./Ultimate.py --spec /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/properties/unreach-call.prp --file /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/weaver/popl20-prod-cons.wvr.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 4a390ef5 Calling Ultimate with: /root/.sdkman/candidates/java/current/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 /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/weaver/popl20-prod-cons.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 --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 7225a3dc80a635bdf8bc0a0aebf3fff6c385d87e3635c30eb2fdc2ad9b10efb0 --- Real Ultimate output --- This is Ultimate 0.2.5-dev-4a390ef-m [2024-10-24 12:36:18,034 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-10-24 12:36:18,086 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2024-10-24 12:36:18,091 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-10-24 12:36:18,094 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-10-24 12:36:18,118 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-10-24 12:36:18,120 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-10-24 12:36:18,120 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-10-24 12:36:18,120 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-10-24 12:36:18,122 INFO L153 SettingsManager]: * Use memory slicer=true [2024-10-24 12:36:18,122 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-10-24 12:36:18,123 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-10-24 12:36:18,123 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-10-24 12:36:18,125 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-10-24 12:36:18,125 INFO L153 SettingsManager]: * Use SBE=true [2024-10-24 12:36:18,125 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-10-24 12:36:18,125 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-10-24 12:36:18,125 INFO L153 SettingsManager]: * sizeof long=4 [2024-10-24 12:36:18,126 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-10-24 12:36:18,126 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-10-24 12:36:18,126 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-10-24 12:36:18,130 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-10-24 12:36:18,130 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-10-24 12:36:18,130 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-10-24 12:36:18,130 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-10-24 12:36:18,131 INFO L153 SettingsManager]: * sizeof long double=12 [2024-10-24 12:36:18,131 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-10-24 12:36:18,131 INFO L153 SettingsManager]: * Use constant arrays=true [2024-10-24 12:36:18,131 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-10-24 12:36:18,131 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-10-24 12:36:18,131 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-10-24 12:36:18,132 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-10-24 12:36:18,132 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-10-24 12:36:18,132 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-10-24 12:36:18,132 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-10-24 12:36:18,132 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-10-24 12:36:18,132 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-10-24 12:36:18,133 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-10-24 12:36:18,133 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-10-24 12:36:18,133 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-10-24 12:36:18,135 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-10-24 12:36:18,135 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-10-24 12:36:18,135 INFO L153 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 7225a3dc80a635bdf8bc0a0aebf3fff6c385d87e3635c30eb2fdc2ad9b10efb0 [2024-10-24 12:36:18,384 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-10-24 12:36:18,420 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-10-24 12:36:18,424 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-10-24 12:36:18,425 INFO L270 PluginConnector]: Initializing CDTParser... [2024-10-24 12:36:18,426 INFO L274 PluginConnector]: CDTParser initialized [2024-10-24 12:36:18,427 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/weaver/popl20-prod-cons.wvr.c [2024-10-24 12:36:19,839 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-10-24 12:36:20,087 INFO L384 CDTParser]: Found 1 translation units. [2024-10-24 12:36:20,095 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/weaver/popl20-prod-cons.wvr.c [2024-10-24 12:36:20,107 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/17ca5e250/e8728867c02141dbb2c811abeab7fbad/FLAG8ce24b26e [2024-10-24 12:36:20,428 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/17ca5e250/e8728867c02141dbb2c811abeab7fbad [2024-10-24 12:36:20,433 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-10-24 12:36:20,434 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2024-10-24 12:36:20,435 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-10-24 12:36:20,438 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-10-24 12:36:20,445 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-10-24 12:36:20,449 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.10 12:36:20" (1/1) ... [2024-10-24 12:36:20,450 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1811b604 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 12:36:20, skipping insertion in model container [2024-10-24 12:36:20,455 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.10 12:36:20" (1/1) ... [2024-10-24 12:36:20,498 INFO L175 MainTranslator]: Built tables and reachable declarations [2024-10-24 12:36:20,831 WARN L248 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/weaver/popl20-prod-cons.wvr.c[3095,3108] [2024-10-24 12:36:20,843 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-10-24 12:36:20,889 INFO L200 MainTranslator]: Completed pre-run [2024-10-24 12:36:20,943 WARN L248 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/weaver/popl20-prod-cons.wvr.c[3095,3108] [2024-10-24 12:36:20,952 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-10-24 12:36:20,979 INFO L204 MainTranslator]: Completed translation [2024-10-24 12:36:20,983 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 12:36:20 WrapperNode [2024-10-24 12:36:20,983 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-10-24 12:36:20,985 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-10-24 12:36:20,989 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-10-24 12:36:20,989 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-10-24 12:36:20,994 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 12:36:20" (1/1) ... [2024-10-24 12:36:21,012 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 12:36:20" (1/1) ... [2024-10-24 12:36:21,053 INFO L138 Inliner]: procedures = 24, calls = 35, calls flagged for inlining = 10, calls inlined = 10, statements flattened = 156 [2024-10-24 12:36:21,054 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-10-24 12:36:21,054 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-10-24 12:36:21,058 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-10-24 12:36:21,058 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-10-24 12:36:21,071 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 12:36:20" (1/1) ... [2024-10-24 12:36:21,071 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 12:36:20" (1/1) ... [2024-10-24 12:36:21,073 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 12:36:20" (1/1) ... [2024-10-24 12:36:21,098 INFO L175 MemorySlicer]: Split 5 memory accesses to 2 slices as follows [2, 3]. 60 percent of accesses are in the largest equivalence class. The 2 initializations are split as follows [2, 0]. The 1 writes are split as follows [0, 1]. [2024-10-24 12:36:21,103 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 12:36:20" (1/1) ... [2024-10-24 12:36:21,104 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 12:36:20" (1/1) ... [2024-10-24 12:36:21,108 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 12:36:20" (1/1) ... [2024-10-24 12:36:21,119 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 12:36:20" (1/1) ... [2024-10-24 12:36:21,120 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 12:36:20" (1/1) ... [2024-10-24 12:36:21,121 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 12:36:20" (1/1) ... [2024-10-24 12:36:21,123 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-10-24 12:36:21,127 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-10-24 12:36:21,127 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-10-24 12:36:21,127 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-10-24 12:36:21,128 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 12:36:20" (1/1) ... [2024-10-24 12:36:21,140 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-10-24 12:36:21,158 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-24 12:36:21,188 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (exit command is (exit), workingDir is null) [2024-10-24 12:36:21,198 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Waiting until timeout for monitored process [2024-10-24 12:36:21,232 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-10-24 12:36:21,233 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2024-10-24 12:36:21,233 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2024-10-24 12:36:21,233 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2024-10-24 12:36:21,233 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2024-10-24 12:36:21,233 INFO L130 BoogieDeclarations]: Found specification of procedure thread3 [2024-10-24 12:36:21,233 INFO L138 BoogieDeclarations]: Found implementation of procedure thread3 [2024-10-24 12:36:21,234 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-10-24 12:36:21,234 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#1 [2024-10-24 12:36:21,234 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#0 [2024-10-24 12:36:21,234 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#1 [2024-10-24 12:36:21,234 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2024-10-24 12:36:21,234 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2024-10-24 12:36:21,234 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2024-10-24 12:36:21,234 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-10-24 12:36:21,235 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-10-24 12:36:21,235 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#0 [2024-10-24 12:36:21,235 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#1 [2024-10-24 12:36:21,236 WARN L207 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement. [2024-10-24 12:36:21,334 INFO L238 CfgBuilder]: Building ICFG [2024-10-24 12:36:21,336 INFO L264 CfgBuilder]: Building CFG for each procedure with an implementation [2024-10-24 12:36:21,580 INFO L283 CfgBuilder]: Omitted future-live optimization because the input is a concurrent program. [2024-10-24 12:36:21,581 INFO L287 CfgBuilder]: Performing block encoding [2024-10-24 12:36:21,723 INFO L309 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-10-24 12:36:21,723 INFO L314 CfgBuilder]: Removed 3 assume(true) statements. [2024-10-24 12:36:21,723 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.10 12:36:21 BoogieIcfgContainer [2024-10-24 12:36:21,724 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-10-24 12:36:21,725 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-10-24 12:36:21,725 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-10-24 12:36:21,728 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-10-24 12:36:21,728 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 24.10 12:36:20" (1/3) ... [2024-10-24 12:36:21,728 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5605c69b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.10 12:36:21, skipping insertion in model container [2024-10-24 12:36:21,729 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 12:36:20" (2/3) ... [2024-10-24 12:36:21,729 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5605c69b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.10 12:36:21, skipping insertion in model container [2024-10-24 12:36:21,729 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.10 12:36:21" (3/3) ... [2024-10-24 12:36:21,730 INFO L112 eAbstractionObserver]: Analyzing ICFG popl20-prod-cons.wvr.c [2024-10-24 12:36:21,742 INFO L209 ceAbstractionStarter]: Automizer settings: Hoare:LoopHeads NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-10-24 12:36:21,743 INFO L149 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2024-10-24 12:36:21,743 INFO L484 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2024-10-24 12:36:21,775 INFO L143 ThreadInstanceAdder]: Constructed 3 joinOtherThreadTransitions. [2024-10-24 12:36:21,802 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 43 places, 37 transitions, 95 flow [2024-10-24 12:36:21,825 INFO L124 PetriNetUnfolderBase]: 4/34 cut-off events. [2024-10-24 12:36:21,826 INFO L125 PetriNetUnfolderBase]: For 3/3 co-relation queries the response was YES. [2024-10-24 12:36:21,828 INFO L83 FinitePrefix]: Finished finitePrefix Result has 47 conditions, 34 events. 4/34 cut-off events. For 3/3 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 60 event pairs, 0 based on Foata normal form. 0/29 useless extension candidates. Maximal degree in co-relation 28. Up to 2 conditions per place. [2024-10-24 12:36:21,830 INFO L82 GeneralOperation]: Start removeDead. Operand has 43 places, 37 transitions, 95 flow [2024-10-24 12:36:21,833 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 39 places, 33 transitions, 84 flow [2024-10-24 12:36:21,842 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-10-24 12:36:21,852 INFO L333 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, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopHeads, 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;@6a0be388, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-10-24 12:36:21,852 INFO L334 AbstractCegarLoop]: Starting to check reachability of 4 error locations. [2024-10-24 12:36:21,861 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2024-10-24 12:36:21,861 INFO L124 PetriNetUnfolderBase]: 4/32 cut-off events. [2024-10-24 12:36:21,861 INFO L125 PetriNetUnfolderBase]: For 3/3 co-relation queries the response was YES. [2024-10-24 12:36:21,861 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-24 12:36:21,862 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-24 12:36:21,862 INFO L396 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)] === [2024-10-24 12:36:21,867 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-24 12:36:21,867 INFO L85 PathProgramCache]: Analyzing trace with hash 1998691310, now seen corresponding path program 1 times [2024-10-24 12:36:21,874 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-24 12:36:21,874 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1406622743] [2024-10-24 12:36:21,874 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-24 12:36:21,875 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-24 12:36:21,995 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-24 12:36:22,410 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-24 12:36:22,412 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-24 12:36:22,412 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1406622743] [2024-10-24 12:36:22,413 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1406622743] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-24 12:36:22,413 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-24 12:36:22,414 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-10-24 12:36:22,415 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [46900704] [2024-10-24 12:36:22,416 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-24 12:36:22,422 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-10-24 12:36:22,427 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-24 12:36:22,445 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-10-24 12:36:22,445 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2024-10-24 12:36:22,457 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 37 [2024-10-24 12:36:22,459 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 39 places, 33 transitions, 84 flow. Second operand has 5 states, 5 states have (on average 15.8) internal successors, (79), 5 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-24 12:36:22,460 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-24 12:36:22,460 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 37 [2024-10-24 12:36:22,460 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-24 12:36:22,703 INFO L124 PetriNetUnfolderBase]: 778/1290 cut-off events. [2024-10-24 12:36:22,704 INFO L125 PetriNetUnfolderBase]: For 103/103 co-relation queries the response was YES. [2024-10-24 12:36:22,708 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2582 conditions, 1290 events. 778/1290 cut-off events. For 103/103 co-relation queries the response was YES. Maximal size of possible extension queue 84. Compared 6682 event pairs, 296 based on Foata normal form. 2/1249 useless extension candidates. Maximal degree in co-relation 2346. Up to 517 conditions per place. [2024-10-24 12:36:22,713 INFO L140 encePairwiseOnDemand]: 32/37 looper letters, 46 selfloop transitions, 4 changer transitions 3/62 dead transitions. [2024-10-24 12:36:22,714 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 43 places, 62 transitions, 269 flow [2024-10-24 12:36:22,715 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-10-24 12:36:22,717 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-10-24 12:36:22,721 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 115 transitions. [2024-10-24 12:36:22,723 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.6216216216216216 [2024-10-24 12:36:22,724 INFO L175 Difference]: Start difference. First operand has 39 places, 33 transitions, 84 flow. Second operand 5 states and 115 transitions. [2024-10-24 12:36:22,725 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 43 places, 62 transitions, 269 flow [2024-10-24 12:36:22,728 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 37 places, 62 transitions, 243 flow, removed 0 selfloop flow, removed 6 redundant places. [2024-10-24 12:36:22,730 INFO L231 Difference]: Finished difference. Result has 39 places, 35 transitions, 96 flow [2024-10-24 12:36:22,732 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=37, PETRI_DIFFERENCE_MINUEND_FLOW=72, PETRI_DIFFERENCE_MINUEND_PLACES=33, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=33, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=29, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=96, PETRI_PLACES=39, PETRI_TRANSITIONS=35} [2024-10-24 12:36:22,734 INFO L277 CegarLoopForPetriNet]: 39 programPoint places, 0 predicate places. [2024-10-24 12:36:22,735 INFO L471 AbstractCegarLoop]: Abstraction has has 39 places, 35 transitions, 96 flow [2024-10-24 12:36:22,735 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 15.8) internal successors, (79), 5 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-24 12:36:22,735 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-24 12:36:22,735 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-24 12:36:22,735 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-10-24 12:36:22,736 INFO L396 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)] === [2024-10-24 12:36:22,736 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-24 12:36:22,736 INFO L85 PathProgramCache]: Analyzing trace with hash 832852343, now seen corresponding path program 1 times [2024-10-24 12:36:22,736 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-24 12:36:22,737 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1519707679] [2024-10-24 12:36:22,737 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-24 12:36:22,737 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-24 12:36:22,751 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-24 12:36:22,807 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-24 12:36:22,807 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-24 12:36:22,808 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1519707679] [2024-10-24 12:36:22,808 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1519707679] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-24 12:36:22,808 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-24 12:36:22,808 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-10-24 12:36:22,808 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1844394698] [2024-10-24 12:36:22,808 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-24 12:36:22,809 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-10-24 12:36:22,809 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-24 12:36:22,809 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-10-24 12:36:22,810 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-10-24 12:36:22,810 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 37 [2024-10-24 12:36:22,810 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 39 places, 35 transitions, 96 flow. Second operand has 3 states, 3 states have (on average 20.333333333333332) internal successors, (61), 3 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-24 12:36:22,810 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-24 12:36:22,811 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 37 [2024-10-24 12:36:22,811 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-24 12:36:22,943 INFO L124 PetriNetUnfolderBase]: 566/1077 cut-off events. [2024-10-24 12:36:22,943 INFO L125 PetriNetUnfolderBase]: For 44/44 co-relation queries the response was YES. [2024-10-24 12:36:22,945 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2077 conditions, 1077 events. 566/1077 cut-off events. For 44/44 co-relation queries the response was YES. Maximal size of possible extension queue 59. Compared 5616 event pairs, 231 based on Foata normal form. 18/1034 useless extension candidates. Maximal degree in co-relation 1223. Up to 614 conditions per place. [2024-10-24 12:36:22,947 INFO L140 encePairwiseOnDemand]: 34/37 looper letters, 27 selfloop transitions, 2 changer transitions 7/49 dead transitions. [2024-10-24 12:36:22,947 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 41 places, 49 transitions, 201 flow [2024-10-24 12:36:22,948 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-10-24 12:36:22,948 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-10-24 12:36:22,948 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 79 transitions. [2024-10-24 12:36:22,949 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.7117117117117117 [2024-10-24 12:36:22,950 INFO L175 Difference]: Start difference. First operand has 39 places, 35 transitions, 96 flow. Second operand 3 states and 79 transitions. [2024-10-24 12:36:22,950 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 41 places, 49 transitions, 201 flow [2024-10-24 12:36:22,951 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 39 places, 49 transitions, 197 flow, removed 0 selfloop flow, removed 2 redundant places. [2024-10-24 12:36:22,953 INFO L231 Difference]: Finished difference. Result has 40 places, 36 transitions, 104 flow [2024-10-24 12:36:22,953 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=37, PETRI_DIFFERENCE_MINUEND_FLOW=92, PETRI_DIFFERENCE_MINUEND_PLACES=37, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=35, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=33, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=104, PETRI_PLACES=40, PETRI_TRANSITIONS=36} [2024-10-24 12:36:22,954 INFO L277 CegarLoopForPetriNet]: 39 programPoint places, 1 predicate places. [2024-10-24 12:36:22,954 INFO L471 AbstractCegarLoop]: Abstraction has has 40 places, 36 transitions, 104 flow [2024-10-24 12:36:22,954 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 20.333333333333332) internal successors, (61), 3 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-24 12:36:22,954 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-24 12:36:22,955 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-24 12:36:22,955 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-10-24 12:36:22,955 INFO L396 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)] === [2024-10-24 12:36:22,955 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-24 12:36:22,955 INFO L85 PathProgramCache]: Analyzing trace with hash 1617767189, now seen corresponding path program 1 times [2024-10-24 12:36:22,956 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-24 12:36:22,956 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [86883604] [2024-10-24 12:36:22,956 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-24 12:36:22,956 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-24 12:36:22,969 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-24 12:36:23,055 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-10-24 12:36:23,056 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-24 12:36:23,056 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [86883604] [2024-10-24 12:36:23,056 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [86883604] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-24 12:36:23,056 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-24 12:36:23,056 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-10-24 12:36:23,056 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [591989308] [2024-10-24 12:36:23,056 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-24 12:36:23,057 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-10-24 12:36:23,057 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-24 12:36:23,057 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-10-24 12:36:23,057 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-10-24 12:36:23,057 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 37 [2024-10-24 12:36:23,058 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 40 places, 36 transitions, 104 flow. Second operand has 4 states, 4 states have (on average 19.25) internal successors, (77), 4 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-24 12:36:23,058 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-24 12:36:23,058 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 37 [2024-10-24 12:36:23,058 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-24 12:36:23,175 INFO L124 PetriNetUnfolderBase]: 679/1306 cut-off events. [2024-10-24 12:36:23,175 INFO L125 PetriNetUnfolderBase]: For 163/163 co-relation queries the response was YES. [2024-10-24 12:36:23,178 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2604 conditions, 1306 events. 679/1306 cut-off events. For 163/163 co-relation queries the response was YES. Maximal size of possible extension queue 71. Compared 7777 event pairs, 580 based on Foata normal form. 15/1162 useless extension candidates. Maximal degree in co-relation 1526. Up to 823 conditions per place. [2024-10-24 12:36:23,181 INFO L140 encePairwiseOnDemand]: 33/37 looper letters, 22 selfloop transitions, 2 changer transitions 16/53 dead transitions. [2024-10-24 12:36:23,181 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 43 places, 53 transitions, 226 flow [2024-10-24 12:36:23,181 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-10-24 12:36:23,182 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-10-24 12:36:23,183 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 96 transitions. [2024-10-24 12:36:23,184 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.6486486486486487 [2024-10-24 12:36:23,185 INFO L175 Difference]: Start difference. First operand has 40 places, 36 transitions, 104 flow. Second operand 4 states and 96 transitions. [2024-10-24 12:36:23,185 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 43 places, 53 transitions, 226 flow [2024-10-24 12:36:23,186 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 42 places, 53 transitions, 224 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-10-24 12:36:23,187 INFO L231 Difference]: Finished difference. Result has 44 places, 37 transitions, 116 flow [2024-10-24 12:36:23,187 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=37, PETRI_DIFFERENCE_MINUEND_FLOW=102, PETRI_DIFFERENCE_MINUEND_PLACES=39, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=36, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=34, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=116, PETRI_PLACES=44, PETRI_TRANSITIONS=37} [2024-10-24 12:36:23,188 INFO L277 CegarLoopForPetriNet]: 39 programPoint places, 5 predicate places. [2024-10-24 12:36:23,188 INFO L471 AbstractCegarLoop]: Abstraction has has 44 places, 37 transitions, 116 flow [2024-10-24 12:36:23,189 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 19.25) internal successors, (77), 4 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-24 12:36:23,189 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-24 12:36:23,189 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-24 12:36:23,189 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2024-10-24 12:36:23,189 INFO L396 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)] === [2024-10-24 12:36:23,190 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-24 12:36:23,190 INFO L85 PathProgramCache]: Analyzing trace with hash -450042783, now seen corresponding path program 1 times [2024-10-24 12:36:23,190 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-24 12:36:23,190 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1784114742] [2024-10-24 12:36:23,190 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-24 12:36:23,191 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-24 12:36:23,211 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-24 12:36:23,315 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-10-24 12:36:23,315 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-24 12:36:23,315 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1784114742] [2024-10-24 12:36:23,315 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1784114742] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-24 12:36:23,315 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1181524529] [2024-10-24 12:36:23,316 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-24 12:36:23,316 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-24 12:36:23,316 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-24 12:36:23,317 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) [2024-10-24 12:36:23,321 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2024-10-24 12:36:23,391 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-24 12:36:23,393 INFO L255 TraceCheckSpWp]: Trace formula consists of 194 conjuncts, 28 conjuncts are in the unsatisfiable core [2024-10-24 12:36:23,397 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-24 12:36:23,458 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 1 [2024-10-24 12:36:23,782 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-24 12:36:23,783 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-24 12:36:24,322 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 40 treesize of output 36 [2024-10-24 12:36:24,334 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-10-24 12:36:24,335 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 50 treesize of output 46 [2024-10-24 12:36:24,429 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-24 12:36:24,429 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1181524529] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-24 12:36:24,430 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-24 12:36:24,430 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 10, 10] total 20 [2024-10-24 12:36:24,430 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1640616055] [2024-10-24 12:36:24,430 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-24 12:36:24,431 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2024-10-24 12:36:24,431 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-24 12:36:24,431 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2024-10-24 12:36:24,432 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=341, Unknown=0, NotChecked=0, Total=420 [2024-10-24 12:36:24,485 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 37 [2024-10-24 12:36:24,486 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 44 places, 37 transitions, 116 flow. Second operand has 21 states, 21 states have (on average 12.857142857142858) internal successors, (270), 21 states have internal predecessors, (270), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-24 12:36:24,486 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-24 12:36:24,486 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 37 [2024-10-24 12:36:24,486 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-24 12:36:27,974 INFO L124 PetriNetUnfolderBase]: 5178/8594 cut-off events. [2024-10-24 12:36:27,974 INFO L125 PetriNetUnfolderBase]: For 2223/2223 co-relation queries the response was YES. [2024-10-24 12:36:27,985 INFO L83 FinitePrefix]: Finished finitePrefix Result has 18901 conditions, 8594 events. 5178/8594 cut-off events. For 2223/2223 co-relation queries the response was YES. Maximal size of possible extension queue 270. Compared 54768 event pairs, 482 based on Foata normal form. 565/8638 useless extension candidates. Maximal degree in co-relation 18885. Up to 1207 conditions per place. [2024-10-24 12:36:28,002 INFO L140 encePairwiseOnDemand]: 23/37 looper letters, 339 selfloop transitions, 109 changer transitions 151/605 dead transitions. [2024-10-24 12:36:28,002 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 108 places, 605 transitions, 2833 flow [2024-10-24 12:36:28,003 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 66 states. [2024-10-24 12:36:28,003 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 66 states. [2024-10-24 12:36:28,010 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 66 states and 1208 transitions. [2024-10-24 12:36:28,011 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.49467649467649466 [2024-10-24 12:36:28,011 INFO L175 Difference]: Start difference. First operand has 44 places, 37 transitions, 116 flow. Second operand 66 states and 1208 transitions. [2024-10-24 12:36:28,011 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 108 places, 605 transitions, 2833 flow [2024-10-24 12:36:28,021 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 106 places, 605 transitions, 2801 flow, removed 15 selfloop flow, removed 2 redundant places. [2024-10-24 12:36:28,026 INFO L231 Difference]: Finished difference. Result has 150 places, 167 transitions, 1094 flow [2024-10-24 12:36:28,027 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=37, PETRI_DIFFERENCE_MINUEND_FLOW=110, PETRI_DIFFERENCE_MINUEND_PLACES=41, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=37, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=11, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=20, PETRI_DIFFERENCE_SUBTRAHEND_STATES=66, PETRI_FLOW=1094, PETRI_PLACES=150, PETRI_TRANSITIONS=167} [2024-10-24 12:36:28,027 INFO L277 CegarLoopForPetriNet]: 39 programPoint places, 111 predicate places. [2024-10-24 12:36:28,028 INFO L471 AbstractCegarLoop]: Abstraction has has 150 places, 167 transitions, 1094 flow [2024-10-24 12:36:28,028 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 12.857142857142858) internal successors, (270), 21 states have internal predecessors, (270), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-24 12:36:28,028 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-24 12:36:28,028 INFO L204 CegarLoopForPetriNet]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-24 12:36:28,043 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2024-10-24 12:36:28,232 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-24 12:36:28,233 INFO L396 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)] === [2024-10-24 12:36:28,234 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-24 12:36:28,234 INFO L85 PathProgramCache]: Analyzing trace with hash -285273189, now seen corresponding path program 2 times [2024-10-24 12:36:28,234 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-24 12:36:28,234 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1212431137] [2024-10-24 12:36:28,235 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-24 12:36:28,235 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-24 12:36:28,294 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-24 12:36:29,596 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-24 12:36:29,596 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-24 12:36:29,597 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1212431137] [2024-10-24 12:36:29,597 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1212431137] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-24 12:36:29,597 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1008422292] [2024-10-24 12:36:29,597 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-10-24 12:36:29,597 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-24 12:36:29,598 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-24 12:36:29,599 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) [2024-10-24 12:36:29,604 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2024-10-24 12:36:29,701 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-10-24 12:36:29,702 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-10-24 12:36:29,703 INFO L255 TraceCheckSpWp]: Trace formula consists of 221 conjuncts, 28 conjuncts are in the unsatisfiable core [2024-10-24 12:36:29,704 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-24 12:36:30,145 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-10-24 12:36:30,146 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-24 12:36:30,250 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-10-24 12:36:30,251 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 20 [2024-10-24 12:36:30,435 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2024-10-24 12:36:30,436 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1008422292] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-24 12:36:30,436 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-24 12:36:30,436 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13, 10] total 33 [2024-10-24 12:36:30,436 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1480566820] [2024-10-24 12:36:30,436 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-24 12:36:30,437 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2024-10-24 12:36:30,437 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-24 12:36:30,437 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2024-10-24 12:36:30,438 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=155, Invalid=967, Unknown=0, NotChecked=0, Total=1122 [2024-10-24 12:36:30,636 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 37 [2024-10-24 12:36:30,636 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 150 places, 167 transitions, 1094 flow. Second operand has 34 states, 34 states have (on average 10.588235294117647) internal successors, (360), 34 states have internal predecessors, (360), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-24 12:36:30,636 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-24 12:36:30,637 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 37 [2024-10-24 12:36:30,637 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-24 12:36:33,388 INFO L124 PetriNetUnfolderBase]: 6203/10342 cut-off events. [2024-10-24 12:36:33,388 INFO L125 PetriNetUnfolderBase]: For 333087/333494 co-relation queries the response was YES. [2024-10-24 12:36:33,423 INFO L83 FinitePrefix]: Finished finitePrefix Result has 57094 conditions, 10342 events. 6203/10342 cut-off events. For 333087/333494 co-relation queries the response was YES. Maximal size of possible extension queue 383. Compared 68992 event pairs, 411 based on Foata normal form. 246/10102 useless extension candidates. Maximal degree in co-relation 43496. Up to 2031 conditions per place. [2024-10-24 12:36:33,450 INFO L140 encePairwiseOnDemand]: 23/37 looper letters, 151 selfloop transitions, 118 changer transitions 155/443 dead transitions. [2024-10-24 12:36:33,450 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 169 places, 443 transitions, 4543 flow [2024-10-24 12:36:33,451 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2024-10-24 12:36:33,451 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2024-10-24 12:36:33,452 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 453 transitions. [2024-10-24 12:36:33,452 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.4708939708939709 [2024-10-24 12:36:33,452 INFO L175 Difference]: Start difference. First operand has 150 places, 167 transitions, 1094 flow. Second operand 26 states and 453 transitions. [2024-10-24 12:36:33,452 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 169 places, 443 transitions, 4543 flow [2024-10-24 12:36:34,036 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 162 places, 443 transitions, 4100 flow, removed 219 selfloop flow, removed 7 redundant places. [2024-10-24 12:36:34,040 INFO L231 Difference]: Finished difference. Result has 171 places, 171 transitions, 1555 flow [2024-10-24 12:36:34,040 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=37, PETRI_DIFFERENCE_MINUEND_FLOW=989, PETRI_DIFFERENCE_MINUEND_PLACES=137, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=167, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=71, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=91, PETRI_DIFFERENCE_SUBTRAHEND_STATES=26, PETRI_FLOW=1555, PETRI_PLACES=171, PETRI_TRANSITIONS=171} [2024-10-24 12:36:34,040 INFO L277 CegarLoopForPetriNet]: 39 programPoint places, 132 predicate places. [2024-10-24 12:36:34,041 INFO L471 AbstractCegarLoop]: Abstraction has has 171 places, 171 transitions, 1555 flow [2024-10-24 12:36:34,041 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 34 states have (on average 10.588235294117647) internal successors, (360), 34 states have internal predecessors, (360), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-24 12:36:34,041 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-24 12:36:34,041 INFO L204 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-24 12:36:34,056 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2024-10-24 12:36:34,242 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-24 12:36:34,242 INFO L396 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)] === [2024-10-24 12:36:34,243 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-24 12:36:34,243 INFO L85 PathProgramCache]: Analyzing trace with hash -1583234698, now seen corresponding path program 3 times [2024-10-24 12:36:34,243 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-24 12:36:34,243 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1948708103] [2024-10-24 12:36:34,243 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-24 12:36:34,243 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-24 12:36:34,254 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-24 12:36:34,292 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 6 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-10-24 12:36:34,292 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-24 12:36:34,293 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1948708103] [2024-10-24 12:36:34,293 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1948708103] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-24 12:36:34,293 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [544431163] [2024-10-24 12:36:34,293 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-10-24 12:36:34,293 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-24 12:36:34,293 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-24 12:36:34,295 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) [2024-10-24 12:36:34,296 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2024-10-24 12:36:34,354 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2024-10-24 12:36:34,355 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-10-24 12:36:34,355 INFO L255 TraceCheckSpWp]: Trace formula consists of 204 conjuncts, 4 conjuncts are in the unsatisfiable core [2024-10-24 12:36:34,356 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-24 12:36:34,380 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 6 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-10-24 12:36:34,381 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-24 12:36:34,535 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 4 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-10-24 12:36:34,536 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [544431163] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-24 12:36:34,536 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-24 12:36:34,536 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 4] total 6 [2024-10-24 12:36:34,536 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1015503866] [2024-10-24 12:36:34,536 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-24 12:36:34,536 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-10-24 12:36:34,537 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-24 12:36:34,537 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-10-24 12:36:34,537 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2024-10-24 12:36:34,538 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 37 [2024-10-24 12:36:34,538 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 171 places, 171 transitions, 1555 flow. Second operand has 7 states, 7 states have (on average 19.857142857142858) internal successors, (139), 7 states have internal predecessors, (139), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-24 12:36:34,538 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-24 12:36:34,538 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 37 [2024-10-24 12:36:34,538 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-24 12:36:35,441 INFO L124 PetriNetUnfolderBase]: 2974/6140 cut-off events. [2024-10-24 12:36:35,441 INFO L125 PetriNetUnfolderBase]: For 179065/179895 co-relation queries the response was YES. [2024-10-24 12:36:35,472 INFO L83 FinitePrefix]: Finished finitePrefix Result has 36136 conditions, 6140 events. 2974/6140 cut-off events. For 179065/179895 co-relation queries the response was YES. Maximal size of possible extension queue 210. Compared 45422 event pairs, 625 based on Foata normal form. 289/6120 useless extension candidates. Maximal degree in co-relation 30048. Up to 1652 conditions per place. [2024-10-24 12:36:35,507 INFO L140 encePairwiseOnDemand]: 34/37 looper letters, 148 selfloop transitions, 25 changer transitions 21/271 dead transitions. [2024-10-24 12:36:35,508 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 156 places, 271 transitions, 2943 flow [2024-10-24 12:36:35,508 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-10-24 12:36:35,508 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-10-24 12:36:35,509 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 112 transitions. [2024-10-24 12:36:35,509 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.7567567567567568 [2024-10-24 12:36:35,509 INFO L175 Difference]: Start difference. First operand has 171 places, 171 transitions, 1555 flow. Second operand 4 states and 112 transitions. [2024-10-24 12:36:35,509 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 156 places, 271 transitions, 2943 flow [2024-10-24 12:36:36,176 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 137 places, 271 transitions, 2472 flow, removed 185 selfloop flow, removed 19 redundant places. [2024-10-24 12:36:36,180 INFO L231 Difference]: Finished difference. Result has 139 places, 187 transitions, 1536 flow [2024-10-24 12:36:36,180 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=37, PETRI_DIFFERENCE_MINUEND_FLOW=1264, PETRI_DIFFERENCE_MINUEND_PLACES=134, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=171, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=147, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=1536, PETRI_PLACES=139, PETRI_TRANSITIONS=187} [2024-10-24 12:36:36,181 INFO L277 CegarLoopForPetriNet]: 39 programPoint places, 100 predicate places. [2024-10-24 12:36:36,181 INFO L471 AbstractCegarLoop]: Abstraction has has 139 places, 187 transitions, 1536 flow [2024-10-24 12:36:36,181 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 19.857142857142858) internal successors, (139), 7 states have internal predecessors, (139), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-24 12:36:36,181 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-24 12:36:36,182 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-24 12:36:36,195 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2024-10-24 12:36:36,382 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-24 12:36:36,383 INFO L396 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)] === [2024-10-24 12:36:36,383 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-24 12:36:36,383 INFO L85 PathProgramCache]: Analyzing trace with hash 850715392, now seen corresponding path program 4 times [2024-10-24 12:36:36,384 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-24 12:36:36,384 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [959421038] [2024-10-24 12:36:36,384 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-24 12:36:36,384 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-24 12:36:36,396 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-24 12:36:36,474 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 6 proven. 5 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-10-24 12:36:36,475 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-24 12:36:36,475 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [959421038] [2024-10-24 12:36:36,475 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [959421038] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-24 12:36:36,475 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2072563105] [2024-10-24 12:36:36,475 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-10-24 12:36:36,475 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-24 12:36:36,476 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-24 12:36:36,477 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) [2024-10-24 12:36:36,482 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2024-10-24 12:36:36,545 INFO L227 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-10-24 12:36:36,546 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-10-24 12:36:36,547 INFO L255 TraceCheckSpWp]: Trace formula consists of 214 conjuncts, 8 conjuncts are in the unsatisfiable core [2024-10-24 12:36:36,548 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-24 12:36:36,603 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 10 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-10-24 12:36:36,603 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-24 12:36:36,670 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 6 proven. 5 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-10-24 12:36:36,671 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2072563105] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-24 12:36:36,671 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-24 12:36:36,671 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 11 [2024-10-24 12:36:36,671 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [32474300] [2024-10-24 12:36:36,671 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-24 12:36:36,672 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-10-24 12:36:36,672 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-24 12:36:36,672 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-10-24 12:36:36,672 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=91, Unknown=0, NotChecked=0, Total=132 [2024-10-24 12:36:36,673 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 37 [2024-10-24 12:36:36,673 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 139 places, 187 transitions, 1536 flow. Second operand has 12 states, 12 states have (on average 17.75) internal successors, (213), 12 states have internal predecessors, (213), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-24 12:36:36,673 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-24 12:36:36,673 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 37 [2024-10-24 12:36:36,673 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-24 12:36:37,335 INFO L124 PetriNetUnfolderBase]: 2446/5132 cut-off events. [2024-10-24 12:36:37,336 INFO L125 PetriNetUnfolderBase]: For 95261/95957 co-relation queries the response was YES. [2024-10-24 12:36:37,361 INFO L83 FinitePrefix]: Finished finitePrefix Result has 26650 conditions, 5132 events. 2446/5132 cut-off events. For 95261/95957 co-relation queries the response was YES. Maximal size of possible extension queue 187. Compared 36451 event pairs, 1311 based on Foata normal form. 144/5005 useless extension candidates. Maximal degree in co-relation 22302. Up to 3192 conditions per place. [2024-10-24 12:36:37,385 INFO L140 encePairwiseOnDemand]: 33/37 looper letters, 86 selfloop transitions, 3 changer transitions 38/188 dead transitions. [2024-10-24 12:36:37,386 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 143 places, 188 transitions, 1706 flow [2024-10-24 12:36:37,386 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-10-24 12:36:37,386 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-10-24 12:36:37,387 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 130 transitions. [2024-10-24 12:36:37,387 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5855855855855856 [2024-10-24 12:36:37,388 INFO L175 Difference]: Start difference. First operand has 139 places, 187 transitions, 1536 flow. Second operand 6 states and 130 transitions. [2024-10-24 12:36:37,388 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 143 places, 188 transitions, 1706 flow [2024-10-24 12:36:37,622 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 143 places, 188 transitions, 1674 flow, removed 16 selfloop flow, removed 0 redundant places. [2024-10-24 12:36:37,624 INFO L231 Difference]: Finished difference. Result has 144 places, 150 transitions, 1201 flow [2024-10-24 12:36:37,624 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=37, PETRI_DIFFERENCE_MINUEND_FLOW=1355, PETRI_DIFFERENCE_MINUEND_PLACES=138, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=170, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=167, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=1201, PETRI_PLACES=144, PETRI_TRANSITIONS=150} [2024-10-24 12:36:37,625 INFO L277 CegarLoopForPetriNet]: 39 programPoint places, 105 predicate places. [2024-10-24 12:36:37,625 INFO L471 AbstractCegarLoop]: Abstraction has has 144 places, 150 transitions, 1201 flow [2024-10-24 12:36:37,625 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 17.75) internal successors, (213), 12 states have internal predecessors, (213), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-24 12:36:37,626 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-24 12:36:37,626 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-24 12:36:37,638 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2024-10-24 12:36:37,826 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-24 12:36:37,827 INFO L396 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)] === [2024-10-24 12:36:37,828 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-24 12:36:37,828 INFO L85 PathProgramCache]: Analyzing trace with hash -419238970, now seen corresponding path program 5 times [2024-10-24 12:36:37,828 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-24 12:36:37,828 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1700218934] [2024-10-24 12:36:37,828 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-24 12:36:37,828 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-24 12:36:37,858 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-24 12:36:38,869 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-24 12:36:38,869 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-24 12:36:38,869 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1700218934] [2024-10-24 12:36:38,870 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1700218934] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-24 12:36:38,870 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [134600435] [2024-10-24 12:36:38,870 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-10-24 12:36:38,873 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-24 12:36:38,873 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-24 12:36:38,875 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) [2024-10-24 12:36:38,886 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2024-10-24 12:36:38,953 INFO L227 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2024-10-24 12:36:38,954 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-10-24 12:36:38,955 INFO L255 TraceCheckSpWp]: Trace formula consists of 223 conjuncts, 35 conjuncts are in the unsatisfiable core [2024-10-24 12:36:38,957 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-24 12:36:39,914 INFO L349 Elim1Store]: treesize reduction 38, result has 15.6 percent of original size [2024-10-24 12:36:39,915 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 46 treesize of output 19 [2024-10-24 12:36:40,006 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 1 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-24 12:36:40,006 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-24 12:36:40,681 INFO L349 Elim1Store]: treesize reduction 8, result has 82.2 percent of original size [2024-10-24 12:36:40,682 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 50 treesize of output 53 [2024-10-24 12:36:41,277 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 2 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-24 12:36:41,277 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [134600435] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-24 12:36:41,277 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-24 12:36:41,277 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 19, 19] total 50 [2024-10-24 12:36:41,278 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [919789415] [2024-10-24 12:36:41,278 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-24 12:36:41,278 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 51 states [2024-10-24 12:36:41,279 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-24 12:36:41,280 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 51 interpolants. [2024-10-24 12:36:41,281 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=318, Invalid=2232, Unknown=0, NotChecked=0, Total=2550 [2024-10-24 12:36:41,674 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 37 [2024-10-24 12:36:41,675 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 144 places, 150 transitions, 1201 flow. Second operand has 51 states, 51 states have (on average 10.058823529411764) internal successors, (513), 51 states have internal predecessors, (513), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-24 12:36:41,675 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-24 12:36:41,676 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 37 [2024-10-24 12:36:41,676 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-24 12:36:55,535 INFO L124 PetriNetUnfolderBase]: 10334/17538 cut-off events. [2024-10-24 12:36:55,535 INFO L125 PetriNetUnfolderBase]: For 228658/229161 co-relation queries the response was YES. [2024-10-24 12:36:55,590 INFO L83 FinitePrefix]: Finished finitePrefix Result has 83870 conditions, 17538 events. 10334/17538 cut-off events. For 228658/229161 co-relation queries the response was YES. Maximal size of possible extension queue 385. Compared 119599 event pairs, 1434 based on Foata normal form. 473/17712 useless extension candidates. Maximal degree in co-relation 83810. Up to 4164 conditions per place. [2024-10-24 12:36:55,641 INFO L140 encePairwiseOnDemand]: 22/37 looper letters, 687 selfloop transitions, 445 changer transitions 206/1353 dead transitions. [2024-10-24 12:36:55,642 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 259 places, 1353 transitions, 12344 flow [2024-10-24 12:36:55,642 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 129 states. [2024-10-24 12:36:55,642 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 129 states. [2024-10-24 12:36:55,647 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 129 states to 129 states and 2071 transitions. [2024-10-24 12:36:55,649 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.43389901529436414 [2024-10-24 12:36:55,650 INFO L175 Difference]: Start difference. First operand has 144 places, 150 transitions, 1201 flow. Second operand 129 states and 2071 transitions. [2024-10-24 12:36:55,650 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 259 places, 1353 transitions, 12344 flow [2024-10-24 12:36:56,644 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 247 places, 1353 transitions, 11552 flow, removed 393 selfloop flow, removed 12 redundant places. [2024-10-24 12:36:56,655 INFO L231 Difference]: Finished difference. Result has 280 places, 566 transitions, 6659 flow [2024-10-24 12:36:56,655 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=37, PETRI_DIFFERENCE_MINUEND_FLOW=1157, PETRI_DIFFERENCE_MINUEND_PLACES=119, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=150, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=90, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=49, PETRI_DIFFERENCE_SUBTRAHEND_STATES=129, PETRI_FLOW=6659, PETRI_PLACES=280, PETRI_TRANSITIONS=566} [2024-10-24 12:36:56,656 INFO L277 CegarLoopForPetriNet]: 39 programPoint places, 241 predicate places. [2024-10-24 12:36:56,656 INFO L471 AbstractCegarLoop]: Abstraction has has 280 places, 566 transitions, 6659 flow [2024-10-24 12:36:56,656 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 51 states, 51 states have (on average 10.058823529411764) internal successors, (513), 51 states have internal predecessors, (513), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-24 12:36:56,656 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-24 12:36:56,656 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-24 12:36:56,669 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2024-10-24 12:36:56,857 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-24 12:36:56,857 INFO L396 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)] === [2024-10-24 12:36:56,858 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-24 12:36:56,858 INFO L85 PathProgramCache]: Analyzing trace with hash 308063968, now seen corresponding path program 6 times [2024-10-24 12:36:56,858 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-24 12:36:56,858 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [916111121] [2024-10-24 12:36:56,858 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-24 12:36:56,859 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-24 12:36:56,899 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-24 12:36:58,095 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-24 12:36:58,096 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-24 12:36:58,096 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [916111121] [2024-10-24 12:36:58,096 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [916111121] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-24 12:36:58,096 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [320818177] [2024-10-24 12:36:58,097 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2024-10-24 12:36:58,097 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-24 12:36:58,097 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-24 12:36:58,101 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) [2024-10-24 12:36:58,102 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2024-10-24 12:36:58,171 INFO L227 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2024-10-24 12:36:58,171 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-10-24 12:36:58,173 INFO L255 TraceCheckSpWp]: Trace formula consists of 223 conjuncts, 35 conjuncts are in the unsatisfiable core [2024-10-24 12:36:58,175 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-24 12:36:58,829 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 1 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-24 12:36:58,830 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-24 12:36:59,284 INFO L349 Elim1Store]: treesize reduction 10, result has 73.0 percent of original size [2024-10-24 12:36:59,284 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 51 treesize of output 43 [2024-10-24 12:36:59,623 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 1 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-24 12:36:59,624 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [320818177] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-24 12:36:59,624 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-24 12:36:59,624 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15, 15] total 42 [2024-10-24 12:36:59,624 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2100787541] [2024-10-24 12:36:59,624 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-24 12:36:59,625 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 43 states [2024-10-24 12:36:59,625 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-24 12:36:59,625 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2024-10-24 12:36:59,626 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=215, Invalid=1591, Unknown=0, NotChecked=0, Total=1806 [2024-10-24 12:36:59,772 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 37 [2024-10-24 12:36:59,773 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 280 places, 566 transitions, 6659 flow. Second operand has 43 states, 43 states have (on average 13.162790697674419) internal successors, (566), 43 states have internal predecessors, (566), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-24 12:36:59,774 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-24 12:36:59,774 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 37 [2024-10-24 12:36:59,774 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-24 12:37:16,610 INFO L124 PetriNetUnfolderBase]: 21908/39097 cut-off events. [2024-10-24 12:37:16,610 INFO L125 PetriNetUnfolderBase]: For 553242/554226 co-relation queries the response was YES. [2024-10-24 12:37:16,980 INFO L83 FinitePrefix]: Finished finitePrefix Result has 230805 conditions, 39097 events. 21908/39097 cut-off events. For 553242/554226 co-relation queries the response was YES. Maximal size of possible extension queue 1115. Compared 329242 event pairs, 1147 based on Foata normal form. 761/39079 useless extension candidates. Maximal degree in co-relation 228001. Up to 6674 conditions per place. [2024-10-24 12:37:17,266 INFO L140 encePairwiseOnDemand]: 22/37 looper letters, 1017 selfloop transitions, 1052 changer transitions 496/2610 dead transitions. [2024-10-24 12:37:17,266 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 415 places, 2610 transitions, 34448 flow [2024-10-24 12:37:17,270 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 137 states. [2024-10-24 12:37:17,271 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 137 states. [2024-10-24 12:37:17,285 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 137 states to 137 states and 2583 transitions. [2024-10-24 12:37:17,287 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5095679621227066 [2024-10-24 12:37:17,287 INFO L175 Difference]: Start difference. First operand has 280 places, 566 transitions, 6659 flow. Second operand 137 states and 2583 transitions. [2024-10-24 12:37:17,287 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 415 places, 2610 transitions, 34448 flow