: Start isDeterministic. Operand 33 states and 1967 transitions. [2023-09-01 14:20:36,743 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 14:20:36,743 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 33 states and 1967 transitions. [2023-09-01 14:20:36,745 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) [2023-09-01 14:20:36,747 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) [2023-09-01 14:20:36,747 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) [2023-09-01 14:20:36,747 INFO L175 Difference]: Start difference. First operand has 393 places, 1327 transitions, 37600 flow. Second operand 33 states and 1967 transitions. [2023-09-01 14:20:36,747 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 425 places, 1432 transitions, 41327 flow [2023-09-01 14:20:38,836 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 410 places, 1432 transitions, 40963 flow, removed 111 selfloop flow, removed 15 redundant places. [2023-09-01 14:20:38,863 INFO L231 Difference]: Finished difference. Result has 414 places, 1332 transitions, 38544 flow [2023-09-01 14:20:38,864 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} [2023-09-01 14:20:38,864 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 394 predicate places. [2023-09-01 14:20:38,864 INFO L495 AbstractCegarLoop]: Abstraction has has 414 places, 1332 transitions, 38544 flow [2023-09-01 14:20:38,864 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) [2023-09-01 14:20:38,864 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 14:20:38,864 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 14:20:38,869 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Forceful destruction successful, exit code 0 [2023-09-01 14:20:39,065 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable22 [2023-09-01 14:20:39,065 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-09-01 14:20:39,065 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 14:20:39,065 INFO L85 PathProgramCache]: Analyzing trace with hash -198606537, now seen corresponding path program 21 times [2023-09-01 14:20:39,065 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 14:20:39,065 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1445084721] [2023-09-01 14:20:39,065 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 14:20:39,065 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 14:20:39,071 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 14:20:39,189 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 1 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 14:20:39,190 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 14:20:39,190 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1445084721] [2023-09-01 14:20:39,190 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1445084721] provided 0 perfect and 1 imperfect interpolant sequences [2023-09-01 14:20:39,190 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1813051235] [2023-09-01 14:20:39,190 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-09-01 14:20:39,190 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 14:20:39,191 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-09-01 14:20:39,191 INFO L229 MonitoredProcess]: Starting monitored process 23 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-09-01 14:20:39,194 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2023-09-01 14:20:39,254 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2023-09-01 14:20:39,254 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-09-01 14:20:39,255 INFO L263 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 21 conjunts are in the unsatisfiable core [2023-09-01 14:20:39,256 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 14:20:39,523 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 5 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 14:20:39,523 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-09-01 14:20:39,721 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 1 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 14:20:39,721 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1813051235] provided 0 perfect and 2 imperfect interpolant sequences [2023-09-01 14:20:39,721 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-09-01 14:20:39,721 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 29 [2023-09-01 14:20:39,721 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1804454675] [2023-09-01 14:20:39,721 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-09-01 14:20:39,721 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2023-09-01 14:20:39,722 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 14:20:39,722 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2023-09-01 14:20:39,722 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=185, Invalid=627, Unknown=0, NotChecked=0, Total=812 [2023-09-01 14:20:39,820 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 55 out of 137 [2023-09-01 14:20:39,821 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) [2023-09-01 14:20:39,821 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 14:20:39,821 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 55 of 137 [2023-09-01 14:20:39,821 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 14:20:45,377 INFO L130 PetriNetUnfolder]: 5093/10127 cut-off events. [2023-09-01 14:20:45,377 INFO L131 PetriNetUnfolder]: For 335973/335973 co-relation queries the response was YES. [2023-09-01 14:20:45,443 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. [2023-09-01 14:20:45,485 INFO L137 encePairwiseOnDemand]: 128/137 looper letters, 509 selfloop transitions, 1452 changer transitions 34/1995 dead transitions. [2023-09-01 14:20:45,485 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 475 places, 1995 transitions, 55850 flow [2023-09-01 14:20:45,485 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 63 states. [2023-09-01 14:20:45,486 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 63 states. [2023-09-01 14:20:45,487 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 3805 transitions. [2023-09-01 14:20:45,488 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4408527401228131 [2023-09-01 14:20:45,488 INFO L72 ComplementDD]: Start complementDD. Operand 63 states and 3805 transitions. [2023-09-01 14:20:45,488 INFO L73 IsDeterministic]: Start isDeterministic. Operand 63 states and 3805 transitions. [2023-09-01 14:20:45,490 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 14:20:45,490 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 63 states and 3805 transitions. [2023-09-01 14:20:45,493 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) [2023-09-01 14:20:45,496 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) [2023-09-01 14:20:45,497 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) [2023-09-01 14:20:45,497 INFO L175 Difference]: Start difference. First operand has 414 places, 1332 transitions, 38544 flow. Second operand 63 states and 3805 transitions. [2023-09-01 14:20:45,497 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 475 places, 1995 transitions, 55850 flow [2023-09-01 14:20:48,742 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 459 places, 1995 transitions, 54757 flow, removed 126 selfloop flow, removed 16 redundant places. [2023-09-01 14:20:48,776 INFO L231 Difference]: Finished difference. Result has 472 places, 1687 transitions, 50830 flow [2023-09-01 14:20:48,776 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} [2023-09-01 14:20:48,777 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 452 predicate places. [2023-09-01 14:20:48,777 INFO L495 AbstractCegarLoop]: Abstraction has has 472 places, 1687 transitions, 50830 flow [2023-09-01 14:20:48,777 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) [2023-09-01 14:20:48,777 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 14:20:48,778 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 14:20:48,784 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Forceful destruction successful, exit code 0 [2023-09-01 14:20:48,980 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23,23 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 14:20:48,980 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-09-01 14:20:48,980 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 14:20:48,980 INFO L85 PathProgramCache]: Analyzing trace with hash 175450710, now seen corresponding path program 22 times [2023-09-01 14:20:48,980 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 14:20:48,980 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [955921882] [2023-09-01 14:20:48,980 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 14:20:48,980 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 14:20:48,988 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 14:20:49,092 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 3 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 14:20:49,093 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 14:20:49,093 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [955921882] [2023-09-01 14:20:49,093 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [955921882] provided 0 perfect and 1 imperfect interpolant sequences [2023-09-01 14:20:49,093 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1135163912] [2023-09-01 14:20:49,093 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-09-01 14:20:49,093 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 14:20:49,094 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-09-01 14:20:49,094 INFO L229 MonitoredProcess]: Starting monitored process 24 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-09-01 14:20:49,096 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Waiting until timeout for monitored process [2023-09-01 14:20:49,147 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-09-01 14:20:49,147 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-09-01 14:20:49,147 INFO L263 TraceCheckSpWp]: Trace formula consists of 131 conjuncts, 11 conjunts are in the unsatisfiable core [2023-09-01 14:20:49,149 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 14:20:49,183 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-09-01 14:20:49,184 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-09-01 14:20:49,251 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 7 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-09-01 14:20:49,251 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1135163912] provided 0 perfect and 2 imperfect interpolant sequences [2023-09-01 14:20:49,251 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-09-01 14:20:49,251 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 5, 5] total 16 [2023-09-01 14:20:49,251 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1089781349] [2023-09-01 14:20:49,252 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-09-01 14:20:49,252 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2023-09-01 14:20:49,253 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 14:20:49,253 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2023-09-01 14:20:49,253 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=211, Unknown=0, NotChecked=0, Total=272 [2023-09-01 14:20:49,321 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 55 out of 137 [2023-09-01 14:20:49,322 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) [2023-09-01 14:20:49,322 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 14:20:49,322 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 55 of 137 [2023-09-01 14:20:49,322 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 14:20:54,948 INFO L130 PetriNetUnfolder]: 5147/10159 cut-off events. [2023-09-01 14:20:54,948 INFO L131 PetriNetUnfolder]: For 366730/366730 co-relation queries the response was YES. [2023-09-01 14:20:55,018 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. [2023-09-01 14:20:55,069 INFO L137 encePairwiseOnDemand]: 130/137 looper letters, 966 selfloop transitions, 926 changer transitions 37/1929 dead transitions. [2023-09-01 14:20:55,069 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 510 places, 1929 transitions, 58875 flow [2023-09-01 14:20:55,070 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2023-09-01 14:20:55,070 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 40 states. [2023-09-01 14:20:55,071 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 2408 transitions. [2023-09-01 14:20:55,072 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4394160583941606 [2023-09-01 14:20:55,072 INFO L72 ComplementDD]: Start complementDD. Operand 40 states and 2408 transitions. [2023-09-01 14:20:55,072 INFO L73 IsDeterministic]: Start isDeterministic. Operand 40 states and 2408 transitions. [2023-09-01 14:20:55,073 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 14:20:55,073 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 40 states and 2408 transitions. [2023-09-01 14:20:55,075 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) [2023-09-01 14:20:55,078 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) [2023-09-01 14:20:55,078 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) [2023-09-01 14:20:55,078 INFO L175 Difference]: Start difference. First operand has 472 places, 1687 transitions, 50830 flow. Second operand 40 states and 2408 transitions. [2023-09-01 14:20:55,078 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 510 places, 1929 transitions, 58875 flow [2023-09-01 14:20:58,628 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 492 places, 1929 transitions, 57886 flow, removed 399 selfloop flow, removed 18 redundant places. [2023-09-01 14:20:58,669 INFO L231 Difference]: Finished difference. Result has 506 places, 1780 transitions, 54982 flow [2023-09-01 14:20:58,670 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} [2023-09-01 14:20:58,671 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 486 predicate places. [2023-09-01 14:20:58,671 INFO L495 AbstractCegarLoop]: Abstraction has has 506 places, 1780 transitions, 54982 flow [2023-09-01 14:20:58,671 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) [2023-09-01 14:20:58,671 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 14:20:58,671 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 14:20:58,675 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Forceful destruction successful, exit code 0 [2023-09-01 14:20:58,871 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24,24 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 14:20:58,871 INFO L420 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-09-01 14:20:58,872 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 14:20:58,872 INFO L85 PathProgramCache]: Analyzing trace with hash -844978902, now seen corresponding path program 23 times [2023-09-01 14:20:58,872 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 14:20:58,872 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1835865084] [2023-09-01 14:20:58,872 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 14:20:58,872 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 14:20:58,885 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 14:20:58,984 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 4 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 14:20:58,984 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 14:20:58,985 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1835865084] [2023-09-01 14:20:58,985 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1835865084] provided 0 perfect and 1 imperfect interpolant sequences [2023-09-01 14:20:58,985 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [441832565] [2023-09-01 14:20:58,985 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-09-01 14:20:58,985 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 14:20:58,985 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-09-01 14:20:58,986 INFO L229 MonitoredProcess]: Starting monitored process 25 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-09-01 14:20:58,988 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Waiting until timeout for monitored process [2023-09-01 14:20:59,039 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2023-09-01 14:20:59,039 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-09-01 14:20:59,040 INFO L263 TraceCheckSpWp]: Trace formula consists of 131 conjuncts, 13 conjunts are in the unsatisfiable core [2023-09-01 14:20:59,041 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 14:20:59,135 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 4 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 14:20:59,135 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-09-01 14:20:59,301 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 4 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 14:20:59,301 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [441832565] provided 0 perfect and 2 imperfect interpolant sequences [2023-09-01 14:20:59,301 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-09-01 14:20:59,301 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 22 [2023-09-01 14:20:59,301 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1452766554] [2023-09-01 14:20:59,301 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-09-01 14:20:59,302 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2023-09-01 14:20:59,302 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 14:20:59,302 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2023-09-01 14:20:59,302 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=105, Invalid=401, Unknown=0, NotChecked=0, Total=506 [2023-09-01 14:20:59,394 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 55 out of 137 [2023-09-01 14:20:59,395 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) [2023-09-01 14:20:59,395 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 14:20:59,395 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 55 of 137 [2023-09-01 14:20:59,395 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 14:21:06,130 INFO L130 PetriNetUnfolder]: 5828/11569 cut-off events. [2023-09-01 14:21:06,130 INFO L131 PetriNetUnfolder]: For 464965/464965 co-relation queries the response was YES. [2023-09-01 14:21:06,215 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. [2023-09-01 14:21:06,353 INFO L137 encePairwiseOnDemand]: 130/137 looper letters, 750 selfloop transitions, 1405 changer transitions 35/2190 dead transitions. [2023-09-01 14:21:06,353 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 535 places, 2190 transitions, 69908 flow [2023-09-01 14:21:06,353 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2023-09-01 14:21:06,353 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 35 states. [2023-09-01 14:21:06,354 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 2106 transitions. [2023-09-01 14:21:06,355 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4392075078206465 [2023-09-01 14:21:06,355 INFO L72 ComplementDD]: Start complementDD. Operand 35 states and 2106 transitions. [2023-09-01 14:21:06,355 INFO L73 IsDeterministic]: Start isDeterministic. Operand 35 states and 2106 transitions. [2023-09-01 14:21:06,355 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 14:21:06,355 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 35 states and 2106 transitions. [2023-09-01 14:21:06,357 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) [2023-09-01 14:21:06,359 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) [2023-09-01 14:21:06,359 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) [2023-09-01 14:21:06,359 INFO L175 Difference]: Start difference. First operand has 506 places, 1780 transitions, 54982 flow. Second operand 35 states and 2106 transitions. [2023-09-01 14:21:06,359 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 535 places, 2190 transitions, 69908 flow [2023-09-01 14:21:10,741 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 522 places, 2190 transitions, 67715 flow, removed 249 selfloop flow, removed 13 redundant places. [2023-09-01 14:21:10,783 INFO L231 Difference]: Finished difference. Result has 532 places, 1996 transitions, 65679 flow [2023-09-01 14:21:10,785 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} [2023-09-01 14:21:10,785 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 512 predicate places. [2023-09-01 14:21:10,785 INFO L495 AbstractCegarLoop]: Abstraction has has 532 places, 1996 transitions, 65679 flow [2023-09-01 14:21:10,785 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) [2023-09-01 14:21:10,785 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 14:21:10,786 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 14:21:10,790 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Ended with exit code 0 [2023-09-01 14:21:10,990 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 25 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable25 [2023-09-01 14:21:10,990 INFO L420 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-09-01 14:21:10,990 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 14:21:10,990 INFO L85 PathProgramCache]: Analyzing trace with hash 1262507224, now seen corresponding path program 24 times [2023-09-01 14:21:10,990 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 14:21:10,991 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1630966824] [2023-09-01 14:21:10,991 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 14:21:10,991 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 14:21:11,001 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 14:21:11,099 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 1 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 14:21:11,099 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 14:21:11,099 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1630966824] [2023-09-01 14:21:11,100 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1630966824] provided 0 perfect and 1 imperfect interpolant sequences [2023-09-01 14:21:11,100 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1865381520] [2023-09-01 14:21:11,100 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-09-01 14:21:11,100 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 14:21:11,100 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-09-01 14:21:11,101 INFO L229 MonitoredProcess]: Starting monitored process 26 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-09-01 14:21:11,101 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Waiting until timeout for monitored process [2023-09-01 14:21:11,162 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2023-09-01 14:21:11,162 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-09-01 14:21:11,163 INFO L263 TraceCheckSpWp]: Trace formula consists of 131 conjuncts, 13 conjunts are in the unsatisfiable core [2023-09-01 14:21:11,163 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 14:21:11,271 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 1 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 14:21:11,271 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-09-01 14:21:11,457 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 2 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 14:21:11,457 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1865381520] provided 0 perfect and 2 imperfect interpolant sequences [2023-09-01 14:21:11,457 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-09-01 14:21:11,457 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 23 [2023-09-01 14:21:11,457 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [349992377] [2023-09-01 14:21:11,457 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-09-01 14:21:11,458 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2023-09-01 14:21:11,458 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 14:21:11,458 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2023-09-01 14:21:11,458 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=118, Invalid=434, Unknown=0, NotChecked=0, Total=552 [2023-09-01 14:21:11,569 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 55 out of 137 [2023-09-01 14:21:11,570 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) [2023-09-01 14:21:11,570 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 14:21:11,570 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 55 of 137 [2023-09-01 14:21:11,570 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 14:21:19,302 INFO L130 PetriNetUnfolder]: 6319/12549 cut-off events. [2023-09-01 14:21:19,302 INFO L131 PetriNetUnfolder]: For 547009/547009 co-relation queries the response was YES. [2023-09-01 14:21:19,396 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. [2023-09-01 14:21:19,450 INFO L137 encePairwiseOnDemand]: 130/137 looper letters, 1858 selfloop transitions, 433 changer transitions 18/2309 dead transitions. [2023-09-01 14:21:19,451 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 555 places, 2309 transitions, 78847 flow [2023-09-01 14:21:19,451 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2023-09-01 14:21:19,451 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2023-09-01 14:21:19,452 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 1457 transitions. [2023-09-01 14:21:19,452 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4431265206812652 [2023-09-01 14:21:19,452 INFO L72 ComplementDD]: Start complementDD. Operand 24 states and 1457 transitions. [2023-09-01 14:21:19,452 INFO L73 IsDeterministic]: Start isDeterministic. Operand 24 states and 1457 transitions. [2023-09-01 14:21:19,453 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 14:21:19,453 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 24 states and 1457 transitions. [2023-09-01 14:21:19,454 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) [2023-09-01 14:21:19,455 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) [2023-09-01 14:21:19,456 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) [2023-09-01 14:21:19,456 INFO L175 Difference]: Start difference. First operand has 532 places, 1996 transitions, 65679 flow. Second operand 24 states and 1457 transitions. [2023-09-01 14:21:19,456 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 555 places, 2309 transitions, 78847 flow [2023-09-01 14:21:25,585 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 541 places, 2309 transitions, 77988 flow, removed 348 selfloop flow, removed 14 redundant places. [2023-09-01 14:21:25,634 INFO L231 Difference]: Finished difference. Result has 552 places, 2179 transitions, 73089 flow [2023-09-01 14:21:25,635 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} [2023-09-01 14:21:25,635 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 532 predicate places. [2023-09-01 14:21:25,635 INFO L495 AbstractCegarLoop]: Abstraction has has 552 places, 2179 transitions, 73089 flow [2023-09-01 14:21:25,635 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) [2023-09-01 14:21:25,635 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 14:21:25,635 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 14:21:25,640 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Ended with exit code 0 [2023-09-01 14:21:25,836 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2023-09-01 14:21:25,836 INFO L420 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-09-01 14:21:25,836 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 14:21:25,836 INFO L85 PathProgramCache]: Analyzing trace with hash 1865710427, now seen corresponding path program 25 times [2023-09-01 14:21:25,836 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 14:21:25,836 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [419543067] [2023-09-01 14:21:25,836 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 14:21:25,836 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 14:21:25,843 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 14:21:25,960 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 3 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 14:21:25,961 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 14:21:25,961 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [419543067] [2023-09-01 14:21:25,961 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [419543067] provided 0 perfect and 1 imperfect interpolant sequences [2023-09-01 14:21:25,961 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1815452131] [2023-09-01 14:21:25,961 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-09-01 14:21:25,961 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 14:21:25,961 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-09-01 14:21:25,962 INFO L229 MonitoredProcess]: Starting monitored process 27 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-09-01 14:21:25,965 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Waiting until timeout for monitored process [2023-09-01 14:21:26,024 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 14:21:26,024 INFO L263 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 15 conjunts are in the unsatisfiable core [2023-09-01 14:21:26,025 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 14:21:26,102 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 6 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 14:21:26,102 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-09-01 14:21:26,377 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 6 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 14:21:26,377 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1815452131] provided 0 perfect and 2 imperfect interpolant sequences [2023-09-01 14:21:26,377 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-09-01 14:21:26,377 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 26 [2023-09-01 14:21:26,378 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [158234555] [2023-09-01 14:21:26,378 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-09-01 14:21:26,378 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2023-09-01 14:21:26,378 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 14:21:26,378 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2023-09-01 14:21:26,379 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=138, Invalid=512, Unknown=0, NotChecked=0, Total=650 [2023-09-01 14:21:26,477 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 55 out of 137 [2023-09-01 14:21:26,477 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) [2023-09-01 14:21:26,478 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 14:21:26,478 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 55 of 137 [2023-09-01 14:21:26,478 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 14:21:36,377 INFO L130 PetriNetUnfolder]: 7426/14580 cut-off events. [2023-09-01 14:21:36,377 INFO L131 PetriNetUnfolder]: For 646625/646625 co-relation queries the response was YES. [2023-09-01 14:21:36,491 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. [2023-09-01 14:21:36,558 INFO L137 encePairwiseOnDemand]: 130/137 looper letters, 663 selfloop transitions, 2215 changer transitions 51/2929 dead transitions. [2023-09-01 14:21:36,558 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 585 places, 2929 transitions, 98252 flow [2023-09-01 14:21:36,558 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2023-09-01 14:21:36,558 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2023-09-01 14:21:36,559 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 2071 transitions. [2023-09-01 14:21:36,560 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4446114212108201 [2023-09-01 14:21:36,560 INFO L72 ComplementDD]: Start complementDD. Operand 34 states and 2071 transitions. [2023-09-01 14:21:36,560 INFO L73 IsDeterministic]: Start isDeterministic. Operand 34 states and 2071 transitions. [2023-09-01 14:21:36,560 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 14:21:36,560 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 34 states and 2071 transitions. [2023-09-01 14:21:36,562 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) [2023-09-01 14:21:36,564 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) [2023-09-01 14:21:36,564 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) [2023-09-01 14:21:36,564 INFO L175 Difference]: Start difference. First operand has 552 places, 2179 transitions, 73089 flow. Second operand 34 states and 2071 transitions. [2023-09-01 14:21:36,564 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 585 places, 2929 transitions, 98252 flow [2023-09-01 14:21:45,034 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 575 places, 2929 transitions, 97725 flow, removed 227 selfloop flow, removed 10 redundant places. [2023-09-01 14:21:45,092 INFO L231 Difference]: Finished difference. Result has 583 places, 2543 transitions, 92010 flow [2023-09-01 14:21:45,093 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} [2023-09-01 14:21:45,093 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 563 predicate places. [2023-09-01 14:21:45,093 INFO L495 AbstractCegarLoop]: Abstraction has has 583 places, 2543 transitions, 92010 flow [2023-09-01 14:21:45,094 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) [2023-09-01 14:21:45,094 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 14:21:45,094 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 14:21:45,098 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Forceful destruction successful, exit code 0 [2023-09-01 14:21:45,296 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27 [2023-09-01 14:21:45,297 INFO L420 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-09-01 14:21:45,297 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 14:21:45,297 INFO L85 PathProgramCache]: Analyzing trace with hash -1412434121, now seen corresponding path program 26 times [2023-09-01 14:21:45,297 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 14:21:45,297 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1779090418] [2023-09-01 14:21:45,297 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 14:21:45,297 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 14:21:45,306 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 14:21:45,395 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 14:21:45,395 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 14:21:45,395 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1779090418] [2023-09-01 14:21:45,396 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1779090418] provided 0 perfect and 1 imperfect interpolant sequences [2023-09-01 14:21:45,396 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [399018572] [2023-09-01 14:21:45,396 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-09-01 14:21:45,396 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 14:21:45,396 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-09-01 14:21:45,397 INFO L229 MonitoredProcess]: Starting monitored process 28 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-09-01 14:21:45,399 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Waiting until timeout for monitored process [2023-09-01 14:21:45,463 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-09-01 14:21:45,463 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-09-01 14:21:45,464 INFO L263 TraceCheckSpWp]: Trace formula consists of 138 conjuncts, 19 conjunts are in the unsatisfiable core [2023-09-01 14:21:45,465 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 14:21:45,501 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 14:21:45,501 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-09-01 14:21:45,729 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 10 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 14:21:45,729 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [399018572] provided 0 perfect and 2 imperfect interpolant sequences [2023-09-01 14:21:45,729 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-09-01 14:21:45,729 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 9] total 13 [2023-09-01 14:21:45,729 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1297523085] [2023-09-01 14:21:45,729 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-09-01 14:21:45,730 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2023-09-01 14:21:45,730 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 14:21:45,730 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2023-09-01 14:21:45,730 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=147, Unknown=0, NotChecked=0, Total=210 [2023-09-01 14:21:45,753 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 64 out of 137 [2023-09-01 14:21:45,753 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) [2023-09-01 14:21:45,753 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 14:21:45,753 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 64 of 137 [2023-09-01 14:21:45,754 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 14:22:01,185 INFO L130 PetriNetUnfolder]: 10420/20394 cut-off events. [2023-09-01 14:22:01,185 INFO L131 PetriNetUnfolder]: For 1021786/1021790 co-relation queries the response was YES. [2023-09-01 14:22:01,359 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. [2023-09-01 14:22:01,458 INFO L137 encePairwiseOnDemand]: 133/137 looper letters, 1798 selfloop transitions, 1910 changer transitions 71/3792 dead transitions. [2023-09-01 14:22:01,458 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 589 places, 3792 transitions, 139482 flow [2023-09-01 14:22:01,459 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-09-01 14:22:01,459 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2023-09-01 14:22:01,459 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 516 transitions. [2023-09-01 14:22:01,459 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5380604796663191 [2023-09-01 14:22:01,459 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 516 transitions. [2023-09-01 14:22:01,459 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 516 transitions. [2023-09-01 14:22:01,460 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 14:22:01,460 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 516 transitions. [2023-09-01 14:22:01,460 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) [2023-09-01 14:22:01,461 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) [2023-09-01 14:22:01,461 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) [2023-09-01 14:22:01,461 INFO L175 Difference]: Start difference. First operand has 583 places, 2543 transitions, 92010 flow. Second operand 7 states and 516 transitions. [2023-09-01 14:22:01,461 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 589 places, 3792 transitions, 139482 flow [2023-09-01 14:22:17,709 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 576 places, 3792 transitions, 136869 flow, removed 1218 selfloop flow, removed 13 redundant places. [2023-09-01 14:22:17,788 INFO L231 Difference]: Finished difference. Result has 581 places, 3366 transitions, 129443 flow [2023-09-01 14:22:17,790 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} [2023-09-01 14:22:17,790 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 561 predicate places. [2023-09-01 14:22:17,790 INFO L495 AbstractCegarLoop]: Abstraction has has 581 places, 3366 transitions, 129443 flow [2023-09-01 14:22:17,791 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) [2023-09-01 14:22:17,791 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 14:22:17,791 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 14:22:17,795 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Forceful destruction successful, exit code 0 [2023-09-01 14:22:17,995 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2023-09-01 14:22:17,996 INFO L420 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-09-01 14:22:17,996 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 14:22:17,996 INFO L85 PathProgramCache]: Analyzing trace with hash -1079980299, now seen corresponding path program 27 times [2023-09-01 14:22:17,996 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 14:22:17,997 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1162327511] [2023-09-01 14:22:17,997 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 14:22:17,997 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 14:22:18,003 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 14:22:18,128 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 1 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 14:22:18,129 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 14:22:18,129 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1162327511] [2023-09-01 14:22:18,129 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1162327511] provided 0 perfect and 1 imperfect interpolant sequences [2023-09-01 14:22:18,129 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [727470190] [2023-09-01 14:22:18,129 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-09-01 14:22:18,129 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 14:22:18,129 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-09-01 14:22:18,130 INFO L229 MonitoredProcess]: Starting monitored process 29 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-09-01 14:22:18,132 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Waiting until timeout for monitored process [2023-09-01 14:22:18,194 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2023-09-01 14:22:18,194 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-09-01 14:22:18,195 INFO L263 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 15 conjunts are in the unsatisfiable core [2023-09-01 14:22:18,195 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 14:22:18,331 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 3 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 14:22:18,331 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-09-01 14:22:18,506 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 3 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 14:22:18,507 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [727470190] provided 0 perfect and 2 imperfect interpolant sequences [2023-09-01 14:22:18,507 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-09-01 14:22:18,507 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 27 [2023-09-01 14:22:18,507 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1925155379] [2023-09-01 14:22:18,507 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-09-01 14:22:18,507 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2023-09-01 14:22:18,507 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 14:22:18,510 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2023-09-01 14:22:18,510 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=136, Invalid=566, Unknown=0, NotChecked=0, Total=702 [2023-09-01 14:22:18,632 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 55 out of 137 [2023-09-01 14:22:18,633 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) [2023-09-01 14:22:18,633 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 14:22:18,633 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 55 of 137 [2023-09-01 14:22:18,633 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 14:22:41,450 INFO L130 PetriNetUnfolder]: 11506/22564 cut-off events. [2023-09-01 14:22:41,450 INFO L131 PetriNetUnfolder]: For 1238342/1238342 co-relation queries the response was YES. [2023-09-01 14:22:41,659 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. [2023-09-01 14:22:41,769 INFO L137 encePairwiseOnDemand]: 129/137 looper letters, 613 selfloop transitions, 3375 changer transitions 24/4012 dead transitions. [2023-09-01 14:22:41,769 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 627 places, 4012 transitions, 156394 flow [2023-09-01 14:22:41,769 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2023-09-01 14:22:41,769 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 47 states. [2023-09-01 14:22:41,770 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 2845 transitions. [2023-09-01 14:22:41,771 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44183879484391986 [2023-09-01 14:22:41,771 INFO L72 ComplementDD]: Start complementDD. Operand 47 states and 2845 transitions. [2023-09-01 14:22:41,771 INFO L73 IsDeterministic]: Start isDeterministic. Operand 47 states and 2845 transitions. [2023-09-01 14:22:41,772 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 14:22:41,772 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 47 states and 2845 transitions. [2023-09-01 14:22:41,774 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) [2023-09-01 14:22:41,777 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) [2023-09-01 14:22:41,777 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) [2023-09-01 14:22:41,777 INFO L175 Difference]: Start difference. First operand has 581 places, 3366 transitions, 129443 flow. Second operand 47 states and 2845 transitions. [2023-09-01 14:22:41,777 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 627 places, 4012 transitions, 156394 flow [2023-09-01 14:23:03,736 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 625 places, 4012 transitions, 155030 flow, removed 649 selfloop flow, removed 2 redundant places. [2023-09-01 14:23:03,837 INFO L231 Difference]: Finished difference. Result has 626 places, 3718 transitions, 148508 flow [2023-09-01 14:23:03,839 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} [2023-09-01 14:23:03,839 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 606 predicate places. [2023-09-01 14:23:03,839 INFO L495 AbstractCegarLoop]: Abstraction has has 626 places, 3718 transitions, 148508 flow [2023-09-01 14:23:03,840 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) [2023-09-01 14:23:03,840 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 14:23:03,840 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 14:23:03,846 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Forceful destruction successful, exit code 0 [2023-09-01 14:23:04,040 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,29 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 14:23:04,040 INFO L420 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-09-01 14:23:04,041 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 14:23:04,041 INFO L85 PathProgramCache]: Analyzing trace with hash -570063603, now seen corresponding path program 28 times [2023-09-01 14:23:04,041 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 14:23:04,041 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2109642273] [2023-09-01 14:23:04,041 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 14:23:04,042 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 14:23:04,048 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 14:23:04,167 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 1 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 14:23:04,168 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 14:23:04,168 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2109642273] [2023-09-01 14:23:04,168 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2109642273] provided 0 perfect and 1 imperfect interpolant sequences [2023-09-01 14:23:04,168 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [401991811] [2023-09-01 14:23:04,168 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-09-01 14:23:04,168 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 14:23:04,169 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-09-01 14:23:04,170 INFO L229 MonitoredProcess]: Starting monitored process 30 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-09-01 14:23:04,174 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Waiting until timeout for monitored process [2023-09-01 14:23:04,225 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-09-01 14:23:04,226 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-09-01 14:23:04,226 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 17 conjunts are in the unsatisfiable core [2023-09-01 14:23:04,227 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 14:23:04,384 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 6 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 14:23:04,384 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-09-01 14:23:04,530 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 3 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 14:23:04,531 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [401991811] provided 0 perfect and 2 imperfect interpolant sequences [2023-09-01 14:23:04,531 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-09-01 14:23:04,531 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 26 [2023-09-01 14:23:04,531 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1867680485] [2023-09-01 14:23:04,531 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-09-01 14:23:04,531 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2023-09-01 14:23:04,531 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 14:23:04,531 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2023-09-01 14:23:04,531 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=129, Invalid=521, Unknown=0, NotChecked=0, Total=650 [2023-09-01 14:23:04,637 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 55 out of 137 [2023-09-01 14:23:04,637 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) [2023-09-01 14:23:04,638 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 14:23:04,638 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 55 of 137 [2023-09-01 14:23:04,638 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 14:23:33,744 INFO L130 PetriNetUnfolder]: 12790/25146 cut-off events. [2023-09-01 14:23:33,745 INFO L131 PetriNetUnfolder]: For 1462728/1462728 co-relation queries the response was YES. [2023-09-01 14:23:33,984 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. [2023-09-01 14:23:34,115 INFO L137 encePairwiseOnDemand]: 128/137 looper letters, 1887 selfloop transitions, 2564 changer transitions 19/4470 dead transitions. [2023-09-01 14:23:34,115 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 684 places, 4470 transitions, 179281 flow [2023-09-01 14:23:34,116 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 59 states. [2023-09-01 14:23:34,116 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 59 states. [2023-09-01 14:23:34,117 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 3547 transitions. [2023-09-01 14:23:34,118 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43882221947296796 [2023-09-01 14:23:34,118 INFO L72 ComplementDD]: Start complementDD. Operand 59 states and 3547 transitions. [2023-09-01 14:23:34,118 INFO L73 IsDeterministic]: Start isDeterministic. Operand 59 states and 3547 transitions. [2023-09-01 14:23:34,118 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 14:23:34,118 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 59 states and 3547 transitions. [2023-09-01 14:23:34,121 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) [2023-09-01 14:23:34,124 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) [2023-09-01 14:23:34,125 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) [2023-09-01 14:23:34,125 INFO L175 Difference]: Start difference. First operand has 626 places, 3718 transitions, 148508 flow. Second operand 59 states and 3547 transitions. [2023-09-01 14:23:34,125 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 684 places, 4470 transitions, 179281 flow [2023-09-01 14:24:00,018 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 667 places, 4470 transitions, 177826 flow, removed 292 selfloop flow, removed 17 redundant places. [2023-09-01 14:24:00,132 INFO L231 Difference]: Finished difference. Result has 677 places, 4134 transitions, 170891 flow [2023-09-01 14:24:00,135 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} [2023-09-01 14:24:00,136 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 657 predicate places. [2023-09-01 14:24:00,136 INFO L495 AbstractCegarLoop]: Abstraction has has 677 places, 4134 transitions, 170891 flow [2023-09-01 14:24:00,136 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) [2023-09-01 14:24:00,136 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 14:24:00,136 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 14:24:00,141 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Ended with exit code 0 [2023-09-01 14:24:00,340 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30,30 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 14:24:00,340 INFO L420 AbstractCegarLoop]: === Iteration 32 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-09-01 14:24:00,341 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 14:24:00,341 INFO L85 PathProgramCache]: Analyzing trace with hash 2007987801, now seen corresponding path program 29 times [2023-09-01 14:24:00,341 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 14:24:00,341 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [412717663] [2023-09-01 14:24:00,341 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 14:24:00,341 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 14:24:00,347 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 14:24:00,452 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 5 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 14:24:00,453 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 14:24:00,453 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [412717663] [2023-09-01 14:24:00,453 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [412717663] provided 0 perfect and 1 imperfect interpolant sequences [2023-09-01 14:24:00,453 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [917088822] [2023-09-01 14:24:00,453 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-09-01 14:24:00,453 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 14:24:00,453 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-09-01 14:24:00,457 INFO L229 MonitoredProcess]: Starting monitored process 31 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-09-01 14:24:00,459 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Waiting until timeout for monitored process [2023-09-01 14:24:00,519 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2023-09-01 14:24:00,519 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-09-01 14:24:00,520 INFO L263 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 11 conjunts are in the unsatisfiable core [2023-09-01 14:24:00,520 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 14:24:00,695 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 10 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 14:24:00,696 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-09-01 14:24:00,811 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 7 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 14:24:00,811 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [917088822] provided 0 perfect and 2 imperfect interpolant sequences [2023-09-01 14:24:00,811 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-09-01 14:24:00,811 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 25 [2023-09-01 14:24:00,812 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [797673266] [2023-09-01 14:24:00,812 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-09-01 14:24:00,812 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2023-09-01 14:24:00,812 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 14:24:00,812 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2023-09-01 14:24:00,812 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=137, Invalid=463, Unknown=0, NotChecked=0, Total=600 [2023-09-01 14:24:00,904 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 55 out of 137 [2023-09-01 14:24:00,905 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) [2023-09-01 14:24:00,905 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 14:24:00,905 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 55 of 137 [2023-09-01 14:24:00,905 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 14:24:36,018 INFO L130 PetriNetUnfolder]: 13442/26547 cut-off events. [2023-09-01 14:24:36,019 INFO L131 PetriNetUnfolder]: For 1687724/1687724 co-relation queries the response was YES. [2023-09-01 14:24:36,441 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. [2023-09-01 14:24:36,586 INFO L137 encePairwiseOnDemand]: 129/137 looper letters, 1338 selfloop transitions, 3366 changer transitions 6/4710 dead transitions. [2023-09-01 14:24:36,586 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 746 places, 4710 transitions, 194345 flow [2023-09-01 14:24:36,586 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 73 states. [2023-09-01 14:24:36,587 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 73 states. [2023-09-01 14:24:36,589 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 73 states to 73 states and 4384 transitions. [2023-09-01 14:24:36,590 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4383561643835616 [2023-09-01 14:24:36,590 INFO L72 ComplementDD]: Start complementDD. Operand 73 states and 4384 transitions. [2023-09-01 14:24:36,590 INFO L73 IsDeterministic]: Start isDeterministic. Operand 73 states and 4384 transitions. [2023-09-01 14:24:36,590 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 14:24:36,590 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 73 states and 4384 transitions. [2023-09-01 14:24:36,594 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) [2023-09-01 14:24:36,598 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) [2023-09-01 14:24:36,599 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) [2023-09-01 14:24:36,599 INFO L175 Difference]: Start difference. First operand has 677 places, 4134 transitions, 170891 flow. Second operand 73 states and 4384 transitions. [2023-09-01 14:24:36,599 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 746 places, 4710 transitions, 194345 flow [2023-09-01 14:25:08,654 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 705 places, 4710 transitions, 192161 flow, removed 387 selfloop flow, removed 41 redundant places. [2023-09-01 14:25:08,771 INFO L231 Difference]: Finished difference. Result has 712 places, 4362 transitions, 186521 flow [2023-09-01 14:25:08,773 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} [2023-09-01 14:25:08,774 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 692 predicate places. [2023-09-01 14:25:08,774 INFO L495 AbstractCegarLoop]: Abstraction has has 712 places, 4362 transitions, 186521 flow [2023-09-01 14:25:08,774 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) [2023-09-01 14:25:08,774 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 14:25:08,774 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 14:25:08,779 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Forceful destruction successful, exit code 0 [2023-09-01 14:25:08,976 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 31 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable31 [2023-09-01 14:25:08,977 INFO L420 AbstractCegarLoop]: === Iteration 33 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-09-01 14:25:08,977 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 14:25:08,977 INFO L85 PathProgramCache]: Analyzing trace with hash -1247701379, now seen corresponding path program 30 times [2023-09-01 14:25:08,977 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 14:25:08,977 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [708750928] [2023-09-01 14:25:08,977 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 14:25:08,977 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 14:25:08,983 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 14:25:09,089 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 1 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 14:25:09,089 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 14:25:09,089 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [708750928] [2023-09-01 14:25:09,089 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [708750928] provided 0 perfect and 1 imperfect interpolant sequences [2023-09-01 14:25:09,089 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [866973430] [2023-09-01 14:25:09,089 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-09-01 14:25:09,090 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 14:25:09,090 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-09-01 14:25:09,091 INFO L229 MonitoredProcess]: Starting monitored process 32 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-09-01 14:25:09,092 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Waiting until timeout for monitored process [2023-09-01 14:25:09,152 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2023-09-01 14:25:09,152 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-09-01 14:25:09,152 INFO L263 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 15 conjunts are in the unsatisfiable core [2023-09-01 14:25:09,153 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 14:25:09,246 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 6 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 14:25:09,246 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-09-01 14:25:09,453 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 2 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 14:25:09,453 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [866973430] provided 0 perfect and 2 imperfect interpolant sequences [2023-09-01 14:25:09,453 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-09-01 14:25:09,454 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 28 [2023-09-01 14:25:09,454 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1388682463] [2023-09-01 14:25:09,454 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-09-01 14:25:09,454 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2023-09-01 14:25:09,454 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 14:25:09,454 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2023-09-01 14:25:09,455 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=156, Invalid=600, Unknown=0, NotChecked=0, Total=756 [2023-09-01 14:25:09,558 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 55 out of 137 [2023-09-01 14:25:09,559 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) [2023-09-01 14:25:09,559 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 14:25:09,559 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 55 of 137 [2023-09-01 14:25:09,559 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 14:25:46,965 INFO L130 PetriNetUnfolder]: 14093/27798 cut-off events. [2023-09-01 14:25:46,965 INFO L131 PetriNetUnfolder]: For 1832570/1832570 co-relation queries the response was YES. [2023-09-01 14:25:47,266 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. [2023-09-01 14:25:47,579 INFO L137 encePairwiseOnDemand]: 129/137 looper letters, 871 selfloop transitions, 3890 changer transitions 17/4778 dead transitions. [2023-09-01 14:25:47,579 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 752 places, 4778 transitions, 208282 flow [2023-09-01 14:25:47,579 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2023-09-01 14:25:47,579 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 41 states. [2023-09-01 14:25:47,581 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 2480 transitions. [2023-09-01 14:25:47,581 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44151682392736336 [2023-09-01 14:25:47,581 INFO L72 ComplementDD]: Start complementDD. Operand 41 states and 2480 transitions. [2023-09-01 14:25:47,581 INFO L73 IsDeterministic]: Start isDeterministic. Operand 41 states and 2480 transitions. [2023-09-01 14:25:47,582 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 14:25:47,582 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 41 states and 2480 transitions. [2023-09-01 14:25:47,584 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) [2023-09-01 14:25:47,586 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) [2023-09-01 14:25:47,586 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) [2023-09-01 14:25:47,586 INFO L175 Difference]: Start difference. First operand has 712 places, 4362 transitions, 186521 flow. Second operand 41 states and 2480 transitions. [2023-09-01 14:25:47,586 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 752 places, 4778 transitions, 208282 flow [2023-09-01 14:26:24,817 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 710 places, 4778 transitions, 206235 flow, removed 359 selfloop flow, removed 42 redundant places. [2023-09-01 14:26:24,943 INFO L231 Difference]: Finished difference. Result has 720 places, 4585 transitions, 205454 flow [2023-09-01 14:26:24,946 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} [2023-09-01 14:26:24,946 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 700 predicate places. [2023-09-01 14:26:24,947 INFO L495 AbstractCegarLoop]: Abstraction has has 720 places, 4585 transitions, 205454 flow [2023-09-01 14:26:24,947 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) [2023-09-01 14:26:24,947 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 14:26:24,947 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 14:26:24,953 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Ended with exit code 0 [2023-09-01 14:26:25,147 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 [2023-09-01 14:26:25,147 INFO L420 AbstractCegarLoop]: === Iteration 34 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-09-01 14:26:25,147 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 14:26:25,148 INFO L85 PathProgramCache]: Analyzing trace with hash -374253849, now seen corresponding path program 31 times [2023-09-01 14:26:25,148 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 14:26:25,148 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1098114198] [2023-09-01 14:26:25,148 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 14:26:25,148 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 14:26:25,154 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 14:26:25,264 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 5 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 14:26:25,264 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 14:26:25,264 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1098114198] [2023-09-01 14:26:25,264 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1098114198] provided 0 perfect and 1 imperfect interpolant sequences [2023-09-01 14:26:25,264 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1608907746] [2023-09-01 14:26:25,264 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-09-01 14:26:25,264 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 14:26:25,264 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-09-01 14:26:25,265 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) [2023-09-01 14:26:25,266 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Waiting until timeout for monitored process [2023-09-01 14:26:25,323 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 14:26:25,323 INFO L263 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 14 conjunts are in the unsatisfiable core [2023-09-01 14:26:25,324 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 14:26:25,408 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 7 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 14:26:25,408 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-09-01 14:26:25,603 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 5 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 14:26:25,604 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1608907746] provided 0 perfect and 2 imperfect interpolant sequences [2023-09-01 14:26:25,604 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-09-01 14:26:25,604 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 27 [2023-09-01 14:26:25,604 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1375404807] [2023-09-01 14:26:25,604 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-09-01 14:26:25,604 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2023-09-01 14:26:25,604 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 14:26:25,604 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2023-09-01 14:26:25,605 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=187, Invalid=515, Unknown=0, NotChecked=0, Total=702 [2023-09-01 14:26:25,691 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 55 out of 137 [2023-09-01 14:26:25,692 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) [2023-09-01 14:26:25,692 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 14:26:25,692 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 55 of 137 [2023-09-01 14:26:25,692 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 14:27:11,841 INFO L130 PetriNetUnfolder]: 15802/31241 cut-off events. [2023-09-01 14:27:11,841 INFO L131 PetriNetUnfolder]: For 2252934/2252934 co-relation queries the response was YES. [2023-09-01 14:27:12,231 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. [2023-09-01 14:27:12,405 INFO L137 encePairwiseOnDemand]: 129/137 looper letters, 564 selfloop transitions, 4778 changer transitions 13/5355 dead transitions. [2023-09-01 14:27:12,406 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 781 places, 5355 transitions, 241091 flow [2023-09-01 14:27:12,406 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 62 states. [2023-09-01 14:27:12,406 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 62 states. [2023-09-01 14:27:12,408 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 3710 transitions. [2023-09-01 14:27:12,408 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4367789027548858 [2023-09-01 14:27:12,408 INFO L72 ComplementDD]: Start complementDD. Operand 62 states and 3710 transitions. [2023-09-01 14:27:12,409 INFO L73 IsDeterministic]: Start isDeterministic. Operand 62 states and 3710 transitions. [2023-09-01 14:27:12,409 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 14:27:12,409 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 62 states and 3710 transitions. [2023-09-01 14:27:12,412 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) [2023-09-01 14:27:12,415 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) [2023-09-01 14:27:12,415 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) [2023-09-01 14:27:12,415 INFO L175 Difference]: Start difference. First operand has 720 places, 4585 transitions, 205454 flow. Second operand 62 states and 3710 transitions. [2023-09-01 14:27:12,415 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 781 places, 5355 transitions, 241091 flow [2023-09-01 14:27:57,850 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 766 places, 5355 transitions, 240645 flow, removed 147 selfloop flow, removed 15 redundant places. [2023-09-01 14:27:58,090 INFO L231 Difference]: Finished difference. Result has 781 places, 5166 transitions, 243311 flow [2023-09-01 14:27:58,092 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} [2023-09-01 14:27:58,093 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 761 predicate places. [2023-09-01 14:27:58,093 INFO L495 AbstractCegarLoop]: Abstraction has has 781 places, 5166 transitions, 243311 flow [2023-09-01 14:27:58,093 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) [2023-09-01 14:27:58,093 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 14:27:58,093 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 14:27:58,098 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Forceful destruction successful, exit code 0 [2023-09-01 14:27:58,297 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 [2023-09-01 14:27:58,297 INFO L420 AbstractCegarLoop]: === Iteration 35 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-09-01 14:27:58,298 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 14:27:58,298 INFO L85 PathProgramCache]: Analyzing trace with hash 843710407, now seen corresponding path program 32 times [2023-09-01 14:27:58,298 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 14:27:58,298 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [110246257] [2023-09-01 14:27:58,298 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 14:27:58,298 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 14:27:58,304 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 14:27:58,408 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 6 proven. 9 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-09-01 14:27:58,408 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 14:27:58,408 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [110246257] [2023-09-01 14:27:58,408 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [110246257] provided 0 perfect and 1 imperfect interpolant sequences [2023-09-01 14:27:58,408 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [960321947] [2023-09-01 14:27:58,408 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-09-01 14:27:58,408 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 14:27:58,409 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-09-01 14:27:58,409 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) [2023-09-01 14:27:58,411 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Waiting until timeout for monitored process [2023-09-01 14:27:58,473 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-09-01 14:27:58,473 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-09-01 14:27:58,474 INFO L263 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 15 conjunts are in the unsatisfiable core [2023-09-01 14:27:58,474 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 14:27:58,577 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 8 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 14:27:58,577 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-09-01 14:27:58,734 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 7 proven. 8 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-09-01 14:27:58,734 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [960321947] provided 0 perfect and 2 imperfect interpolant sequences [2023-09-01 14:27:58,734 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-09-01 14:27:58,734 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11, 10] total 27 [2023-09-01 14:27:58,734 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [548411670] [2023-09-01 14:27:58,734 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-09-01 14:27:58,734 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2023-09-01 14:27:58,734 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 14:27:58,735 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2023-09-01 14:27:58,735 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=159, Invalid=543, Unknown=0, NotChecked=0, Total=702 [2023-09-01 14:27:58,834 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 55 out of 137 [2023-09-01 14:27:58,834 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) [2023-09-01 14:27:58,835 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 14:27:58,835 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 55 of 137 [2023-09-01 14:27:58,835 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 14:28:56,063 INFO L130 PetriNetUnfolder]: 17620/34603 cut-off events. [2023-09-01 14:28:56,063 INFO L131 PetriNetUnfolder]: For 2812587/2812587 co-relation queries the response was YES. [2023-09-01 14:28:56,562 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. [2023-09-01 14:28:56,762 INFO L137 encePairwiseOnDemand]: 129/137 looper letters, 1721 selfloop transitions, 4292 changer transitions 91/6104 dead transitions. [2023-09-01 14:28:56,762 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 822 places, 6104 transitions, 293304 flow [2023-09-01 14:28:56,762 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2023-09-01 14:28:56,762 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 44 states. [2023-09-01 14:28:56,763 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 2660 transitions. [2023-09-01 14:28:56,764 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44127405441274054 [2023-09-01 14:28:56,764 INFO L72 ComplementDD]: Start complementDD. Operand 44 states and 2660 transitions. [2023-09-01 14:28:56,764 INFO L73 IsDeterministic]: Start isDeterministic. Operand 44 states and 2660 transitions. [2023-09-01 14:28:56,764 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 14:28:56,764 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 44 states and 2660 transitions. [2023-09-01 14:28:56,766 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) [2023-09-01 14:28:56,768 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) [2023-09-01 14:28:56,769 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) [2023-09-01 14:28:56,769 INFO L175 Difference]: Start difference. First operand has 781 places, 5166 transitions, 243311 flow. Second operand 44 states and 2660 transitions. [2023-09-01 14:28:56,769 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 822 places, 6104 transitions, 293304 flow [2023-09-01 14:30:12,389 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 798 places, 6104 transitions, 287470 flow, removed 1162 selfloop flow, removed 24 redundant places. [2023-09-01 14:30:12,564 INFO L231 Difference]: Finished difference. Result has 810 places, 5778 transitions, 280384 flow [2023-09-01 14:30:12,567 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} [2023-09-01 14:30:12,567 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 790 predicate places. [2023-09-01 14:30:12,567 INFO L495 AbstractCegarLoop]: Abstraction has has 810 places, 5778 transitions, 280384 flow [2023-09-01 14:30:12,567 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) [2023-09-01 14:30:12,567 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 14:30:12,568 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 14:30:12,572 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Forceful destruction successful, exit code 0 [2023-09-01 14:30:12,768 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 [2023-09-01 14:30:12,768 INFO L420 AbstractCegarLoop]: === Iteration 36 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-09-01 14:30:12,768 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 14:30:12,768 INFO L85 PathProgramCache]: Analyzing trace with hash 1484966421, now seen corresponding path program 33 times [2023-09-01 14:30:12,768 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 14:30:12,768 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1213099773] [2023-09-01 14:30:12,769 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 14:30:12,769 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 14:30:12,776 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 14:30:12,912 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 4 proven. 15 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-09-01 14:30:12,912 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 14:30:12,912 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1213099773] [2023-09-01 14:30:12,912 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1213099773] provided 0 perfect and 1 imperfect interpolant sequences [2023-09-01 14:30:12,912 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1490302915] [2023-09-01 14:30:12,912 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-09-01 14:30:12,912 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 14:30:12,913 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-09-01 14:30:12,913 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) [2023-09-01 14:30:12,914 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Waiting until timeout for monitored process [2023-09-01 14:30:12,978 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2023-09-01 14:30:12,978 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-09-01 14:30:12,978 INFO L263 TraceCheckSpWp]: Trace formula consists of 138 conjuncts, 18 conjunts are in the unsatisfiable core [2023-09-01 14:30:12,979 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 14:30:13,124 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 4 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 14:30:13,124 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-09-01 14:30:13,418 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 5 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 14:30:13,418 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1490302915] provided 0 perfect and 2 imperfect interpolant sequences [2023-09-01 14:30:13,418 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-09-01 14:30:13,418 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 12, 12] total 28 [2023-09-01 14:30:13,418 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [868788461] [2023-09-01 14:30:13,419 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-09-01 14:30:13,419 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2023-09-01 14:30:13,419 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 14:30:13,419 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2023-09-01 14:30:13,420 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=184, Invalid=628, Unknown=0, NotChecked=0, Total=812 [2023-09-01 14:30:13,552 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 55 out of 137 [2023-09-01 14:30:13,552 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) [2023-09-01 14:30:13,552 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 14:30:13,553 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 55 of 137 [2023-09-01 14:30:13,553 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 14:31:29,504 INFO L130 PetriNetUnfolder]: 20082/39656 cut-off events. [2023-09-01 14:31:29,504 INFO L131 PetriNetUnfolder]: For 3344915/3344915 co-relation queries the response was YES. [2023-09-01 14:31:30,219 INFO L83 FinitePrefix]: Finished finitePrefix Result has 621852 conditions, 39656 events. 20082/39656 cut-off events. For 3344915/3344915 co-relation queries the response was YES. Maximal size of possible extension queue 2890. Compared 417405 event pairs, 295 based on Foata normal form. 344/40000 useless extension candidates. Maximal degree in co-relation 619398. Up to 10457 conditions per place. [2023-09-01 14:31:30,453 INFO L137 encePairwiseOnDemand]: 129/137 looper letters, 2245 selfloop transitions, 4597 changer transitions 36/6878 dead transitions. [2023-09-01 14:31:30,454 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 854 places, 6878 transitions, 338387 flow [2023-09-01 14:31:30,454 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2023-09-01 14:31:30,454 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 45 states. [2023-09-01 14:31:30,455 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 2718 transitions. [2023-09-01 14:31:30,456 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4408759124087591 [2023-09-01 14:31:30,456 INFO L72 ComplementDD]: Start complementDD. Operand 45 states and 2718 transitions. [2023-09-01 14:31:30,456 INFO L73 IsDeterministic]: Start isDeterministic. Operand 45 states and 2718 transitions. [2023-09-01 14:31:30,456 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 14:31:30,456 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 45 states and 2718 transitions. [2023-09-01 14:31:30,459 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 46 states, 45 states have (on average 60.4) internal successors, (2718), 45 states have internal predecessors, (2718), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 14:31:30,461 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 46 states, 46 states have (on average 137.0) internal successors, (6302), 46 states have internal predecessors, (6302), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 14:31:30,461 INFO L81 ComplementDD]: Finished complementDD. Result has 46 states, 46 states have (on average 137.0) internal successors, (6302), 46 states have internal predecessors, (6302), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 14:31:30,461 INFO L175 Difference]: Start difference. First operand has 810 places, 5778 transitions, 280384 flow. Second operand 45 states and 2718 transitions. [2023-09-01 14:31:30,462 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 854 places, 6878 transitions, 338387 flow [2023-09-01 14:33:08,335 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 834 places, 6878 transitions, 336993 flow, removed 409 selfloop flow, removed 20 redundant places. [2023-09-01 14:33:08,558 INFO L231 Difference]: Finished difference. Result has 850 places, 6588 transitions, 335700 flow [2023-09-01 14:33:08,562 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=137, PETRI_DIFFERENCE_MINUEND_FLOW=279036, PETRI_DIFFERENCE_MINUEND_PLACES=790, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=5776, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3828, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=1520, PETRI_DIFFERENCE_SUBTRAHEND_STATES=45, PETRI_FLOW=335700, PETRI_PLACES=850, PETRI_TRANSITIONS=6588} [2023-09-01 14:33:08,562 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 830 predicate places. [2023-09-01 14:33:08,562 INFO L495 AbstractCegarLoop]: Abstraction has has 850 places, 6588 transitions, 335700 flow [2023-09-01 14:33:08,563 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has 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) [2023-09-01 14:33:08,563 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 14:33:08,563 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 14:33:08,569 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Forceful destruction successful, exit code 0 [2023-09-01 14:33:08,767 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 35 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable35 [2023-09-01 14:33:08,768 INFO L420 AbstractCegarLoop]: === Iteration 37 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-09-01 14:33:08,768 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 14:33:08,768 INFO L85 PathProgramCache]: Analyzing trace with hash -854247948, now seen corresponding path program 34 times [2023-09-01 14:33:08,768 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 14:33:08,768 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1847869749] [2023-09-01 14:33:08,769 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 14:33:08,769 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 14:33:08,783 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 14:33:08,892 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 3 proven. 12 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-09-01 14:33:08,892 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 14:33:08,893 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1847869749] [2023-09-01 14:33:08,893 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1847869749] provided 0 perfect and 1 imperfect interpolant sequences [2023-09-01 14:33:08,893 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [234509498] [2023-09-01 14:33:08,893 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-09-01 14:33:08,893 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 14:33:08,893 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-09-01 14:33:08,894 INFO L229 MonitoredProcess]: Starting monitored process 36 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-09-01 14:33:08,896 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (36)] Waiting until timeout for monitored process [2023-09-01 14:33:08,958 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-09-01 14:33:08,958 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-09-01 14:33:08,959 INFO L263 TraceCheckSpWp]: Trace formula consists of 133 conjuncts, 21 conjunts are in the unsatisfiable core [2023-09-01 14:33:08,959 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 14:33:09,043 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 3 proven. 12 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-09-01 14:33:09,043 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-09-01 14:33:09,483 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 14:33:09,483 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [234509498] provided 0 perfect and 2 imperfect interpolant sequences [2023-09-01 14:33:09,483 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-09-01 14:33:09,483 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 12] total 27 [2023-09-01 14:33:09,484 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1358514492] [2023-09-01 14:33:09,484 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-09-01 14:33:09,484 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2023-09-01 14:33:09,484 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 14:33:09,484 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2023-09-01 14:33:09,484 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=143, Invalid=613, Unknown=0, NotChecked=0, Total=756 [2023-09-01 14:33:09,660 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 55 out of 137 [2023-09-01 14:33:09,661 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 850 places, 6588 transitions, 335700 flow. Second operand has 28 states, 28 states have (on average 56.57142857142857) internal successors, (1584), 28 states have internal predecessors, (1584), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 14:33:09,661 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 14:33:09,661 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 55 of 137 [2023-09-01 14:33:09,661 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand Killed by 15