./Ultimate.py --spec ../../../trunk/examples/svcomp/properties/unreach-call.prp --file ../../../trunk/examples/svcomp/weaver/parallel-misc-5.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/parallel-misc-5.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 3f696f3d7a078e1a0d9bb5ce793945c7092990826a45e57529562474d0b18f4a --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 12:44:53,051 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-09-01 12:44:53,053 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-09-01 12:44:53,083 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2023-09-01 12:44:53,083 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2023-09-01 12:44:53,085 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2023-09-01 12:44:53,087 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2023-09-01 12:44:53,088 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2023-09-01 12:44:53,090 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2023-09-01 12:44:53,093 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2023-09-01 12:44:53,094 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2023-09-01 12:44:53,096 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2023-09-01 12:44:53,096 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2023-09-01 12:44:53,097 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2023-09-01 12:44:53,098 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2023-09-01 12:44:53,101 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2023-09-01 12:44:53,102 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2023-09-01 12:44:53,103 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2023-09-01 12:44:53,104 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2023-09-01 12:44:53,107 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2023-09-01 12:44:53,108 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2023-09-01 12:44:53,109 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2023-09-01 12:44:53,109 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2023-09-01 12:44:53,110 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2023-09-01 12:44:53,115 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2023-09-01 12:44:53,115 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2023-09-01 12:44:53,115 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2023-09-01 12:44:53,116 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2023-09-01 12:44:53,117 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2023-09-01 12:44:53,117 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2023-09-01 12:44:53,118 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2023-09-01 12:44:53,119 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2023-09-01 12:44:53,120 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2023-09-01 12:44:53,121 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2023-09-01 12:44:53,121 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2023-09-01 12:44:53,121 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2023-09-01 12:44:53,122 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2023-09-01 12:44:53,122 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2023-09-01 12:44:53,122 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2023-09-01 12:44:53,123 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2023-09-01 12:44:53,123 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2023-09-01 12:44:53,124 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2023-09-01 12:44:53,148 INFO L113 SettingsManager]: Loading preferences was successful [2023-09-01 12:44:53,149 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-09-01 12:44:53,149 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-09-01 12:44:53,150 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-09-01 12:44:53,150 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-09-01 12:44:53,150 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-09-01 12:44:53,151 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-09-01 12:44:53,151 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2023-09-01 12:44:53,151 INFO L138 SettingsManager]: * Use SBE=true [2023-09-01 12:44:53,151 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-09-01 12:44:53,152 INFO L138 SettingsManager]: * sizeof long=4 [2023-09-01 12:44:53,152 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-09-01 12:44:53,152 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-09-01 12:44:53,152 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-09-01 12:44:53,152 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-09-01 12:44:53,152 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-09-01 12:44:53,153 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-09-01 12:44:53,153 INFO L138 SettingsManager]: * sizeof long double=12 [2023-09-01 12:44:53,153 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2023-09-01 12:44:53,153 INFO L138 SettingsManager]: * Use constant arrays=true [2023-09-01 12:44:53,153 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-09-01 12:44:53,153 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-09-01 12:44:53,153 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-09-01 12:44:53,154 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-09-01 12:44:53,154 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-09-01 12:44:53,154 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-09-01 12:44:53,154 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-09-01 12:44:53,154 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-09-01 12:44:53,154 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2023-09-01 12:44:53,155 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-09-01 12:44:53,155 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-09-01 12:44:53,155 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-09-01 12:44:53,155 INFO L138 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-09-01 12:44:53,155 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-09-01 12:44:53,155 INFO L138 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-09-01 12:44:53,155 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 3f696f3d7a078e1a0d9bb5ce793945c7092990826a45e57529562474d0b18f4a Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: When to check the insufficient erros location relative to the other error locations -> BEFORE [2023-09-01 12:44:53,400 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-09-01 12:44:53,411 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-09-01 12:44:53,415 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-09-01 12:44:53,416 INFO L271 PluginConnector]: Initializing CDTParser... [2023-09-01 12:44:53,416 INFO L275 PluginConnector]: CDTParser initialized [2023-09-01 12:44:53,417 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/weaver/parallel-misc-5.wvr.c [2023-09-01 12:44:54,363 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-09-01 12:44:54,559 INFO L351 CDTParser]: Found 1 translation units. [2023-09-01 12:44:54,560 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/weaver/parallel-misc-5.wvr.c [2023-09-01 12:44:54,570 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/e39986d85/f28e6dcdc0e4447e96f56c78f8fdfe85/FLAG6a0c6219d [2023-09-01 12:44:54,579 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/e39986d85/f28e6dcdc0e4447e96f56c78f8fdfe85 [2023-09-01 12:44:54,584 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-09-01 12:44:54,585 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2023-09-01 12:44:54,587 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-09-01 12:44:54,587 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-09-01 12:44:54,589 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-09-01 12:44:54,590 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 01.09 12:44:54" (1/1) ... [2023-09-01 12:44:54,591 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3b3a1a02 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 12:44:54, skipping insertion in model container [2023-09-01 12:44:54,591 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 01.09 12:44:54" (1/1) ... [2023-09-01 12:44:54,595 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-09-01 12:44:54,611 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-09-01 12:44:54,712 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/parallel-misc-5.wvr.c[3027,3040] [2023-09-01 12:44:54,718 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-09-01 12:44:54,724 INFO L203 MainTranslator]: Completed pre-run [2023-09-01 12:44:54,738 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/parallel-misc-5.wvr.c[3027,3040] [2023-09-01 12:44:54,739 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-09-01 12:44:54,743 WARN L667 CHandler]: The function __VERIFIER_atomic_begin is called, but not defined or handled by StandardFunctionHandler. [2023-09-01 12:44:54,744 WARN L667 CHandler]: The function __VERIFIER_atomic_end is called, but not defined or handled by StandardFunctionHandler. [2023-09-01 12:44:54,748 INFO L208 MainTranslator]: Completed translation [2023-09-01 12:44:54,748 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 12:44:54 WrapperNode [2023-09-01 12:44:54,748 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-09-01 12:44:54,749 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-09-01 12:44:54,749 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-09-01 12:44:54,749 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2023-09-01 12:44:54,753 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 12:44:54" (1/1) ... [2023-09-01 12:44:54,765 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 12:44:54" (1/1) ... [2023-09-01 12:44:54,791 INFO L138 Inliner]: procedures = 22, calls = 45, calls flagged for inlining = 5, calls inlined = 5, statements flattened = 149 [2023-09-01 12:44:54,791 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-09-01 12:44:54,791 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-09-01 12:44:54,792 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2023-09-01 12:44:54,792 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2023-09-01 12:44:54,798 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 12:44:54" (1/1) ... [2023-09-01 12:44:54,799 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 12:44:54" (1/1) ... [2023-09-01 12:44:54,809 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 12:44:54" (1/1) ... [2023-09-01 12:44:54,809 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 12:44:54" (1/1) ... [2023-09-01 12:44:54,817 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 12:44:54" (1/1) ... [2023-09-01 12:44:54,823 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 12:44:54" (1/1) ... [2023-09-01 12:44:54,825 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 12:44:54" (1/1) ... [2023-09-01 12:44:54,830 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 12:44:54" (1/1) ... [2023-09-01 12:44:54,832 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-09-01 12:44:54,834 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-09-01 12:44:54,834 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2023-09-01 12:44:54,834 INFO L275 PluginConnector]: RCFGBuilder initialized [2023-09-01 12:44:54,835 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 12:44:54" (1/1) ... [2023-09-01 12:44:54,838 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-09-01 12:44:54,847 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-09-01 12:44:54,856 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 12:44:54,876 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 12:44:54,884 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-09-01 12:44:54,884 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2023-09-01 12:44:54,884 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2023-09-01 12:44:54,885 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2023-09-01 12:44:54,885 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2023-09-01 12:44:54,886 INFO L130 BoogieDeclarations]: Found specification of procedure thread3 [2023-09-01 12:44:54,886 INFO L138 BoogieDeclarations]: Found implementation of procedure thread3 [2023-09-01 12:44:54,886 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-09-01 12:44:54,886 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-09-01 12:44:54,886 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-09-01 12:44:54,886 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2023-09-01 12:44:54,886 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2023-09-01 12:44:54,886 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-09-01 12:44:54,886 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-09-01 12:44:54,887 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-09-01 12:44:54,887 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-09-01 12:44:54,888 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 12:44:55,015 INFO L236 CfgBuilder]: Building ICFG [2023-09-01 12:44:55,016 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-09-01 12:44:55,240 INFO L277 CfgBuilder]: Performing block encoding [2023-09-01 12:44:55,286 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-09-01 12:44:55,286 INFO L302 CfgBuilder]: Removed 2 assume(true) statements. [2023-09-01 12:44:55,287 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 01.09 12:44:55 BoogieIcfgContainer [2023-09-01 12:44:55,288 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-09-01 12:44:55,289 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-09-01 12:44:55,289 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2023-09-01 12:44:55,291 INFO L275 PluginConnector]: TraceAbstraction initialized [2023-09-01 12:44:55,291 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 01.09 12:44:54" (1/3) ... [2023-09-01 12:44:55,291 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@65f267fd and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 01.09 12:44:55, skipping insertion in model container [2023-09-01 12:44:55,291 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 12:44:54" (2/3) ... [2023-09-01 12:44:55,291 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@65f267fd and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 01.09 12:44:55, skipping insertion in model container [2023-09-01 12:44:55,291 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 01.09 12:44:55" (3/3) ... [2023-09-01 12:44:55,292 INFO L112 eAbstractionObserver]: Analyzing ICFG parallel-misc-5.wvr.c [2023-09-01 12:44:55,297 WARN L145 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2023-09-01 12:44:55,302 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-09-01 12:44:55,303 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-09-01 12:44:55,303 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-09-01 12:44:55,348 INFO L144 ThreadInstanceAdder]: Constructed 3 joinOtherThreadTransitions. [2023-09-01 12:44:55,370 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 112 places, 109 transitions, 242 flow [2023-09-01 12:44:55,430 INFO L130 PetriNetUnfolder]: 7/106 cut-off events. [2023-09-01 12:44:55,430 INFO L131 PetriNetUnfolder]: For 3/3 co-relation queries the response was YES. [2023-09-01 12:44:55,435 INFO L83 FinitePrefix]: Finished finitePrefix Result has 119 conditions, 106 events. 7/106 cut-off events. For 3/3 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 84 event pairs, 0 based on Foata normal form. 0/98 useless extension candidates. Maximal degree in co-relation 84. Up to 2 conditions per place. [2023-09-01 12:44:55,435 INFO L82 GeneralOperation]: Start removeDead. Operand has 112 places, 109 transitions, 242 flow [2023-09-01 12:44:55,438 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 99 places, 96 transitions, 210 flow [2023-09-01 12:44:55,441 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-09-01 12:44:55,449 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 99 places, 96 transitions, 210 flow [2023-09-01 12:44:55,454 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 99 places, 96 transitions, 210 flow [2023-09-01 12:44:55,454 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 99 places, 96 transitions, 210 flow [2023-09-01 12:44:55,498 INFO L130 PetriNetUnfolder]: 7/96 cut-off events. [2023-09-01 12:44:55,498 INFO L131 PetriNetUnfolder]: For 3/3 co-relation queries the response was YES. [2023-09-01 12:44:55,499 INFO L83 FinitePrefix]: Finished finitePrefix Result has 109 conditions, 96 events. 7/96 cut-off events. For 3/3 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 85 event pairs, 0 based on Foata normal form. 0/89 useless extension candidates. Maximal degree in co-relation 84. Up to 2 conditions per place. [2023-09-01 12:44:55,500 INFO L119 LiptonReduction]: Number of co-enabled transitions 1370 [2023-09-01 12:44:58,277 INFO L134 LiptonReduction]: Checked pairs total: 1979 [2023-09-01 12:44:58,277 INFO L136 LiptonReduction]: Total number of compositions: 79 [2023-09-01 12:44:58,286 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-09-01 12:44:58,290 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;@96a943c, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-09-01 12:44:58,290 INFO L358 AbstractCegarLoop]: Starting to check reachability of 4 error locations. [2023-09-01 12:44:58,293 INFO L130 PetriNetUnfolder]: 2/21 cut-off events. [2023-09-01 12:44:58,294 INFO L131 PetriNetUnfolder]: For 3/3 co-relation queries the response was YES. [2023-09-01 12:44:58,294 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 12:44:58,294 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 12:44:58,294 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-09-01 12:44:58,297 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 12:44:58,297 INFO L85 PathProgramCache]: Analyzing trace with hash -771544553, now seen corresponding path program 1 times [2023-09-01 12:44:58,303 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 12:44:58,303 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [421658501] [2023-09-01 12:44:58,303 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 12:44:58,304 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 12:44:58,462 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 12:44:58,731 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 12:44:58,731 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 12:44:58,732 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [421658501] [2023-09-01 12:44:58,732 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [421658501] provided 1 perfect and 0 imperfect interpolant sequences [2023-09-01 12:44:58,732 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-09-01 12:44:58,732 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-09-01 12:44:58,733 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1274180799] [2023-09-01 12:44:58,734 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-09-01 12:44:58,739 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-09-01 12:44:58,742 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 12:44:58,756 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-09-01 12:44:58,756 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-09-01 12:44:58,798 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 87 out of 188 [2023-09-01 12:44:58,803 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 30 places, 22 transitions, 62 flow. Second operand has 5 states, 5 states have (on average 90.4) internal successors, (452), 5 states have internal predecessors, (452), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 12:44:58,803 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 12:44:58,803 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 87 of 188 [2023-09-01 12:44:58,804 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 12:44:58,976 INFO L130 PetriNetUnfolder]: 348/576 cut-off events. [2023-09-01 12:44:58,976 INFO L131 PetriNetUnfolder]: For 70/70 co-relation queries the response was YES. [2023-09-01 12:44:58,979 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1205 conditions, 576 events. 348/576 cut-off events. For 70/70 co-relation queries the response was YES. Maximal size of possible extension queue 49. Compared 2317 event pairs, 49 based on Foata normal form. 0/447 useless extension candidates. Maximal degree in co-relation 929. Up to 297 conditions per place. [2023-09-01 12:44:58,983 INFO L137 encePairwiseOnDemand]: 181/188 looper letters, 50 selfloop transitions, 5 changer transitions 18/75 dead transitions. [2023-09-01 12:44:58,983 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 36 places, 75 transitions, 350 flow [2023-09-01 12:44:58,984 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-09-01 12:44:58,986 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2023-09-01 12:44:58,995 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 684 transitions. [2023-09-01 12:44:58,997 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5197568389057751 [2023-09-01 12:44:58,998 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 684 transitions. [2023-09-01 12:44:58,998 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 684 transitions. [2023-09-01 12:44:59,000 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 12:44:59,001 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 684 transitions. [2023-09-01 12:44:59,004 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 97.71428571428571) internal successors, (684), 7 states have internal predecessors, (684), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 12:44:59,008 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 188.0) internal successors, (1504), 8 states have internal predecessors, (1504), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 12:44:59,008 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 188.0) internal successors, (1504), 8 states have internal predecessors, (1504), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 12:44:59,009 INFO L175 Difference]: Start difference. First operand has 30 places, 22 transitions, 62 flow. Second operand 7 states and 684 transitions. [2023-09-01 12:44:59,010 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 36 places, 75 transitions, 350 flow [2023-09-01 12:44:59,012 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 30 places, 75 transitions, 314 flow, removed 0 selfloop flow, removed 6 redundant places. [2023-09-01 12:44:59,014 INFO L231 Difference]: Finished difference. Result has 35 places, 26 transitions, 99 flow [2023-09-01 12:44:59,015 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=188, PETRI_DIFFERENCE_MINUEND_FLOW=50, PETRI_DIFFERENCE_MINUEND_PLACES=24, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=22, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=18, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=99, PETRI_PLACES=35, PETRI_TRANSITIONS=26} [2023-09-01 12:44:59,017 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 5 predicate places. [2023-09-01 12:44:59,017 INFO L495 AbstractCegarLoop]: Abstraction has has 35 places, 26 transitions, 99 flow [2023-09-01 12:44:59,017 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 90.4) internal successors, (452), 5 states have internal predecessors, (452), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 12:44:59,017 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 12:44:59,018 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 12:44:59,018 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-09-01 12:44:59,018 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-09-01 12:44:59,018 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 12:44:59,018 INFO L85 PathProgramCache]: Analyzing trace with hash -1110178059, now seen corresponding path program 2 times [2023-09-01 12:44:59,019 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 12:44:59,019 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1766390042] [2023-09-01 12:44:59,019 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 12:44:59,019 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 12:44:59,043 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 12:44:59,277 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 12:44:59,277 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 12:44:59,277 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1766390042] [2023-09-01 12:44:59,277 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1766390042] provided 1 perfect and 0 imperfect interpolant sequences [2023-09-01 12:44:59,277 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-09-01 12:44:59,278 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-09-01 12:44:59,278 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [435933035] [2023-09-01 12:44:59,278 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-09-01 12:44:59,279 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-09-01 12:44:59,280 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 12:44:59,280 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-09-01 12:44:59,280 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-09-01 12:44:59,306 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 89 out of 188 [2023-09-01 12:44:59,307 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 35 places, 26 transitions, 99 flow. Second operand has 4 states, 4 states have (on average 93.25) internal successors, (373), 4 states have internal predecessors, (373), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 12:44:59,307 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 12:44:59,307 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 89 of 188 [2023-09-01 12:44:59,307 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 12:44:59,413 INFO L130 PetriNetUnfolder]: 251/422 cut-off events. [2023-09-01 12:44:59,413 INFO L131 PetriNetUnfolder]: For 644/660 co-relation queries the response was YES. [2023-09-01 12:44:59,414 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1362 conditions, 422 events. 251/422 cut-off events. For 644/660 co-relation queries the response was YES. Maximal size of possible extension queue 32. Compared 1529 event pairs, 23 based on Foata normal form. 24/432 useless extension candidates. Maximal degree in co-relation 841. Up to 244 conditions per place. [2023-09-01 12:44:59,416 INFO L137 encePairwiseOnDemand]: 184/188 looper letters, 34 selfloop transitions, 6 changer transitions 0/42 dead transitions. [2023-09-01 12:44:59,416 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 36 places, 42 transitions, 248 flow [2023-09-01 12:44:59,417 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-09-01 12:44:59,417 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-09-01 12:44:59,417 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 391 transitions. [2023-09-01 12:44:59,418 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5199468085106383 [2023-09-01 12:44:59,418 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 391 transitions. [2023-09-01 12:44:59,418 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 391 transitions. [2023-09-01 12:44:59,418 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 12:44:59,419 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 391 transitions. [2023-09-01 12:44:59,420 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 97.75) internal successors, (391), 4 states have internal predecessors, (391), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 12:44:59,421 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 188.0) internal successors, (940), 5 states have internal predecessors, (940), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 12:44:59,422 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 188.0) internal successors, (940), 5 states have internal predecessors, (940), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 12:44:59,422 INFO L175 Difference]: Start difference. First operand has 35 places, 26 transitions, 99 flow. Second operand 4 states and 391 transitions. [2023-09-01 12:44:59,422 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 36 places, 42 transitions, 248 flow [2023-09-01 12:44:59,423 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 33 places, 42 transitions, 233 flow, removed 3 selfloop flow, removed 3 redundant places. [2023-09-01 12:44:59,424 INFO L231 Difference]: Finished difference. Result has 35 places, 29 transitions, 124 flow [2023-09-01 12:44:59,424 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=188, PETRI_DIFFERENCE_MINUEND_FLOW=91, PETRI_DIFFERENCE_MINUEND_PLACES=30, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=26, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=22, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=124, PETRI_PLACES=35, PETRI_TRANSITIONS=29} [2023-09-01 12:44:59,425 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 5 predicate places. [2023-09-01 12:44:59,425 INFO L495 AbstractCegarLoop]: Abstraction has has 35 places, 29 transitions, 124 flow [2023-09-01 12:44:59,425 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 93.25) internal successors, (373), 4 states have internal predecessors, (373), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 12:44:59,426 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 12:44:59,426 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 12:44:59,426 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-09-01 12:44:59,426 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-09-01 12:44:59,428 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 12:44:59,428 INFO L85 PathProgramCache]: Analyzing trace with hash 2127314941, now seen corresponding path program 3 times [2023-09-01 12:44:59,428 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 12:44:59,429 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1130254505] [2023-09-01 12:44:59,429 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 12:44:59,429 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 12:44:59,462 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 12:44:59,554 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 12:44:59,554 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 12:44:59,554 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1130254505] [2023-09-01 12:44:59,554 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1130254505] provided 1 perfect and 0 imperfect interpolant sequences [2023-09-01 12:44:59,554 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-09-01 12:44:59,555 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-09-01 12:44:59,555 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1903854028] [2023-09-01 12:44:59,555 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-09-01 12:44:59,555 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-09-01 12:44:59,555 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 12:44:59,556 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-09-01 12:44:59,556 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-09-01 12:44:59,577 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 88 out of 188 [2023-09-01 12:44:59,578 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 35 places, 29 transitions, 124 flow. Second operand has 4 states, 4 states have (on average 92.25) internal successors, (369), 4 states have internal predecessors, (369), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 12:44:59,578 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 12:44:59,578 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 88 of 188 [2023-09-01 12:44:59,578 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 12:44:59,655 INFO L130 PetriNetUnfolder]: 162/285 cut-off events. [2023-09-01 12:44:59,655 INFO L131 PetriNetUnfolder]: For 448/464 co-relation queries the response was YES. [2023-09-01 12:44:59,656 INFO L83 FinitePrefix]: Finished finitePrefix Result has 985 conditions, 285 events. 162/285 cut-off events. For 448/464 co-relation queries the response was YES. Maximal size of possible extension queue 25. Compared 970 event pairs, 17 based on Foata normal form. 52/335 useless extension candidates. Maximal degree in co-relation 870. Up to 117 conditions per place. [2023-09-01 12:44:59,657 INFO L137 encePairwiseOnDemand]: 182/188 looper letters, 33 selfloop transitions, 7 changer transitions 6/49 dead transitions. [2023-09-01 12:44:59,657 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 39 places, 49 transitions, 318 flow [2023-09-01 12:44:59,657 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-09-01 12:44:59,657 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-09-01 12:44:59,658 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 478 transitions. [2023-09-01 12:44:59,658 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5085106382978724 [2023-09-01 12:44:59,658 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 478 transitions. [2023-09-01 12:44:59,659 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 478 transitions. [2023-09-01 12:44:59,659 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 12:44:59,659 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 478 transitions. [2023-09-01 12:44:59,660 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 95.6) internal successors, (478), 5 states have internal predecessors, (478), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 12:44:59,661 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 188.0) internal successors, (1128), 6 states have internal predecessors, (1128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 12:44:59,661 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 188.0) internal successors, (1128), 6 states have internal predecessors, (1128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 12:44:59,661 INFO L175 Difference]: Start difference. First operand has 35 places, 29 transitions, 124 flow. Second operand 5 states and 478 transitions. [2023-09-01 12:44:59,661 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 39 places, 49 transitions, 318 flow [2023-09-01 12:44:59,664 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 38 places, 49 transitions, 310 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-09-01 12:44:59,665 INFO L231 Difference]: Finished difference. Result has 42 places, 30 transitions, 160 flow [2023-09-01 12:44:59,665 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=188, PETRI_DIFFERENCE_MINUEND_FLOW=119, PETRI_DIFFERENCE_MINUEND_PLACES=34, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=29, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=23, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=160, PETRI_PLACES=42, PETRI_TRANSITIONS=30} [2023-09-01 12:44:59,666 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 12 predicate places. [2023-09-01 12:44:59,668 INFO L495 AbstractCegarLoop]: Abstraction has has 42 places, 30 transitions, 160 flow [2023-09-01 12:44:59,668 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 92.25) internal successors, (369), 4 states have internal predecessors, (369), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 12:44:59,668 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 12:44:59,669 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 12:44:59,669 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-09-01 12:44:59,669 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-09-01 12:44:59,669 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 12:44:59,669 INFO L85 PathProgramCache]: Analyzing trace with hash 1776338007, now seen corresponding path program 1 times [2023-09-01 12:44:59,669 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 12:44:59,669 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [455043001] [2023-09-01 12:44:59,669 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 12:44:59,670 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 12:44:59,708 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 12:44:59,840 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 12:44:59,840 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 12:44:59,840 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [455043001] [2023-09-01 12:44:59,840 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [455043001] provided 0 perfect and 1 imperfect interpolant sequences [2023-09-01 12:44:59,840 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1222154117] [2023-09-01 12:44:59,840 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 12:44:59,840 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 12:44:59,840 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-09-01 12:44:59,842 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 12:44:59,878 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 12:44:59,912 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 12:44:59,913 INFO L263 TraceCheckSpWp]: Trace formula consists of 154 conjuncts, 11 conjunts are in the unsatisfiable core [2023-09-01 12:44:59,916 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 12:45:00,036 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 12:45:00,038 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-09-01 12:45:00,220 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 12:45:00,220 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1222154117] provided 0 perfect and 2 imperfect interpolant sequences [2023-09-01 12:45:00,221 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-09-01 12:45:00,221 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 11 [2023-09-01 12:45:00,221 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2102741621] [2023-09-01 12:45:00,221 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-09-01 12:45:00,222 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-09-01 12:45:00,222 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 12:45:00,223 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-09-01 12:45:00,226 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=100, Unknown=0, NotChecked=0, Total=132 [2023-09-01 12:45:00,275 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 84 out of 188 [2023-09-01 12:45:00,276 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 42 places, 30 transitions, 160 flow. Second operand has 12 states, 12 states have (on average 87.16666666666667) internal successors, (1046), 12 states have internal predecessors, (1046), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 12:45:00,276 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 12:45:00,276 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 84 of 188 [2023-09-01 12:45:00,276 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 12:45:00,644 INFO L130 PetriNetUnfolder]: 422/744 cut-off events. [2023-09-01 12:45:00,645 INFO L131 PetriNetUnfolder]: For 2779/2834 co-relation queries the response was YES. [2023-09-01 12:45:00,646 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3011 conditions, 744 events. 422/744 cut-off events. For 2779/2834 co-relation queries the response was YES. Maximal size of possible extension queue 59. Compared 3406 event pairs, 18 based on Foata normal form. 95/828 useless extension candidates. Maximal degree in co-relation 1802. Up to 321 conditions per place. [2023-09-01 12:45:00,649 INFO L137 encePairwiseOnDemand]: 181/188 looper letters, 81 selfloop transitions, 33 changer transitions 39/157 dead transitions. [2023-09-01 12:45:00,649 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 60 places, 157 transitions, 1189 flow [2023-09-01 12:45:00,649 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2023-09-01 12:45:00,649 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2023-09-01 12:45:00,652 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 1910 transitions. [2023-09-01 12:45:00,653 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4837892603850051 [2023-09-01 12:45:00,653 INFO L72 ComplementDD]: Start complementDD. Operand 21 states and 1910 transitions. [2023-09-01 12:45:00,653 INFO L73 IsDeterministic]: Start isDeterministic. Operand 21 states and 1910 transitions. [2023-09-01 12:45:00,654 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 12:45:00,654 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 21 states and 1910 transitions. [2023-09-01 12:45:00,657 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 22 states, 21 states have (on average 90.95238095238095) internal successors, (1910), 21 states have internal predecessors, (1910), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 12:45:00,668 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 22 states, 22 states have (on average 188.0) internal successors, (4136), 22 states have internal predecessors, (4136), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 12:45:00,669 INFO L81 ComplementDD]: Finished complementDD. Result has 22 states, 22 states have (on average 188.0) internal successors, (4136), 22 states have internal predecessors, (4136), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 12:45:00,669 INFO L175 Difference]: Start difference. First operand has 42 places, 30 transitions, 160 flow. Second operand 21 states and 1910 transitions. [2023-09-01 12:45:00,669 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 60 places, 157 transitions, 1189 flow [2023-09-01 12:45:00,671 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 59 places, 157 transitions, 1181 flow, removed 4 selfloop flow, removed 1 redundant places. [2023-09-01 12:45:00,673 INFO L231 Difference]: Finished difference. Result has 68 places, 61 transitions, 550 flow [2023-09-01 12:45:00,673 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=188, PETRI_DIFFERENCE_MINUEND_FLOW=152, PETRI_DIFFERENCE_MINUEND_PLACES=39, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=30, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=19, PETRI_DIFFERENCE_SUBTRAHEND_STATES=21, PETRI_FLOW=550, PETRI_PLACES=68, PETRI_TRANSITIONS=61} [2023-09-01 12:45:00,673 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 38 predicate places. [2023-09-01 12:45:00,673 INFO L495 AbstractCegarLoop]: Abstraction has has 68 places, 61 transitions, 550 flow [2023-09-01 12:45:00,674 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 87.16666666666667) internal successors, (1046), 12 states have internal predecessors, (1046), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 12:45:00,674 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 12:45:00,674 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 12:45:00,684 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 12:45:00,884 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 12:45:00,884 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-09-01 12:45:00,885 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 12:45:00,885 INFO L85 PathProgramCache]: Analyzing trace with hash -2050961286, now seen corresponding path program 1 times [2023-09-01 12:45:00,885 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 12:45:00,885 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [16503489] [2023-09-01 12:45:00,885 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 12:45:00,885 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 12:45:00,903 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 12:45:01,073 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 12:45:01,074 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 12:45:01,074 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [16503489] [2023-09-01 12:45:01,074 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [16503489] provided 0 perfect and 1 imperfect interpolant sequences [2023-09-01 12:45:01,074 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [617049964] [2023-09-01 12:45:01,074 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 12:45:01,074 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 12:45:01,074 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-09-01 12:45:01,075 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 12:45:01,119 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 12:45:01,158 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 12:45:01,159 INFO L263 TraceCheckSpWp]: Trace formula consists of 154 conjuncts, 11 conjunts are in the unsatisfiable core [2023-09-01 12:45:01,161 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 12:45:01,285 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 12:45:01,285 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-09-01 12:45:01,440 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 12:45:01,440 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [617049964] provided 0 perfect and 2 imperfect interpolant sequences [2023-09-01 12:45:01,440 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-09-01 12:45:01,440 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 10 [2023-09-01 12:45:01,440 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1143376412] [2023-09-01 12:45:01,440 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-09-01 12:45:01,441 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2023-09-01 12:45:01,441 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 12:45:01,441 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2023-09-01 12:45:01,443 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2023-09-01 12:45:01,487 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 84 out of 188 [2023-09-01 12:45:01,487 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 68 places, 61 transitions, 550 flow. Second operand has 11 states, 11 states have (on average 87.18181818181819) internal successors, (959), 11 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 12:45:01,487 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 12:45:01,488 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 84 of 188 [2023-09-01 12:45:01,488 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 12:45:01,799 INFO L130 PetriNetUnfolder]: 430/740 cut-off events. [2023-09-01 12:45:01,799 INFO L131 PetriNetUnfolder]: For 5633/5645 co-relation queries the response was YES. [2023-09-01 12:45:01,801 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3756 conditions, 740 events. 430/740 cut-off events. For 5633/5645 co-relation queries the response was YES. Maximal size of possible extension queue 51. Compared 3145 event pairs, 8 based on Foata normal form. 44/779 useless extension candidates. Maximal degree in co-relation 2681. Up to 327 conditions per place. [2023-09-01 12:45:01,804 INFO L137 encePairwiseOnDemand]: 181/188 looper letters, 61 selfloop transitions, 25 changer transitions 64/156 dead transitions. [2023-09-01 12:45:01,804 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 78 places, 156 transitions, 1510 flow [2023-09-01 12:45:01,804 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2023-09-01 12:45:01,804 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2023-09-01 12:45:01,806 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 1546 transitions. [2023-09-01 12:45:01,807 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.483729662077597 [2023-09-01 12:45:01,807 INFO L72 ComplementDD]: Start complementDD. Operand 17 states and 1546 transitions. [2023-09-01 12:45:01,807 INFO L73 IsDeterministic]: Start isDeterministic. Operand 17 states and 1546 transitions. [2023-09-01 12:45:01,808 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 12:45:01,808 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 17 states and 1546 transitions. [2023-09-01 12:45:01,810 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 18 states, 17 states have (on average 90.94117647058823) internal successors, (1546), 17 states have internal predecessors, (1546), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 12:45:01,813 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 18 states, 18 states have (on average 188.0) internal successors, (3384), 18 states have internal predecessors, (3384), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 12:45:01,814 INFO L81 ComplementDD]: Finished complementDD. Result has 18 states, 18 states have (on average 188.0) internal successors, (3384), 18 states have internal predecessors, (3384), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 12:45:01,814 INFO L175 Difference]: Start difference. First operand has 68 places, 61 transitions, 550 flow. Second operand 17 states and 1546 transitions. [2023-09-01 12:45:01,814 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 78 places, 156 transitions, 1510 flow [2023-09-01 12:45:01,823 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 68 places, 156 transitions, 1138 flow, removed 174 selfloop flow, removed 10 redundant places. [2023-09-01 12:45:01,824 INFO L231 Difference]: Finished difference. Result has 73 places, 56 transitions, 403 flow [2023-09-01 12:45:01,824 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=188, PETRI_DIFFERENCE_MINUEND_FLOW=364, PETRI_DIFFERENCE_MINUEND_PLACES=52, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=61, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=16, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=40, PETRI_DIFFERENCE_SUBTRAHEND_STATES=17, PETRI_FLOW=403, PETRI_PLACES=73, PETRI_TRANSITIONS=56} [2023-09-01 12:45:01,825 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 43 predicate places. [2023-09-01 12:45:01,825 INFO L495 AbstractCegarLoop]: Abstraction has has 73 places, 56 transitions, 403 flow [2023-09-01 12:45:01,826 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 87.18181818181819) internal successors, (959), 11 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 12:45:01,826 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 12:45:01,826 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 12:45:01,833 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-09-01 12:45:02,031 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 12:45:02,031 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-09-01 12:45:02,032 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 12:45:02,032 INFO L85 PathProgramCache]: Analyzing trace with hash 1700482413, now seen corresponding path program 2 times [2023-09-01 12:45:02,032 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 12:45:02,032 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [364350643] [2023-09-01 12:45:02,032 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 12:45:02,032 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 12:45:02,082 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 12:45:02,388 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 12:45:02,388 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 12:45:02,388 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [364350643] [2023-09-01 12:45:02,389 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [364350643] provided 0 perfect and 1 imperfect interpolant sequences [2023-09-01 12:45:02,389 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [264808749] [2023-09-01 12:45:02,389 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-09-01 12:45:02,389 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 12:45:02,389 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-09-01 12:45:02,393 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 12:45:02,397 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 12:45:02,467 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-09-01 12:45:02,467 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-09-01 12:45:02,468 INFO L263 TraceCheckSpWp]: Trace formula consists of 162 conjuncts, 13 conjunts are in the unsatisfiable core [2023-09-01 12:45:02,470 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 12:45:02,650 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 12:45:02,650 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-09-01 12:45:02,990 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 12:45:02,990 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [264808749] provided 0 perfect and 2 imperfect interpolant sequences [2023-09-01 12:45:02,991 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-09-01 12:45:02,992 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 17 [2023-09-01 12:45:02,992 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1444515352] [2023-09-01 12:45:02,992 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-09-01 12:45:02,992 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2023-09-01 12:45:02,993 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 12:45:02,993 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2023-09-01 12:45:02,994 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=238, Unknown=0, NotChecked=0, Total=306 [2023-09-01 12:45:03,059 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 84 out of 188 [2023-09-01 12:45:03,060 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 73 places, 56 transitions, 403 flow. Second operand has 18 states, 18 states have (on average 86.61111111111111) internal successors, (1559), 18 states have internal predecessors, (1559), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 12:45:03,060 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 12:45:03,060 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 84 of 188 [2023-09-01 12:45:03,061 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 12:45:04,118 INFO L130 PetriNetUnfolder]: 830/1452 cut-off events. [2023-09-01 12:45:04,119 INFO L131 PetriNetUnfolder]: For 8077/8186 co-relation queries the response was YES. [2023-09-01 12:45:04,122 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7061 conditions, 1452 events. 830/1452 cut-off events. For 8077/8186 co-relation queries the response was YES. Maximal size of possible extension queue 94. Compared 7349 event pairs, 22 based on Foata normal form. 127/1541 useless extension candidates. Maximal degree in co-relation 6285. Up to 596 conditions per place. [2023-09-01 12:45:04,127 INFO L137 encePairwiseOnDemand]: 181/188 looper letters, 138 selfloop transitions, 65 changer transitions 100/309 dead transitions. [2023-09-01 12:45:04,127 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 101 places, 309 transitions, 2906 flow [2023-09-01 12:45:04,127 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2023-09-01 12:45:04,127 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 39 states. [2023-09-01 12:45:04,132 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 3538 transitions. [2023-09-01 12:45:04,133 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.48254228041462083 [2023-09-01 12:45:04,133 INFO L72 ComplementDD]: Start complementDD. Operand 39 states and 3538 transitions. [2023-09-01 12:45:04,133 INFO L73 IsDeterministic]: Start isDeterministic. Operand 39 states and 3538 transitions. [2023-09-01 12:45:04,135 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 12:45:04,135 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 39 states and 3538 transitions. [2023-09-01 12:45:04,140 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 40 states, 39 states have (on average 90.71794871794872) internal successors, (3538), 39 states have internal predecessors, (3538), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 12:45:04,146 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 40 states, 40 states have (on average 188.0) internal successors, (7520), 40 states have internal predecessors, (7520), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 12:45:04,147 INFO L81 ComplementDD]: Finished complementDD. Result has 40 states, 40 states have (on average 188.0) internal successors, (7520), 40 states have internal predecessors, (7520), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 12:45:04,147 INFO L175 Difference]: Start difference. First operand has 73 places, 56 transitions, 403 flow. Second operand 39 states and 3538 transitions. [2023-09-01 12:45:04,147 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 101 places, 309 transitions, 2906 flow [2023-09-01 12:45:04,162 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 89 places, 309 transitions, 2466 flow, removed 167 selfloop flow, removed 12 redundant places. [2023-09-01 12:45:04,165 INFO L231 Difference]: Finished difference. Result has 96 places, 98 transitions, 869 flow [2023-09-01 12:45:04,165 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=188, PETRI_DIFFERENCE_MINUEND_FLOW=333, PETRI_DIFFERENCE_MINUEND_PLACES=51, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=56, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=30, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=26, PETRI_DIFFERENCE_SUBTRAHEND_STATES=39, PETRI_FLOW=869, PETRI_PLACES=96, PETRI_TRANSITIONS=98} [2023-09-01 12:45:04,165 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 66 predicate places. [2023-09-01 12:45:04,165 INFO L495 AbstractCegarLoop]: Abstraction has has 96 places, 98 transitions, 869 flow [2023-09-01 12:45:04,166 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 86.61111111111111) internal successors, (1559), 18 states have internal predecessors, (1559), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 12:45:04,166 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 12:45:04,166 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 12:45:04,173 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 12:45:04,370 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 12:45:04,371 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-09-01 12:45:04,371 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 12:45:04,371 INFO L85 PathProgramCache]: Analyzing trace with hash -1615993566, now seen corresponding path program 1 times [2023-09-01 12:45:04,371 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 12:45:04,372 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [888143701] [2023-09-01 12:45:04,372 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 12:45:04,372 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 12:45:04,400 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 12:45:04,621 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 12:45:04,621 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 12:45:04,621 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [888143701] [2023-09-01 12:45:04,621 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [888143701] provided 0 perfect and 1 imperfect interpolant sequences [2023-09-01 12:45:04,621 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1979112890] [2023-09-01 12:45:04,622 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 12:45:04,622 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 12:45:04,622 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-09-01 12:45:04,623 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 12:45:04,625 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 12:45:04,683 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 12:45:04,686 INFO L263 TraceCheckSpWp]: Trace formula consists of 162 conjuncts, 13 conjunts are in the unsatisfiable core [2023-09-01 12:45:04,688 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 12:45:04,816 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 12:45:04,816 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-09-01 12:45:05,223 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 12:45:05,223 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1979112890] provided 0 perfect and 2 imperfect interpolant sequences [2023-09-01 12:45:05,223 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-09-01 12:45:05,223 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 18 [2023-09-01 12:45:05,223 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [973001603] [2023-09-01 12:45:05,224 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-09-01 12:45:05,224 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2023-09-01 12:45:05,224 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 12:45:05,225 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2023-09-01 12:45:05,225 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=265, Unknown=0, NotChecked=0, Total=342 [2023-09-01 12:45:05,291 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 82 out of 188 [2023-09-01 12:45:05,293 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 96 places, 98 transitions, 869 flow. Second operand has 19 states, 19 states have (on average 84.57894736842105) internal successors, (1607), 19 states have internal predecessors, (1607), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 12:45:05,293 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 12:45:05,293 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 82 of 188 [2023-09-01 12:45:05,293 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 12:45:06,465 INFO L130 PetriNetUnfolder]: 1005/1811 cut-off events. [2023-09-01 12:45:06,466 INFO L131 PetriNetUnfolder]: For 10765/10800 co-relation queries the response was YES. [2023-09-01 12:45:06,470 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8782 conditions, 1811 events. 1005/1811 cut-off events. For 10765/10800 co-relation queries the response was YES. Maximal size of possible extension queue 117. Compared 9749 event pairs, 0 based on Foata normal form. 93/1896 useless extension candidates. Maximal degree in co-relation 8198. Up to 655 conditions per place. [2023-09-01 12:45:06,476 INFO L137 encePairwiseOnDemand]: 181/188 looper letters, 148 selfloop transitions, 90 changer transitions 117/363 dead transitions. [2023-09-01 12:45:06,476 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 120 places, 363 transitions, 3442 flow [2023-09-01 12:45:06,476 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2023-09-01 12:45:06,476 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 39 states. [2023-09-01 12:45:06,481 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 3468 transitions. [2023-09-01 12:45:06,482 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.47299509001636664 [2023-09-01 12:45:06,483 INFO L72 ComplementDD]: Start complementDD. Operand 39 states and 3468 transitions. [2023-09-01 12:45:06,483 INFO L73 IsDeterministic]: Start isDeterministic. Operand 39 states and 3468 transitions. [2023-09-01 12:45:06,484 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 12:45:06,484 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 39 states and 3468 transitions. [2023-09-01 12:45:06,491 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 40 states, 39 states have (on average 88.92307692307692) internal successors, (3468), 39 states have internal predecessors, (3468), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 12:45:06,497 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 40 states, 40 states have (on average 188.0) internal successors, (7520), 40 states have internal predecessors, (7520), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 12:45:06,498 INFO L81 ComplementDD]: Finished complementDD. Result has 40 states, 40 states have (on average 188.0) internal successors, (7520), 40 states have internal predecessors, (7520), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 12:45:06,498 INFO L175 Difference]: Start difference. First operand has 96 places, 98 transitions, 869 flow. Second operand 39 states and 3468 transitions. [2023-09-01 12:45:06,498 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 120 places, 363 transitions, 3442 flow [2023-09-01 12:45:06,534 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 106 places, 363 transitions, 2686 flow, removed 331 selfloop flow, removed 14 redundant places. [2023-09-01 12:45:06,538 INFO L231 Difference]: Finished difference. Result has 119 places, 134 transitions, 1268 flow [2023-09-01 12:45:06,538 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=188, PETRI_DIFFERENCE_MINUEND_FLOW=639, PETRI_DIFFERENCE_MINUEND_PLACES=68, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=98, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=47, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=42, PETRI_DIFFERENCE_SUBTRAHEND_STATES=39, PETRI_FLOW=1268, PETRI_PLACES=119, PETRI_TRANSITIONS=134} [2023-09-01 12:45:06,538 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 89 predicate places. [2023-09-01 12:45:06,538 INFO L495 AbstractCegarLoop]: Abstraction has has 119 places, 134 transitions, 1268 flow [2023-09-01 12:45:06,539 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 84.57894736842105) internal successors, (1607), 19 states have internal predecessors, (1607), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 12:45:06,539 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 12:45:06,539 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 12:45:06,547 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 12:45:06,742 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 12:45:06,742 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-09-01 12:45:06,743 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 12:45:06,743 INFO L85 PathProgramCache]: Analyzing trace with hash -1081110094, now seen corresponding path program 2 times [2023-09-01 12:45:06,743 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 12:45:06,743 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [119979960] [2023-09-01 12:45:06,743 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 12:45:06,743 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 12:45:06,771 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 12:45:06,968 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 12:45:06,968 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 12:45:06,970 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [119979960] [2023-09-01 12:45:06,971 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [119979960] provided 0 perfect and 1 imperfect interpolant sequences [2023-09-01 12:45:06,971 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [881369723] [2023-09-01 12:45:06,971 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-09-01 12:45:06,971 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 12:45:06,971 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-09-01 12:45:06,973 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 12:45:07,000 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 12:45:07,051 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-09-01 12:45:07,051 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-09-01 12:45:07,052 INFO L263 TraceCheckSpWp]: Trace formula consists of 162 conjuncts, 13 conjunts are in the unsatisfiable core [2023-09-01 12:45:07,054 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 12:45:07,163 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 12:45:07,163 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-09-01 12:45:07,556 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 12:45:07,556 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [881369723] provided 0 perfect and 2 imperfect interpolant sequences [2023-09-01 12:45:07,556 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-09-01 12:45:07,556 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 17 [2023-09-01 12:45:07,557 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [700670297] [2023-09-01 12:45:07,557 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-09-01 12:45:07,557 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2023-09-01 12:45:07,557 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 12:45:07,558 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2023-09-01 12:45:07,558 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=240, Unknown=0, NotChecked=0, Total=306 [2023-09-01 12:45:07,629 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 79 out of 188 [2023-09-01 12:45:07,630 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 119 places, 134 transitions, 1268 flow. Second operand has 18 states, 18 states have (on average 82.05555555555556) internal successors, (1477), 18 states have internal predecessors, (1477), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 12:45:07,630 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 12:45:07,630 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 79 of 188 [2023-09-01 12:45:07,630 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 12:45:09,322 INFO L130 PetriNetUnfolder]: 1731/2800 cut-off events. [2023-09-01 12:45:09,322 INFO L131 PetriNetUnfolder]: For 13061/13061 co-relation queries the response was YES. [2023-09-01 12:45:09,330 INFO L83 FinitePrefix]: Finished finitePrefix Result has 13074 conditions, 2800 events. 1731/2800 cut-off events. For 13061/13061 co-relation queries the response was YES. Maximal size of possible extension queue 122. Compared 13588 event pairs, 41 based on Foata normal form. 144/2944 useless extension candidates. Maximal degree in co-relation 12547. Up to 691 conditions per place. [2023-09-01 12:45:09,341 INFO L137 encePairwiseOnDemand]: 179/188 looper letters, 188 selfloop transitions, 93 changer transitions 187/468 dead transitions. [2023-09-01 12:45:09,341 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 153 places, 468 transitions, 4641 flow [2023-09-01 12:45:09,341 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2023-09-01 12:45:09,341 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 51 states. [2023-09-01 12:45:09,345 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 4376 transitions. [2023-09-01 12:45:09,346 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45640383813099705 [2023-09-01 12:45:09,346 INFO L72 ComplementDD]: Start complementDD. Operand 51 states and 4376 transitions. [2023-09-01 12:45:09,347 INFO L73 IsDeterministic]: Start isDeterministic. Operand 51 states and 4376 transitions. [2023-09-01 12:45:09,348 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 12:45:09,348 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 51 states and 4376 transitions. [2023-09-01 12:45:09,353 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 52 states, 51 states have (on average 85.80392156862744) internal successors, (4376), 51 states have internal predecessors, (4376), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 12:45:09,360 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 52 states, 52 states have (on average 188.0) internal successors, (9776), 52 states have internal predecessors, (9776), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 12:45:09,361 INFO L81 ComplementDD]: Finished complementDD. Result has 52 states, 52 states have (on average 188.0) internal successors, (9776), 52 states have internal predecessors, (9776), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 12:45:09,362 INFO L175 Difference]: Start difference. First operand has 119 places, 134 transitions, 1268 flow. Second operand 51 states and 4376 transitions. [2023-09-01 12:45:09,362 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 153 places, 468 transitions, 4641 flow [2023-09-01 12:45:09,408 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 131 places, 468 transitions, 4056 flow, removed 175 selfloop flow, removed 22 redundant places. [2023-09-01 12:45:09,412 INFO L231 Difference]: Finished difference. Result has 163 places, 161 transitions, 1686 flow [2023-09-01 12:45:09,412 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=188, PETRI_DIFFERENCE_MINUEND_FLOW=993, PETRI_DIFFERENCE_MINUEND_PLACES=81, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=134, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=66, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=62, PETRI_DIFFERENCE_SUBTRAHEND_STATES=51, PETRI_FLOW=1686, PETRI_PLACES=163, PETRI_TRANSITIONS=161} [2023-09-01 12:45:09,412 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 133 predicate places. [2023-09-01 12:45:09,412 INFO L495 AbstractCegarLoop]: Abstraction has has 163 places, 161 transitions, 1686 flow [2023-09-01 12:45:09,413 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 82.05555555555556) internal successors, (1477), 18 states have internal predecessors, (1477), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 12:45:09,413 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 12:45:09,413 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 12:45:09,423 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 12:45:09,619 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 12:45:09,620 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-09-01 12:45:09,620 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 12:45:09,621 INFO L85 PathProgramCache]: Analyzing trace with hash 364047418, now seen corresponding path program 2 times [2023-09-01 12:45:09,621 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 12:45:09,621 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [135589834] [2023-09-01 12:45:09,621 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 12:45:09,621 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 12:45:09,651 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 12:45:09,875 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 5 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 12:45:09,876 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 12:45:09,876 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [135589834] [2023-09-01 12:45:09,876 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [135589834] provided 0 perfect and 1 imperfect interpolant sequences [2023-09-01 12:45:09,876 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [316465819] [2023-09-01 12:45:09,876 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-09-01 12:45:09,876 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 12:45:09,876 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-09-01 12:45:09,881 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 12:45:09,883 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 12:45:09,956 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-09-01 12:45:09,956 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-09-01 12:45:09,957 INFO L263 TraceCheckSpWp]: Trace formula consists of 162 conjuncts, 13 conjunts are in the unsatisfiable core [2023-09-01 12:45:09,960 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 12:45:10,101 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 12:45:10,102 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-09-01 12:45:10,436 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 12:45:10,436 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [316465819] provided 0 perfect and 2 imperfect interpolant sequences [2023-09-01 12:45:10,436 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-09-01 12:45:10,436 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 16 [2023-09-01 12:45:10,437 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1713390251] [2023-09-01 12:45:10,437 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-09-01 12:45:10,437 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2023-09-01 12:45:10,437 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 12:45:10,438 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2023-09-01 12:45:10,438 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=212, Unknown=0, NotChecked=0, Total=272 [2023-09-01 12:45:10,524 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 81 out of 188 [2023-09-01 12:45:10,525 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 163 places, 161 transitions, 1686 flow. Second operand has 17 states, 17 states have (on average 84.29411764705883) internal successors, (1433), 17 states have internal predecessors, (1433), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 12:45:10,525 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 12:45:10,525 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 81 of 188 [2023-09-01 12:45:10,525 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 12:45:12,114 INFO L130 PetriNetUnfolder]: 2002/3239 cut-off events. [2023-09-01 12:45:12,114 INFO L131 PetriNetUnfolder]: For 48926/48926 co-relation queries the response was YES. [2023-09-01 12:45:12,126 INFO L83 FinitePrefix]: Finished finitePrefix Result has 18451 conditions, 3239 events. 2002/3239 cut-off events. For 48926/48926 co-relation queries the response was YES. Maximal size of possible extension queue 114. Compared 16164 event pairs, 59 based on Foata normal form. 104/3343 useless extension candidates. Maximal degree in co-relation 17317. Up to 1026 conditions per place. [2023-09-01 12:45:12,138 INFO L137 encePairwiseOnDemand]: 178/188 looper letters, 212 selfloop transitions, 93 changer transitions 165/470 dead transitions. [2023-09-01 12:45:12,138 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 183 places, 470 transitions, 5842 flow [2023-09-01 12:45:12,138 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2023-09-01 12:45:12,138 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 49 states. [2023-09-01 12:45:12,141 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 4302 transitions. [2023-09-01 12:45:12,142 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46699956578376034 [2023-09-01 12:45:12,142 INFO L72 ComplementDD]: Start complementDD. Operand 49 states and 4302 transitions. [2023-09-01 12:45:12,142 INFO L73 IsDeterministic]: Start isDeterministic. Operand 49 states and 4302 transitions. [2023-09-01 12:45:12,143 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 12:45:12,143 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 49 states and 4302 transitions. [2023-09-01 12:45:12,147 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 50 states, 49 states have (on average 87.79591836734694) internal successors, (4302), 49 states have internal predecessors, (4302), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 12:45:12,152 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 50 states, 50 states have (on average 188.0) internal successors, (9400), 50 states have internal predecessors, (9400), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 12:45:12,153 INFO L81 ComplementDD]: Finished complementDD. Result has 50 states, 50 states have (on average 188.0) internal successors, (9400), 50 states have internal predecessors, (9400), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 12:45:12,153 INFO L175 Difference]: Start difference. First operand has 163 places, 161 transitions, 1686 flow. Second operand 49 states and 4302 transitions. [2023-09-01 12:45:12,154 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 183 places, 470 transitions, 5842 flow [2023-09-01 12:45:12,291 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 155 places, 470 transitions, 4865 flow, removed 471 selfloop flow, removed 28 redundant places. [2023-09-01 12:45:12,297 INFO L231 Difference]: Finished difference. Result has 184 places, 198 transitions, 2215 flow [2023-09-01 12:45:12,299 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=188, PETRI_DIFFERENCE_MINUEND_FLOW=1423, PETRI_DIFFERENCE_MINUEND_PLACES=107, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=161, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=65, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=94, PETRI_DIFFERENCE_SUBTRAHEND_STATES=49, PETRI_FLOW=2215, PETRI_PLACES=184, PETRI_TRANSITIONS=198} [2023-09-01 12:45:12,299 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 154 predicate places. [2023-09-01 12:45:12,300 INFO L495 AbstractCegarLoop]: Abstraction has has 184 places, 198 transitions, 2215 flow [2023-09-01 12:45:12,300 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 84.29411764705883) internal successors, (1433), 17 states have internal predecessors, (1433), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 12:45:12,300 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 12:45:12,301 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 12:45:12,324 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 12:45:12,501 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 12:45:12,501 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-09-01 12:45:12,502 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 12:45:12,502 INFO L85 PathProgramCache]: Analyzing trace with hash 563170391, now seen corresponding path program 3 times [2023-09-01 12:45:12,502 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 12:45:12,502 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [826659768] [2023-09-01 12:45:12,502 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 12:45:12,502 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 12:45:12,523 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 12:45:12,809 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 3 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 12:45:12,810 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 12:45:12,810 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [826659768] [2023-09-01 12:45:12,810 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [826659768] provided 0 perfect and 1 imperfect interpolant sequences [2023-09-01 12:45:12,810 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [269913176] [2023-09-01 12:45:12,810 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-09-01 12:45:12,810 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 12:45:12,810 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-09-01 12:45:12,811 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 12:45:12,813 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 12:45:12,883 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2023-09-01 12:45:12,883 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-09-01 12:45:12,884 INFO L263 TraceCheckSpWp]: Trace formula consists of 166 conjuncts, 14 conjunts are in the unsatisfiable core [2023-09-01 12:45:12,886 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 12:45:13,078 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 3 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 12:45:13,078 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-09-01 12:45:13,780 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 3 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 12:45:13,780 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [269913176] provided 0 perfect and 2 imperfect interpolant sequences [2023-09-01 12:45:13,780 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-09-01 12:45:13,780 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 20 [2023-09-01 12:45:13,780 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [896457778] [2023-09-01 12:45:13,780 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-09-01 12:45:13,781 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2023-09-01 12:45:13,781 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 12:45:13,781 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2023-09-01 12:45:13,781 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=88, Invalid=332, Unknown=0, NotChecked=0, Total=420 [2023-09-01 12:45:13,874 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 82 out of 188 [2023-09-01 12:45:13,875 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 184 places, 198 transitions, 2215 flow. Second operand has 21 states, 21 states have (on average 84.61904761904762) internal successors, (1777), 21 states have internal predecessors, (1777), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 12:45:13,875 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 12:45:13,875 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 82 of 188 [2023-09-01 12:45:13,876 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 12:45:16,221 INFO L130 PetriNetUnfolder]: 1898/3370 cut-off events. [2023-09-01 12:45:16,221 INFO L131 PetriNetUnfolder]: For 111673/111990 co-relation queries the response was YES. [2023-09-01 12:45:16,236 INFO L83 FinitePrefix]: Finished finitePrefix Result has 25623 conditions, 3370 events. 1898/3370 cut-off events. For 111673/111990 co-relation queries the response was YES. Maximal size of possible extension queue 199. Compared 20375 event pairs, 8 based on Foata normal form. 219/3537 useless extension candidates. Maximal degree in co-relation 24101. Up to 881 conditions per place. [2023-09-01 12:45:16,250 INFO L137 encePairwiseOnDemand]: 181/188 looper letters, 247 selfloop transitions, 152 changer transitions 143/558 dead transitions. [2023-09-01 12:45:16,250 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 207 places, 558 transitions, 8423 flow [2023-09-01 12:45:16,250 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 52 states. [2023-09-01 12:45:16,250 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 52 states. [2023-09-01 12:45:16,253 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 4601 transitions. [2023-09-01 12:45:16,254 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.47064238952536824 [2023-09-01 12:45:16,254 INFO L72 ComplementDD]: Start complementDD. Operand 52 states and 4601 transitions. [2023-09-01 12:45:16,254 INFO L73 IsDeterministic]: Start isDeterministic. Operand 52 states and 4601 transitions. [2023-09-01 12:45:16,255 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 12:45:16,255 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 52 states and 4601 transitions. [2023-09-01 12:45:16,259 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 53 states, 52 states have (on average 88.48076923076923) internal successors, (4601), 52 states have internal predecessors, (4601), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 12:45:16,265 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 53 states, 53 states have (on average 188.0) internal successors, (9964), 53 states have internal predecessors, (9964), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 12:45:16,266 INFO L81 ComplementDD]: Finished complementDD. Result has 53 states, 53 states have (on average 188.0) internal successors, (9964), 53 states have internal predecessors, (9964), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 12:45:16,266 INFO L175 Difference]: Start difference. First operand has 184 places, 198 transitions, 2215 flow. Second operand 52 states and 4601 transitions. [2023-09-01 12:45:16,266 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 207 places, 558 transitions, 8423 flow [2023-09-01 12:45:16,395 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 176 places, 558 transitions, 6626 flow, removed 882 selfloop flow, removed 31 redundant places. [2023-09-01 12:45:16,399 INFO L231 Difference]: Finished difference. Result has 188 places, 271 transitions, 3342 flow [2023-09-01 12:45:16,399 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=188, PETRI_DIFFERENCE_MINUEND_FLOW=1878, PETRI_DIFFERENCE_MINUEND_PLACES=125, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=198, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=89, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=105, PETRI_DIFFERENCE_SUBTRAHEND_STATES=52, PETRI_FLOW=3342, PETRI_PLACES=188, PETRI_TRANSITIONS=271} [2023-09-01 12:45:16,400 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 158 predicate places. [2023-09-01 12:45:16,400 INFO L495 AbstractCegarLoop]: Abstraction has has 188 places, 271 transitions, 3342 flow [2023-09-01 12:45:16,400 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 84.61904761904762) internal successors, (1777), 21 states have internal predecessors, (1777), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 12:45:16,401 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 12:45:16,401 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 12:45:16,405 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2023-09-01 12:45:16,602 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 12:45:16,602 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-09-01 12:45:16,602 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 12:45:16,602 INFO L85 PathProgramCache]: Analyzing trace with hash 297215833, now seen corresponding path program 4 times [2023-09-01 12:45:16,602 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 12:45:16,602 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [459228932] [2023-09-01 12:45:16,602 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 12:45:16,603 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 12:45:16,628 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 12:45:16,934 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 12:45:16,934 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 12:45:16,934 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [459228932] [2023-09-01 12:45:16,934 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [459228932] provided 0 perfect and 1 imperfect interpolant sequences [2023-09-01 12:45:16,934 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1790338623] [2023-09-01 12:45:16,935 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-09-01 12:45:16,935 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 12:45:16,935 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-09-01 12:45:16,936 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 12:45:16,937 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 12:45:17,003 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-09-01 12:45:17,003 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-09-01 12:45:17,004 INFO L263 TraceCheckSpWp]: Trace formula consists of 170 conjuncts, 15 conjunts are in the unsatisfiable core [2023-09-01 12:45:17,007 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 12:45:17,248 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 12:45:17,248 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-09-01 12:45:18,139 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 12:45:18,140 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1790338623] provided 0 perfect and 2 imperfect interpolant sequences [2023-09-01 12:45:18,140 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-09-01 12:45:18,140 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 24 [2023-09-01 12:45:18,140 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1900486089] [2023-09-01 12:45:18,140 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-09-01 12:45:18,141 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2023-09-01 12:45:18,142 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 12:45:18,143 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2023-09-01 12:45:18,143 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=125, Invalid=475, Unknown=0, NotChecked=0, Total=600 [2023-09-01 12:45:18,273 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 82 out of 188 [2023-09-01 12:45:18,274 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 188 places, 271 transitions, 3342 flow. Second operand has 25 states, 25 states have (on average 84.32) internal successors, (2108), 25 states have internal predecessors, (2108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 12:45:18,274 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 12:45:18,274 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 82 of 188 [2023-09-01 12:45:18,274 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 12:45:21,917 INFO L130 PetriNetUnfolder]: 3060/5420 cut-off events. [2023-09-01 12:45:21,918 INFO L131 PetriNetUnfolder]: For 97652/97983 co-relation queries the response was YES. [2023-09-01 12:45:21,936 INFO L83 FinitePrefix]: Finished finitePrefix Result has 36830 conditions, 5420 events. 3060/5420 cut-off events. For 97652/97983 co-relation queries the response was YES. Maximal size of possible extension queue 297. Compared 35551 event pairs, 34 based on Foata normal form. 311/5651 useless extension candidates. Maximal degree in co-relation 36146. Up to 1377 conditions per place. [2023-09-01 12:45:21,951 INFO L137 encePairwiseOnDemand]: 181/188 looper letters, 290 selfloop transitions, 254 changer transitions 342/901 dead transitions. [2023-09-01 12:45:21,952 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 247 places, 901 transitions, 12498 flow [2023-09-01 12:45:21,952 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 78 states. [2023-09-01 12:45:21,952 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 78 states. [2023-09-01 12:45:21,955 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 78 states to 78 states and 6953 transitions. [2023-09-01 12:45:21,957 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4741543917075832 [2023-09-01 12:45:21,957 INFO L72 ComplementDD]: Start complementDD. Operand 78 states and 6953 transitions. [2023-09-01 12:45:21,957 INFO L73 IsDeterministic]: Start isDeterministic. Operand 78 states and 6953 transitions. [2023-09-01 12:45:21,958 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 12:45:21,958 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 78 states and 6953 transitions. [2023-09-01 12:45:21,964 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 79 states, 78 states have (on average 89.14102564102564) internal successors, (6953), 78 states have internal predecessors, (6953), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 12:45:21,973 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 79 states, 79 states have (on average 188.0) internal successors, (14852), 79 states have internal predecessors, (14852), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 12:45:21,974 INFO L81 ComplementDD]: Finished complementDD. Result has 79 states, 79 states have (on average 188.0) internal successors, (14852), 79 states have internal predecessors, (14852), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 12:45:21,974 INFO L175 Difference]: Start difference. First operand has 188 places, 271 transitions, 3342 flow. Second operand 78 states and 6953 transitions. [2023-09-01 12:45:21,974 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 247 places, 901 transitions, 12498 flow [2023-09-01 12:45:22,317 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 233 places, 901 transitions, 11020 flow, removed 730 selfloop flow, removed 14 redundant places. [2023-09-01 12:45:22,324 INFO L231 Difference]: Finished difference. Result has 255 places, 361 transitions, 5001 flow [2023-09-01 12:45:22,324 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=188, PETRI_DIFFERENCE_MINUEND_FLOW=2914, PETRI_DIFFERENCE_MINUEND_PLACES=156, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=271, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=166, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=101, PETRI_DIFFERENCE_SUBTRAHEND_STATES=78, PETRI_FLOW=5001, PETRI_PLACES=255, PETRI_TRANSITIONS=361} [2023-09-01 12:45:22,324 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 225 predicate places. [2023-09-01 12:45:22,324 INFO L495 AbstractCegarLoop]: Abstraction has has 255 places, 361 transitions, 5001 flow [2023-09-01 12:45:22,325 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 84.32) internal successors, (2108), 25 states have internal predecessors, (2108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 12:45:22,325 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 12:45:22,325 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 12:45:22,340 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 12:45:22,530 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2023-09-01 12:45:22,532 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-09-01 12:45:22,532 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 12:45:22,532 INFO L85 PathProgramCache]: Analyzing trace with hash 915863082, now seen corresponding path program 5 times [2023-09-01 12:45:22,533 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 12:45:22,533 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1968543111] [2023-09-01 12:45:22,533 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 12:45:22,533 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 12:45:22,572 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 12:45:22,853 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 1 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 12:45:22,854 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 12:45:22,854 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1968543111] [2023-09-01 12:45:22,854 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1968543111] provided 0 perfect and 1 imperfect interpolant sequences [2023-09-01 12:45:22,854 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [637918540] [2023-09-01 12:45:22,854 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-09-01 12:45:22,854 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 12:45:22,855 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-09-01 12:45:22,855 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 12:45:22,857 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 12:45:22,930 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2023-09-01 12:45:22,930 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-09-01 12:45:22,931 INFO L263 TraceCheckSpWp]: Trace formula consists of 170 conjuncts, 15 conjunts are in the unsatisfiable core [2023-09-01 12:45:22,936 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 12:45:23,242 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 1 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 12:45:23,242 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-09-01 12:45:24,123 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 1 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 12:45:24,123 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [637918540] provided 0 perfect and 2 imperfect interpolant sequences [2023-09-01 12:45:24,123 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-09-01 12:45:24,123 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 24 [2023-09-01 12:45:24,123 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2096465752] [2023-09-01 12:45:24,123 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-09-01 12:45:24,124 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2023-09-01 12:45:24,124 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 12:45:24,124 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2023-09-01 12:45:24,124 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=125, Invalid=475, Unknown=0, NotChecked=0, Total=600 [2023-09-01 12:45:24,247 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 82 out of 188 [2023-09-01 12:45:24,248 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 255 places, 361 transitions, 5001 flow. Second operand has 25 states, 25 states have (on average 84.56) internal successors, (2114), 25 states have internal predecessors, (2114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 12:45:24,248 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 12:45:24,248 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 82 of 188 [2023-09-01 12:45:24,248 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 12:45:27,547 INFO L130 PetriNetUnfolder]: 3239/5749 cut-off events. [2023-09-01 12:45:27,547 INFO L131 PetriNetUnfolder]: For 171465/171808 co-relation queries the response was YES. [2023-09-01 12:45:27,574 INFO L83 FinitePrefix]: Finished finitePrefix Result has 44413 conditions, 5749 events. 3239/5749 cut-off events. For 171465/171808 co-relation queries the response was YES. Maximal size of possible extension queue 290. Compared 38196 event pairs, 14 based on Foata normal form. 323/5992 useless extension candidates. Maximal degree in co-relation 44253. Up to 1495 conditions per place. [2023-09-01 12:45:27,593 INFO L137 encePairwiseOnDemand]: 181/188 looper letters, 307 selfloop transitions, 257 changer transitions 271/855 dead transitions. [2023-09-01 12:45:27,594 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 287 places, 855 transitions, 14219 flow [2023-09-01 12:45:27,594 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 65 states. [2023-09-01 12:45:27,594 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 65 states. [2023-09-01 12:45:27,598 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 65 states to 65 states and 5741 transitions. [2023-09-01 12:45:27,599 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4698036006546645 [2023-09-01 12:45:27,599 INFO L72 ComplementDD]: Start complementDD. Operand 65 states and 5741 transitions. [2023-09-01 12:45:27,599 INFO L73 IsDeterministic]: Start isDeterministic. Operand 65 states and 5741 transitions. [2023-09-01 12:45:27,600 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 12:45:27,601 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 65 states and 5741 transitions. [2023-09-01 12:45:27,606 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 66 states, 65 states have (on average 88.32307692307693) internal successors, (5741), 65 states have internal predecessors, (5741), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 12:45:27,613 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 66 states, 66 states have (on average 188.0) internal successors, (12408), 66 states have internal predecessors, (12408), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 12:45:27,614 INFO L81 ComplementDD]: Finished complementDD. Result has 66 states, 66 states have (on average 188.0) internal successors, (12408), 66 states have internal predecessors, (12408), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 12:45:27,614 INFO L175 Difference]: Start difference. First operand has 255 places, 361 transitions, 5001 flow. Second operand 65 states and 5741 transitions. [2023-09-01 12:45:27,614 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 287 places, 855 transitions, 14219 flow [2023-09-01 12:45:28,573 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 251 places, 855 transitions, 11271 flow, removed 1427 selfloop flow, removed 36 redundant places. [2023-09-01 12:45:28,581 INFO L231 Difference]: Finished difference. Result has 275 places, 422 transitions, 5858 flow [2023-09-01 12:45:28,581 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=188, PETRI_DIFFERENCE_MINUEND_FLOW=4040, PETRI_DIFFERENCE_MINUEND_PLACES=187, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=361, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=183, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=154, PETRI_DIFFERENCE_SUBTRAHEND_STATES=65, PETRI_FLOW=5858, PETRI_PLACES=275, PETRI_TRANSITIONS=422} [2023-09-01 12:45:28,582 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 245 predicate places. [2023-09-01 12:45:28,582 INFO L495 AbstractCegarLoop]: Abstraction has has 275 places, 422 transitions, 5858 flow [2023-09-01 12:45:28,582 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 84.56) internal successors, (2114), 25 states have internal predecessors, (2114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 12:45:28,583 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 12:45:28,583 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 12:45:28,588 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 12:45:28,786 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 12:45:28,786 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-09-01 12:45:28,786 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 12:45:28,786 INFO L85 PathProgramCache]: Analyzing trace with hash -1511671080, now seen corresponding path program 6 times [2023-09-01 12:45:28,786 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 12:45:28,786 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1583867600] [2023-09-01 12:45:28,786 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 12:45:28,786 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 12:45:28,823 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 12:45:29,123 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 3 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 12:45:29,124 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 12:45:29,124 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1583867600] [2023-09-01 12:45:29,124 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1583867600] provided 0 perfect and 1 imperfect interpolant sequences [2023-09-01 12:45:29,124 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1100483872] [2023-09-01 12:45:29,124 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-09-01 12:45:29,124 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 12:45:29,125 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-09-01 12:45:29,125 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 12:45:29,128 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 12:45:29,228 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2023-09-01 12:45:29,228 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-09-01 12:45:29,229 INFO L263 TraceCheckSpWp]: Trace formula consists of 170 conjuncts, 15 conjunts are in the unsatisfiable core [2023-09-01 12:45:29,231 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 12:45:29,555 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 12:45:29,556 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-09-01 12:45:30,582 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 12:45:30,582 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1100483872] provided 0 perfect and 2 imperfect interpolant sequences [2023-09-01 12:45:30,582 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-09-01 12:45:30,582 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 24 [2023-09-01 12:45:30,582 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1356608681] [2023-09-01 12:45:30,582 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-09-01 12:45:30,582 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2023-09-01 12:45:30,583 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 12:45:30,583 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2023-09-01 12:45:30,583 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=129, Invalid=471, Unknown=0, NotChecked=0, Total=600 [2023-09-01 12:45:30,726 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 79 out of 188 [2023-09-01 12:45:30,727 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 275 places, 422 transitions, 5858 flow. Second operand has 25 states, 25 states have (on average 81.88) internal successors, (2047), 25 states have internal predecessors, (2047), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 12:45:30,727 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 12:45:30,727 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 79 of 188 [2023-09-01 12:45:30,727 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 12:45:36,478 INFO L130 PetriNetUnfolder]: 5581/8996 cut-off events. [2023-09-01 12:45:36,479 INFO L131 PetriNetUnfolder]: For 148695/148695 co-relation queries the response was YES. [2023-09-01 12:45:36,519 INFO L83 FinitePrefix]: Finished finitePrefix Result has 55616 conditions, 8996 events. 5581/8996 cut-off events. For 148695/148695 co-relation queries the response was YES. Maximal size of possible extension queue 361. Compared 54762 event pairs, 237 based on Foata normal form. 344/9340 useless extension candidates. Maximal degree in co-relation 55215. Up to 2614 conditions per place. [2023-09-01 12:45:36,547 INFO L137 encePairwiseOnDemand]: 179/188 looper letters, 437 selfloop transitions, 263 changer transitions 421/1121 dead transitions. [2023-09-01 12:45:36,547 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 335 places, 1121 transitions, 16429 flow [2023-09-01 12:45:36,547 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 95 states. [2023-09-01 12:45:36,547 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 95 states. [2023-09-01 12:45:36,552 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 95 states to 95 states and 8124 transitions. [2023-09-01 12:45:36,554 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45487122060470325 [2023-09-01 12:45:36,554 INFO L72 ComplementDD]: Start complementDD. Operand 95 states and 8124 transitions. [2023-09-01 12:45:36,554 INFO L73 IsDeterministic]: Start isDeterministic. Operand 95 states and 8124 transitions. [2023-09-01 12:45:36,556 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 12:45:36,556 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 95 states and 8124 transitions. [2023-09-01 12:45:36,564 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 96 states, 95 states have (on average 85.51578947368421) internal successors, (8124), 95 states have internal predecessors, (8124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 12:45:36,574 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 96 states, 96 states have (on average 188.0) internal successors, (18048), 96 states have internal predecessors, (18048), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 12:45:36,576 INFO L81 ComplementDD]: Finished complementDD. Result has 96 states, 96 states have (on average 188.0) internal successors, (18048), 96 states have internal predecessors, (18048), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 12:45:36,576 INFO L175 Difference]: Start difference. First operand has 275 places, 422 transitions, 5858 flow. Second operand 95 states and 8124 transitions. [2023-09-01 12:45:36,576 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 335 places, 1121 transitions, 16429 flow [2023-09-01 12:45:37,254 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 292 places, 1121 transitions, 14493 flow, removed 782 selfloop flow, removed 43 redundant places. [2023-09-01 12:45:37,264 INFO L231 Difference]: Finished difference. Result has 352 places, 486 transitions, 7078 flow [2023-09-01 12:45:37,264 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=188, PETRI_DIFFERENCE_MINUEND_FLOW=4988, PETRI_DIFFERENCE_MINUEND_PLACES=198, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=422, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=184, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=220, PETRI_DIFFERENCE_SUBTRAHEND_STATES=95, PETRI_FLOW=7078, PETRI_PLACES=352, PETRI_TRANSITIONS=486} [2023-09-01 12:45:37,264 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 322 predicate places. [2023-09-01 12:45:37,265 INFO L495 AbstractCegarLoop]: Abstraction has has 352 places, 486 transitions, 7078 flow [2023-09-01 12:45:37,265 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 81.88) internal successors, (2047), 25 states have internal predecessors, (2047), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 12:45:37,265 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 12:45:37,265 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 12:45:37,271 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2023-09-01 12:45:37,466 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2023-09-01 12:45:37,466 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-09-01 12:45:37,467 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 12:45:37,467 INFO L85 PathProgramCache]: Analyzing trace with hash 1657231966, now seen corresponding path program 7 times [2023-09-01 12:45:37,467 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 12:45:37,467 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [700998847] [2023-09-01 12:45:37,467 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 12:45:37,467 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 12:45:37,485 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 12:45:37,766 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 7 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 12:45:37,767 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 12:45:37,767 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [700998847] [2023-09-01 12:45:37,767 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [700998847] provided 0 perfect and 1 imperfect interpolant sequences [2023-09-01 12:45:37,767 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [184944216] [2023-09-01 12:45:37,767 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-09-01 12:45:37,768 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 12:45:37,768 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-09-01 12:45:37,769 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 12:45:37,771 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 12:45:37,840 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 12:45:37,841 INFO L263 TraceCheckSpWp]: Trace formula consists of 170 conjuncts, 15 conjunts are in the unsatisfiable core [2023-09-01 12:45:37,845 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 12:45:38,159 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 7 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 12:45:38,159 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-09-01 12:45:39,021 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 7 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 12:45:39,021 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [184944216] provided 0 perfect and 2 imperfect interpolant sequences [2023-09-01 12:45:39,021 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-09-01 12:45:39,021 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 24 [2023-09-01 12:45:39,022 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1088306544] [2023-09-01 12:45:39,022 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-09-01 12:45:39,022 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2023-09-01 12:45:39,022 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 12:45:39,022 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2023-09-01 12:45:39,022 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=128, Invalid=472, Unknown=0, NotChecked=0, Total=600 [2023-09-01 12:45:39,131 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 82 out of 188 [2023-09-01 12:45:39,133 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 352 places, 486 transitions, 7078 flow. Second operand has 25 states, 25 states have (on average 84.2) internal successors, (2105), 25 states have internal predecessors, (2105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 12:45:39,133 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 12:45:39,133 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 82 of 188 [2023-09-01 12:45:39,133 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 12:45:42,725 INFO L130 PetriNetUnfolder]: 4047/7267 cut-off events. [2023-09-01 12:45:42,725 INFO L131 PetriNetUnfolder]: For 495484/496052 co-relation queries the response was YES. [2023-09-01 12:45:42,776 INFO L83 FinitePrefix]: Finished finitePrefix Result has 65705 conditions, 7267 events. 4047/7267 cut-off events. For 495484/496052 co-relation queries the response was YES. Maximal size of possible extension queue 356. Compared 50528 event pairs, 140 based on Foata normal form. 304/7504 useless extension candidates. Maximal degree in co-relation 65523. Up to 1897 conditions per place. [2023-09-01 12:45:42,803 INFO L137 encePairwiseOnDemand]: 181/188 looper letters, 435 selfloop transitions, 256 changer transitions 266/975 dead transitions. [2023-09-01 12:45:42,803 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 353 places, 975 transitions, 17064 flow [2023-09-01 12:45:42,804 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 62 states. [2023-09-01 12:45:42,804 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 62 states. [2023-09-01 12:45:42,807 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 5530 transitions. [2023-09-01 12:45:42,808 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4744337680164722 [2023-09-01 12:45:42,809 INFO L72 ComplementDD]: Start complementDD. Operand 62 states and 5530 transitions. [2023-09-01 12:45:42,809 INFO L73 IsDeterministic]: Start isDeterministic. Operand 62 states and 5530 transitions. [2023-09-01 12:45:42,810 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 12:45:42,810 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 62 states and 5530 transitions. [2023-09-01 12:45:42,815 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 63 states, 62 states have (on average 89.19354838709677) internal successors, (5530), 62 states have internal predecessors, (5530), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 12:45:42,821 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 63 states, 63 states have (on average 188.0) internal successors, (11844), 63 states have internal predecessors, (11844), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 12:45:42,822 INFO L81 ComplementDD]: Finished complementDD. Result has 63 states, 63 states have (on average 188.0) internal successors, (11844), 63 states have internal predecessors, (11844), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 12:45:42,822 INFO L175 Difference]: Start difference. First operand has 352 places, 486 transitions, 7078 flow. Second operand 62 states and 5530 transitions. [2023-09-01 12:45:42,822 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 353 places, 975 transitions, 17064 flow [2023-09-01 12:45:43,664 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 285 places, 975 transitions, 13392 flow, removed 1651 selfloop flow, removed 68 redundant places. [2023-09-01 12:45:43,674 INFO L231 Difference]: Finished difference. Result has 308 places, 542 transitions, 8162 flow [2023-09-01 12:45:43,674 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=188, PETRI_DIFFERENCE_MINUEND_FLOW=6248, PETRI_DIFFERENCE_MINUEND_PLACES=224, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=486, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=187, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=279, PETRI_DIFFERENCE_SUBTRAHEND_STATES=62, PETRI_FLOW=8162, PETRI_PLACES=308, PETRI_TRANSITIONS=542} [2023-09-01 12:45:43,675 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 278 predicate places. [2023-09-01 12:45:43,675 INFO L495 AbstractCegarLoop]: Abstraction has has 308 places, 542 transitions, 8162 flow [2023-09-01 12:45:43,675 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 84.2) internal successors, (2105), 25 states have internal predecessors, (2105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 12:45:43,675 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 12:45:43,675 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 12:45:43,682 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 12:45:43,875 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2023-09-01 12:45:43,876 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-09-01 12:45:43,876 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 12:45:43,876 INFO L85 PathProgramCache]: Analyzing trace with hash -464045331, now seen corresponding path program 8 times [2023-09-01 12:45:43,876 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 12:45:43,876 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1694185713] [2023-09-01 12:45:43,876 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 12:45:43,877 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 12:45:43,900 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 12:45:44,187 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 3 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 12:45:44,188 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 12:45:44,188 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1694185713] [2023-09-01 12:45:44,188 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1694185713] provided 0 perfect and 1 imperfect interpolant sequences [2023-09-01 12:45:44,188 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1492385044] [2023-09-01 12:45:44,188 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-09-01 12:45:44,188 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 12:45:44,189 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-09-01 12:45:44,189 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 12:45:44,191 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 12:45:44,274 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-09-01 12:45:44,274 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-09-01 12:45:44,275 INFO L263 TraceCheckSpWp]: Trace formula consists of 170 conjuncts, 15 conjunts are in the unsatisfiable core [2023-09-01 12:45:44,278 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 12:45:44,515 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 12:45:44,515 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-09-01 12:45:45,530 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 12:45:45,530 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1492385044] provided 0 perfect and 2 imperfect interpolant sequences [2023-09-01 12:45:45,530 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-09-01 12:45:45,530 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 24 [2023-09-01 12:45:45,530 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [6839924] [2023-09-01 12:45:45,530 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-09-01 12:45:45,530 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2023-09-01 12:45:45,531 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 12:45:45,531 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2023-09-01 12:45:45,531 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=125, Invalid=475, Unknown=0, NotChecked=0, Total=600 [2023-09-01 12:45:45,656 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 79 out of 188 [2023-09-01 12:45:45,657 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 308 places, 542 transitions, 8162 flow. Second operand has 25 states, 25 states have (on average 82.04) internal successors, (2051), 25 states have internal predecessors, (2051), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 12:45:45,657 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 12:45:45,657 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 79 of 188 [2023-09-01 12:45:45,657 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 12:45:50,687 INFO L130 PetriNetUnfolder]: 6689/10816 cut-off events. [2023-09-01 12:45:50,687 INFO L131 PetriNetUnfolder]: For 165963/165963 co-relation queries the response was YES. [2023-09-01 12:45:50,738 INFO L83 FinitePrefix]: Finished finitePrefix Result has 70139 conditions, 10816 events. 6689/10816 cut-off events. For 165963/165963 co-relation queries the response was YES. Maximal size of possible extension queue 431. Compared 68219 event pairs, 507 based on Foata normal form. 178/10994 useless extension candidates. Maximal degree in co-relation 69928. Up to 4582 conditions per place. [2023-09-01 12:45:50,772 INFO L137 encePairwiseOnDemand]: 179/188 looper letters, 593 selfloop transitions, 292 changer transitions 232/1117 dead transitions. [2023-09-01 12:45:50,772 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 361 places, 1117 transitions, 17800 flow [2023-09-01 12:45:50,772 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 79 states. [2023-09-01 12:45:50,772 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 79 states. [2023-09-01 12:45:50,775 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79 states to 79 states and 6800 transitions. [2023-09-01 12:45:50,777 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45785079450579047 [2023-09-01 12:45:50,777 INFO L72 ComplementDD]: Start complementDD. Operand 79 states and 6800 transitions. [2023-09-01 12:45:50,777 INFO L73 IsDeterministic]: Start isDeterministic. Operand 79 states and 6800 transitions. [2023-09-01 12:45:50,778 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 12:45:50,778 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 79 states and 6800 transitions. [2023-09-01 12:45:50,783 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 80 states, 79 states have (on average 86.07594936708861) internal successors, (6800), 79 states have internal predecessors, (6800), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 12:45:50,790 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 80 states, 80 states have (on average 188.0) internal successors, (15040), 80 states have internal predecessors, (15040), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 12:45:50,790 INFO L81 ComplementDD]: Finished complementDD. Result has 80 states, 80 states have (on average 188.0) internal successors, (15040), 80 states have internal predecessors, (15040), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 12:45:50,791 INFO L175 Difference]: Start difference. First operand has 308 places, 542 transitions, 8162 flow. Second operand 79 states and 6800 transitions. [2023-09-01 12:45:50,791 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 361 places, 1117 transitions, 17800 flow [2023-09-01 12:45:51,762 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 329 places, 1117 transitions, 16890 flow, removed 399 selfloop flow, removed 32 redundant places. [2023-09-01 12:45:51,773 INFO L231 Difference]: Finished difference. Result has 375 places, 648 transitions, 10710 flow [2023-09-01 12:45:51,774 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=188, PETRI_DIFFERENCE_MINUEND_FLOW=7658, PETRI_DIFFERENCE_MINUEND_PLACES=251, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=542, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=196, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=328, PETRI_DIFFERENCE_SUBTRAHEND_STATES=79, PETRI_FLOW=10710, PETRI_PLACES=375, PETRI_TRANSITIONS=648} [2023-09-01 12:45:51,774 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 345 predicate places. [2023-09-01 12:45:51,774 INFO L495 AbstractCegarLoop]: Abstraction has has 375 places, 648 transitions, 10710 flow [2023-09-01 12:45:51,774 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 82.04) internal successors, (2051), 25 states have internal predecessors, (2051), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 12:45:51,774 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 12:45:51,774 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 12:45:51,779 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 12:45:51,975 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2023-09-01 12:45:51,975 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-09-01 12:45:51,975 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 12:45:51,975 INFO L85 PathProgramCache]: Analyzing trace with hash -784792479, now seen corresponding path program 9 times [2023-09-01 12:45:51,975 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 12:45:51,976 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1771236419] [2023-09-01 12:45:51,976 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 12:45:51,976 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 12:45:51,997 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 12:45:52,306 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 7 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 12:45:52,307 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 12:45:52,307 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1771236419] [2023-09-01 12:45:52,307 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1771236419] provided 0 perfect and 1 imperfect interpolant sequences [2023-09-01 12:45:52,307 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [980342227] [2023-09-01 12:45:52,307 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-09-01 12:45:52,307 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 12:45:52,307 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-09-01 12:45:52,308 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 12:45:52,308 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 12:45:52,417 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2023-09-01 12:45:52,417 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-09-01 12:45:52,418 INFO L263 TraceCheckSpWp]: Trace formula consists of 170 conjuncts, 15 conjunts are in the unsatisfiable core [2023-09-01 12:45:52,431 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 12:45:52,706 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 17 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 12:45:52,707 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-09-01 12:45:53,711 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 17 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 12:45:53,711 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [980342227] provided 0 perfect and 2 imperfect interpolant sequences [2023-09-01 12:45:53,711 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-09-01 12:45:53,711 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 24 [2023-09-01 12:45:53,711 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1165562956] [2023-09-01 12:45:53,712 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-09-01 12:45:53,712 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2023-09-01 12:45:53,712 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 12:45:53,712 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2023-09-01 12:45:53,712 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=125, Invalid=475, Unknown=0, NotChecked=0, Total=600 [2023-09-01 12:45:53,874 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 79 out of 188 [2023-09-01 12:45:53,876 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 375 places, 648 transitions, 10710 flow. Second operand has 25 states, 25 states have (on average 82.04) internal successors, (2051), 25 states have internal predecessors, (2051), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 12:45:53,876 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 12:45:53,876 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 79 of 188 [2023-09-01 12:45:53,876 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 12:45:59,788 INFO L130 PetriNetUnfolder]: 7402/11955 cut-off events. [2023-09-01 12:45:59,788 INFO L131 PetriNetUnfolder]: For 473424/473424 co-relation queries the response was YES. [2023-09-01 12:45:59,868 INFO L83 FinitePrefix]: Finished finitePrefix Result has 94762 conditions, 11955 events. 7402/11955 cut-off events. For 473424/473424 co-relation queries the response was YES. Maximal size of possible extension queue 468. Compared 76607 event pairs, 565 based on Foata normal form. 200/12155 useless extension candidates. Maximal degree in co-relation 94584. Up to 5156 conditions per place. [2023-09-01 12:45:59,912 INFO L137 encePairwiseOnDemand]: 179/188 looper letters, 621 selfloop transitions, 286 changer transitions 285/1192 dead transitions. [2023-09-01 12:45:59,912 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 421 places, 1192 transitions, 22495 flow [2023-09-01 12:45:59,914 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 85 states. [2023-09-01 12:45:59,914 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 85 states. [2023-09-01 12:45:59,918 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 85 states to 85 states and 7291 transitions. [2023-09-01 12:45:59,919 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45625782227784734 [2023-09-01 12:45:59,920 INFO L72 ComplementDD]: Start complementDD. Operand 85 states and 7291 transitions. [2023-09-01 12:45:59,920 INFO L73 IsDeterministic]: Start isDeterministic. Operand 85 states and 7291 transitions. [2023-09-01 12:45:59,921 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 12:45:59,921 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 85 states and 7291 transitions. [2023-09-01 12:45:59,928 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 86 states, 85 states have (on average 85.7764705882353) internal successors, (7291), 85 states have internal predecessors, (7291), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 12:45:59,936 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 86 states, 86 states have (on average 188.0) internal successors, (16168), 86 states have internal predecessors, (16168), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 12:45:59,937 INFO L81 ComplementDD]: Finished complementDD. Result has 86 states, 86 states have (on average 188.0) internal successors, (16168), 86 states have internal predecessors, (16168), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 12:45:59,937 INFO L175 Difference]: Start difference. First operand has 375 places, 648 transitions, 10710 flow. Second operand 85 states and 7291 transitions. [2023-09-01 12:45:59,937 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 421 places, 1192 transitions, 22495 flow [2023-09-01 12:46:01,533 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 375 places, 1192 transitions, 19754 flow, removed 1331 selfloop flow, removed 46 redundant places. [2023-09-01 12:46:01,545 INFO L231 Difference]: Finished difference. Result has 425 places, 704 transitions, 12120 flow [2023-09-01 12:46:01,546 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=188, PETRI_DIFFERENCE_MINUEND_FLOW=9985, PETRI_DIFFERENCE_MINUEND_PLACES=291, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=648, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=225, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=419, PETRI_DIFFERENCE_SUBTRAHEND_STATES=85, PETRI_FLOW=12120, PETRI_PLACES=425, PETRI_TRANSITIONS=704} [2023-09-01 12:46:01,546 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 395 predicate places. [2023-09-01 12:46:01,546 INFO L495 AbstractCegarLoop]: Abstraction has has 425 places, 704 transitions, 12120 flow [2023-09-01 12:46:01,547 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 82.04) internal successors, (2051), 25 states have internal predecessors, (2051), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 12:46:01,547 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 12:46:01,547 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 12:46:01,553 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 12:46:01,747 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2023-09-01 12:46:01,747 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-09-01 12:46:01,747 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 12:46:01,747 INFO L85 PathProgramCache]: Analyzing trace with hash 2122151057, now seen corresponding path program 10 times [2023-09-01 12:46:01,747 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 12:46:01,748 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [656901101] [2023-09-01 12:46:01,748 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 12:46:01,748 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 12:46:01,765 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 12:46:02,019 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 3 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 12:46:02,020 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 12:46:02,020 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [656901101] [2023-09-01 12:46:02,020 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [656901101] provided 0 perfect and 1 imperfect interpolant sequences [2023-09-01 12:46:02,020 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2069257568] [2023-09-01 12:46:02,020 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-09-01 12:46:02,020 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 12:46:02,020 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-09-01 12:46:02,021 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 12:46:02,022 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 12:46:02,097 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-09-01 12:46:02,097 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-09-01 12:46:02,098 INFO L263 TraceCheckSpWp]: Trace formula consists of 170 conjuncts, 15 conjunts are in the unsatisfiable core [2023-09-01 12:46:02,099 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 12:46:02,397 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 3 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 12:46:02,397 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-09-01 12:46:03,457 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 3 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 12:46:03,458 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2069257568] provided 0 perfect and 2 imperfect interpolant sequences [2023-09-01 12:46:03,458 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-09-01 12:46:03,458 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 24 [2023-09-01 12:46:03,458 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1354681852] [2023-09-01 12:46:03,458 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-09-01 12:46:03,458 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2023-09-01 12:46:03,458 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 12:46:03,459 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2023-09-01 12:46:03,459 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=131, Invalid=469, Unknown=0, NotChecked=0, Total=600 [2023-09-01 12:46:03,560 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 82 out of 188 [2023-09-01 12:46:03,561 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 425 places, 704 transitions, 12120 flow. Second operand has 25 states, 25 states have (on average 84.44) internal successors, (2111), 25 states have internal predecessors, (2111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 12:46:03,561 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 12:46:03,561 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 82 of 188 [2023-09-01 12:46:03,561 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 12:46:08,433 INFO L130 PetriNetUnfolder]: 5407/9581 cut-off events. [2023-09-01 12:46:08,434 INFO L131 PetriNetUnfolder]: For 767021/768833 co-relation queries the response was YES. [2023-09-01 12:46:08,507 INFO L83 FinitePrefix]: Finished finitePrefix Result has 100214 conditions, 9581 events. 5407/9581 cut-off events. For 767021/768833 co-relation queries the response was YES. Maximal size of possible extension queue 447. Compared 69868 event pairs, 214 based on Foata normal form. 553/9937 useless extension candidates. Maximal degree in co-relation 100061. Up to 2863 conditions per place. [2023-09-01 12:46:08,541 INFO L137 encePairwiseOnDemand]: 181/188 looper letters, 567 selfloop transitions, 323 changer transitions 273/1193 dead transitions. [2023-09-01 12:46:08,541 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 436 places, 1193 transitions, 24655 flow [2023-09-01 12:46:08,541 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 64 states. [2023-09-01 12:46:08,541 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 64 states. [2023-09-01 12:46:08,543 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 5650 transitions. [2023-09-01 12:46:08,544 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4695811170212766 [2023-09-01 12:46:08,544 INFO L72 ComplementDD]: Start complementDD. Operand 64 states and 5650 transitions. [2023-09-01 12:46:08,545 INFO L73 IsDeterministic]: Start isDeterministic. Operand 64 states and 5650 transitions. [2023-09-01 12:46:08,545 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 12:46:08,545 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 64 states and 5650 transitions. [2023-09-01 12:46:08,549 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 65 states, 64 states have (on average 88.28125) internal successors, (5650), 64 states have internal predecessors, (5650), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 12:46:08,554 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 65 states, 65 states have (on average 188.0) internal successors, (12220), 65 states have internal predecessors, (12220), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 12:46:08,555 INFO L81 ComplementDD]: Finished complementDD. Result has 65 states, 65 states have (on average 188.0) internal successors, (12220), 65 states have internal predecessors, (12220), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 12:46:08,555 INFO L175 Difference]: Start difference. First operand has 425 places, 704 transitions, 12120 flow. Second operand 64 states and 5650 transitions. [2023-09-01 12:46:08,555 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 436 places, 1193 transitions, 24655 flow [2023-09-01 12:46:10,132 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 370 places, 1193 transitions, 20055 flow, removed 2093 selfloop flow, removed 66 redundant places. [2023-09-01 12:46:10,144 INFO L231 Difference]: Finished difference. Result has 396 places, 758 transitions, 13330 flow [2023-09-01 12:46:10,145 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=188, PETRI_DIFFERENCE_MINUEND_FLOW=11118, PETRI_DIFFERENCE_MINUEND_PLACES=307, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=704, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=247, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=431, PETRI_DIFFERENCE_SUBTRAHEND_STATES=64, PETRI_FLOW=13330, PETRI_PLACES=396, PETRI_TRANSITIONS=758} [2023-09-01 12:46:10,145 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 366 predicate places. [2023-09-01 12:46:10,145 INFO L495 AbstractCegarLoop]: Abstraction has has 396 places, 758 transitions, 13330 flow [2023-09-01 12:46:10,146 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 84.44) internal successors, (2111), 25 states have internal predecessors, (2111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 12:46:10,146 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 12:46:10,146 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 12:46:10,152 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Ended with exit code 0 [2023-09-01 12:46:10,350 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16,15 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 12:46:10,350 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-09-01 12:46:10,350 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 12:46:10,350 INFO L85 PathProgramCache]: Analyzing trace with hash 1978207091, now seen corresponding path program 11 times [2023-09-01 12:46:10,429 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 12:46:10,429 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1577466556] [2023-09-01 12:46:10,430 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 12:46:10,430 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 12:46:10,457 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 12:46:10,729 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 1 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 12:46:10,729 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 12:46:10,729 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1577466556] [2023-09-01 12:46:10,729 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1577466556] provided 0 perfect and 1 imperfect interpolant sequences [2023-09-01 12:46:10,729 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1354956755] [2023-09-01 12:46:10,729 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-09-01 12:46:10,730 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 12:46:10,730 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-09-01 12:46:10,730 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 12:46:10,732 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 12:46:10,812 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2023-09-01 12:46:10,813 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-09-01 12:46:10,814 INFO L263 TraceCheckSpWp]: Trace formula consists of 170 conjuncts, 15 conjunts are in the unsatisfiable core [2023-09-01 12:46:10,817 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 12:46:11,093 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 1 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 12:46:11,093 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-09-01 12:46:12,015 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 1 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 12:46:12,016 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1354956755] provided 0 perfect and 2 imperfect interpolant sequences [2023-09-01 12:46:12,016 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-09-01 12:46:12,016 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 24 [2023-09-01 12:46:12,016 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1395775812] [2023-09-01 12:46:12,016 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-09-01 12:46:12,016 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2023-09-01 12:46:12,016 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 12:46:12,017 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2023-09-01 12:46:12,017 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=132, Invalid=468, Unknown=0, NotChecked=0, Total=600 [2023-09-01 12:46:12,127 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 82 out of 188 [2023-09-01 12:46:12,128 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 396 places, 758 transitions, 13330 flow. Second operand has 25 states, 25 states have (on average 84.56) internal successors, (2114), 25 states have internal predecessors, (2114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 12:46:12,129 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 12:46:12,129 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 82 of 188 [2023-09-01 12:46:12,129 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 12:46:16,852 INFO L130 PetriNetUnfolder]: 5815/10433 cut-off events. [2023-09-01 12:46:16,853 INFO L131 PetriNetUnfolder]: For 274125/274789 co-relation queries the response was YES. [2023-09-01 12:46:16,921 INFO L83 FinitePrefix]: Finished finitePrefix Result has 83319 conditions, 10433 events. 5815/10433 cut-off events. For 274125/274789 co-relation queries the response was YES. Maximal size of possible extension queue 480. Compared 76952 event pairs, 424 based on Foata normal form. 386/10714 useless extension candidates. Maximal degree in co-relation 83193. Up to 3384 conditions per place. [2023-09-01 12:46:16,962 INFO L137 encePairwiseOnDemand]: 181/188 looper letters, 692 selfloop transitions, 314 changer transitions 236/1264 dead transitions. [2023-09-01 12:46:16,962 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 429 places, 1264 transitions, 23654 flow [2023-09-01 12:46:16,963 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 64 states. [2023-09-01 12:46:16,963 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 64 states. [2023-09-01 12:46:16,966 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 5712 transitions. [2023-09-01 12:46:16,967 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4747340425531915 [2023-09-01 12:46:16,967 INFO L72 ComplementDD]: Start complementDD. Operand 64 states and 5712 transitions. [2023-09-01 12:46:16,967 INFO L73 IsDeterministic]: Start isDeterministic. Operand 64 states and 5712 transitions. [2023-09-01 12:46:16,968 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 12:46:16,968 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 64 states and 5712 transitions. [2023-09-01 12:46:16,972 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 65 states, 64 states have (on average 89.25) internal successors, (5712), 64 states have internal predecessors, (5712), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 12:46:16,977 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 65 states, 65 states have (on average 188.0) internal successors, (12220), 65 states have internal predecessors, (12220), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 12:46:16,977 INFO L81 ComplementDD]: Finished complementDD. Result has 65 states, 65 states have (on average 188.0) internal successors, (12220), 65 states have internal predecessors, (12220), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 12:46:16,978 INFO L175 Difference]: Start difference. First operand has 396 places, 758 transitions, 13330 flow. Second operand 64 states and 5712 transitions. [2023-09-01 12:46:16,978 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 429 places, 1264 transitions, 23654 flow [2023-09-01 12:46:18,595 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 394 places, 1264 transitions, 22031 flow, removed 755 selfloop flow, removed 35 redundant places. [2023-09-01 12:46:18,609 INFO L231 Difference]: Finished difference. Result has 412 places, 836 transitions, 15233 flow [2023-09-01 12:46:18,609 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=188, PETRI_DIFFERENCE_MINUEND_FLOW=12492, PETRI_DIFFERENCE_MINUEND_PLACES=331, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=758, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=228, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=518, PETRI_DIFFERENCE_SUBTRAHEND_STATES=64, PETRI_FLOW=15233, PETRI_PLACES=412, PETRI_TRANSITIONS=836} [2023-09-01 12:46:18,609 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 382 predicate places. [2023-09-01 12:46:18,609 INFO L495 AbstractCegarLoop]: Abstraction has has 412 places, 836 transitions, 15233 flow [2023-09-01 12:46:18,610 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 84.56) internal successors, (2114), 25 states have internal predecessors, (2114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 12:46:18,610 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 12:46:18,610 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 12:46:18,617 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Ended with exit code 0 [2023-09-01 12:46:18,814 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2023-09-01 12:46:18,814 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-09-01 12:46:18,815 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 12:46:18,815 INFO L85 PathProgramCache]: Analyzing trace with hash -535611417, now seen corresponding path program 12 times [2023-09-01 12:46:18,815 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 12:46:18,815 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1798815943] [2023-09-01 12:46:18,815 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 12:46:18,815 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 12:46:18,840 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 12:46:19,199 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 7 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 12:46:19,200 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 12:46:19,200 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1798815943] [2023-09-01 12:46:19,200 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1798815943] provided 0 perfect and 1 imperfect interpolant sequences [2023-09-01 12:46:19,200 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2080077200] [2023-09-01 12:46:19,200 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-09-01 12:46:19,200 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 12:46:19,201 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-09-01 12:46:19,201 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 12:46:19,203 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 12:46:19,296 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2023-09-01 12:46:19,296 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-09-01 12:46:19,297 INFO L263 TraceCheckSpWp]: Trace formula consists of 174 conjuncts, 16 conjunts are in the unsatisfiable core [2023-09-01 12:46:19,299 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 12:46:19,702 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 7 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 12:46:19,702 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-09-01 12:46:21,039 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 7 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 12:46:21,039 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2080077200] provided 0 perfect and 2 imperfect interpolant sequences [2023-09-01 12:46:21,039 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-09-01 12:46:21,040 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 26 [2023-09-01 12:46:21,040 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [991153806] [2023-09-01 12:46:21,040 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-09-01 12:46:21,040 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2023-09-01 12:46:21,040 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 12:46:21,040 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2023-09-01 12:46:21,041 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=149, Invalid=553, Unknown=0, NotChecked=0, Total=702 [2023-09-01 12:46:21,159 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 82 out of 188 [2023-09-01 12:46:21,160 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 412 places, 836 transitions, 15233 flow. Second operand has 27 states, 27 states have (on average 84.25925925925925) internal successors, (2275), 27 states have internal predecessors, (2275), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 12:46:21,160 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 12:46:21,160 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 82 of 188 [2023-09-01 12:46:21,160 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 12:46:28,400 INFO L130 PetriNetUnfolder]: 7392/13284 cut-off events. [2023-09-01 12:46:28,400 INFO L131 PetriNetUnfolder]: For 383744/384585 co-relation queries the response was YES. [2023-09-01 12:46:28,482 INFO L83 FinitePrefix]: Finished finitePrefix Result has 112165 conditions, 13284 events. 7392/13284 cut-off events. For 383744/384585 co-relation queries the response was YES. Maximal size of possible extension queue 663. Compared 102230 event pairs, 264 based on Foata normal form. 481/13615 useless extension candidates. Maximal degree in co-relation 111956. Up to 2966 conditions per place. [2023-09-01 12:46:28,529 INFO L137 encePairwiseOnDemand]: 181/188 looper letters, 747 selfloop transitions, 552 changer transitions 389/1710 dead transitions. [2023-09-01 12:46:28,529 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 487 places, 1710 transitions, 32131 flow [2023-09-01 12:46:28,530 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 97 states. [2023-09-01 12:46:28,530 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 97 states. [2023-09-01 12:46:28,533 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 97 states to 97 states and 8662 transitions. [2023-09-01 12:46:28,534 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4749945163413029 [2023-09-01 12:46:28,534 INFO L72 ComplementDD]: Start complementDD. Operand 97 states and 8662 transitions. [2023-09-01 12:46:28,534 INFO L73 IsDeterministic]: Start isDeterministic. Operand 97 states and 8662 transitions. [2023-09-01 12:46:28,535 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 12:46:28,535 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 97 states and 8662 transitions. [2023-09-01 12:46:28,539 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 98 states, 97 states have (on average 89.29896907216495) internal successors, (8662), 97 states have internal predecessors, (8662), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 12:46:28,547 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 98 states, 98 states have (on average 188.0) internal successors, (18424), 98 states have internal predecessors, (18424), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 12:46:28,548 INFO L81 ComplementDD]: Finished complementDD. Result has 98 states, 98 states have (on average 188.0) internal successors, (18424), 98 states have internal predecessors, (18424), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 12:46:28,548 INFO L175 Difference]: Start difference. First operand has 412 places, 836 transitions, 15233 flow. Second operand 97 states and 8662 transitions. [2023-09-01 12:46:28,548 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 487 places, 1710 transitions, 32131 flow [2023-09-01 12:46:30,634 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 458 places, 1710 transitions, 30260 flow, removed 759 selfloop flow, removed 29 redundant places. [2023-09-01 12:46:30,654 INFO L231 Difference]: Finished difference. Result has 486 places, 1010 transitions, 19858 flow [2023-09-01 12:46:30,654 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=188, PETRI_DIFFERENCE_MINUEND_FLOW=14042, PETRI_DIFFERENCE_MINUEND_PLACES=362, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=836, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=372, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=424, PETRI_DIFFERENCE_SUBTRAHEND_STATES=97, PETRI_FLOW=19858, PETRI_PLACES=486, PETRI_TRANSITIONS=1010} [2023-09-01 12:46:30,655 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 456 predicate places. [2023-09-01 12:46:30,655 INFO L495 AbstractCegarLoop]: Abstraction has has 486 places, 1010 transitions, 19858 flow [2023-09-01 12:46:30,655 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 84.25925925925925) internal successors, (2275), 27 states have internal predecessors, (2275), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 12:46:30,655 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 12:46:30,655 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 12:46:30,668 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2023-09-01 12:46:30,860 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,17 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 12:46:30,860 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-09-01 12:46:30,861 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 12:46:30,861 INFO L85 PathProgramCache]: Analyzing trace with hash -858648437, now seen corresponding path program 13 times [2023-09-01 12:46:30,861 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 12:46:30,861 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1156546841] [2023-09-01 12:46:30,861 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 12:46:30,862 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 12:46:30,886 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 12:46:31,280 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 7 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 12:46:31,280 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 12:46:31,280 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1156546841] [2023-09-01 12:46:31,280 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1156546841] provided 0 perfect and 1 imperfect interpolant sequences [2023-09-01 12:46:31,281 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1221298069] [2023-09-01 12:46:31,281 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-09-01 12:46:31,281 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 12:46:31,281 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-09-01 12:46:31,282 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 12:46:31,284 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 12:46:31,373 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 12:46:31,374 INFO L263 TraceCheckSpWp]: Trace formula consists of 174 conjuncts, 16 conjunts are in the unsatisfiable core [2023-09-01 12:46:31,376 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 12:46:31,812 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 7 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 12:46:31,812 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-09-01 12:46:33,458 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 7 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 12:46:33,458 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1221298069] provided 0 perfect and 2 imperfect interpolant sequences [2023-09-01 12:46:33,459 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-09-01 12:46:33,460 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 26 [2023-09-01 12:46:33,460 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2058431185] [2023-09-01 12:46:33,460 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-09-01 12:46:33,460 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2023-09-01 12:46:33,460 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 12:46:33,461 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2023-09-01 12:46:33,461 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=139, Invalid=563, Unknown=0, NotChecked=0, Total=702 [2023-09-01 12:46:33,592 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 82 out of 188 [2023-09-01 12:46:33,593 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 486 places, 1010 transitions, 19858 flow. Second operand has 27 states, 27 states have (on average 84.25925925925925) internal successors, (2275), 27 states have internal predecessors, (2275), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 12:46:33,593 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 12:46:33,593 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 82 of 188 [2023-09-01 12:46:33,593 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 12:46:42,281 INFO L130 PetriNetUnfolder]: 7897/14059 cut-off events. [2023-09-01 12:46:42,281 INFO L131 PetriNetUnfolder]: For 489922/491033 co-relation queries the response was YES. [2023-09-01 12:46:42,375 INFO L83 FinitePrefix]: Finished finitePrefix Result has 128980 conditions, 14059 events. 7897/14059 cut-off events. For 489922/491033 co-relation queries the response was YES. Maximal size of possible extension queue 756. Compared 108669 event pairs, 536 based on Foata normal form. 677/14533 useless extension candidates. Maximal degree in co-relation 128852. Up to 4328 conditions per place. [2023-09-01 12:46:42,427 INFO L137 encePairwiseOnDemand]: 181/188 looper letters, 890 selfloop transitions, 483 changer transitions 250/1673 dead transitions. [2023-09-01 12:46:42,428 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 537 places, 1673 transitions, 36054 flow [2023-09-01 12:46:42,428 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 83 states. [2023-09-01 12:46:42,428 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 83 states. [2023-09-01 12:46:42,430 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 83 states to 83 states and 7335 transitions. [2023-09-01 12:46:42,431 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4700717764675724 [2023-09-01 12:46:42,432 INFO L72 ComplementDD]: Start complementDD. Operand 83 states and 7335 transitions. [2023-09-01 12:46:42,432 INFO L73 IsDeterministic]: Start isDeterministic. Operand 83 states and 7335 transitions. [2023-09-01 12:46:42,433 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 12:46:42,433 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 83 states and 7335 transitions. [2023-09-01 12:46:42,437 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 84 states, 83 states have (on average 88.37349397590361) internal successors, (7335), 83 states have internal predecessors, (7335), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 12:46:42,443 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 84 states, 84 states have (on average 188.0) internal successors, (15792), 84 states have internal predecessors, (15792), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 12:46:42,444 INFO L81 ComplementDD]: Finished complementDD. Result has 84 states, 84 states have (on average 188.0) internal successors, (15792), 84 states have internal predecessors, (15792), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 12:46:42,444 INFO L175 Difference]: Start difference. First operand has 486 places, 1010 transitions, 19858 flow. Second operand 83 states and 7335 transitions. [2023-09-01 12:46:42,444 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 537 places, 1673 transitions, 36054 flow [2023-09-01 12:46:46,346 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 490 places, 1673 transitions, 32179 flow, removed 1862 selfloop flow, removed 47 redundant places. [2023-09-01 12:46:46,366 INFO L231 Difference]: Finished difference. Result has 522 places, 1182 transitions, 24013 flow [2023-09-01 12:46:46,367 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=188, PETRI_DIFFERENCE_MINUEND_FLOW=18289, PETRI_DIFFERENCE_MINUEND_PLACES=408, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1010, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=316, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=650, PETRI_DIFFERENCE_SUBTRAHEND_STATES=83, PETRI_FLOW=24013, PETRI_PLACES=522, PETRI_TRANSITIONS=1182} [2023-09-01 12:46:46,367 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 492 predicate places. [2023-09-01 12:46:46,367 INFO L495 AbstractCegarLoop]: Abstraction has has 522 places, 1182 transitions, 24013 flow [2023-09-01 12:46:46,368 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 84.25925925925925) internal successors, (2275), 27 states have internal predecessors, (2275), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 12:46:46,368 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 12:46:46,368 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 12:46:46,374 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Forceful destruction successful, exit code 0 [2023-09-01 12:46:46,568 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,18 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 12:46:46,568 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-09-01 12:46:46,569 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 12:46:46,569 INFO L85 PathProgramCache]: Analyzing trace with hash -815196267, now seen corresponding path program 14 times [2023-09-01 12:46:46,569 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 12:46:46,569 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [616437843] [2023-09-01 12:46:46,569 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 12:46:46,569 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 12:46:46,597 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 12:46:47,127 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 7 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 12:46:47,127 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 12:46:47,127 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [616437843] [2023-09-01 12:46:47,127 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [616437843] provided 0 perfect and 1 imperfect interpolant sequences [2023-09-01 12:46:47,127 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [831491971] [2023-09-01 12:46:47,127 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-09-01 12:46:47,127 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 12:46:47,127 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-09-01 12:46:47,128 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 12:46:47,129 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 12:46:47,217 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-09-01 12:46:47,218 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-09-01 12:46:47,218 INFO L263 TraceCheckSpWp]: Trace formula consists of 178 conjuncts, 17 conjunts are in the unsatisfiable core [2023-09-01 12:46:47,220 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 12:46:47,640 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 7 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 12:46:47,640 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-09-01 12:46:49,424 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 7 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 12:46:49,425 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [831491971] provided 0 perfect and 2 imperfect interpolant sequences [2023-09-01 12:46:49,425 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-09-01 12:46:49,425 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 29 [2023-09-01 12:46:49,425 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [464897344] [2023-09-01 12:46:49,425 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-09-01 12:46:49,425 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2023-09-01 12:46:49,425 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 12:46:49,426 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2023-09-01 12:46:49,426 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=179, Invalid=691, Unknown=0, NotChecked=0, Total=870 [2023-09-01 12:46:49,553 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 82 out of 188 [2023-09-01 12:46:49,554 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 522 places, 1182 transitions, 24013 flow. Second operand has 30 states, 30 states have (on average 83.96666666666667) internal successors, (2519), 30 states have internal predecessors, (2519), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 12:46:49,554 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 12:46:49,554 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 82 of 188 [2023-09-01 12:46:49,554 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 12:47:01,659 INFO L130 PetriNetUnfolder]: 9716/17394 cut-off events. [2023-09-01 12:47:01,659 INFO L131 PetriNetUnfolder]: For 616003/617340 co-relation queries the response was YES. [2023-09-01 12:47:01,783 INFO L83 FinitePrefix]: Finished finitePrefix Result has 156781 conditions, 17394 events. 9716/17394 cut-off events. For 616003/617340 co-relation queries the response was YES. Maximal size of possible extension queue 980. Compared 141515 event pairs, 346 based on Foata normal form. 853/17998 useless extension candidates. Maximal degree in co-relation 156619. Up to 4308 conditions per place. [2023-09-01 12:47:01,847 INFO L137 encePairwiseOnDemand]: 181/188 looper letters, 949 selfloop transitions, 724 changer transitions 431/2154 dead transitions. [2023-09-01 12:47:01,847 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 611 places, 2154 transitions, 45324 flow [2023-09-01 12:47:01,847 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 116 states. [2023-09-01 12:47:01,847 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 116 states. [2023-09-01 12:47:01,851 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 116 states to 116 states and 10260 transitions. [2023-09-01 12:47:01,852 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.47046955245781363 [2023-09-01 12:47:01,852 INFO L72 ComplementDD]: Start complementDD. Operand 116 states and 10260 transitions. [2023-09-01 12:47:01,852 INFO L73 IsDeterministic]: Start isDeterministic. Operand 116 states and 10260 transitions. [2023-09-01 12:47:01,853 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 12:47:01,854 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 116 states and 10260 transitions. [2023-09-01 12:47:01,859 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 117 states, 116 states have (on average 88.44827586206897) internal successors, (10260), 116 states have internal predecessors, (10260), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 12:47:01,868 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 117 states, 117 states have (on average 188.0) internal successors, (21996), 117 states have internal predecessors, (21996), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 12:47:01,869 INFO L81 ComplementDD]: Finished complementDD. Result has 117 states, 117 states have (on average 188.0) internal successors, (21996), 117 states have internal predecessors, (21996), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 12:47:01,869 INFO L175 Difference]: Start difference. First operand has 522 places, 1182 transitions, 24013 flow. Second operand 116 states and 10260 transitions. [2023-09-01 12:47:01,869 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 611 places, 2154 transitions, 45324 flow [2023-09-01 12:47:03,917 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 582 places, 2154 transitions, 43861 flow, removed 694 selfloop flow, removed 29 redundant places. [2023-09-01 12:47:03,942 INFO L231 Difference]: Finished difference. Result has 622 places, 1393 transitions, 30545 flow [2023-09-01 12:47:03,943 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=188, PETRI_DIFFERENCE_MINUEND_FLOW=22794, PETRI_DIFFERENCE_MINUEND_PLACES=467, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1182, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=502, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=640, PETRI_DIFFERENCE_SUBTRAHEND_STATES=116, PETRI_FLOW=30545, PETRI_PLACES=622, PETRI_TRANSITIONS=1393} [2023-09-01 12:47:03,943 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 592 predicate places. [2023-09-01 12:47:03,943 INFO L495 AbstractCegarLoop]: Abstraction has has 622 places, 1393 transitions, 30545 flow [2023-09-01 12:47:03,943 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 83.96666666666667) internal successors, (2519), 30 states have internal predecessors, (2519), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 12:47:03,944 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 12:47:03,944 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 12:47:03,949 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 12:47:04,147 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,19 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 12:47:04,148 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-09-01 12:47:04,148 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 12:47:04,148 INFO L85 PathProgramCache]: Analyzing trace with hash 430765921, now seen corresponding path program 15 times [2023-09-01 12:47:04,148 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 12:47:04,148 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1443399] [2023-09-01 12:47:04,148 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 12:47:04,148 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 12:47:04,170 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 12:47:04,601 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 5 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 12:47:04,601 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 12:47:04,601 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1443399] [2023-09-01 12:47:04,601 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1443399] provided 0 perfect and 1 imperfect interpolant sequences [2023-09-01 12:47:04,601 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1852603824] [2023-09-01 12:47:04,601 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-09-01 12:47:04,602 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 12:47:04,602 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-09-01 12:47:04,602 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 12:47:04,603 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 12:47:04,707 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2023-09-01 12:47:04,707 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-09-01 12:47:04,707 INFO L263 TraceCheckSpWp]: Trace formula consists of 178 conjuncts, 17 conjunts are in the unsatisfiable core [2023-09-01 12:47:04,710 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 12:47:05,303 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 12:47:05,303 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-09-01 12:47:07,558 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 12:47:07,558 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1852603824] provided 0 perfect and 2 imperfect interpolant sequences [2023-09-01 12:47:07,558 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-09-01 12:47:07,558 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 29 [2023-09-01 12:47:07,558 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [612467399] [2023-09-01 12:47:07,558 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-09-01 12:47:07,558 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2023-09-01 12:47:07,559 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 12:47:07,559 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2023-09-01 12:47:07,559 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=182, Invalid=688, Unknown=0, NotChecked=0, Total=870 [2023-09-01 12:47:07,701 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 79 out of 188 [2023-09-01 12:47:07,702 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 622 places, 1393 transitions, 30545 flow. Second operand has 30 states, 30 states have (on average 81.53333333333333) internal successors, (2446), 30 states have internal predecessors, (2446), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 12:47:07,702 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 12:47:07,702 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 79 of 188 [2023-09-01 12:47:07,702 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 12:47:26,778 INFO L130 PetriNetUnfolder]: 16607/27004 cut-off events. [2023-09-01 12:47:26,778 INFO L131 PetriNetUnfolder]: For 1188496/1188496 co-relation queries the response was YES. [2023-09-01 12:47:27,017 INFO L83 FinitePrefix]: Finished finitePrefix Result has 238234 conditions, 27004 events. 16607/27004 cut-off events. For 1188496/1188496 co-relation queries the response was YES. Maximal size of possible extension queue 1038. Compared 197778 event pairs, 1085 based on Foata normal form. 432/27436 useless extension candidates. Maximal degree in co-relation 238002. Up to 9826 conditions per place. [2023-09-01 12:47:27,117 INFO L137 encePairwiseOnDemand]: 179/188 looper letters, 1314 selfloop transitions, 728 changer transitions 533/2575 dead transitions. [2023-09-01 12:47:27,117 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 723 places, 2575 transitions, 59306 flow [2023-09-01 12:47:27,117 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 151 states. [2023-09-01 12:47:27,118 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 151 states. [2023-09-01 12:47:27,122 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 151 states to 151 states and 12931 transitions. [2023-09-01 12:47:27,124 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45550937015640414 [2023-09-01 12:47:27,124 INFO L72 ComplementDD]: Start complementDD. Operand 151 states and 12931 transitions. [2023-09-01 12:47:27,124 INFO L73 IsDeterministic]: Start isDeterministic. Operand 151 states and 12931 transitions. [2023-09-01 12:47:27,125 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 12:47:27,125 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 151 states and 12931 transitions. [2023-09-01 12:47:27,132 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 152 states, 151 states have (on average 85.63576158940397) internal successors, (12931), 151 states have internal predecessors, (12931), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 12:47:27,144 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 152 states, 152 states have (on average 188.0) internal successors, (28576), 152 states have internal predecessors, (28576), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 12:47:27,146 INFO L81 ComplementDD]: Finished complementDD. Result has 152 states, 152 states have (on average 188.0) internal successors, (28576), 152 states have internal predecessors, (28576), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 12:47:27,147 INFO L175 Difference]: Start difference. First operand has 622 places, 1393 transitions, 30545 flow. Second operand 151 states and 12931 transitions. [2023-09-01 12:47:27,147 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 723 places, 2575 transitions, 59306 flow [2023-09-01 12:47:31,818 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 674 places, 2575 transitions, 53108 flow, removed 2269 selfloop flow, removed 49 redundant places. [2023-09-01 12:47:31,849 INFO L231 Difference]: Finished difference. Result has 768 places, 1635 transitions, 36201 flow [2023-09-01 12:47:31,850 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=188, PETRI_DIFFERENCE_MINUEND_FLOW=27313, PETRI_DIFFERENCE_MINUEND_PLACES=524, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1393, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=512, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=837, PETRI_DIFFERENCE_SUBTRAHEND_STATES=151, PETRI_FLOW=36201, PETRI_PLACES=768, PETRI_TRANSITIONS=1635} [2023-09-01 12:47:31,851 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 738 predicate places. [2023-09-01 12:47:31,851 INFO L495 AbstractCegarLoop]: Abstraction has has 768 places, 1635 transitions, 36201 flow [2023-09-01 12:47:31,851 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 81.53333333333333) internal successors, (2446), 30 states have internal predecessors, (2446), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 12:47:31,851 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 12:47:31,851 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 12:47:31,858 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 12:47:32,055 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21,20 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 12:47:32,056 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-09-01 12:47:32,056 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 12:47:32,056 INFO L85 PathProgramCache]: Analyzing trace with hash -1299411541, now seen corresponding path program 16 times [2023-09-01 12:47:32,056 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 12:47:32,056 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1232969367] [2023-09-01 12:47:32,056 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 12:47:32,056 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 12:47:32,084 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 12:47:32,549 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 9 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 12:47:32,549 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 12:47:32,549 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1232969367] [2023-09-01 12:47:32,549 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1232969367] provided 0 perfect and 1 imperfect interpolant sequences [2023-09-01 12:47:32,549 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [556154742] [2023-09-01 12:47:32,549 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-09-01 12:47:32,549 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 12:47:32,550 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-09-01 12:47:32,550 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 12:47:32,553 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 12:47:32,638 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-09-01 12:47:32,639 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-09-01 12:47:32,639 INFO L263 TraceCheckSpWp]: Trace formula consists of 178 conjuncts, 17 conjunts are in the unsatisfiable core [2023-09-01 12:47:32,641 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 12:47:33,134 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 9 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 12:47:33,135 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-09-01 12:47:35,054 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 9 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 12:47:35,054 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [556154742] provided 0 perfect and 2 imperfect interpolant sequences [2023-09-01 12:47:35,054 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-09-01 12:47:35,054 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 29 [2023-09-01 12:47:35,054 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1217673228] [2023-09-01 12:47:35,054 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-09-01 12:47:35,055 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2023-09-01 12:47:35,055 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 12:47:35,055 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2023-09-01 12:47:35,055 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=176, Invalid=694, Unknown=0, NotChecked=0, Total=870 [2023-09-01 12:47:35,228 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 82 out of 188 [2023-09-01 12:47:35,229 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 768 places, 1635 transitions, 36201 flow. Second operand has 30 states, 30 states have (on average 83.9) internal successors, (2517), 30 states have internal predecessors, (2517), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 12:47:35,229 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 12:47:35,229 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 82 of 188 [2023-09-01 12:47:35,229 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 12:47:53,137 INFO L130 PetriNetUnfolder]: 12954/23226 cut-off events. [2023-09-01 12:47:53,137 INFO L131 PetriNetUnfolder]: For 4575187/4578688 co-relation queries the response was YES. [2023-09-01 12:47:53,470 INFO L83 FinitePrefix]: Finished finitePrefix Result has 327468 conditions, 23226 events. 12954/23226 cut-off events. For 4575187/4578688 co-relation queries the response was YES. Maximal size of possible extension queue 1058. Compared 194912 event pairs, 532 based on Foata normal form. 963/23915 useless extension candidates. Maximal degree in co-relation 325855. Up to 5874 conditions per place. [2023-09-01 12:47:53,573 INFO L137 encePairwiseOnDemand]: 181/188 looper letters, 1292 selfloop transitions, 791 changer transitions 561/2704 dead transitions. [2023-09-01 12:47:53,573 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 808 places, 2704 transitions, 68816 flow [2023-09-01 12:47:53,573 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 121 states. [2023-09-01 12:47:53,573 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 121 states. [2023-09-01 12:47:53,577 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 121 states to 121 states and 10787 transitions. [2023-09-01 12:47:53,578 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.47419553367329 [2023-09-01 12:47:53,578 INFO L72 ComplementDD]: Start complementDD. Operand 121 states and 10787 transitions. [2023-09-01 12:47:53,578 INFO L73 IsDeterministic]: Start isDeterministic. Operand 121 states and 10787 transitions. [2023-09-01 12:47:53,579 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 12:47:53,579 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 121 states and 10787 transitions. [2023-09-01 12:47:53,585 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 122 states, 121 states have (on average 89.14876033057851) internal successors, (10787), 121 states have internal predecessors, (10787), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 12:47:53,594 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 122 states, 122 states have (on average 188.0) internal successors, (22936), 122 states have internal predecessors, (22936), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 12:47:53,595 INFO L81 ComplementDD]: Finished complementDD. Result has 122 states, 122 states have (on average 188.0) internal successors, (22936), 122 states have internal predecessors, (22936), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 12:47:53,595 INFO L175 Difference]: Start difference. First operand has 768 places, 1635 transitions, 36201 flow. Second operand 121 states and 10787 transitions. [2023-09-01 12:47:53,595 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 808 places, 2704 transitions, 68816 flow [2023-09-01 12:48:20,416 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 709 places, 2704 transitions, 58281 flow, removed 5224 selfloop flow, removed 99 redundant places. [2023-09-01 12:48:20,451 INFO L231 Difference]: Finished difference. Result has 760 places, 1826 transitions, 41852 flow [2023-09-01 12:48:20,452 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=188, PETRI_DIFFERENCE_MINUEND_FLOW=34148, PETRI_DIFFERENCE_MINUEND_PLACES=589, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1635, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=597, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=960, PETRI_DIFFERENCE_SUBTRAHEND_STATES=121, PETRI_FLOW=41852, PETRI_PLACES=760, PETRI_TRANSITIONS=1826} [2023-09-01 12:48:20,452 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 730 predicate places. [2023-09-01 12:48:20,452 INFO L495 AbstractCegarLoop]: Abstraction has has 760 places, 1826 transitions, 41852 flow [2023-09-01 12:48:20,453 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 83.9) internal successors, (2517), 30 states have internal predecessors, (2517), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 12:48:20,453 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 12:48:20,453 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 12:48:20,459 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Forceful destruction successful, exit code 0 [2023-09-01 12:48:20,657 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable22 [2023-09-01 12:48:20,657 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-09-01 12:48:20,657 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 12:48:20,657 INFO L85 PathProgramCache]: Analyzing trace with hash 807146657, now seen corresponding path program 17 times [2023-09-01 12:48:20,658 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 12:48:20,658 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [96318373] [2023-09-01 12:48:20,658 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 12:48:20,658 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 12:48:20,679 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 12:48:21,301 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 3 proven. 26 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 12:48:21,301 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 12:48:21,302 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [96318373] [2023-09-01 12:48:21,302 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [96318373] provided 0 perfect and 1 imperfect interpolant sequences [2023-09-01 12:48:21,302 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1477576445] [2023-09-01 12:48:21,302 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-09-01 12:48:21,302 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 12:48:21,303 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-09-01 12:48:21,303 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 12:48:21,305 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 12:48:21,407 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2023-09-01 12:48:21,407 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-09-01 12:48:21,408 INFO L263 TraceCheckSpWp]: Trace formula consists of 178 conjuncts, 17 conjunts are in the unsatisfiable core [2023-09-01 12:48:21,410 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 12:48:22,036 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 3 proven. 26 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 12:48:22,036 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-09-01 12:48:23,835 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 3 proven. 26 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 12:48:23,835 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1477576445] provided 0 perfect and 2 imperfect interpolant sequences [2023-09-01 12:48:23,835 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-09-01 12:48:23,835 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 29 [2023-09-01 12:48:23,836 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1026406836] [2023-09-01 12:48:23,836 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-09-01 12:48:23,836 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2023-09-01 12:48:23,836 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 12:48:23,837 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2023-09-01 12:48:23,837 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=179, Invalid=691, Unknown=0, NotChecked=0, Total=870 [2023-09-01 12:48:23,980 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 82 out of 188 [2023-09-01 12:48:23,981 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 760 places, 1826 transitions, 41852 flow. Second operand has 30 states, 30 states have (on average 84.16666666666667) internal successors, (2525), 30 states have internal predecessors, (2525), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 12:48:23,982 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 12:48:23,982 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 82 of 188 [2023-09-01 12:48:23,982 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 12:48:41,102 INFO L130 PetriNetUnfolder]: 13659/24346 cut-off events. [2023-09-01 12:48:41,102 INFO L131 PetriNetUnfolder]: For 1792669/1794613 co-relation queries the response was YES. [2023-09-01 12:48:41,393 INFO L83 FinitePrefix]: Finished finitePrefix Result has 273373 conditions, 24346 events. 13659/24346 cut-off events. For 1792669/1794613 co-relation queries the response was YES. Maximal size of possible extension queue 1138. Compared 205465 event pairs, 504 based on Foata normal form. 1113/25086 useless extension candidates. Maximal degree in co-relation 273146. Up to 6345 conditions per place. [2023-09-01 12:48:41,494 INFO L137 encePairwiseOnDemand]: 181/188 looper letters, 1377 selfloop transitions, 921 changer transitions 481/2837 dead transitions. [2023-09-01 12:48:41,494 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 821 places, 2837 transitions, 70294 flow [2023-09-01 12:48:41,494 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 116 states. [2023-09-01 12:48:41,494 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 116 states. [2023-09-01 12:48:41,498 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 116 states to 116 states and 10261 transitions. [2023-09-01 12:48:41,499 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.470515407190022 [2023-09-01 12:48:41,499 INFO L72 ComplementDD]: Start complementDD. Operand 116 states and 10261 transitions. [2023-09-01 12:48:41,499 INFO L73 IsDeterministic]: Start isDeterministic. Operand 116 states and 10261 transitions. [2023-09-01 12:48:41,500 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 12:48:41,500 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 116 states and 10261 transitions. [2023-09-01 12:48:41,505 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 117 states, 116 states have (on average 88.45689655172414) internal successors, (10261), 116 states have internal predecessors, (10261), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 12:48:41,514 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 117 states, 117 states have (on average 188.0) internal successors, (21996), 117 states have internal predecessors, (21996), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 12:48:41,515 INFO L81 ComplementDD]: Finished complementDD. Result has 117 states, 117 states have (on average 188.0) internal successors, (21996), 117 states have internal predecessors, (21996), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 12:48:41,515 INFO L175 Difference]: Start difference. First operand has 760 places, 1826 transitions, 41852 flow. Second operand 116 states and 10261 transitions. [2023-09-01 12:48:41,515 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 821 places, 2837 transitions, 70294 flow [2023-09-01 12:49:07,758 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 765 places, 2837 transitions, 64903 flow, removed 2565 selfloop flow, removed 56 redundant places. [2023-09-01 12:49:07,796 INFO L231 Difference]: Finished difference. Result has 803 places, 1988 transitions, 47475 flow [2023-09-01 12:49:07,797 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=188, PETRI_DIFFERENCE_MINUEND_FLOW=39623, PETRI_DIFFERENCE_MINUEND_PLACES=650, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1826, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=708, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=1064, PETRI_DIFFERENCE_SUBTRAHEND_STATES=116, PETRI_FLOW=47475, PETRI_PLACES=803, PETRI_TRANSITIONS=1988} [2023-09-01 12:49:07,798 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 773 predicate places. [2023-09-01 12:49:07,798 INFO L495 AbstractCegarLoop]: Abstraction has has 803 places, 1988 transitions, 47475 flow [2023-09-01 12:49:07,798 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 84.16666666666667) internal successors, (2525), 30 states have internal predecessors, (2525), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 12:49:07,799 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 12:49:07,799 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 12:49:07,803 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Ended with exit code 0 [2023-09-01 12:49:08,003 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable23 [2023-09-01 12:49:08,003 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-09-01 12:49:08,003 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 12:49:08,003 INFO L85 PathProgramCache]: Analyzing trace with hash -275210114, now seen corresponding path program 18 times [2023-09-01 12:49:08,003 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 12:49:08,003 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [131432158] [2023-09-01 12:49:08,003 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 12:49:08,004 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 12:49:08,023 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 12:49:08,676 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 7 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 12:49:08,676 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 12:49:08,676 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [131432158] [2023-09-01 12:49:08,677 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [131432158] provided 0 perfect and 1 imperfect interpolant sequences [2023-09-01 12:49:08,677 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1869998610] [2023-09-01 12:49:08,677 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-09-01 12:49:08,677 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 12:49:08,677 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-09-01 12:49:08,678 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 12:49:08,679 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 12:49:08,794 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2023-09-01 12:49:08,795 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-09-01 12:49:08,795 INFO L263 TraceCheckSpWp]: Trace formula consists of 178 conjuncts, 17 conjunts are in the unsatisfiable core [2023-09-01 12:49:08,797 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 12:49:09,384 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 12:49:09,384 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-09-01 12:49:11,432 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 12:49:11,432 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1869998610] provided 0 perfect and 2 imperfect interpolant sequences [2023-09-01 12:49:11,433 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-09-01 12:49:11,433 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 29 [2023-09-01 12:49:11,433 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [773303479] [2023-09-01 12:49:11,433 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-09-01 12:49:11,433 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2023-09-01 12:49:11,433 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 12:49:11,434 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2023-09-01 12:49:11,434 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=183, Invalid=687, Unknown=0, NotChecked=0, Total=870 [2023-09-01 12:49:11,627 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 79 out of 188 [2023-09-01 12:49:11,629 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 803 places, 1988 transitions, 47475 flow. Second operand has 30 states, 30 states have (on average 81.53333333333333) internal successors, (2446), 30 states have internal predecessors, (2446), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 12:49:11,629 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 12:49:11,629 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 79 of 188 [2023-09-01 12:49:11,629 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 12:49:34,747 INFO L130 PetriNetUnfolder]: 21364/34655 cut-off events. [2023-09-01 12:49:34,748 INFO L131 PetriNetUnfolder]: For 1746303/1746303 co-relation queries the response was YES. [2023-09-01 12:49:35,264 INFO L83 FinitePrefix]: Finished finitePrefix Result has 319123 conditions, 34655 events. 21364/34655 cut-off events. For 1746303/1746303 co-relation queries the response was YES. Maximal size of possible extension queue 1223. Compared 259934 event pairs, 1591 based on Foata normal form. 610/35265 useless extension candidates. Maximal degree in co-relation 318868. Up to 14042 conditions per place. [2023-09-01 12:49:35,393 INFO L137 encePairwiseOnDemand]: 179/188 looper letters, 1552 selfloop transitions, 849 changer transitions 660/3061 dead transitions. [2023-09-01 12:49:35,393 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 884 places, 3061 transitions, 75847 flow [2023-09-01 12:49:35,393 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 125 states. [2023-09-01 12:49:35,393 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 125 states. [2023-09-01 12:49:35,397 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 125 states to 125 states and 10704 transitions. [2023-09-01 12:49:35,398 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45548936170212767 [2023-09-01 12:49:35,398 INFO L72 ComplementDD]: Start complementDD. Operand 125 states and 10704 transitions. [2023-09-01 12:49:35,398 INFO L73 IsDeterministic]: Start isDeterministic. Operand 125 states and 10704 transitions. [2023-09-01 12:49:35,399 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 12:49:35,399 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 125 states and 10704 transitions. [2023-09-01 12:49:35,405 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 126 states, 125 states have (on average 85.632) internal successors, (10704), 125 states have internal predecessors, (10704), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 12:49:35,413 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 126 states, 126 states have (on average 188.0) internal successors, (23688), 126 states have internal predecessors, (23688), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 12:49:35,414 INFO L81 ComplementDD]: Finished complementDD. Result has 126 states, 126 states have (on average 188.0) internal successors, (23688), 126 states have internal predecessors, (23688), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 12:49:35,414 INFO L175 Difference]: Start difference. First operand has 803 places, 1988 transitions, 47475 flow. Second operand 125 states and 10704 transitions. [2023-09-01 12:49:35,414 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 884 places, 3061 transitions, 75847 flow [2023-09-01 12:49:48,043 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 831 places, 3061 transitions, 71385 flow, removed 2115 selfloop flow, removed 53 redundant places. [2023-09-01 12:49:48,085 INFO L231 Difference]: Finished difference. Result has 904 places, 2030 transitions, 49688 flow [2023-09-01 12:49:48,086 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=188, PETRI_DIFFERENCE_MINUEND_FLOW=44949, PETRI_DIFFERENCE_MINUEND_PLACES=707, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1988, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=714, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=1214, PETRI_DIFFERENCE_SUBTRAHEND_STATES=125, PETRI_FLOW=49688, PETRI_PLACES=904, PETRI_TRANSITIONS=2030} [2023-09-01 12:49:48,087 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 874 predicate places. [2023-09-01 12:49:48,087 INFO L495 AbstractCegarLoop]: Abstraction has has 904 places, 2030 transitions, 49688 flow [2023-09-01 12:49:48,087 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 81.53333333333333) internal successors, (2446), 30 states have internal predecessors, (2446), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 12:49:48,087 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 12:49:48,087 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 12:49:48,093 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 12:49:48,292 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24,23 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 12:49:48,292 INFO L420 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-09-01 12:49:48,293 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 12:49:48,293 INFO L85 PathProgramCache]: Analyzing trace with hash 400638337, now seen corresponding path program 19 times [2023-09-01 12:49:48,293 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 12:49:48,293 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [975953480] [2023-09-01 12:49:48,293 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 12:49:48,293 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 12:49:48,317 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 12:49:48,725 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 5 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 12:49:48,725 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 12:49:48,725 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [975953480] [2023-09-01 12:49:48,725 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [975953480] provided 0 perfect and 1 imperfect interpolant sequences [2023-09-01 12:49:48,725 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [223064758] [2023-09-01 12:49:48,725 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-09-01 12:49:48,725 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 12:49:48,726 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-09-01 12:49:48,726 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 12:49:48,730 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 12:49:48,825 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 12:49:48,826 INFO L263 TraceCheckSpWp]: Trace formula consists of 178 conjuncts, 17 conjunts are in the unsatisfiable core [2023-09-01 12:49:48,828 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 12:49:49,331 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 5 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 12:49:49,331 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-09-01 12:49:51,300 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 5 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 12:49:51,300 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [223064758] provided 0 perfect and 2 imperfect interpolant sequences [2023-09-01 12:49:51,300 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-09-01 12:49:51,300 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 29 [2023-09-01 12:49:51,300 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [835595027] [2023-09-01 12:49:51,300 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-09-01 12:49:51,300 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2023-09-01 12:49:51,301 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 12:49:51,301 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2023-09-01 12:49:51,301 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=184, Invalid=686, Unknown=0, NotChecked=0, Total=870 [2023-09-01 12:49:51,457 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 82 out of 188 [2023-09-01 12:49:51,458 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 904 places, 2030 transitions, 49688 flow. Second operand has 30 states, 30 states have (on average 84.1) internal successors, (2523), 30 states have internal predecessors, (2523), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 12:49:51,458 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 12:49:51,458 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 82 of 188 [2023-09-01 12:49:51,458 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 12:50:12,644 INFO L130 PetriNetUnfolder]: 15901/28575 cut-off events. [2023-09-01 12:50:12,648 INFO L131 PetriNetUnfolder]: For 4385103/4389689 co-relation queries the response was YES. [2023-09-01 12:50:13,322 INFO L83 FinitePrefix]: Finished finitePrefix Result has 395416 conditions, 28575 events. 15901/28575 cut-off events. For 4385103/4389689 co-relation queries the response was YES. Maximal size of possible extension queue 1279. Compared 247918 event pairs, 658 based on Foata normal form. 1096/29358 useless extension candidates. Maximal degree in co-relation 394137. Up to 8255 conditions per place. [2023-09-01 12:50:13,460 INFO L137 encePairwiseOnDemand]: 181/188 looper letters, 1587 selfloop transitions, 964 changer transitions 458/3079 dead transitions. [2023-09-01 12:50:13,460 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 938 places, 3079 transitions, 84422 flow [2023-09-01 12:50:13,460 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 107 states. [2023-09-01 12:50:13,461 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 107 states. [2023-09-01 12:50:13,464 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 107 states to 107 states and 9538 transitions. [2023-09-01 12:50:13,465 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.47414993040365877 [2023-09-01 12:50:13,465 INFO L72 ComplementDD]: Start complementDD. Operand 107 states and 9538 transitions. [2023-09-01 12:50:13,465 INFO L73 IsDeterministic]: Start isDeterministic. Operand 107 states and 9538 transitions. [2023-09-01 12:50:13,466 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 12:50:13,466 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 107 states and 9538 transitions. [2023-09-01 12:50:13,471 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 108 states, 107 states have (on average 89.14018691588785) internal successors, (9538), 107 states have internal predecessors, (9538), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 12:50:13,478 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 108 states, 108 states have (on average 188.0) internal successors, (20304), 108 states have internal predecessors, (20304), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 12:50:13,479 INFO L81 ComplementDD]: Finished complementDD. Result has 108 states, 108 states have (on average 188.0) internal successors, (20304), 108 states have internal predecessors, (20304), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 12:50:13,479 INFO L175 Difference]: Start difference. First operand has 904 places, 2030 transitions, 49688 flow. Second operand 107 states and 9538 transitions. [2023-09-01 12:50:13,480 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 938 places, 3079 transitions, 84422 flow [2023-09-01 12:50:38,373 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 845 places, 3079 transitions, 78465 flow, removed 2799 selfloop flow, removed 93 redundant places. [2023-09-01 12:50:38,416 INFO L231 Difference]: Finished difference. Result has 886 places, 2303 transitions, 59871 flow [2023-09-01 12:50:38,417 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=188, PETRI_DIFFERENCE_MINUEND_FLOW=48335, PETRI_DIFFERENCE_MINUEND_PLACES=739, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=2030, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=711, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=1265, PETRI_DIFFERENCE_SUBTRAHEND_STATES=107, PETRI_FLOW=59871, PETRI_PLACES=886, PETRI_TRANSITIONS=2303} [2023-09-01 12:50:38,417 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 856 predicate places. [2023-09-01 12:50:38,417 INFO L495 AbstractCegarLoop]: Abstraction has has 886 places, 2303 transitions, 59871 flow [2023-09-01 12:50:38,418 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 84.1) internal successors, (2523), 30 states have internal predecessors, (2523), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 12:50:38,418 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 12:50:38,418 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 12:50:38,424 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 12:50:38,618 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25,24 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 12:50:38,618 INFO L420 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-09-01 12:50:38,618 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 12:50:38,618 INFO L85 PathProgramCache]: Analyzing trace with hash -1581172496, now seen corresponding path program 20 times [2023-09-01 12:50:38,619 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 12:50:38,619 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [953656037] [2023-09-01 12:50:38,619 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 12:50:38,619 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 12:50:38,642 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 12:50:39,022 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 7 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 12:50:39,022 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 12:50:39,022 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [953656037] [2023-09-01 12:50:39,022 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [953656037] provided 0 perfect and 1 imperfect interpolant sequences [2023-09-01 12:50:39,023 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [966098535] [2023-09-01 12:50:39,023 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-09-01 12:50:39,023 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 12:50:39,023 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-09-01 12:50:39,024 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 12:50:39,026 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 12:50:39,128 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-09-01 12:50:39,128 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-09-01 12:50:39,129 INFO L263 TraceCheckSpWp]: Trace formula consists of 178 conjuncts, 17 conjunts are in the unsatisfiable core [2023-09-01 12:50:39,131 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 12:50:39,623 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 12:50:39,624 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-09-01 12:50:41,726 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 12:50:41,727 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [966098535] provided 0 perfect and 2 imperfect interpolant sequences [2023-09-01 12:50:41,727 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-09-01 12:50:41,727 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 29 [2023-09-01 12:50:41,727 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1488057665] [2023-09-01 12:50:41,727 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-09-01 12:50:41,727 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2023-09-01 12:50:41,727 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 12:50:41,728 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2023-09-01 12:50:41,728 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=181, Invalid=689, Unknown=0, NotChecked=0, Total=870 [2023-09-01 12:50:41,885 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 79 out of 188 [2023-09-01 12:50:41,886 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 886 places, 2303 transitions, 59871 flow. Second operand has 30 states, 30 states have (on average 81.53333333333333) internal successors, (2446), 30 states have internal predecessors, (2446), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 12:50:41,886 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 12:50:41,886 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 79 of 188 [2023-09-01 12:50:41,886 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 12:51:14,740 INFO L130 PetriNetUnfolder]: 26177/42514 cut-off events. [2023-09-01 12:51:14,741 INFO L131 PetriNetUnfolder]: For 2950710/2950710 co-relation queries the response was YES. [2023-09-01 12:51:15,907 INFO L83 FinitePrefix]: Finished finitePrefix Result has 451543 conditions, 42514 events. 26177/42514 cut-off events. For 2950710/2950710 co-relation queries the response was YES. Maximal size of possible extension queue 1514. Compared 330759 event pairs, 2159 based on Foata normal form. 478/42992 useless extension candidates. Maximal degree in co-relation 450802. Up to 17754 conditions per place. [2023-09-01 12:51:16,092 INFO L137 encePairwiseOnDemand]: 179/188 looper letters, 1931 selfloop transitions, 1084 changer transitions 589/3604 dead transitions. [2023-09-01 12:51:16,093 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 1005 places, 3604 transitions, 100701 flow [2023-09-01 12:51:16,093 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 156 states. [2023-09-01 12:51:16,093 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 156 states. [2023-09-01 12:51:16,097 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 156 states to 156 states and 13356 transitions. [2023-09-01 12:51:16,099 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4554009819967267 [2023-09-01 12:51:16,099 INFO L72 ComplementDD]: Start complementDD. Operand 156 states and 13356 transitions. [2023-09-01 12:51:16,099 INFO L73 IsDeterministic]: Start isDeterministic. Operand 156 states and 13356 transitions. [2023-09-01 12:51:16,100 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 12:51:16,100 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 156 states and 13356 transitions. [2023-09-01 12:51:16,107 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 157 states, 156 states have (on average 85.61538461538461) internal successors, (13356), 156 states have internal predecessors, (13356), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 12:51:16,118 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 157 states, 157 states have (on average 188.0) internal successors, (29516), 157 states have internal predecessors, (29516), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 12:51:16,120 INFO L81 ComplementDD]: Finished complementDD. Result has 157 states, 157 states have (on average 188.0) internal successors, (29516), 157 states have internal predecessors, (29516), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 12:51:16,120 INFO L175 Difference]: Start difference. First operand has 886 places, 2303 transitions, 59871 flow. Second operand 156 states and 13356 transitions. [2023-09-01 12:51:16,120 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 1005 places, 3604 transitions, 100701 flow [2023-09-01 12:51:49,753 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 955 places, 3604 transitions, 95550 flow, removed 2490 selfloop flow, removed 50 redundant places. [2023-09-01 12:51:49,804 INFO L231 Difference]: Finished difference. Result has 1054 places, 2568 transitions, 70036 flow [2023-09-01 12:51:49,806 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=188, PETRI_DIFFERENCE_MINUEND_FLOW=56992, PETRI_DIFFERENCE_MINUEND_PLACES=800, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=2303, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=831, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=1420, PETRI_DIFFERENCE_SUBTRAHEND_STATES=156, PETRI_FLOW=70036, PETRI_PLACES=1054, PETRI_TRANSITIONS=2568} [2023-09-01 12:51:49,806 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 1024 predicate places. [2023-09-01 12:51:49,806 INFO L495 AbstractCegarLoop]: Abstraction has has 1054 places, 2568 transitions, 70036 flow [2023-09-01 12:51:49,806 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 81.53333333333333) internal successors, (2446), 30 states have internal predecessors, (2446), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 12:51:49,806 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 12:51:49,807 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 12:51:49,814 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Forceful destruction successful, exit code 0 [2023-09-01 12:51:50,011 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 25 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2023-09-01 12:51:50,011 INFO L420 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-09-01 12:51:50,012 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 12:51:50,012 INFO L85 PathProgramCache]: Analyzing trace with hash -1670714576, now seen corresponding path program 21 times [2023-09-01 12:51:50,012 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 12:51:50,012 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [796902254] [2023-09-01 12:51:50,012 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 12:51:50,012 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 12:51:50,032 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 12:51:50,505 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 7 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 12:51:50,505 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 12:51:50,505 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [796902254] [2023-09-01 12:51:50,505 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [796902254] provided 0 perfect and 1 imperfect interpolant sequences [2023-09-01 12:51:50,505 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1904646672] [2023-09-01 12:51:50,505 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-09-01 12:51:50,506 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 12:51:50,506 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-09-01 12:51:50,506 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 12:51:50,509 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 12:51:50,634 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 8 check-sat command(s) [2023-09-01 12:51:50,634 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-09-01 12:51:50,635 INFO L263 TraceCheckSpWp]: Trace formula consists of 178 conjuncts, 17 conjunts are in the unsatisfiable core [2023-09-01 12:51:50,637 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 12:51:51,119 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 12:51:51,120 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-09-01 12:51:53,176 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 12:51:53,176 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1904646672] provided 0 perfect and 2 imperfect interpolant sequences [2023-09-01 12:51:53,176 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-09-01 12:51:53,177 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 29 [2023-09-01 12:51:53,177 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1211158016] [2023-09-01 12:51:53,177 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-09-01 12:51:53,177 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2023-09-01 12:51:53,177 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 12:51:53,177 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2023-09-01 12:51:53,178 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=173, Invalid=697, Unknown=0, NotChecked=0, Total=870 [2023-09-01 12:51:53,352 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 79 out of 188 [2023-09-01 12:51:53,353 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 1054 places, 2568 transitions, 70036 flow. Second operand has 30 states, 30 states have (on average 81.53333333333333) internal successors, (2446), 30 states have internal predecessors, (2446), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 12:51:53,353 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 12:51:53,353 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 79 of 188 [2023-09-01 12:51:53,353 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 12:52:30,945 INFO L130 PetriNetUnfolder]: 28007/45386 cut-off events. [2023-09-01 12:52:30,945 INFO L131 PetriNetUnfolder]: For 9721797/9721797 co-relation queries the response was YES. [2023-09-01 12:52:32,943 INFO L83 FinitePrefix]: Finished finitePrefix Result has 608466 conditions, 45386 events. 28007/45386 cut-off events. For 9721797/9721797 co-relation queries the response was YES. Maximal size of possible extension queue 1610. Compared 355309 event pairs, 2423 based on Foata normal form. 812/46198 useless extension candidates. Maximal degree in co-relation 607950. Up to 19158 conditions per place. [2023-09-01 12:52:33,302 INFO L137 encePairwiseOnDemand]: 179/188 looper letters, 1975 selfloop transitions, 1017 changer transitions 857/3849 dead transitions. [2023-09-01 12:52:33,302 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 1110 places, 3849 transitions, 116127 flow [2023-09-01 12:52:33,303 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 145 states. [2023-09-01 12:52:33,303 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 145 states. [2023-09-01 12:52:33,307 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 145 states to 145 states and 12387 transitions. [2023-09-01 12:52:33,308 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4544020542920029 [2023-09-01 12:52:33,308 INFO L72 ComplementDD]: Start complementDD. Operand 145 states and 12387 transitions. [2023-09-01 12:52:33,308 INFO L73 IsDeterministic]: Start isDeterministic. Operand 145 states and 12387 transitions. [2023-09-01 12:52:33,309 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 12:52:33,309 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 145 states and 12387 transitions. [2023-09-01 12:52:33,316 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 146 states, 145 states have (on average 85.42758620689655) internal successors, (12387), 145 states have internal predecessors, (12387), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 12:52:33,326 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 146 states, 146 states have (on average 188.0) internal successors, (27448), 146 states have internal predecessors, (27448), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 12:52:33,327 INFO L81 ComplementDD]: Finished complementDD. Result has 146 states, 146 states have (on average 188.0) internal successors, (27448), 146 states have internal predecessors, (27448), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 12:52:33,327 INFO L175 Difference]: Start difference. First operand has 1054 places, 2568 transitions, 70036 flow. Second operand 145 states and 12387 transitions. [2023-09-01 12:52:33,327 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 1110 places, 3849 transitions, 116127 flow [2023-09-01 12:53:41,829 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 1013 places, 3849 transitions, 105767 flow, removed 5107 selfloop flow, removed 97 redundant places. [2023-09-01 12:53:41,884 INFO L231 Difference]: Finished difference. Result has 1106 places, 2623 transitions, 73299 flow [2023-09-01 12:53:41,885 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=188, PETRI_DIFFERENCE_MINUEND_FLOW=66374, PETRI_DIFFERENCE_MINUEND_PLACES=869, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=2568, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=849, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=1659, PETRI_DIFFERENCE_SUBTRAHEND_STATES=145, PETRI_FLOW=73299, PETRI_PLACES=1106, PETRI_TRANSITIONS=2623} [2023-09-01 12:53:41,886 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 1076 predicate places. [2023-09-01 12:53:41,886 INFO L495 AbstractCegarLoop]: Abstraction has has 1106 places, 2623 transitions, 73299 flow [2023-09-01 12:53:41,886 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 81.53333333333333) internal successors, (2446), 30 states have internal predecessors, (2446), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 12:53:41,886 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 12:53:41,887 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 12:53:41,893 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Forceful destruction successful, exit code 0 [2023-09-01 12:53:42,091 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27 [2023-09-01 12:53:42,091 INFO L420 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-09-01 12:53:42,091 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 12:53:42,091 INFO L85 PathProgramCache]: Analyzing trace with hash -2055918567, now seen corresponding path program 22 times [2023-09-01 12:53:42,091 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 12:53:42,091 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1619450665] [2023-09-01 12:53:42,091 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 12:53:42,092 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 12:53:42,111 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 12:53:42,578 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 5 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 12:53:42,578 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 12:53:42,578 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1619450665] [2023-09-01 12:53:42,578 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1619450665] provided 0 perfect and 1 imperfect interpolant sequences [2023-09-01 12:53:42,578 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [870889315] [2023-09-01 12:53:42,578 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-09-01 12:53:42,578 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 12:53:42,579 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-09-01 12:53:42,594 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 12:53:42,596 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 12:53:42,692 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-09-01 12:53:42,693 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-09-01 12:53:42,693 INFO L263 TraceCheckSpWp]: Trace formula consists of 178 conjuncts, 17 conjunts are in the unsatisfiable core [2023-09-01 12:53:42,695 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 12:53:43,189 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 5 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 12:53:43,190 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-09-01 12:53:45,123 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 5 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 12:53:45,124 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [870889315] provided 0 perfect and 2 imperfect interpolant sequences [2023-09-01 12:53:45,124 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-09-01 12:53:45,124 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 29 [2023-09-01 12:53:45,124 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1031821892] [2023-09-01 12:53:45,124 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-09-01 12:53:45,124 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2023-09-01 12:53:45,125 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 12:53:45,125 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2023-09-01 12:53:45,125 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=181, Invalid=689, Unknown=0, NotChecked=0, Total=870 [2023-09-01 12:53:45,269 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 82 out of 188 [2023-09-01 12:53:45,270 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 1106 places, 2623 transitions, 73299 flow. Second operand has 30 states, 30 states have (on average 84.1) internal successors, (2523), 30 states have internal predecessors, (2523), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 12:53:45,271 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 12:53:45,271 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 82 of 188 [2023-09-01 12:53:45,271 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 12:54:13,980 INFO L130 PetriNetUnfolder]: 18879/33865 cut-off events. [2023-09-01 12:54:13,980 INFO L131 PetriNetUnfolder]: For 9904962/9911900 co-relation queries the response was YES. [2023-09-01 12:54:15,099 INFO L83 FinitePrefix]: Finished finitePrefix Result has 561211 conditions, 33865 events. 18879/33865 cut-off events. For 9904962/9911900 co-relation queries the response was YES. Maximal size of possible extension queue 1521. Compared 299077 event pairs, 1472 based on Foata normal form. 1360/34900 useless extension candidates. Maximal degree in co-relation 560015. Up to 11044 conditions per place. [2023-09-01 12:54:15,285 INFO L137 encePairwiseOnDemand]: 181/188 looper letters, 1968 selfloop transitions, 991 changer transitions 451/3497 dead transitions. [2023-09-01 12:54:15,285 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 1113 places, 3497 transitions, 108495 flow [2023-09-01 12:54:15,285 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 92 states. [2023-09-01 12:54:15,285 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 92 states. [2023-09-01 12:54:15,288 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 92 states to 92 states and 8200 transitions. [2023-09-01 12:54:15,289 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.47409805735430155 [2023-09-01 12:54:15,289 INFO L72 ComplementDD]: Start complementDD. Operand 92 states and 8200 transitions. [2023-09-01 12:54:15,289 INFO L73 IsDeterministic]: Start isDeterministic. Operand 92 states and 8200 transitions. [2023-09-01 12:54:15,290 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 12:54:15,290 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 92 states and 8200 transitions. [2023-09-01 12:54:15,294 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 93 states, 92 states have (on average 89.1304347826087) internal successors, (8200), 92 states have internal predecessors, (8200), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 12:54:15,300 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 93 states, 93 states have (on average 188.0) internal successors, (17484), 93 states have internal predecessors, (17484), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 12:54:15,301 INFO L81 ComplementDD]: Finished complementDD. Result has 93 states, 93 states have (on average 188.0) internal successors, (17484), 93 states have internal predecessors, (17484), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 12:54:15,301 INFO L175 Difference]: Start difference. First operand has 1106 places, 2623 transitions, 73299 flow. Second operand 92 states and 8200 transitions. [2023-09-01 12:54:15,301 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 1113 places, 3497 transitions, 108495 flow [2023-09-01 12:55:08,134 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 1009 places, 3497 transitions, 100336 flow, removed 3987 selfloop flow, removed 104 redundant places. [2023-09-01 12:55:08,189 INFO L231 Difference]: Finished difference. Result has 1048 places, 2755 transitions, 79329 flow [2023-09-01 12:55:08,190 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=188, PETRI_DIFFERENCE_MINUEND_FLOW=70528, PETRI_DIFFERENCE_MINUEND_PLACES=918, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=2623, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=793, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=1746, PETRI_DIFFERENCE_SUBTRAHEND_STATES=92, PETRI_FLOW=79329, PETRI_PLACES=1048, PETRI_TRANSITIONS=2755} [2023-09-01 12:55:08,191 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 1018 predicate places. [2023-09-01 12:55:08,191 INFO L495 AbstractCegarLoop]: Abstraction has has 1048 places, 2755 transitions, 79329 flow [2023-09-01 12:55:08,192 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 84.1) internal successors, (2523), 30 states have internal predecessors, (2523), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 12:55:08,192 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 12:55:08,192 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 12:55:08,196 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 12:55:08,393 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2023-09-01 12:55:08,393 INFO L420 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-09-01 12:55:08,393 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 12:55:08,393 INFO L85 PathProgramCache]: Analyzing trace with hash 189166611, now seen corresponding path program 23 times [2023-09-01 12:55:08,393 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 12:55:08,393 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [693373026] [2023-09-01 12:55:08,393 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 12:55:08,393 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 12:55:08,413 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 12:55:08,813 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 9 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 12:55:08,813 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 12:55:08,814 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [693373026] [2023-09-01 12:55:08,814 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [693373026] provided 0 perfect and 1 imperfect interpolant sequences [2023-09-01 12:55:08,814 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [993880596] [2023-09-01 12:55:08,814 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-09-01 12:55:08,814 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 12:55:08,815 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-09-01 12:55:08,815 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 12:55:08,821 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 12:55:08,919 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2023-09-01 12:55:08,919 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-09-01 12:55:08,919 INFO L263 TraceCheckSpWp]: Trace formula consists of 178 conjuncts, 17 conjunts are in the unsatisfiable core [2023-09-01 12:55:08,921 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 12:55:09,383 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 9 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 12:55:09,383 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-09-01 12:55:11,153 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 9 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 12:55:11,154 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [993880596] provided 0 perfect and 2 imperfect interpolant sequences [2023-09-01 12:55:11,154 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-09-01 12:55:11,154 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 30 [2023-09-01 12:55:11,154 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1167097621] [2023-09-01 12:55:11,154 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-09-01 12:55:11,154 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2023-09-01 12:55:11,154 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 12:55:11,155 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2023-09-01 12:55:11,155 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=203, Invalid=727, Unknown=0, NotChecked=0, Total=930 [2023-09-01 12:55:11,298 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 82 out of 188 [2023-09-01 12:55:11,300 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 1048 places, 2755 transitions, 79329 flow. Second operand has 31 states, 31 states have (on average 84.06451612903226) internal successors, (2606), 31 states have internal predecessors, (2606), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 12:55:11,300 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 12:55:11,300 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 82 of 188 [2023-09-01 12:55:11,300 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 12:55:39,067 INFO L130 PetriNetUnfolder]: 19446/35108 cut-off events. [2023-09-01 12:55:39,068 INFO L131 PetriNetUnfolder]: For 4493799/4498618 co-relation queries the response was YES. [2023-09-01 12:55:40,175 INFO L83 FinitePrefix]: Finished finitePrefix Result has 476897 conditions, 35108 events. 19446/35108 cut-off events. For 4493799/4498618 co-relation queries the response was YES. Maximal size of possible extension queue 1572. Compared 315773 event pairs, 1294 based on Foata normal form. 1263/36027 useless extension candidates. Maximal degree in co-relation 476564. Up to 12893 conditions per place. [2023-09-01 12:55:40,458 INFO L137 encePairwiseOnDemand]: 181/188 looper letters, 2167 selfloop transitions, 859 changer transitions 488/3601 dead transitions. [2023-09-01 12:55:40,458 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 1119 places, 3601 transitions, 109615 flow [2023-09-01 12:55:40,458 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 99 states. [2023-09-01 12:55:40,459 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 99 states. [2023-09-01 12:55:40,461 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 99 states to 99 states and 8831 transitions. [2023-09-01 12:55:40,462 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4744788308618096 [2023-09-01 12:55:40,462 INFO L72 ComplementDD]: Start complementDD. Operand 99 states and 8831 transitions. [2023-09-01 12:55:40,463 INFO L73 IsDeterministic]: Start isDeterministic. Operand 99 states and 8831 transitions. [2023-09-01 12:55:40,463 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 12:55:40,463 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 99 states and 8831 transitions. [2023-09-01 12:55:40,468 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 100 states, 99 states have (on average 89.20202020202021) internal successors, (8831), 99 states have internal predecessors, (8831), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 12:55:40,475 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 100 states, 100 states have (on average 188.0) internal successors, (18800), 100 states have internal predecessors, (18800), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 12:55:40,476 INFO L81 ComplementDD]: Finished complementDD. Result has 100 states, 100 states have (on average 188.0) internal successors, (18800), 100 states have internal predecessors, (18800), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 12:55:40,476 INFO L175 Difference]: Start difference. First operand has 1048 places, 2755 transitions, 79329 flow. Second operand 99 states and 8831 transitions. [2023-09-01 12:55:40,476 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 1119 places, 3601 transitions, 109615 flow [2023-09-01 12:56:14,250 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 1078 places, 3601 transitions, 107577 flow, removed 918 selfloop flow, removed 41 redundant places. [2023-09-01 12:56:14,308 INFO L231 Difference]: Finished difference. Result has 1107 places, 2862 transitions, 84208 flow [2023-09-01 12:56:14,309 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=188, PETRI_DIFFERENCE_MINUEND_FLOW=77467, PETRI_DIFFERENCE_MINUEND_PLACES=980, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=2755, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=734, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=2007, PETRI_DIFFERENCE_SUBTRAHEND_STATES=99, PETRI_FLOW=84208, PETRI_PLACES=1107, PETRI_TRANSITIONS=2862} [2023-09-01 12:56:14,309 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 1077 predicate places. [2023-09-01 12:56:14,309 INFO L495 AbstractCegarLoop]: Abstraction has has 1107 places, 2862 transitions, 84208 flow [2023-09-01 12:56:14,310 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 31 states have (on average 84.06451612903226) internal successors, (2606), 31 states have internal predecessors, (2606), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 12:56:14,310 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 12:56:14,310 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 12:56:14,316 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 12:56:14,510 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,28 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 12:56:14,510 INFO L420 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-09-01 12:56:14,510 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 12:56:14,511 INFO L85 PathProgramCache]: Analyzing trace with hash 226689989, now seen corresponding path program 24 times [2023-09-01 12:56:14,511 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 12:56:14,511 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [399310364] [2023-09-01 12:56:14,511 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 12:56:14,511 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 12:56:14,533 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 12:56:14,913 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 9 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 12:56:14,913 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 12:56:14,913 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [399310364] [2023-09-01 12:56:14,913 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [399310364] provided 0 perfect and 1 imperfect interpolant sequences [2023-09-01 12:56:14,913 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1999002845] [2023-09-01 12:56:14,913 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-09-01 12:56:14,914 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 12:56:14,914 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-09-01 12:56:14,915 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 12:56:14,916 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 12:56:15,047 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2023-09-01 12:56:15,047 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-09-01 12:56:15,048 INFO L263 TraceCheckSpWp]: Trace formula consists of 178 conjuncts, 17 conjunts are in the unsatisfiable core [2023-09-01 12:56:15,050 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 12:56:15,499 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 9 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 12:56:15,499 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-09-01 12:56:17,290 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 9 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 12:56:17,291 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1999002845] provided 0 perfect and 2 imperfect interpolant sequences [2023-09-01 12:56:17,291 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-09-01 12:56:17,291 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 30 [2023-09-01 12:56:17,291 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1172792349] [2023-09-01 12:56:17,291 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-09-01 12:56:17,291 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2023-09-01 12:56:17,291 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 12:56:17,292 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2023-09-01 12:56:17,292 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=205, Invalid=725, Unknown=0, NotChecked=0, Total=930 [2023-09-01 12:56:17,451 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 82 out of 188 [2023-09-01 12:56:17,452 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 1107 places, 2862 transitions, 84208 flow. Second operand has 31 states, 31 states have (on average 84.06451612903226) internal successors, (2606), 31 states have internal predecessors, (2606), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 12:56:17,452 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 12:56:17,452 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 82 of 188 [2023-09-01 12:56:17,452 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 12:56:48,165 INFO L130 PetriNetUnfolder]: 20014/36228 cut-off events. [2023-09-01 12:56:48,165 INFO L131 PetriNetUnfolder]: For 5354716/5359327 co-relation queries the response was YES. [2023-09-01 12:56:49,165 INFO L83 FinitePrefix]: Finished finitePrefix Result has 507628 conditions, 36228 events. 20014/36228 cut-off events. For 5354716/5359327 co-relation queries the response was YES. Maximal size of possible extension queue 1607. Compared 328129 event pairs, 1308 based on Foata normal form. 1317/37199 useless extension candidates. Maximal degree in co-relation 506136. Up to 13144 conditions per place. [2023-09-01 12:56:49,341 INFO L137 encePairwiseOnDemand]: 181/188 looper letters, 2201 selfloop transitions, 904 changer transitions 540/3728 dead transitions. [2023-09-01 12:56:49,342 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 1160 places, 3728 transitions, 116237 flow [2023-09-01 12:56:49,342 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 102 states. [2023-09-01 12:56:49,342 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 102 states. [2023-09-01 12:56:49,345 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 102 states to 102 states and 9090 transitions. [2023-09-01 12:56:49,346 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4740300375469337 [2023-09-01 12:56:49,346 INFO L72 ComplementDD]: Start complementDD. Operand 102 states and 9090 transitions. [2023-09-01 12:56:49,346 INFO L73 IsDeterministic]: Start isDeterministic. Operand 102 states and 9090 transitions. [2023-09-01 12:56:49,347 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 12:56:49,347 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 102 states and 9090 transitions. [2023-09-01 12:56:49,351 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 103 states, 102 states have (on average 89.11764705882354) internal successors, (9090), 102 states have internal predecessors, (9090), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 12:56:49,358 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 103 states, 103 states have (on average 188.0) internal successors, (19364), 103 states have internal predecessors, (19364), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 12:56:49,359 INFO L81 ComplementDD]: Finished complementDD. Result has 103 states, 103 states have (on average 188.0) internal successors, (19364), 103 states have internal predecessors, (19364), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 12:56:49,359 INFO L175 Difference]: Start difference. First operand has 1107 places, 2862 transitions, 84208 flow. Second operand 102 states and 9090 transitions. [2023-09-01 12:56:49,359 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 1160 places, 3728 transitions, 116237 flow [2023-09-01 12:57:41,372 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 1115 places, 3728 transitions, 113444 flow, removed 1303 selfloop flow, removed 45 redundant places. [2023-09-01 12:57:41,431 INFO L231 Difference]: Finished difference. Result has 1139 places, 2897 transitions, 87581 flow [2023-09-01 12:57:41,433 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=188, PETRI_DIFFERENCE_MINUEND_FLOW=82479, PETRI_DIFFERENCE_MINUEND_PLACES=1014, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=2862, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=785, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=2065, PETRI_DIFFERENCE_SUBTRAHEND_STATES=102, PETRI_FLOW=87581, PETRI_PLACES=1139, PETRI_TRANSITIONS=2897} [2023-09-01 12:57:41,433 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 1109 predicate places. [2023-09-01 12:57:41,433 INFO L495 AbstractCegarLoop]: Abstraction has has 1139 places, 2897 transitions, 87581 flow [2023-09-01 12:57:41,433 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 31 states have (on average 84.06451612903226) internal successors, (2606), 31 states have internal predecessors, (2606), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 12:57:41,433 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 12:57:41,434 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 12:57:41,438 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 12:57:41,638 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30,29 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 12:57:41,638 INFO L420 AbstractCegarLoop]: === Iteration 32 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-09-01 12:57:41,638 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 12:57:41,638 INFO L85 PathProgramCache]: Analyzing trace with hash -1984821604, now seen corresponding path program 25 times [2023-09-01 12:57:41,638 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 12:57:41,638 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1957829746] [2023-09-01 12:57:41,638 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 12:57:41,639 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 12:57:41,660 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 12:57:42,069 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 5 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 12:57:42,069 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 12:57:42,069 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1957829746] [2023-09-01 12:57:42,070 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1957829746] provided 0 perfect and 1 imperfect interpolant sequences [2023-09-01 12:57:42,070 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1704527165] [2023-09-01 12:57:42,070 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-09-01 12:57:42,070 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 12:57:42,070 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-09-01 12:57:42,071 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 12:57:42,073 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 12:57:42,183 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 12:57:42,184 INFO L263 TraceCheckSpWp]: Trace formula consists of 178 conjuncts, 17 conjunts are in the unsatisfiable core [2023-09-01 12:57:42,186 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 12:57:42,618 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 5 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 12:57:42,618 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-09-01 12:57:44,447 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 5 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 12:57:44,447 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1704527165] provided 0 perfect and 2 imperfect interpolant sequences [2023-09-01 12:57:44,447 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-09-01 12:57:44,447 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 29 [2023-09-01 12:57:44,448 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1789245996] [2023-09-01 12:57:44,448 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-09-01 12:57:44,448 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2023-09-01 12:57:44,448 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 12:57:44,448 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2023-09-01 12:57:44,448 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=185, Invalid=685, Unknown=0, NotChecked=0, Total=870 [2023-09-01 12:57:44,567 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 82 out of 188 [2023-09-01 12:57:44,568 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 1139 places, 2897 transitions, 87581 flow. Second operand has 30 states, 30 states have (on average 84.06666666666666) internal successors, (2522), 30 states have internal predecessors, (2522), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 12:57:44,568 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 12:57:44,568 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 82 of 188 [2023-09-01 12:57:44,568 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand Killed by 15