./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/weaver/popl20-three-array-max.wvr.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 6497de01 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e14e5ed8-d474-4c9a-b98a-e2861b4e079a/bin/uautomizer-verify-LYvppIcaGC/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e14e5ed8-d474-4c9a-b98a-e2861b4e079a/bin/uautomizer-verify-LYvppIcaGC/plugins/org.eclipse.equinox.launcher_1.6.800.v20240513-1750.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e14e5ed8-d474-4c9a-b98a-e2861b4e079a/bin/uautomizer-verify-LYvppIcaGC/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e14e5ed8-d474-4c9a-b98a-e2861b4e079a/bin/uautomizer-verify-LYvppIcaGC/config/AutomizerReach.xml -i ../../sv-benchmarks/c/weaver/popl20-three-array-max.wvr.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e14e5ed8-d474-4c9a-b98a-e2861b4e079a/bin/uautomizer-verify-LYvppIcaGC/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e14e5ed8-d474-4c9a-b98a-e2861b4e079a/bin/uautomizer-verify-LYvppIcaGC --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 670814d0a16da58b0f26835e20c05a244e2f373856f13b9d4ff2a931783edf81 --- Real Ultimate output --- This is Ultimate 0.3.0-dev-6497de0 [2024-11-23 23:37:33,654 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-11-23 23:37:33,755 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e14e5ed8-d474-4c9a-b98a-e2861b4e079a/bin/uautomizer-verify-LYvppIcaGC/config/svcomp-Reach-32bit-Automizer_Default.epf [2024-11-23 23:37:33,765 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-11-23 23:37:33,766 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-11-23 23:37:33,808 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-11-23 23:37:33,809 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-11-23 23:37:33,809 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-11-23 23:37:33,810 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-11-23 23:37:33,810 INFO L153 SettingsManager]: * Use memory slicer=true [2024-11-23 23:37:33,811 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-11-23 23:37:33,811 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-11-23 23:37:33,812 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-11-23 23:37:33,812 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-11-23 23:37:33,812 INFO L153 SettingsManager]: * Use SBE=true [2024-11-23 23:37:33,812 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-11-23 23:37:33,812 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-11-23 23:37:33,812 INFO L153 SettingsManager]: * sizeof long=4 [2024-11-23 23:37:33,813 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-11-23 23:37:33,813 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-11-23 23:37:33,813 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-11-23 23:37:33,813 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-11-23 23:37:33,813 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-11-23 23:37:33,813 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-11-23 23:37:33,813 INFO L153 SettingsManager]: * sizeof long double=12 [2024-11-23 23:37:33,813 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-11-23 23:37:33,814 INFO L153 SettingsManager]: * Behaviour of calls to undefined functions=OVERAPPROXIMATE_BEHAVIOUR [2024-11-23 23:37:33,814 INFO L153 SettingsManager]: * Use constant arrays=true [2024-11-23 23:37:33,814 INFO L151 SettingsManager]: Preferences of IcfgBuilder differ from their defaults: [2024-11-23 23:37:33,815 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-11-23 23:37:33,815 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-11-23 23:37:33,815 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-11-23 23:37:33,815 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-11-23 23:37:33,816 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-11-23 23:37:33,816 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-11-23 23:37:33,816 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-11-23 23:37:33,816 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-11-23 23:37:33,816 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-11-23 23:37:33,816 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-11-23 23:37:33,816 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-11-23 23:37:33,817 INFO L153 SettingsManager]: * Compute procedure contracts=false [2024-11-23 23:37:33,817 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-11-23 23:37:33,817 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-11-23 23:37:33,817 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-11-23 23:37:33,817 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-11-23 23:37:33,818 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-11-23 23:37:33,818 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-11-23 23:37:33,818 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-11-23 23:37:33,818 INFO L153 SettingsManager]: * Looper check in Petri net analysis=SEMANTIC 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 -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e14e5ed8-d474-4c9a-b98a-e2861b4e079a/bin/uautomizer-verify-LYvppIcaGC 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 -> 670814d0a16da58b0f26835e20c05a244e2f373856f13b9d4ff2a931783edf81 [2024-11-23 23:37:34,190 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-11-23 23:37:34,205 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-11-23 23:37:34,210 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-11-23 23:37:34,211 INFO L270 PluginConnector]: Initializing CDTParser... [2024-11-23 23:37:34,212 INFO L274 PluginConnector]: CDTParser initialized [2024-11-23 23:37:34,213 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e14e5ed8-d474-4c9a-b98a-e2861b4e079a/bin/uautomizer-verify-LYvppIcaGC/../../sv-benchmarks/c/weaver/popl20-three-array-max.wvr.c [2024-11-23 23:37:37,261 INFO L533 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e14e5ed8-d474-4c9a-b98a-e2861b4e079a/bin/uautomizer-verify-LYvppIcaGC/data/1b5f182dd/b67de3a909d042b59abf3f63d5bc659e/FLAG2e41f1747 [2024-11-23 23:37:37,578 INFO L384 CDTParser]: Found 1 translation units. [2024-11-23 23:37:37,578 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e14e5ed8-d474-4c9a-b98a-e2861b4e079a/sv-benchmarks/c/weaver/popl20-three-array-max.wvr.c [2024-11-23 23:37:37,587 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e14e5ed8-d474-4c9a-b98a-e2861b4e079a/bin/uautomizer-verify-LYvppIcaGC/data/1b5f182dd/b67de3a909d042b59abf3f63d5bc659e/FLAG2e41f1747 [2024-11-23 23:37:37,602 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e14e5ed8-d474-4c9a-b98a-e2861b4e079a/bin/uautomizer-verify-LYvppIcaGC/data/1b5f182dd/b67de3a909d042b59abf3f63d5bc659e [2024-11-23 23:37:37,605 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-11-23 23:37:37,609 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2024-11-23 23:37:37,611 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-11-23 23:37:37,611 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-11-23 23:37:37,620 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-11-23 23:37:37,621 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 11:37:37" (1/1) ... [2024-11-23 23:37:37,621 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3fc816bf and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 11:37:37, skipping insertion in model container [2024-11-23 23:37:37,622 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 11:37:37" (1/1) ... [2024-11-23 23:37:37,647 INFO L175 MainTranslator]: Built tables and reachable declarations [2024-11-23 23:37:37,876 WARN L250 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e14e5ed8-d474-4c9a-b98a-e2861b4e079a/sv-benchmarks/c/weaver/popl20-three-array-max.wvr.c[2862,2875] [2024-11-23 23:37:37,896 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-23 23:37:37,907 INFO L200 MainTranslator]: Completed pre-run [2024-11-23 23:37:37,930 WARN L250 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e14e5ed8-d474-4c9a-b98a-e2861b4e079a/sv-benchmarks/c/weaver/popl20-three-array-max.wvr.c[2862,2875] [2024-11-23 23:37:37,935 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-23 23:37:37,951 INFO L204 MainTranslator]: Completed translation [2024-11-23 23:37:37,952 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 11:37:37 WrapperNode [2024-11-23 23:37:37,952 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-11-23 23:37:37,954 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-11-23 23:37:37,954 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-11-23 23:37:37,954 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-11-23 23:37:37,965 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 11:37:37" (1/1) ... [2024-11-23 23:37:37,974 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 11:37:37" (1/1) ... [2024-11-23 23:37:38,013 INFO L138 Inliner]: procedures = 25, calls = 42, calls flagged for inlining = 14, calls inlined = 22, statements flattened = 218 [2024-11-23 23:37:38,014 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-11-23 23:37:38,014 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-11-23 23:37:38,014 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-11-23 23:37:38,014 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-11-23 23:37:38,024 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 11:37:37" (1/1) ... [2024-11-23 23:37:38,024 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 11:37:37" (1/1) ... [2024-11-23 23:37:38,028 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 11:37:37" (1/1) ... [2024-11-23 23:37:38,056 INFO L175 MemorySlicer]: Split 18 memory accesses to 2 slices as follows [2, 16]. 89 percent of accesses are in the largest equivalence class. The 2 initializations are split as follows [2, 0]. The 4 writes are split as follows [0, 4]. [2024-11-23 23:37:38,060 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 11:37:37" (1/1) ... [2024-11-23 23:37:38,060 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 11:37:37" (1/1) ... [2024-11-23 23:37:38,082 INFO L184 PluginConnector]: Executing the observer ReplaceArrayAssignments from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 11:37:37" (1/1) ... [2024-11-23 23:37:38,083 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 11:37:37" (1/1) ... [2024-11-23 23:37:38,091 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 11:37:37" (1/1) ... [2024-11-23 23:37:38,096 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 11:37:37" (1/1) ... [2024-11-23 23:37:38,099 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 11:37:37" (1/1) ... [2024-11-23 23:37:38,106 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-11-23 23:37:38,107 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-11-23 23:37:38,110 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-11-23 23:37:38,110 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-11-23 23:37:38,111 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 11:37:37" (1/1) ... [2024-11-23 23:37:38,120 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-11-23 23:37:38,132 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e14e5ed8-d474-4c9a-b98a-e2861b4e079a/bin/uautomizer-verify-LYvppIcaGC/z3 [2024-11-23 23:37:38,147 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e14e5ed8-d474-4c9a-b98a-e2861b4e079a/bin/uautomizer-verify-LYvppIcaGC/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (exit command is (exit), workingDir is null) [2024-11-23 23:37:38,150 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e14e5ed8-d474-4c9a-b98a-e2861b4e079a/bin/uautomizer-verify-LYvppIcaGC/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Waiting until timeout for monitored process [2024-11-23 23:37:38,179 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-11-23 23:37:38,180 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2024-11-23 23:37:38,180 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2024-11-23 23:37:38,180 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2024-11-23 23:37:38,180 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2024-11-23 23:37:38,180 INFO L130 BoogieDeclarations]: Found specification of procedure thread3 [2024-11-23 23:37:38,180 INFO L138 BoogieDeclarations]: Found implementation of procedure thread3 [2024-11-23 23:37:38,180 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-11-23 23:37:38,180 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#1 [2024-11-23 23:37:38,180 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#0 [2024-11-23 23:37:38,180 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#1 [2024-11-23 23:37:38,180 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2024-11-23 23:37:38,181 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2024-11-23 23:37:38,181 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2024-11-23 23:37:38,181 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-11-23 23:37:38,181 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-11-23 23:37:38,181 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#0 [2024-11-23 23:37:38,181 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#1 [2024-11-23 23:37:38,182 WARN L203 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement. [2024-11-23 23:37:38,318 INFO L234 CfgBuilder]: Building ICFG [2024-11-23 23:37:38,320 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2024-11-23 23:37:38,962 INFO L279 CfgBuilder]: Omitted future-live optimization because the input is a concurrent program. [2024-11-23 23:37:38,962 INFO L283 CfgBuilder]: Performing block encoding [2024-11-23 23:37:39,560 INFO L307 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-11-23 23:37:39,561 INFO L312 CfgBuilder]: Removed 6 assume(true) statements. [2024-11-23 23:37:39,561 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 11:37:39 BoogieIcfgContainer [2024-11-23 23:37:39,561 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-11-23 23:37:39,565 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-11-23 23:37:39,565 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-11-23 23:37:39,570 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-11-23 23:37:39,570 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 23.11 11:37:37" (1/3) ... [2024-11-23 23:37:39,571 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6d0b8e4b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 11:37:39, skipping insertion in model container [2024-11-23 23:37:39,572 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 11:37:37" (2/3) ... [2024-11-23 23:37:39,573 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6d0b8e4b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 11:37:39, skipping insertion in model container [2024-11-23 23:37:39,573 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 11:37:39" (3/3) ... [2024-11-23 23:37:39,575 INFO L128 eAbstractionObserver]: Analyzing ICFG popl20-three-array-max.wvr.c [2024-11-23 23:37:39,590 INFO L216 ceAbstractionStarter]: Automizer settings: Hoare:LoopHeads NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-11-23 23:37:39,592 INFO L151 ceAbstractionStarter]: Applying trace abstraction to ICFG popl20-three-array-max.wvr.c that has 4 procedures, 33 locations, 1 initial locations, 6 loop locations, and 1 error locations. [2024-11-23 23:37:39,592 INFO L491 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2024-11-23 23:37:39,715 INFO L143 ThreadInstanceAdder]: Constructed 3 joinOtherThreadTransitions. [2024-11-23 23:37:39,761 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 42 places, 39 transitions, 99 flow [2024-11-23 23:37:39,821 INFO L124 PetriNetUnfolderBase]: 7/36 cut-off events. [2024-11-23 23:37:39,826 INFO L125 PetriNetUnfolderBase]: For 3/3 co-relation queries the response was YES. [2024-11-23 23:37:39,831 INFO L83 FinitePrefix]: Finished finitePrefix Result has 49 conditions, 36 events. 7/36 cut-off events. For 3/3 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 40 event pairs, 0 based on Foata normal form. 0/28 useless extension candidates. Maximal degree in co-relation 26. Up to 2 conditions per place. [2024-11-23 23:37:39,831 INFO L82 GeneralOperation]: Start removeDead. Operand has 42 places, 39 transitions, 99 flow [2024-11-23 23:37:39,835 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 38 places, 35 transitions, 88 flow [2024-11-23 23:37:39,851 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-11-23 23:37:39,873 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;@2ff937b9, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-11-23 23:37:39,873 INFO L334 AbstractCegarLoop]: Starting to check reachability of 4 error locations. [2024-11-23 23:37:39,908 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2024-11-23 23:37:39,908 INFO L124 PetriNetUnfolderBase]: 7/34 cut-off events. [2024-11-23 23:37:39,908 INFO L125 PetriNetUnfolderBase]: For 3/3 co-relation queries the response was YES. [2024-11-23 23:37:39,909 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-23 23:37:39,910 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-23 23:37:39,911 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)] === [2024-11-23 23:37:39,917 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-23 23:37:39,918 INFO L85 PathProgramCache]: Analyzing trace with hash 975537836, now seen corresponding path program 1 times [2024-11-23 23:37:39,927 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-23 23:37:39,928 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1822299303] [2024-11-23 23:37:39,928 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-23 23:37:39,929 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-23 23:37:40,144 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-23 23:37:40,571 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-23 23:37:40,571 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-23 23:37:40,572 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1822299303] [2024-11-23 23:37:40,574 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1822299303] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-23 23:37:40,574 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-23 23:37:40,575 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-11-23 23:37:40,577 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [551833968] [2024-11-23 23:37:40,578 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-23 23:37:40,587 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-23 23:37:40,593 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-23 23:37:40,624 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-23 23:37:40,625 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-23 23:37:40,628 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 39 [2024-11-23 23:37:40,632 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 38 places, 35 transitions, 88 flow. Second operand has 3 states, 3 states have (on average 16.666666666666668) internal successors, (50), 3 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-23 23:37:40,632 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-23 23:37:40,633 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 39 [2024-11-23 23:37:40,634 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-23 23:37:41,021 INFO L124 PetriNetUnfolderBase]: 362/620 cut-off events. [2024-11-23 23:37:41,021 INFO L125 PetriNetUnfolderBase]: For 53/53 co-relation queries the response was YES. [2024-11-23 23:37:41,028 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1171 conditions, 620 events. 362/620 cut-off events. For 53/53 co-relation queries the response was YES. Maximal size of possible extension queue 44. Compared 2537 event pairs, 230 based on Foata normal form. 0/543 useless extension candidates. Maximal degree in co-relation 993. Up to 492 conditions per place. [2024-11-23 23:37:41,038 INFO L140 encePairwiseOnDemand]: 36/39 looper letters, 27 selfloop transitions, 2 changer transitions 0/36 dead transitions. [2024-11-23 23:37:41,039 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 40 places, 36 transitions, 148 flow [2024-11-23 23:37:41,040 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-23 23:37:41,043 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-11-23 23:37:41,055 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 60 transitions. [2024-11-23 23:37:41,058 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.5128205128205128 [2024-11-23 23:37:41,060 INFO L175 Difference]: Start difference. First operand has 38 places, 35 transitions, 88 flow. Second operand 3 states and 60 transitions. [2024-11-23 23:37:41,061 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 40 places, 36 transitions, 148 flow [2024-11-23 23:37:41,067 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 34 places, 36 transitions, 136 flow, removed 0 selfloop flow, removed 6 redundant places. [2024-11-23 23:37:41,070 INFO L231 Difference]: Finished difference. Result has 35 places, 36 transitions, 88 flow [2024-11-23 23:37:41,074 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=39, PETRI_DIFFERENCE_MINUEND_FLOW=76, PETRI_DIFFERENCE_MINUEND_PLACES=32, 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=88, PETRI_PLACES=35, PETRI_TRANSITIONS=36} [2024-11-23 23:37:41,079 INFO L279 CegarLoopForPetriNet]: 38 programPoint places, -3 predicate places. [2024-11-23 23:37:41,079 INFO L471 AbstractCegarLoop]: Abstraction has has 35 places, 36 transitions, 88 flow [2024-11-23 23:37:41,080 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 16.666666666666668) internal successors, (50), 3 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-23 23:37:41,080 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-23 23:37:41,080 INFO L206 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] [2024-11-23 23:37:41,080 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-11-23 23:37:41,080 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)] === [2024-11-23 23:37:41,083 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-23 23:37:41,083 INFO L85 PathProgramCache]: Analyzing trace with hash -891570204, now seen corresponding path program 1 times [2024-11-23 23:37:41,083 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-23 23:37:41,084 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [789472123] [2024-11-23 23:37:41,084 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-23 23:37:41,084 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-23 23:37:41,164 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-23 23:37:41,382 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-23 23:37:41,382 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-23 23:37:41,382 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [789472123] [2024-11-23 23:37:41,382 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [789472123] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-23 23:37:41,382 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-23 23:37:41,382 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-11-23 23:37:41,383 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1543933225] [2024-11-23 23:37:41,383 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-23 23:37:41,384 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-23 23:37:41,384 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-23 23:37:41,385 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-23 23:37:41,385 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-11-23 23:37:41,399 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 39 [2024-11-23 23:37:41,399 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 35 places, 36 transitions, 88 flow. Second operand has 4 states, 4 states have (on average 15.25) internal successors, (61), 4 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) [2024-11-23 23:37:41,399 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-23 23:37:41,399 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 39 [2024-11-23 23:37:41,399 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-23 23:37:41,685 INFO L124 PetriNetUnfolderBase]: 362/622 cut-off events. [2024-11-23 23:37:41,686 INFO L125 PetriNetUnfolderBase]: For 13/13 co-relation queries the response was YES. [2024-11-23 23:37:41,692 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1141 conditions, 622 events. 362/622 cut-off events. For 13/13 co-relation queries the response was YES. Maximal size of possible extension queue 44. Compared 2535 event pairs, 230 based on Foata normal form. 0/545 useless extension candidates. Maximal degree in co-relation 1130. Up to 491 conditions per place. [2024-11-23 23:37:41,697 INFO L140 encePairwiseOnDemand]: 32/39 looper letters, 25 selfloop transitions, 6 changer transitions 0/38 dead transitions. [2024-11-23 23:37:41,697 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 38 places, 38 transitions, 154 flow [2024-11-23 23:37:41,699 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-11-23 23:37:41,699 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-11-23 23:37:41,700 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 73 transitions. [2024-11-23 23:37:41,700 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.46794871794871795 [2024-11-23 23:37:41,700 INFO L175 Difference]: Start difference. First operand has 35 places, 36 transitions, 88 flow. Second operand 4 states and 73 transitions. [2024-11-23 23:37:41,701 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 38 places, 38 transitions, 154 flow [2024-11-23 23:37:41,704 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 37 places, 38 transitions, 150 flow, removed 1 selfloop flow, removed 1 redundant places. [2024-11-23 23:37:41,706 INFO L231 Difference]: Finished difference. Result has 38 places, 38 transitions, 112 flow [2024-11-23 23:37:41,706 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=39, PETRI_DIFFERENCE_MINUEND_FLOW=84, PETRI_DIFFERENCE_MINUEND_PLACES=34, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=36, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=30, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=112, PETRI_PLACES=38, PETRI_TRANSITIONS=38} [2024-11-23 23:37:41,707 INFO L279 CegarLoopForPetriNet]: 38 programPoint places, 0 predicate places. [2024-11-23 23:37:41,707 INFO L471 AbstractCegarLoop]: Abstraction has has 38 places, 38 transitions, 112 flow [2024-11-23 23:37:41,708 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 15.25) internal successors, (61), 4 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) [2024-11-23 23:37:41,709 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-23 23:37:41,710 INFO L206 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] [2024-11-23 23:37:41,710 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-11-23 23:37:41,710 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)] === [2024-11-23 23:37:41,712 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-23 23:37:41,712 INFO L85 PathProgramCache]: Analyzing trace with hash 1405796623, now seen corresponding path program 1 times [2024-11-23 23:37:41,712 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-23 23:37:41,712 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1451332643] [2024-11-23 23:37:41,713 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-23 23:37:41,713 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-23 23:37:41,786 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-23 23:37:42,127 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-11-23 23:37:42,127 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-23 23:37:42,127 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1451332643] [2024-11-23 23:37:42,128 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1451332643] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-23 23:37:42,128 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-23 23:37:42,128 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-11-23 23:37:42,128 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1714798140] [2024-11-23 23:37:42,128 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-23 23:37:42,129 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-23 23:37:42,129 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-23 23:37:42,129 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-23 23:37:42,129 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-23 23:37:42,131 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 39 [2024-11-23 23:37:42,132 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 38 places, 38 transitions, 112 flow. Second operand has 3 states, 3 states have (on average 17.666666666666668) internal successors, (53), 3 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-23 23:37:42,132 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-23 23:37:42,132 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 39 [2024-11-23 23:37:42,132 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-23 23:37:42,434 INFO L124 PetriNetUnfolderBase]: 525/955 cut-off events. [2024-11-23 23:37:42,435 INFO L125 PetriNetUnfolderBase]: For 23/23 co-relation queries the response was YES. [2024-11-23 23:37:42,438 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1677 conditions, 955 events. 525/955 cut-off events. For 23/23 co-relation queries the response was YES. Maximal size of possible extension queue 44. Compared 4323 event pairs, 172 based on Foata normal form. 1/836 useless extension candidates. Maximal degree in co-relation 1657. Up to 361 conditions per place. [2024-11-23 23:37:42,445 INFO L140 encePairwiseOnDemand]: 36/39 looper letters, 40 selfloop transitions, 2 changer transitions 2/51 dead transitions. [2024-11-23 23:37:42,445 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 40 places, 51 transitions, 229 flow [2024-11-23 23:37:42,447 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-23 23:37:42,447 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-11-23 23:37:42,448 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 72 transitions. [2024-11-23 23:37:42,448 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.6153846153846154 [2024-11-23 23:37:42,449 INFO L175 Difference]: Start difference. First operand has 38 places, 38 transitions, 112 flow. Second operand 3 states and 72 transitions. [2024-11-23 23:37:42,449 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 40 places, 51 transitions, 229 flow [2024-11-23 23:37:42,452 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 39 places, 51 transitions, 228 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-11-23 23:37:42,453 INFO L231 Difference]: Finished difference. Result has 40 places, 39 transitions, 123 flow [2024-11-23 23:37:42,453 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=39, PETRI_DIFFERENCE_MINUEND_FLOW=111, PETRI_DIFFERENCE_MINUEND_PLACES=37, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=38, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=36, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=123, PETRI_PLACES=40, PETRI_TRANSITIONS=39} [2024-11-23 23:37:42,454 INFO L279 CegarLoopForPetriNet]: 38 programPoint places, 2 predicate places. [2024-11-23 23:37:42,454 INFO L471 AbstractCegarLoop]: Abstraction has has 40 places, 39 transitions, 123 flow [2024-11-23 23:37:42,456 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 17.666666666666668) internal successors, (53), 3 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-23 23:37:42,456 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-23 23:37:42,456 INFO L206 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] [2024-11-23 23:37:42,456 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2024-11-23 23:37:42,456 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)] === [2024-11-23 23:37:42,457 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-23 23:37:42,457 INFO L85 PathProgramCache]: Analyzing trace with hash 1322813042, now seen corresponding path program 1 times [2024-11-23 23:37:42,457 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-23 23:37:42,457 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [336029441] [2024-11-23 23:37:42,458 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-23 23:37:42,458 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-23 23:37:42,509 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-23 23:37:42,828 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-23 23:37:42,828 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-23 23:37:42,828 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [336029441] [2024-11-23 23:37:42,829 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [336029441] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-23 23:37:42,829 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [26563841] [2024-11-23 23:37:42,829 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-23 23:37:42,829 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-23 23:37:42,829 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e14e5ed8-d474-4c9a-b98a-e2861b4e079a/bin/uautomizer-verify-LYvppIcaGC/z3 [2024-11-23 23:37:42,834 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e14e5ed8-d474-4c9a-b98a-e2861b4e079a/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-23 23:37:42,837 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e14e5ed8-d474-4c9a-b98a-e2861b4e079a/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2024-11-23 23:37:43,007 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-23 23:37:43,011 INFO L256 TraceCheckSpWp]: Trace formula consists of 276 conjuncts, 7 conjuncts are in the unsatisfiable core [2024-11-23 23:37:43,020 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-23 23:37:43,142 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-23 23:37:43,142 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-23 23:37:43,266 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-23 23:37:43,266 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [26563841] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-23 23:37:43,267 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-23 23:37:43,267 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 11 [2024-11-23 23:37:43,267 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [230700659] [2024-11-23 23:37:43,267 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-23 23:37:43,268 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-11-23 23:37:43,268 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-23 23:37:43,269 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-11-23 23:37:43,269 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=88, Unknown=0, NotChecked=0, Total=132 [2024-11-23 23:37:43,334 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 39 [2024-11-23 23:37:43,335 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 40 places, 39 transitions, 123 flow. Second operand has 12 states, 12 states have (on average 12.0) internal successors, (144), 12 states have internal predecessors, (144), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-23 23:37:43,335 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-23 23:37:43,335 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 39 [2024-11-23 23:37:43,335 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-23 23:37:43,945 INFO L124 PetriNetUnfolderBase]: 899/1460 cut-off events. [2024-11-23 23:37:43,945 INFO L125 PetriNetUnfolderBase]: For 101/101 co-relation queries the response was YES. [2024-11-23 23:37:43,952 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2862 conditions, 1460 events. 899/1460 cut-off events. For 101/101 co-relation queries the response was YES. Maximal size of possible extension queue 48. Compared 6037 event pairs, 398 based on Foata normal form. 0/1231 useless extension candidates. Maximal degree in co-relation 2092. Up to 681 conditions per place. [2024-11-23 23:37:43,959 INFO L140 encePairwiseOnDemand]: 29/39 looper letters, 36 selfloop transitions, 10 changer transitions 37/89 dead transitions. [2024-11-23 23:37:43,959 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 48 places, 89 transitions, 430 flow [2024-11-23 23:37:43,960 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-11-23 23:37:43,960 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-11-23 23:37:43,964 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 164 transitions. [2024-11-23 23:37:43,964 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.4672364672364672 [2024-11-23 23:37:43,965 INFO L175 Difference]: Start difference. First operand has 40 places, 39 transitions, 123 flow. Second operand 9 states and 164 transitions. [2024-11-23 23:37:43,965 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 48 places, 89 transitions, 430 flow [2024-11-23 23:37:43,970 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 47 places, 89 transitions, 428 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-11-23 23:37:43,973 INFO L231 Difference]: Finished difference. Result has 51 places, 42 transitions, 173 flow [2024-11-23 23:37:43,973 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=39, PETRI_DIFFERENCE_MINUEND_FLOW=121, PETRI_DIFFERENCE_MINUEND_PLACES=39, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=39, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=29, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=173, PETRI_PLACES=51, PETRI_TRANSITIONS=42} [2024-11-23 23:37:43,975 INFO L279 CegarLoopForPetriNet]: 38 programPoint places, 13 predicate places. [2024-11-23 23:37:43,975 INFO L471 AbstractCegarLoop]: Abstraction has has 51 places, 42 transitions, 173 flow [2024-11-23 23:37:43,976 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 12.0) internal successors, (144), 12 states have internal predecessors, (144), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-23 23:37:43,976 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-23 23:37:43,976 INFO L206 CegarLoopForPetriNet]: trace histogram [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] [2024-11-23 23:37:43,987 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e14e5ed8-d474-4c9a-b98a-e2861b4e079a/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2024-11-23 23:37:44,177 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e14e5ed8-d474-4c9a-b98a-e2861b4e079a/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-23 23:37:44,177 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)] === [2024-11-23 23:37:44,177 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-23 23:37:44,178 INFO L85 PathProgramCache]: Analyzing trace with hash -695485923, now seen corresponding path program 2 times [2024-11-23 23:37:44,178 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-23 23:37:44,178 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [887710954] [2024-11-23 23:37:44,178 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-23 23:37:44,178 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-23 23:37:44,212 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2024-11-23 23:37:44,212 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-23 23:37:44,326 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2024-11-23 23:37:44,326 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-23 23:37:44,327 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [887710954] [2024-11-23 23:37:44,327 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [887710954] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-23 23:37:44,327 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-23 23:37:44,327 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-11-23 23:37:44,327 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [518251688] [2024-11-23 23:37:44,327 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-23 23:37:44,327 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-11-23 23:37:44,328 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-23 23:37:44,328 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-11-23 23:37:44,328 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2024-11-23 23:37:44,344 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 39 [2024-11-23 23:37:44,344 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 51 places, 42 transitions, 173 flow. Second operand has 5 states, 5 states have (on average 14.2) internal successors, (71), 5 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-23 23:37:44,345 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-23 23:37:44,345 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 39 [2024-11-23 23:37:44,345 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-23 23:37:44,819 INFO L124 PetriNetUnfolderBase]: 1119/1785 cut-off events. [2024-11-23 23:37:44,820 INFO L125 PetriNetUnfolderBase]: For 342/342 co-relation queries the response was YES. [2024-11-23 23:37:44,825 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3782 conditions, 1785 events. 1119/1785 cut-off events. For 342/342 co-relation queries the response was YES. Maximal size of possible extension queue 79. Compared 8496 event pairs, 452 based on Foata normal form. 13/1590 useless extension candidates. Maximal degree in co-relation 3747. Up to 886 conditions per place. [2024-11-23 23:37:44,833 INFO L140 encePairwiseOnDemand]: 34/39 looper letters, 64 selfloop transitions, 3 changer transitions 14/87 dead transitions. [2024-11-23 23:37:44,833 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 51 places, 87 transitions, 459 flow [2024-11-23 23:37:44,834 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-11-23 23:37:44,834 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-11-23 23:37:44,835 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 118 transitions. [2024-11-23 23:37:44,835 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.6051282051282051 [2024-11-23 23:37:44,835 INFO L175 Difference]: Start difference. First operand has 51 places, 42 transitions, 173 flow. Second operand 5 states and 118 transitions. [2024-11-23 23:37:44,835 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 51 places, 87 transitions, 459 flow [2024-11-23 23:37:44,844 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 47 places, 87 transitions, 433 flow, removed 10 selfloop flow, removed 4 redundant places. [2024-11-23 23:37:44,845 INFO L231 Difference]: Finished difference. Result has 50 places, 44 transitions, 177 flow [2024-11-23 23:37:44,846 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=39, PETRI_DIFFERENCE_MINUEND_FLOW=155, PETRI_DIFFERENCE_MINUEND_PLACES=43, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=42, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=39, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=177, PETRI_PLACES=50, PETRI_TRANSITIONS=44} [2024-11-23 23:37:44,846 INFO L279 CegarLoopForPetriNet]: 38 programPoint places, 12 predicate places. [2024-11-23 23:37:44,847 INFO L471 AbstractCegarLoop]: Abstraction has has 50 places, 44 transitions, 177 flow [2024-11-23 23:37:44,847 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 14.2) internal successors, (71), 5 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-23 23:37:44,847 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-23 23:37:44,847 INFO L206 CegarLoopForPetriNet]: trace histogram [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] [2024-11-23 23:37:44,847 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2024-11-23 23:37:44,848 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)] === [2024-11-23 23:37:44,848 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-23 23:37:44,848 INFO L85 PathProgramCache]: Analyzing trace with hash -1580892275, now seen corresponding path program 3 times [2024-11-23 23:37:44,849 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-23 23:37:44,849 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [468657127] [2024-11-23 23:37:44,849 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-23 23:37:44,849 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-23 23:37:44,899 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2024-11-23 23:37:44,899 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-23 23:37:45,026 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2024-11-23 23:37:45,026 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-23 23:37:45,026 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [468657127] [2024-11-23 23:37:45,026 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [468657127] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-23 23:37:45,027 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-23 23:37:45,027 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-11-23 23:37:45,027 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [39285731] [2024-11-23 23:37:45,027 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-23 23:37:45,027 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-11-23 23:37:45,028 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-23 23:37:45,028 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-11-23 23:37:45,028 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2024-11-23 23:37:45,039 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 39 [2024-11-23 23:37:45,040 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 50 places, 44 transitions, 177 flow. Second operand has 5 states, 5 states have (on average 14.2) internal successors, (71), 5 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-23 23:37:45,040 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-23 23:37:45,040 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 39 [2024-11-23 23:37:45,040 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-23 23:37:45,668 INFO L124 PetriNetUnfolderBase]: 1889/3087 cut-off events. [2024-11-23 23:37:45,668 INFO L125 PetriNetUnfolderBase]: For 1689/1689 co-relation queries the response was YES. [2024-11-23 23:37:45,683 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7350 conditions, 3087 events. 1889/3087 cut-off events. For 1689/1689 co-relation queries the response was YES. Maximal size of possible extension queue 130. Compared 16738 event pairs, 800 based on Foata normal form. 14/2863 useless extension candidates. Maximal degree in co-relation 7317. Up to 1492 conditions per place. [2024-11-23 23:37:45,752 INFO L140 encePairwiseOnDemand]: 34/39 looper letters, 68 selfloop transitions, 3 changer transitions 13/90 dead transitions. [2024-11-23 23:37:45,752 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 53 places, 90 transitions, 512 flow [2024-11-23 23:37:45,754 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-11-23 23:37:45,754 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-11-23 23:37:45,755 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 113 transitions. [2024-11-23 23:37:45,756 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.5794871794871795 [2024-11-23 23:37:45,756 INFO L175 Difference]: Start difference. First operand has 50 places, 44 transitions, 177 flow. Second operand 5 states and 113 transitions. [2024-11-23 23:37:45,756 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 53 places, 90 transitions, 512 flow [2024-11-23 23:37:45,771 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 51 places, 90 transitions, 490 flow, removed 7 selfloop flow, removed 2 redundant places. [2024-11-23 23:37:45,773 INFO L231 Difference]: Finished difference. Result has 54 places, 46 transitions, 193 flow [2024-11-23 23:37:45,774 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=39, PETRI_DIFFERENCE_MINUEND_FLOW=171, PETRI_DIFFERENCE_MINUEND_PLACES=47, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=44, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=41, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=193, PETRI_PLACES=54, PETRI_TRANSITIONS=46} [2024-11-23 23:37:45,775 INFO L279 CegarLoopForPetriNet]: 38 programPoint places, 16 predicate places. [2024-11-23 23:37:45,776 INFO L471 AbstractCegarLoop]: Abstraction has has 54 places, 46 transitions, 193 flow [2024-11-23 23:37:45,776 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 14.2) internal successors, (71), 5 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-23 23:37:45,777 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-23 23:37:45,778 INFO L206 CegarLoopForPetriNet]: trace histogram [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] [2024-11-23 23:37:45,778 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2024-11-23 23:37:45,778 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)] === [2024-11-23 23:37:45,779 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-23 23:37:45,779 INFO L85 PathProgramCache]: Analyzing trace with hash -1704167259, now seen corresponding path program 4 times [2024-11-23 23:37:45,779 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-23 23:37:45,780 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1778471584] [2024-11-23 23:37:45,780 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-11-23 23:37:45,780 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-23 23:37:45,809 INFO L229 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-11-23 23:37:45,809 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-23 23:37:45,865 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2024-11-23 23:37:45,865 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-23 23:37:45,866 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1778471584] [2024-11-23 23:37:45,866 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1778471584] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-23 23:37:45,866 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-23 23:37:45,866 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-11-23 23:37:45,866 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1958010364] [2024-11-23 23:37:45,866 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-23 23:37:45,866 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-11-23 23:37:45,866 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-23 23:37:45,867 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-11-23 23:37:45,867 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2024-11-23 23:37:45,883 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 39 [2024-11-23 23:37:45,884 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 54 places, 46 transitions, 193 flow. Second operand has 5 states, 5 states have (on average 14.2) internal successors, (71), 5 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-23 23:37:45,885 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-23 23:37:45,885 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 39 [2024-11-23 23:37:45,885 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-23 23:37:46,872 INFO L124 PetriNetUnfolderBase]: 2519/4061 cut-off events. [2024-11-23 23:37:46,873 INFO L125 PetriNetUnfolderBase]: For 2879/2879 co-relation queries the response was YES. [2024-11-23 23:37:46,886 INFO L83 FinitePrefix]: Finished finitePrefix Result has 10249 conditions, 4061 events. 2519/4061 cut-off events. For 2879/2879 co-relation queries the response was YES. Maximal size of possible extension queue 170. Compared 23011 event pairs, 640 based on Foata normal form. 46/3759 useless extension candidates. Maximal degree in co-relation 10214. Up to 1714 conditions per place. [2024-11-23 23:37:46,903 INFO L140 encePairwiseOnDemand]: 33/39 looper letters, 98 selfloop transitions, 16 changer transitions 0/120 dead transitions. [2024-11-23 23:37:46,903 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 60 places, 120 transitions, 705 flow [2024-11-23 23:37:46,904 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-11-23 23:37:46,904 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-11-23 23:37:46,906 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 163 transitions. [2024-11-23 23:37:46,907 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.5224358974358975 [2024-11-23 23:37:46,907 INFO L175 Difference]: Start difference. First operand has 54 places, 46 transitions, 193 flow. Second operand 8 states and 163 transitions. [2024-11-23 23:37:46,907 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 60 places, 120 transitions, 705 flow [2024-11-23 23:37:46,921 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 58 places, 120 transitions, 685 flow, removed 3 selfloop flow, removed 2 redundant places. [2024-11-23 23:37:46,924 INFO L231 Difference]: Finished difference. Result has 61 places, 59 transitions, 301 flow [2024-11-23 23:37:46,926 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=39, PETRI_DIFFERENCE_MINUEND_FLOW=189, PETRI_DIFFERENCE_MINUEND_PLACES=51, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=46, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=39, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=301, PETRI_PLACES=61, PETRI_TRANSITIONS=59} [2024-11-23 23:37:46,927 INFO L279 CegarLoopForPetriNet]: 38 programPoint places, 23 predicate places. [2024-11-23 23:37:46,927 INFO L471 AbstractCegarLoop]: Abstraction has has 61 places, 59 transitions, 301 flow [2024-11-23 23:37:46,927 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 14.2) internal successors, (71), 5 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-23 23:37:46,927 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-23 23:37:46,927 INFO L206 CegarLoopForPetriNet]: trace histogram [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] [2024-11-23 23:37:46,927 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2024-11-23 23:37:46,927 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)] === [2024-11-23 23:37:46,928 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-23 23:37:46,928 INFO L85 PathProgramCache]: Analyzing trace with hash -2016300841, now seen corresponding path program 5 times [2024-11-23 23:37:46,928 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-23 23:37:46,928 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2006160518] [2024-11-23 23:37:46,928 INFO L95 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-11-23 23:37:46,928 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-23 23:37:46,980 INFO L229 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-23 23:37:46,981 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-23 23:37:47,200 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-11-23 23:37:47,200 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-23 23:37:47,200 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2006160518] [2024-11-23 23:37:47,200 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2006160518] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-23 23:37:47,201 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [49263983] [2024-11-23 23:37:47,201 INFO L95 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-11-23 23:37:47,201 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-23 23:37:47,201 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e14e5ed8-d474-4c9a-b98a-e2861b4e079a/bin/uautomizer-verify-LYvppIcaGC/z3 [2024-11-23 23:37:47,203 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e14e5ed8-d474-4c9a-b98a-e2861b4e079a/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-23 23:37:47,208 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e14e5ed8-d474-4c9a-b98a-e2861b4e079a/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2024-11-23 23:37:47,378 INFO L229 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-23 23:37:47,378 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-23 23:37:47,380 INFO L256 TraceCheckSpWp]: Trace formula consists of 303 conjuncts, 7 conjuncts are in the unsatisfiable core [2024-11-23 23:37:47,382 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-23 23:37:47,497 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-11-23 23:37:47,498 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-23 23:37:47,588 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-11-23 23:37:47,588 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [49263983] provided 1 perfect and 1 imperfect interpolant sequences [2024-11-23 23:37:47,588 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2024-11-23 23:37:47,588 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [5, 5] total 11 [2024-11-23 23:37:47,589 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1309199228] [2024-11-23 23:37:47,589 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-23 23:37:47,589 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-11-23 23:37:47,589 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-23 23:37:47,589 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-11-23 23:37:47,590 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=88, Unknown=0, NotChecked=0, Total=132 [2024-11-23 23:37:47,600 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 39 [2024-11-23 23:37:47,600 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 61 places, 59 transitions, 301 flow. Second operand has 6 states, 6 states have (on average 13.333333333333334) internal successors, (80), 6 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-23 23:37:47,600 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-23 23:37:47,600 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 39 [2024-11-23 23:37:47,601 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-23 23:37:48,281 INFO L124 PetriNetUnfolderBase]: 2376/3769 cut-off events. [2024-11-23 23:37:48,282 INFO L125 PetriNetUnfolderBase]: For 6248/6322 co-relation queries the response was YES. [2024-11-23 23:37:48,301 INFO L83 FinitePrefix]: Finished finitePrefix Result has 10885 conditions, 3769 events. 2376/3769 cut-off events. For 6248/6322 co-relation queries the response was YES. Maximal size of possible extension queue 165. Compared 20424 event pairs, 555 based on Foata normal form. 122/3654 useless extension candidates. Maximal degree in co-relation 10848. Up to 2005 conditions per place. [2024-11-23 23:37:48,328 INFO L140 encePairwiseOnDemand]: 33/39 looper letters, 73 selfloop transitions, 7 changer transitions 0/86 dead transitions. [2024-11-23 23:37:48,328 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 65 places, 86 transitions, 617 flow [2024-11-23 23:37:48,329 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-11-23 23:37:48,329 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-11-23 23:37:48,330 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 98 transitions. [2024-11-23 23:37:48,330 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.4188034188034188 [2024-11-23 23:37:48,330 INFO L175 Difference]: Start difference. First operand has 61 places, 59 transitions, 301 flow. Second operand 6 states and 98 transitions. [2024-11-23 23:37:48,330 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 65 places, 86 transitions, 617 flow [2024-11-23 23:37:48,357 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 63 places, 86 transitions, 585 flow, removed 6 selfloop flow, removed 2 redundant places. [2024-11-23 23:37:48,363 INFO L231 Difference]: Finished difference. Result has 64 places, 59 transitions, 302 flow [2024-11-23 23:37:48,363 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=39, PETRI_DIFFERENCE_MINUEND_FLOW=279, PETRI_DIFFERENCE_MINUEND_PLACES=58, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=58, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=51, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=302, PETRI_PLACES=64, PETRI_TRANSITIONS=59} [2024-11-23 23:37:48,364 INFO L279 CegarLoopForPetriNet]: 38 programPoint places, 26 predicate places. [2024-11-23 23:37:48,364 INFO L471 AbstractCegarLoop]: Abstraction has has 64 places, 59 transitions, 302 flow [2024-11-23 23:37:48,364 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 13.333333333333334) internal successors, (80), 6 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-23 23:37:48,364 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-23 23:37:48,364 INFO L206 CegarLoopForPetriNet]: trace histogram [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, 1, 1] [2024-11-23 23:37:48,376 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e14e5ed8-d474-4c9a-b98a-e2861b4e079a/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2024-11-23 23:37:48,565 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e14e5ed8-d474-4c9a-b98a-e2861b4e079a/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-23 23:37:48,566 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)] === [2024-11-23 23:37:48,566 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-23 23:37:48,567 INFO L85 PathProgramCache]: Analyzing trace with hash 423409504, now seen corresponding path program 1 times [2024-11-23 23:37:48,568 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-23 23:37:48,568 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1924395246] [2024-11-23 23:37:48,568 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-23 23:37:48,568 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-23 23:37:48,625 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-23 23:37:49,007 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-11-23 23:37:49,009 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-23 23:37:49,009 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1924395246] [2024-11-23 23:37:49,010 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1924395246] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-23 23:37:49,010 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1608334931] [2024-11-23 23:37:49,010 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-23 23:37:49,010 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-23 23:37:49,010 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e14e5ed8-d474-4c9a-b98a-e2861b4e079a/bin/uautomizer-verify-LYvppIcaGC/z3 [2024-11-23 23:37:49,013 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e14e5ed8-d474-4c9a-b98a-e2861b4e079a/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-23 23:37:49,017 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e14e5ed8-d474-4c9a-b98a-e2861b4e079a/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2024-11-23 23:37:49,206 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-23 23:37:49,210 INFO L256 TraceCheckSpWp]: Trace formula consists of 318 conjuncts, 7 conjuncts are in the unsatisfiable core [2024-11-23 23:37:49,213 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-23 23:37:49,320 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-11-23 23:37:49,320 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-23 23:37:49,446 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-11-23 23:37:49,447 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1608334931] provided 1 perfect and 1 imperfect interpolant sequences [2024-11-23 23:37:49,447 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2024-11-23 23:37:49,447 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [6, 5] total 12 [2024-11-23 23:37:49,447 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1008555368] [2024-11-23 23:37:49,447 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-23 23:37:49,447 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-11-23 23:37:49,448 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-23 23:37:49,448 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-11-23 23:37:49,448 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=108, Unknown=0, NotChecked=0, Total=156 [2024-11-23 23:37:49,467 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 39 [2024-11-23 23:37:49,467 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 64 places, 59 transitions, 302 flow. Second operand has 6 states, 6 states have (on average 14.666666666666666) internal successors, (88), 6 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-23 23:37:49,468 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-23 23:37:49,468 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 39 [2024-11-23 23:37:49,468 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-23 23:37:49,892 INFO L124 PetriNetUnfolderBase]: 1260/2174 cut-off events. [2024-11-23 23:37:49,892 INFO L125 PetriNetUnfolderBase]: For 3679/3702 co-relation queries the response was YES. [2024-11-23 23:37:49,904 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6122 conditions, 2174 events. 1260/2174 cut-off events. For 3679/3702 co-relation queries the response was YES. Maximal size of possible extension queue 96. Compared 11621 event pairs, 466 based on Foata normal form. 172/2203 useless extension candidates. Maximal degree in co-relation 6081. Up to 1217 conditions per place. [2024-11-23 23:37:49,920 INFO L140 encePairwiseOnDemand]: 34/39 looper letters, 50 selfloop transitions, 9 changer transitions 0/67 dead transitions. [2024-11-23 23:37:49,920 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 68 places, 67 transitions, 431 flow [2024-11-23 23:37:49,920 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-11-23 23:37:49,920 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-11-23 23:37:49,921 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 105 transitions. [2024-11-23 23:37:49,921 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.44871794871794873 [2024-11-23 23:37:49,921 INFO L175 Difference]: Start difference. First operand has 64 places, 59 transitions, 302 flow. Second operand 6 states and 105 transitions. [2024-11-23 23:37:49,921 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 68 places, 67 transitions, 431 flow [2024-11-23 23:37:49,932 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 64 places, 67 transitions, 417 flow, removed 2 selfloop flow, removed 4 redundant places. [2024-11-23 23:37:49,933 INFO L231 Difference]: Finished difference. Result has 64 places, 54 transitions, 271 flow [2024-11-23 23:37:49,934 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=39, PETRI_DIFFERENCE_MINUEND_FLOW=253, PETRI_DIFFERENCE_MINUEND_PLACES=59, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=54, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=9, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=45, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=271, PETRI_PLACES=64, PETRI_TRANSITIONS=54} [2024-11-23 23:37:49,935 INFO L279 CegarLoopForPetriNet]: 38 programPoint places, 26 predicate places. [2024-11-23 23:37:49,936 INFO L471 AbstractCegarLoop]: Abstraction has has 64 places, 54 transitions, 271 flow [2024-11-23 23:37:49,937 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 14.666666666666666) internal successors, (88), 6 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-23 23:37:49,937 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-23 23:37:49,937 INFO L206 CegarLoopForPetriNet]: trace histogram [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, 1, 1, 1] [2024-11-23 23:37:49,948 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e14e5ed8-d474-4c9a-b98a-e2861b4e079a/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2024-11-23 23:37:50,138 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e14e5ed8-d474-4c9a-b98a-e2861b4e079a/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-23 23:37:50,142 INFO L396 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-11-23 23:37:50,142 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-23 23:37:50,142 INFO L85 PathProgramCache]: Analyzing trace with hash -429779358, now seen corresponding path program 1 times [2024-11-23 23:37:50,143 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-23 23:37:50,143 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [916123605] [2024-11-23 23:37:50,143 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-23 23:37:50,143 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-23 23:37:50,227 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-23 23:37:50,559 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2024-11-23 23:37:50,560 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-23 23:37:50,560 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [916123605] [2024-11-23 23:37:50,560 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [916123605] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-23 23:37:50,560 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-23 23:37:50,560 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-11-23 23:37:50,560 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [223386212] [2024-11-23 23:37:50,560 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-23 23:37:50,560 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-11-23 23:37:50,561 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-23 23:37:50,561 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-11-23 23:37:50,561 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2024-11-23 23:37:50,579 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 39 [2024-11-23 23:37:50,579 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 64 places, 54 transitions, 271 flow. Second operand has 5 states, 5 states have (on average 13.2) internal successors, (66), 5 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-23 23:37:50,579 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-23 23:37:50,580 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 39 [2024-11-23 23:37:50,580 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-23 23:37:51,138 INFO L124 PetriNetUnfolderBase]: 1761/2654 cut-off events. [2024-11-23 23:37:51,139 INFO L125 PetriNetUnfolderBase]: For 3493/3519 co-relation queries the response was YES. [2024-11-23 23:37:51,149 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7992 conditions, 2654 events. 1761/2654 cut-off events. For 3493/3519 co-relation queries the response was YES. Maximal size of possible extension queue 91. Compared 11656 event pairs, 448 based on Foata normal form. 79/2708 useless extension candidates. Maximal degree in co-relation 7951. Up to 1981 conditions per place. [2024-11-23 23:37:51,159 INFO L140 encePairwiseOnDemand]: 33/39 looper letters, 84 selfloop transitions, 9 changer transitions 8/106 dead transitions. [2024-11-23 23:37:51,160 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 69 places, 106 transitions, 727 flow [2024-11-23 23:37:51,160 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-11-23 23:37:51,160 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-11-23 23:37:51,161 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 111 transitions. [2024-11-23 23:37:51,161 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.47435897435897434 [2024-11-23 23:37:51,161 INFO L175 Difference]: Start difference. First operand has 64 places, 54 transitions, 271 flow. Second operand 6 states and 111 transitions. [2024-11-23 23:37:51,161 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 69 places, 106 transitions, 727 flow [2024-11-23 23:37:51,172 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 64 places, 106 transitions, 681 flow, removed 0 selfloop flow, removed 5 redundant places. [2024-11-23 23:37:51,173 INFO L231 Difference]: Finished difference. Result has 68 places, 63 transitions, 324 flow [2024-11-23 23:37:51,174 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=39, PETRI_DIFFERENCE_MINUEND_FLOW=253, PETRI_DIFFERENCE_MINUEND_PLACES=59, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=54, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=48, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=324, PETRI_PLACES=68, PETRI_TRANSITIONS=63} [2024-11-23 23:37:51,174 INFO L279 CegarLoopForPetriNet]: 38 programPoint places, 30 predicate places. [2024-11-23 23:37:51,174 INFO L471 AbstractCegarLoop]: Abstraction has has 68 places, 63 transitions, 324 flow [2024-11-23 23:37:51,175 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 13.2) internal successors, (66), 5 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-23 23:37:51,175 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-23 23:37:51,175 INFO L206 CegarLoopForPetriNet]: trace histogram [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, 1, 1, 1] [2024-11-23 23:37:51,175 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2024-11-23 23:37:51,175 INFO L396 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-11-23 23:37:51,176 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-23 23:37:51,176 INFO L85 PathProgramCache]: Analyzing trace with hash -1926347762, now seen corresponding path program 2 times [2024-11-23 23:37:51,176 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-23 23:37:51,176 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [322297449] [2024-11-23 23:37:51,176 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-23 23:37:51,176 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-23 23:37:51,345 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-23 23:37:51,345 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-23 23:37:54,904 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-23 23:37:54,905 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-23 23:37:54,905 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [322297449] [2024-11-23 23:37:54,905 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [322297449] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-23 23:37:54,905 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1445107238] [2024-11-23 23:37:54,905 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-23 23:37:54,905 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-23 23:37:54,905 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e14e5ed8-d474-4c9a-b98a-e2861b4e079a/bin/uautomizer-verify-LYvppIcaGC/z3 [2024-11-23 23:37:54,907 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e14e5ed8-d474-4c9a-b98a-e2861b4e079a/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-23 23:37:54,911 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e14e5ed8-d474-4c9a-b98a-e2861b4e079a/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2024-11-23 23:37:55,052 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-23 23:37:55,053 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-23 23:37:55,055 INFO L256 TraceCheckSpWp]: Trace formula consists of 323 conjuncts, 41 conjuncts are in the unsatisfiable core [2024-11-23 23:37:55,058 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-23 23:37:56,225 INFO L349 Elim1Store]: treesize reduction 40, result has 43.7 percent of original size [2024-11-23 23:37:56,227 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 8 case distinctions, treesize of input 128 treesize of output 93 [2024-11-23 23:38:16,195 WARN L286 SmtUtils]: Spent 13.61s on a formula simplification that was a NOOP. DAG size: 1084 (called from [L 346] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.arrays.Elim1Store.elim1) [2024-11-23 23:38:16,204 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-23 23:38:16,206 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 38 select indices, 38 select index equivalence classes, 1 disjoint index pairs (out of 703 index pairs), introduced 38 new quantified variables, introduced 703 case distinctions, treesize of input 734 treesize of output 3090 [2024-11-23 23:46:35,272 WARN L286 SmtUtils]: Spent 6.54s on a formula simplification. DAG size of input: 972 DAG size of output: 1028 (called from [L 728] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.simplify) [2024-11-23 23:46:44,269 WARN L286 SmtUtils]: Spent 6.45s on a formula simplification. DAG size of input: 970 DAG size of output: 1013 (called from [L 728] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.simplify) [2024-11-23 23:47:00,735 WARN L286 SmtUtils]: Spent 8.17s on a formula simplification. DAG size of input: 956 DAG size of output: 1006 (called from [L 728] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.simplify) [2024-11-23 23:47:10,585 WARN L286 SmtUtils]: Spent 7.09s on a formula simplification. DAG size of input: 954 DAG size of output: 1001 (called from [L 728] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.simplify) [2024-11-23 23:47:27,578 WARN L286 SmtUtils]: Spent 15.57s on a formula simplification. DAG size of input: 923 DAG size of output: 971 (called from [L 728] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.simplify) [2024-11-23 23:48:46,496 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e14e5ed8-d474-4c9a-b98a-e2861b4e079a/bin/uautomizer-verify-LYvppIcaGC/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Ended with exit code 101 [2024-11-23 23:48:46,496 WARN L249 Executor]: External (MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e14e5ed8-d474-4c9a-b98a-e2861b4e079a/bin/uautomizer-verify-LYvppIcaGC/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1) with exit command (exit)) stderr output: (error "out of memory") [2024-11-23 23:48:46,497 WARN L320 FreeRefinementEngine]: Global settings require throwing the following exception [2024-11-23 23:48:46,507 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e14e5ed8-d474-4c9a-b98a-e2861b4e079a/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2024-11-23 23:48:46,697 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e14e5ed8-d474-4c9a-b98a-e2861b4e079a/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2024-11-23 23:48:46,698 FATAL L? ?]: An unrecoverable error occured during an interaction with an SMT solver: de.uni_freiburg.informatik.ultimate.logic.SMTLIBException: External (MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e14e5ed8-d474-4c9a-b98a-e2861b4e079a/bin/uautomizer-verify-LYvppIcaGC/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1) with exit command (exit)) Received EOF on stdin. stderr output: (error "out of memory") at de.uni_freiburg.informatik.ultimate.smtsolver.external.Executor.parse(Executor.java:262) at de.uni_freiburg.informatik.ultimate.smtsolver.external.Executor.parseSuccess(Executor.java:277) at de.uni_freiburg.informatik.ultimate.smtsolver.external.Scriptor.assertTerm(Scriptor.java:147) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.arrays.DiffWrapperScript.assertTerm(DiffWrapperScript.java:111) at de.uni_freiburg.informatik.ultimate.logic.WrapperScript.assertTerm(WrapperScript.java:158) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.SimplifyDDA2.simplify(SimplifyDDA2.java:584) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.SmtUtils.simplify(SmtUtils.java:245) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.SmtUtils.simplifyWithStatistics(SmtUtils.java:318) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.simplify(QuantifierPusher.java:728) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPushTermWalker.convert(QuantifierPushTermWalker.java:133) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPushTermWalker.convert(QuantifierPushTermWalker.java:1) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.TermContextTransformationEngine$ApplicationTermTask.doStep(TermContextTransformationEngine.java:209) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.TermContextTransformationEngine.transform(TermContextTransformationEngine.java:100) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.TermContextTransformationEngine.transform(TermContextTransformationEngine.java:84) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPushTermWalker.eliminate(QuantifierPushTermWalker.java:297) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPushUtilsForSubsetPush.pushMinionEliminatees(QuantifierPushUtilsForSubsetPush.java:255) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPushUtilsForSubsetPush.sequentialSubsetPush(QuantifierPushUtilsForSubsetPush.java:151) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.tryToPushOverDualFiniteConnective(QuantifierPusher.java:337) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPushTermWalker.convert(QuantifierPushTermWalker.java:189) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPushTermWalker.convert(QuantifierPushTermWalker.java:1) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.TermContextTransformationEngine.transform(TermContextTransformationEngine.java:88) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.TermContextTransformationEngine.transform(TermContextTransformationEngine.java:84) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPushTermWalker.eliminate(QuantifierPushTermWalker.java:297) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPushTermWalker.eliminate(QuantifierPushTermWalker.java:283) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.PartialQuantifierElimination.eliminate(PartialQuantifierElimination.java:51) at de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.predicates.IterativePredicateTransformer$QuantifierEliminationPostprocessor.postprocess(IterativePredicateTransformer.java:234) at de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.predicates.IterativePredicateTransformer.applyPostprocessors(IterativePredicateTransformer.java:416) at de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.predicates.IterativePredicateTransformer.computeStrongestPostconditionSequence(IterativePredicateTransformer.java:195) at de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.singletracecheck.TraceCheckSpWp.computeInterpolantsUsingUnsatCore(TraceCheckSpWp.java:291) at de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.singletracecheck.TraceCheckSpWp.computeInterpolants(TraceCheckSpWp.java:181) at de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.singletracecheck.TraceCheckSpWp.(TraceCheckSpWp.java:160) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleSpWp.construct(IpTcStrategyModuleSpWp.java:106) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleSpWp.construct(IpTcStrategyModuleSpWp.java:1) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getOrConstruct(IpTcStrategyModuleBase.java:101) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getInterpolantComputationStatus(IpTcStrategyModuleBase.java:77) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.tryExecuteInterpolantGenerator(AutomatonFreeRefinementEngine.java:267) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.generateProof(AutomatonFreeRefinementEngine.java:148) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.executeStrategy(AutomatonFreeRefinementEngine.java:137) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.(AutomatonFreeRefinementEngine.java:85) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.TraceAbstractionRefinementEngine.(TraceAbstractionRefinementEngine.java:82) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.BasicCegarLoop.isCounterexampleFeasible(BasicCegarLoop.java:317) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.iterate(AbstractCegarLoop.java:407) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.startCegar(AbstractCegarLoop.java:342) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.runCegar(AbstractCegarLoop.java:324) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.executeCegarLoop(TraceAbstractionStarter.java:428) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseProgram(TraceAbstractionStarter.java:314) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseConcurrentProgram(TraceAbstractionStarter.java:238) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.runCegarLoops(TraceAbstractionStarter.java:165) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.(TraceAbstractionStarter.java:140) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver.finish(TraceAbstractionObserver.java:132) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runObserver(PluginConnector.java:167) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runTool(PluginConnector.java:150) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.run(PluginConnector.java:127) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.executePluginConnector(ToolchainWalker.java:233) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.processPlugin(ToolchainWalker.java:227) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walkUnprotected(ToolchainWalker.java:144) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walk(ToolchainWalker.java:106) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainManager$Toolchain.processToolchain(ToolchainManager.java:319) at de.uni_freiburg.informatik.ultimate.core.coreplugin.toolchain.DefaultToolchainJob.run(DefaultToolchainJob.java:145) at org.eclipse.core.internal.jobs.Worker.run(Worker.java:63) Caused by: de.uni_freiburg.informatik.ultimate.logic.SMTLIBException: EOF at de.uni_freiburg.informatik.ultimate.smtsolver.external.Parser$Action$.CUP$do_action(Parser.java:1518) at de.uni_freiburg.informatik.ultimate.smtsolver.external.Parser.do_action(Parser.java:701) at com.github.jhoenicke.javacup.runtime.LRParser.parse(LRParser.java:383) at de.uni_freiburg.informatik.ultimate.smtsolver.external.Executor.parse(Executor.java:258) ... 59 more [2024-11-23 23:48:46,704 INFO L158 Benchmark]: Toolchain (without parser) took 669095.74ms. Allocated memory was 117.4MB in the beginning and 1.3GB in the end (delta: 1.2GB). Free memory was 93.9MB in the beginning and 757.0MB in the end (delta: -663.1MB). Peak memory consumption was 808.4MB. Max. memory is 16.1GB. [2024-11-23 23:48:46,705 INFO L158 Benchmark]: CDTParser took 0.35ms. Allocated memory is still 167.8MB. Free memory is still 102.5MB. There was no memory consumed. Max. memory is 16.1GB. [2024-11-23 23:48:46,705 INFO L158 Benchmark]: CACSL2BoogieTranslator took 341.82ms. Allocated memory is still 117.4MB. Free memory was 93.9MB in the beginning and 81.1MB in the end (delta: 12.9MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. [2024-11-23 23:48:46,705 INFO L158 Benchmark]: Boogie Procedure Inliner took 60.12ms. Allocated memory is still 117.4MB. Free memory was 81.1MB in the beginning and 78.9MB in the end (delta: 2.1MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. [2024-11-23 23:48:46,706 INFO L158 Benchmark]: Boogie Preprocessor took 91.85ms. Allocated memory is still 117.4MB. Free memory was 78.9MB in the beginning and 76.7MB in the end (delta: 2.3MB). There was no memory consumed. Max. memory is 16.1GB. [2024-11-23 23:48:46,706 INFO L158 Benchmark]: RCFGBuilder took 1454.46ms. Allocated memory is still 117.4MB. Free memory was 76.3MB in the beginning and 48.9MB in the end (delta: 27.4MB). Peak memory consumption was 49.5MB. Max. memory is 16.1GB. [2024-11-23 23:48:46,706 INFO L158 Benchmark]: TraceAbstraction took 667137.73ms. Allocated memory was 117.4MB in the beginning and 1.3GB in the end (delta: 1.2GB). Free memory was 48.3MB in the beginning and 757.0MB in the end (delta: -708.7MB). Peak memory consumption was 761.4MB. Max. memory is 16.1GB. [2024-11-23 23:48:46,708 INFO L338 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.35ms. Allocated memory is still 167.8MB. Free memory is still 102.5MB. There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 341.82ms. Allocated memory is still 117.4MB. Free memory was 93.9MB in the beginning and 81.1MB in the end (delta: 12.9MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 60.12ms. Allocated memory is still 117.4MB. Free memory was 81.1MB in the beginning and 78.9MB in the end (delta: 2.1MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. * Boogie Preprocessor took 91.85ms. Allocated memory is still 117.4MB. Free memory was 78.9MB in the beginning and 76.7MB in the end (delta: 2.3MB). There was no memory consumed. Max. memory is 16.1GB. * RCFGBuilder took 1454.46ms. Allocated memory is still 117.4MB. Free memory was 76.3MB in the beginning and 48.9MB in the end (delta: 27.4MB). Peak memory consumption was 49.5MB. Max. memory is 16.1GB. * TraceAbstraction took 667137.73ms. Allocated memory was 117.4MB in the beginning and 1.3GB in the end (delta: 1.2GB). Free memory was 48.3MB in the beginning and 757.0MB in the end (delta: -708.7MB). Peak memory consumption was 761.4MB. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - ExceptionOrErrorResult: SMTLIBException: External (MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e14e5ed8-d474-4c9a-b98a-e2861b4e079a/bin/uautomizer-verify-LYvppIcaGC/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1) with exit command (exit)) Received EOF on stdin. stderr output: (error "out of memory") de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: SMTLIBException: External (MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e14e5ed8-d474-4c9a-b98a-e2861b4e079a/bin/uautomizer-verify-LYvppIcaGC/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1) with exit command (exit)) Received EOF on stdin. stderr output: (error "out of memory") : de.uni_freiburg.informatik.ultimate.smtsolver.external.Executor.parse(Executor.java:262) RESULT: Ultimate could not prove your program: Toolchain returned no result. Received shutdown request... --- End real Ultimate output --- Execution finished normally Using bit-precise analysis Retrying with bit-precise analysis ### Bit-precise run ### Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e14e5ed8-d474-4c9a-b98a-e2861b4e079a/bin/uautomizer-verify-LYvppIcaGC/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e14e5ed8-d474-4c9a-b98a-e2861b4e079a/bin/uautomizer-verify-LYvppIcaGC/plugins/org.eclipse.equinox.launcher_1.6.800.v20240513-1750.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e14e5ed8-d474-4c9a-b98a-e2861b4e079a/bin/uautomizer-verify-LYvppIcaGC/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e14e5ed8-d474-4c9a-b98a-e2861b4e079a/bin/uautomizer-verify-LYvppIcaGC/config/AutomizerReach.xml -i ../../sv-benchmarks/c/weaver/popl20-three-array-max.wvr.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e14e5ed8-d474-4c9a-b98a-e2861b4e079a/bin/uautomizer-verify-LYvppIcaGC/config/svcomp-Reach-32bit-Automizer_Bitvector.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e14e5ed8-d474-4c9a-b98a-e2861b4e079a/bin/uautomizer-verify-LYvppIcaGC --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 670814d0a16da58b0f26835e20c05a244e2f373856f13b9d4ff2a931783edf81 --- Real Ultimate output --- This is Ultimate 0.3.0-dev-6497de0 [2024-11-23 23:48:49,122 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-11-23 23:48:49,239 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e14e5ed8-d474-4c9a-b98a-e2861b4e079a/bin/uautomizer-verify-LYvppIcaGC/config/svcomp-Reach-32bit-Automizer_Bitvector.epf [2024-11-23 23:48:49,245 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-11-23 23:48:49,246 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-11-23 23:48:49,310 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-11-23 23:48:49,315 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-11-23 23:48:49,316 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-11-23 23:48:49,316 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-11-23 23:48:49,321 INFO L153 SettingsManager]: * Use memory slicer=true [2024-11-23 23:48:49,321 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-11-23 23:48:49,321 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-11-23 23:48:49,321 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-11-23 23:48:49,322 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-11-23 23:48:49,322 INFO L153 SettingsManager]: * Use SBE=true [2024-11-23 23:48:49,322 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-11-23 23:48:49,322 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-11-23 23:48:49,322 INFO L153 SettingsManager]: * sizeof long=4 [2024-11-23 23:48:49,322 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-11-23 23:48:49,322 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-11-23 23:48:49,322 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-11-23 23:48:49,322 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-11-23 23:48:49,323 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-11-23 23:48:49,323 INFO L153 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2024-11-23 23:48:49,324 INFO L153 SettingsManager]: * Use bitvectors instead of ints=true [2024-11-23 23:48:49,325 INFO L153 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2024-11-23 23:48:49,325 INFO L153 SettingsManager]: * sizeof long double=12 [2024-11-23 23:48:49,325 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-11-23 23:48:49,325 INFO L153 SettingsManager]: * Behaviour of calls to undefined functions=OVERAPPROXIMATE_BEHAVIOUR [2024-11-23 23:48:49,325 INFO L153 SettingsManager]: * Use constant arrays=true [2024-11-23 23:48:49,325 INFO L151 SettingsManager]: Preferences of IcfgBuilder differ from their defaults: [2024-11-23 23:48:49,325 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-11-23 23:48:49,325 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-11-23 23:48:49,325 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-11-23 23:48:49,325 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-11-23 23:48:49,325 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-11-23 23:48:49,326 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-11-23 23:48:49,326 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-11-23 23:48:49,326 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-11-23 23:48:49,326 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-11-23 23:48:49,326 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-11-23 23:48:49,326 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-11-23 23:48:49,326 INFO L153 SettingsManager]: * Compute procedure contracts=false [2024-11-23 23:48:49,326 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-11-23 23:48:49,326 INFO L153 SettingsManager]: * Trace refinement strategy=FOX [2024-11-23 23:48:49,326 INFO L153 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2024-11-23 23:48:49,326 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-11-23 23:48:49,326 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-11-23 23:48:49,327 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-11-23 23:48:49,327 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-11-23 23:48:49,327 INFO L153 SettingsManager]: * Looper check in Petri net analysis=SEMANTIC 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 -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e14e5ed8-d474-4c9a-b98a-e2861b4e079a/bin/uautomizer-verify-LYvppIcaGC 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 -> 670814d0a16da58b0f26835e20c05a244e2f373856f13b9d4ff2a931783edf81 [2024-11-23 23:48:49,683 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-11-23 23:48:49,697 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-11-23 23:48:49,701 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-11-23 23:48:49,703 INFO L270 PluginConnector]: Initializing CDTParser... [2024-11-23 23:48:49,703 INFO L274 PluginConnector]: CDTParser initialized [2024-11-23 23:48:49,704 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e14e5ed8-d474-4c9a-b98a-e2861b4e079a/bin/uautomizer-verify-LYvppIcaGC/../../sv-benchmarks/c/weaver/popl20-three-array-max.wvr.c [2024-11-23 23:48:52,681 INFO L533 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e14e5ed8-d474-4c9a-b98a-e2861b4e079a/bin/uautomizer-verify-LYvppIcaGC/data/49ef941ee/99bf1067f8f244d9b15542200aaaec0a/FLAGdd201ed8b [2024-11-23 23:48:52,992 INFO L384 CDTParser]: Found 1 translation units. [2024-11-23 23:48:52,993 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e14e5ed8-d474-4c9a-b98a-e2861b4e079a/sv-benchmarks/c/weaver/popl20-three-array-max.wvr.c [2024-11-23 23:48:53,017 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e14e5ed8-d474-4c9a-b98a-e2861b4e079a/bin/uautomizer-verify-LYvppIcaGC/data/49ef941ee/99bf1067f8f244d9b15542200aaaec0a/FLAGdd201ed8b [2024-11-23 23:48:53,064 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e14e5ed8-d474-4c9a-b98a-e2861b4e079a/bin/uautomizer-verify-LYvppIcaGC/data/49ef941ee/99bf1067f8f244d9b15542200aaaec0a [2024-11-23 23:48:53,070 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-11-23 23:48:53,072 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2024-11-23 23:48:53,076 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-11-23 23:48:53,077 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-11-23 23:48:53,082 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-11-23 23:48:53,083 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 11:48:53" (1/1) ... [2024-11-23 23:48:53,084 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@2c57e6c5 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 11:48:53, skipping insertion in model container [2024-11-23 23:48:53,084 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 11:48:53" (1/1) ... [2024-11-23 23:48:53,102 INFO L175 MainTranslator]: Built tables and reachable declarations [2024-11-23 23:48:53,375 WARN L250 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e14e5ed8-d474-4c9a-b98a-e2861b4e079a/sv-benchmarks/c/weaver/popl20-three-array-max.wvr.c[2862,2875] [2024-11-23 23:48:53,387 WARN L1063 CHandler]: saw a pointer cast to a type that we could not get a type size for, not adapting memory model [2024-11-23 23:48:53,398 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-23 23:48:53,421 INFO L200 MainTranslator]: Completed pre-run [2024-11-23 23:48:53,460 WARN L250 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e14e5ed8-d474-4c9a-b98a-e2861b4e079a/sv-benchmarks/c/weaver/popl20-three-array-max.wvr.c[2862,2875] [2024-11-23 23:48:53,466 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-23 23:48:53,488 INFO L204 MainTranslator]: Completed translation [2024-11-23 23:48:53,489 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 11:48:53 WrapperNode [2024-11-23 23:48:53,489 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-11-23 23:48:53,491 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-11-23 23:48:53,492 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-11-23 23:48:53,492 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-11-23 23:48:53,502 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 11:48:53" (1/1) ... [2024-11-23 23:48:53,520 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 11:48:53" (1/1) ... [2024-11-23 23:48:53,568 INFO L138 Inliner]: procedures = 27, calls = 42, calls flagged for inlining = 14, calls inlined = 22, statements flattened = 211 [2024-11-23 23:48:53,569 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-11-23 23:48:53,570 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-11-23 23:48:53,570 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-11-23 23:48:53,570 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-11-23 23:48:53,579 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 11:48:53" (1/1) ... [2024-11-23 23:48:53,580 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 11:48:53" (1/1) ... [2024-11-23 23:48:53,584 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 11:48:53" (1/1) ... [2024-11-23 23:48:53,602 INFO L175 MemorySlicer]: Split 18 memory accesses to 2 slices as follows [2, 16]. 89 percent of accesses are in the largest equivalence class. The 2 initializations are split as follows [2, 0]. The 4 writes are split as follows [0, 4]. [2024-11-23 23:48:53,602 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 11:48:53" (1/1) ... [2024-11-23 23:48:53,603 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 11:48:53" (1/1) ... [2024-11-23 23:48:53,627 INFO L184 PluginConnector]: Executing the observer ReplaceArrayAssignments from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 11:48:53" (1/1) ... [2024-11-23 23:48:53,629 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 11:48:53" (1/1) ... [2024-11-23 23:48:53,637 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 11:48:53" (1/1) ... [2024-11-23 23:48:53,643 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 11:48:53" (1/1) ... [2024-11-23 23:48:53,648 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 11:48:53" (1/1) ... [2024-11-23 23:48:53,651 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-11-23 23:48:53,655 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-11-23 23:48:53,655 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-11-23 23:48:53,655 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-11-23 23:48:53,656 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 11:48:53" (1/1) ... [2024-11-23 23:48:53,665 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-11-23 23:48:53,680 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e14e5ed8-d474-4c9a-b98a-e2861b4e079a/bin/uautomizer-verify-LYvppIcaGC/z3 [2024-11-23 23:48:53,693 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e14e5ed8-d474-4c9a-b98a-e2861b4e079a/bin/uautomizer-verify-LYvppIcaGC/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (exit command is (exit), workingDir is null) [2024-11-23 23:48:53,701 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e14e5ed8-d474-4c9a-b98a-e2861b4e079a/bin/uautomizer-verify-LYvppIcaGC/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Waiting until timeout for monitored process [2024-11-23 23:48:53,726 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-11-23 23:48:53,726 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1#0 [2024-11-23 23:48:53,726 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1#1 [2024-11-23 23:48:53,726 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE4#0 [2024-11-23 23:48:53,726 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE4#1 [2024-11-23 23:48:53,726 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2024-11-23 23:48:53,727 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2024-11-23 23:48:53,727 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2024-11-23 23:48:53,727 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2024-11-23 23:48:53,727 INFO L130 BoogieDeclarations]: Found specification of procedure thread3 [2024-11-23 23:48:53,728 INFO L138 BoogieDeclarations]: Found implementation of procedure thread3 [2024-11-23 23:48:53,728 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2024-11-23 23:48:53,728 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2024-11-23 23:48:53,728 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2024-11-23 23:48:53,728 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-11-23 23:48:53,729 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-11-23 23:48:53,729 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE4#0 [2024-11-23 23:48:53,729 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE4#1 [2024-11-23 23:48:53,731 WARN L203 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement. [2024-11-23 23:48:53,893 INFO L234 CfgBuilder]: Building ICFG [2024-11-23 23:48:53,895 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2024-11-23 23:48:54,502 INFO L279 CfgBuilder]: Omitted future-live optimization because the input is a concurrent program. [2024-11-23 23:48:54,505 INFO L283 CfgBuilder]: Performing block encoding [2024-11-23 23:48:55,117 INFO L307 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-11-23 23:48:55,117 INFO L312 CfgBuilder]: Removed 6 assume(true) statements. [2024-11-23 23:48:55,118 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 11:48:55 BoogieIcfgContainer [2024-11-23 23:48:55,118 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-11-23 23:48:55,122 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-11-23 23:48:55,122 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-11-23 23:48:55,127 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-11-23 23:48:55,127 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 23.11 11:48:53" (1/3) ... [2024-11-23 23:48:55,128 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3765452d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 11:48:55, skipping insertion in model container [2024-11-23 23:48:55,128 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 11:48:53" (2/3) ... [2024-11-23 23:48:55,130 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3765452d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 11:48:55, skipping insertion in model container [2024-11-23 23:48:55,131 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 11:48:55" (3/3) ... [2024-11-23 23:48:55,133 INFO L128 eAbstractionObserver]: Analyzing ICFG popl20-three-array-max.wvr.c [2024-11-23 23:48:55,150 INFO L216 ceAbstractionStarter]: Automizer settings: Hoare:LoopHeads NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-11-23 23:48:55,151 INFO L151 ceAbstractionStarter]: Applying trace abstraction to ICFG popl20-three-array-max.wvr.c that has 4 procedures, 33 locations, 1 initial locations, 6 loop locations, and 1 error locations. [2024-11-23 23:48:55,152 INFO L491 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2024-11-23 23:48:55,239 INFO L143 ThreadInstanceAdder]: Constructed 3 joinOtherThreadTransitions. [2024-11-23 23:48:55,285 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 42 places, 39 transitions, 99 flow [2024-11-23 23:48:55,335 INFO L124 PetriNetUnfolderBase]: 7/36 cut-off events. [2024-11-23 23:48:55,339 INFO L125 PetriNetUnfolderBase]: For 3/3 co-relation queries the response was YES. [2024-11-23 23:48:55,344 INFO L83 FinitePrefix]: Finished finitePrefix Result has 49 conditions, 36 events. 7/36 cut-off events. For 3/3 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 43 event pairs, 0 based on Foata normal form. 0/28 useless extension candidates. Maximal degree in co-relation 26. Up to 2 conditions per place. [2024-11-23 23:48:55,345 INFO L82 GeneralOperation]: Start removeDead. Operand has 42 places, 39 transitions, 99 flow [2024-11-23 23:48:55,349 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 38 places, 35 transitions, 88 flow [2024-11-23 23:48:55,363 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-11-23 23:48:55,380 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;@3ffd9e59, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-11-23 23:48:55,380 INFO L334 AbstractCegarLoop]: Starting to check reachability of 4 error locations. [2024-11-23 23:48:55,406 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2024-11-23 23:48:55,406 INFO L124 PetriNetUnfolderBase]: 7/34 cut-off events. [2024-11-23 23:48:55,406 INFO L125 PetriNetUnfolderBase]: For 3/3 co-relation queries the response was YES. [2024-11-23 23:48:55,406 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-23 23:48:55,407 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-23 23:48:55,407 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)] === [2024-11-23 23:48:55,413 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-23 23:48:55,413 INFO L85 PathProgramCache]: Analyzing trace with hash -1559889122, now seen corresponding path program 1 times [2024-11-23 23:48:55,427 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2024-11-23 23:48:55,428 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [25824001] [2024-11-23 23:48:55,428 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-23 23:48:55,429 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-23 23:48:55,429 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e14e5ed8-d474-4c9a-b98a-e2861b4e079a/bin/uautomizer-verify-LYvppIcaGC/z3 [2024-11-23 23:48:55,431 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e14e5ed8-d474-4c9a-b98a-e2861b4e079a/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-23 23:48:55,438 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e14e5ed8-d474-4c9a-b98a-e2861b4e079a/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2024-11-23 23:48:55,630 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-23 23:48:55,637 INFO L256 TraceCheckSpWp]: Trace formula consists of 135 conjuncts, 9 conjuncts are in the unsatisfiable core [2024-11-23 23:48:55,643 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-23 23:48:55,742 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-23 23:48:55,743 INFO L308 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-23 23:48:55,745 INFO L136 FreeRefinementEngine]: Strategy FOX found an infeasible trace [2024-11-23 23:48:55,745 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [25824001] [2024-11-23 23:48:55,746 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [25824001] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-23 23:48:55,746 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-23 23:48:55,746 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-11-23 23:48:55,748 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1631521592] [2024-11-23 23:48:55,750 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-23 23:48:55,757 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-23 23:48:55,762 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FOX [2024-11-23 23:48:55,790 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-23 23:48:55,791 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-23 23:48:55,804 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 39 [2024-11-23 23:48:55,807 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 38 places, 35 transitions, 88 flow. Second operand has 3 states, 3 states have (on average 16.666666666666668) internal successors, (50), 3 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-23 23:48:55,807 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-23 23:48:55,807 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 39 [2024-11-23 23:48:55,810 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-23 23:48:56,186 INFO L124 PetriNetUnfolderBase]: 378/600 cut-off events. [2024-11-23 23:48:56,186 INFO L125 PetriNetUnfolderBase]: For 49/49 co-relation queries the response was YES. [2024-11-23 23:48:56,194 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1183 conditions, 600 events. 378/600 cut-off events. For 49/49 co-relation queries the response was YES. Maximal size of possible extension queue 36. Compared 2166 event pairs, 251 based on Foata normal form. 0/519 useless extension candidates. Maximal degree in co-relation 993. Up to 520 conditions per place. [2024-11-23 23:48:56,205 INFO L140 encePairwiseOnDemand]: 36/39 looper letters, 27 selfloop transitions, 2 changer transitions 0/36 dead transitions. [2024-11-23 23:48:56,206 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 40 places, 36 transitions, 148 flow [2024-11-23 23:48:56,208 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-23 23:48:56,210 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-11-23 23:48:56,222 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 60 transitions. [2024-11-23 23:48:56,224 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.5128205128205128 [2024-11-23 23:48:56,226 INFO L175 Difference]: Start difference. First operand has 38 places, 35 transitions, 88 flow. Second operand 3 states and 60 transitions. [2024-11-23 23:48:56,227 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 40 places, 36 transitions, 148 flow [2024-11-23 23:48:56,236 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 34 places, 36 transitions, 136 flow, removed 0 selfloop flow, removed 6 redundant places. [2024-11-23 23:48:56,240 INFO L231 Difference]: Finished difference. Result has 35 places, 36 transitions, 88 flow [2024-11-23 23:48:56,243 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=39, PETRI_DIFFERENCE_MINUEND_FLOW=76, PETRI_DIFFERENCE_MINUEND_PLACES=32, 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=88, PETRI_PLACES=35, PETRI_TRANSITIONS=36} [2024-11-23 23:48:56,249 INFO L279 CegarLoopForPetriNet]: 38 programPoint places, -3 predicate places. [2024-11-23 23:48:56,250 INFO L471 AbstractCegarLoop]: Abstraction has has 35 places, 36 transitions, 88 flow [2024-11-23 23:48:56,250 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 16.666666666666668) internal successors, (50), 3 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-23 23:48:56,250 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-23 23:48:56,250 INFO L206 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] [2024-11-23 23:48:56,263 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e14e5ed8-d474-4c9a-b98a-e2861b4e079a/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2024-11-23 23:48:56,454 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e14e5ed8-d474-4c9a-b98a-e2861b4e079a/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-23 23:48:56,454 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)] === [2024-11-23 23:48:56,455 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-23 23:48:56,455 INFO L85 PathProgramCache]: Analyzing trace with hash 129434060, now seen corresponding path program 1 times [2024-11-23 23:48:56,456 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2024-11-23 23:48:56,456 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [381032771] [2024-11-23 23:48:56,456 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-23 23:48:56,456 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-23 23:48:56,456 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e14e5ed8-d474-4c9a-b98a-e2861b4e079a/bin/uautomizer-verify-LYvppIcaGC/z3 [2024-11-23 23:48:56,460 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e14e5ed8-d474-4c9a-b98a-e2861b4e079a/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-23 23:48:56,461 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e14e5ed8-d474-4c9a-b98a-e2861b4e079a/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2024-11-23 23:48:56,602 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-23 23:48:56,606 INFO L256 TraceCheckSpWp]: Trace formula consists of 140 conjuncts, 13 conjuncts are in the unsatisfiable core [2024-11-23 23:48:56,608 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-23 23:48:56,726 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-23 23:48:56,726 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-23 23:48:56,861 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-23 23:48:56,861 INFO L136 FreeRefinementEngine]: Strategy FOX found an infeasible trace [2024-11-23 23:48:56,861 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [381032771] [2024-11-23 23:48:56,862 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [381032771] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-23 23:48:56,862 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-11-23 23:48:56,862 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 7 [2024-11-23 23:48:56,862 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1478684149] [2024-11-23 23:48:56,862 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-11-23 23:48:56,864 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-11-23 23:48:56,864 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FOX [2024-11-23 23:48:56,865 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-11-23 23:48:56,865 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2024-11-23 23:48:56,902 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 39 [2024-11-23 23:48:56,903 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 35 places, 36 transitions, 88 flow. Second operand has 8 states, 8 states have (on average 13.125) internal successors, (105), 8 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-23 23:48:56,904 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-23 23:48:56,904 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 39 [2024-11-23 23:48:56,904 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-23 23:48:57,906 INFO L124 PetriNetUnfolderBase]: 763/1218 cut-off events. [2024-11-23 23:48:57,907 INFO L125 PetriNetUnfolderBase]: For 18/18 co-relation queries the response was YES. [2024-11-23 23:48:57,911 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2323 conditions, 1218 events. 763/1218 cut-off events. For 18/18 co-relation queries the response was YES. Maximal size of possible extension queue 69. Compared 5247 event pairs, 502 based on Foata normal form. 0/1048 useless extension candidates. Maximal degree in co-relation 2312. Up to 521 conditions per place. [2024-11-23 23:48:57,918 INFO L140 encePairwiseOnDemand]: 32/39 looper letters, 48 selfloop transitions, 28 changer transitions 0/83 dead transitions. [2024-11-23 23:48:57,918 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 42 places, 83 transitions, 352 flow [2024-11-23 23:48:57,920 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-11-23 23:48:57,920 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-11-23 23:48:57,921 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 160 transitions. [2024-11-23 23:48:57,922 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.5128205128205128 [2024-11-23 23:48:57,922 INFO L175 Difference]: Start difference. First operand has 35 places, 36 transitions, 88 flow. Second operand 8 states and 160 transitions. [2024-11-23 23:48:57,922 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 42 places, 83 transitions, 352 flow [2024-11-23 23:48:57,923 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 41 places, 83 transitions, 348 flow, removed 1 selfloop flow, removed 1 redundant places. [2024-11-23 23:48:57,925 INFO L231 Difference]: Finished difference. Result has 41 places, 62 transitions, 216 flow [2024-11-23 23:48:57,925 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=39, PETRI_DIFFERENCE_MINUEND_FLOW=84, PETRI_DIFFERENCE_MINUEND_PLACES=34, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=36, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=8, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=28, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=216, PETRI_PLACES=41, PETRI_TRANSITIONS=62} [2024-11-23 23:48:57,926 INFO L279 CegarLoopForPetriNet]: 38 programPoint places, 3 predicate places. [2024-11-23 23:48:57,926 INFO L471 AbstractCegarLoop]: Abstraction has has 41 places, 62 transitions, 216 flow [2024-11-23 23:48:57,926 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 13.125) internal successors, (105), 8 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-23 23:48:57,927 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-23 23:48:57,927 INFO L206 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] [2024-11-23 23:48:57,938 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e14e5ed8-d474-4c9a-b98a-e2861b4e079a/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2024-11-23 23:48:58,131 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e14e5ed8-d474-4c9a-b98a-e2861b4e079a/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-23 23:48:58,131 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)] === [2024-11-23 23:48:58,132 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-23 23:48:58,132 INFO L85 PathProgramCache]: Analyzing trace with hash -1176905417, now seen corresponding path program 1 times [2024-11-23 23:48:58,132 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2024-11-23 23:48:58,132 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [101582402] [2024-11-23 23:48:58,132 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-23 23:48:58,132 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-23 23:48:58,132 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e14e5ed8-d474-4c9a-b98a-e2861b4e079a/bin/uautomizer-verify-LYvppIcaGC/z3 [2024-11-23 23:48:58,134 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e14e5ed8-d474-4c9a-b98a-e2861b4e079a/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-23 23:48:58,136 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e14e5ed8-d474-4c9a-b98a-e2861b4e079a/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2024-11-23 23:48:58,612 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-23 23:48:58,620 INFO L256 TraceCheckSpWp]: Trace formula consists of 150 conjuncts, 9 conjuncts are in the unsatisfiable core [2024-11-23 23:48:58,622 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-23 23:48:58,687 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-23 23:48:58,689 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 52 treesize of output 36 [2024-11-23 23:48:59,148 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-11-23 23:48:59,149 INFO L308 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-23 23:48:59,149 INFO L136 FreeRefinementEngine]: Strategy FOX found an infeasible trace [2024-11-23 23:48:59,149 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [101582402] [2024-11-23 23:48:59,149 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [101582402] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-23 23:48:59,150 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-23 23:48:59,150 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-11-23 23:48:59,150 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1989308594] [2024-11-23 23:48:59,150 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-23 23:48:59,150 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-23 23:48:59,151 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FOX [2024-11-23 23:48:59,152 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-23 23:48:59,152 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-23 23:48:59,152 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 39 [2024-11-23 23:48:59,152 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 41 places, 62 transitions, 216 flow. Second operand has 3 states, 3 states have (on average 17.666666666666668) internal successors, (53), 3 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-23 23:48:59,152 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-23 23:48:59,153 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 39 [2024-11-23 23:48:59,153 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-23 23:48:59,722 INFO L124 PetriNetUnfolderBase]: 1259/1986 cut-off events. [2024-11-23 23:48:59,722 INFO L125 PetriNetUnfolderBase]: For 28/28 co-relation queries the response was YES. [2024-11-23 23:48:59,727 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3821 conditions, 1986 events. 1259/1986 cut-off events. For 28/28 co-relation queries the response was YES. Maximal size of possible extension queue 108. Compared 9618 event pairs, 344 based on Foata normal form. 2/1702 useless extension candidates. Maximal degree in co-relation 1910. Up to 1069 conditions per place. [2024-11-23 23:48:59,736 INFO L140 encePairwiseOnDemand]: 35/39 looper letters, 69 selfloop transitions, 3 changer transitions 1/80 dead transitions. [2024-11-23 23:48:59,736 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 43 places, 80 transitions, 403 flow [2024-11-23 23:48:59,738 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-23 23:48:59,738 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-11-23 23:48:59,739 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 77 transitions. [2024-11-23 23:48:59,739 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.6581196581196581 [2024-11-23 23:48:59,740 INFO L175 Difference]: Start difference. First operand has 41 places, 62 transitions, 216 flow. Second operand 3 states and 77 transitions. [2024-11-23 23:48:59,740 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 43 places, 80 transitions, 403 flow [2024-11-23 23:48:59,741 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 42 places, 80 transitions, 385 flow, removed 8 selfloop flow, removed 1 redundant places. [2024-11-23 23:48:59,743 INFO L231 Difference]: Finished difference. Result has 43 places, 64 transitions, 217 flow [2024-11-23 23:48:59,743 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=39, PETRI_DIFFERENCE_MINUEND_FLOW=198, PETRI_DIFFERENCE_MINUEND_PLACES=40, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=62, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=59, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=217, PETRI_PLACES=43, PETRI_TRANSITIONS=64} [2024-11-23 23:48:59,744 INFO L279 CegarLoopForPetriNet]: 38 programPoint places, 5 predicate places. [2024-11-23 23:48:59,744 INFO L471 AbstractCegarLoop]: Abstraction has has 43 places, 64 transitions, 217 flow [2024-11-23 23:48:59,745 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 17.666666666666668) internal successors, (53), 3 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-23 23:48:59,745 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-23 23:48:59,745 INFO L206 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] [2024-11-23 23:48:59,757 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e14e5ed8-d474-4c9a-b98a-e2861b4e079a/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2024-11-23 23:48:59,949 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e14e5ed8-d474-4c9a-b98a-e2861b4e079a/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-23 23:48:59,950 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)] === [2024-11-23 23:48:59,950 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-23 23:48:59,950 INFO L85 PathProgramCache]: Analyzing trace with hash 768456811, now seen corresponding path program 1 times [2024-11-23 23:48:59,951 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2024-11-23 23:48:59,951 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [259441378] [2024-11-23 23:48:59,951 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-23 23:48:59,951 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-23 23:48:59,952 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e14e5ed8-d474-4c9a-b98a-e2861b4e079a/bin/uautomizer-verify-LYvppIcaGC/z3 [2024-11-23 23:48:59,954 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e14e5ed8-d474-4c9a-b98a-e2861b4e079a/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-23 23:48:59,957 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e14e5ed8-d474-4c9a-b98a-e2861b4e079a/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2024-11-23 23:49:00,094 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-23 23:49:00,100 INFO L256 TraceCheckSpWp]: Trace formula consists of 154 conjuncts, 8 conjuncts are in the unsatisfiable core [2024-11-23 23:49:00,102 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-23 23:49:00,303 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-11-23 23:49:00,304 INFO L308 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-23 23:49:00,304 INFO L136 FreeRefinementEngine]: Strategy FOX found an infeasible trace [2024-11-23 23:49:00,304 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [259441378] [2024-11-23 23:49:00,304 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [259441378] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-23 23:49:00,304 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-23 23:49:00,304 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-11-23 23:49:00,305 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1925047215] [2024-11-23 23:49:00,305 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-23 23:49:00,305 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-11-23 23:49:00,305 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FOX [2024-11-23 23:49:00,306 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-11-23 23:49:00,306 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=16, Unknown=0, NotChecked=0, Total=30 [2024-11-23 23:49:00,333 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 39 [2024-11-23 23:49:00,334 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 43 places, 64 transitions, 217 flow. Second operand has 6 states, 6 states have (on average 14.0) internal successors, (84), 6 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-23 23:49:00,334 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-23 23:49:00,334 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 39 [2024-11-23 23:49:00,334 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-23 23:49:01,027 INFO L124 PetriNetUnfolderBase]: 1657/2600 cut-off events. [2024-11-23 23:49:01,028 INFO L125 PetriNetUnfolderBase]: For 334/334 co-relation queries the response was YES. [2024-11-23 23:49:01,035 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5538 conditions, 2600 events. 1657/2600 cut-off events. For 334/334 co-relation queries the response was YES. Maximal size of possible extension queue 132. Compared 13069 event pairs, 682 based on Foata normal form. 28/2484 useless extension candidates. Maximal degree in co-relation 2715. Up to 1652 conditions per place. [2024-11-23 23:49:01,047 INFO L140 encePairwiseOnDemand]: 32/39 looper letters, 84 selfloop transitions, 12 changer transitions 0/103 dead transitions. [2024-11-23 23:49:01,047 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 48 places, 103 transitions, 513 flow [2024-11-23 23:49:01,048 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-11-23 23:49:01,048 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-11-23 23:49:01,049 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 124 transitions. [2024-11-23 23:49:01,049 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.5299145299145299 [2024-11-23 23:49:01,050 INFO L175 Difference]: Start difference. First operand has 43 places, 64 transitions, 217 flow. Second operand 6 states and 124 transitions. [2024-11-23 23:49:01,050 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 48 places, 103 transitions, 513 flow [2024-11-23 23:49:01,051 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 47 places, 103 transitions, 506 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-11-23 23:49:01,055 INFO L231 Difference]: Finished difference. Result has 49 places, 73 transitions, 284 flow [2024-11-23 23:49:01,056 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=39, PETRI_DIFFERENCE_MINUEND_FLOW=214, PETRI_DIFFERENCE_MINUEND_PLACES=42, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=64, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=56, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=284, PETRI_PLACES=49, PETRI_TRANSITIONS=73} [2024-11-23 23:49:01,057 INFO L279 CegarLoopForPetriNet]: 38 programPoint places, 11 predicate places. [2024-11-23 23:49:01,058 INFO L471 AbstractCegarLoop]: Abstraction has has 49 places, 73 transitions, 284 flow [2024-11-23 23:49:01,058 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 14.0) internal successors, (84), 6 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-23 23:49:01,058 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-23 23:49:01,058 INFO L206 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] [2024-11-23 23:49:01,069 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e14e5ed8-d474-4c9a-b98a-e2861b4e079a/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2024-11-23 23:49:01,263 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e14e5ed8-d474-4c9a-b98a-e2861b4e079a/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-23 23:49:01,263 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)] === [2024-11-23 23:49:01,264 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-23 23:49:01,264 INFO L85 PathProgramCache]: Analyzing trace with hash -1980131239, now seen corresponding path program 2 times [2024-11-23 23:49:01,265 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2024-11-23 23:49:01,267 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [391060138] [2024-11-23 23:49:01,267 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-23 23:49:01,267 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-23 23:49:01,267 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e14e5ed8-d474-4c9a-b98a-e2861b4e079a/bin/uautomizer-verify-LYvppIcaGC/z3 [2024-11-23 23:49:01,269 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e14e5ed8-d474-4c9a-b98a-e2861b4e079a/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-23 23:49:01,273 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e14e5ed8-d474-4c9a-b98a-e2861b4e079a/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2024-11-23 23:49:01,440 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-23 23:49:01,440 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-23 23:49:01,445 INFO L256 TraceCheckSpWp]: Trace formula consists of 154 conjuncts, 8 conjuncts are in the unsatisfiable core [2024-11-23 23:49:01,447 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-23 23:49:01,605 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-11-23 23:49:01,606 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-23 23:49:01,670 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-11-23 23:49:01,673 INFO L136 FreeRefinementEngine]: Strategy FOX found an infeasible trace [2024-11-23 23:49:01,673 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [391060138] [2024-11-23 23:49:01,674 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [391060138] provided 1 perfect and 1 imperfect interpolant sequences [2024-11-23 23:49:01,674 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-11-23 23:49:01,674 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [5] total 9 [2024-11-23 23:49:01,674 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1655436320] [2024-11-23 23:49:01,674 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-23 23:49:01,674 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-11-23 23:49:01,675 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FOX [2024-11-23 23:49:01,675 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-11-23 23:49:01,675 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2024-11-23 23:49:01,687 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 39 [2024-11-23 23:49:01,687 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 49 places, 73 transitions, 284 flow. Second operand has 5 states, 5 states have (on average 13.8) internal successors, (69), 5 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-23 23:49:01,687 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-23 23:49:01,687 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 39 [2024-11-23 23:49:01,687 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-23 23:49:02,583 INFO L124 PetriNetUnfolderBase]: 2447/3776 cut-off events. [2024-11-23 23:49:02,583 INFO L125 PetriNetUnfolderBase]: For 2018/2154 co-relation queries the response was YES. [2024-11-23 23:49:02,593 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9813 conditions, 3776 events. 2447/3776 cut-off events. For 2018/2154 co-relation queries the response was YES. Maximal size of possible extension queue 173. Compared 19786 event pairs, 362 based on Foata normal form. 86/3696 useless extension candidates. Maximal degree in co-relation 5938. Up to 781 conditions per place. [2024-11-23 23:49:02,609 INFO L140 encePairwiseOnDemand]: 32/39 looper letters, 111 selfloop transitions, 23 changer transitions 0/140 dead transitions. [2024-11-23 23:49:02,610 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 55 places, 140 transitions, 761 flow [2024-11-23 23:49:02,611 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-11-23 23:49:02,611 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-11-23 23:49:02,612 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 156 transitions. [2024-11-23 23:49:02,612 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.5714285714285714 [2024-11-23 23:49:02,612 INFO L175 Difference]: Start difference. First operand has 49 places, 73 transitions, 284 flow. Second operand 7 states and 156 transitions. [2024-11-23 23:49:02,613 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 55 places, 140 transitions, 761 flow [2024-11-23 23:49:02,619 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 54 places, 140 transitions, 744 flow, removed 8 selfloop flow, removed 1 redundant places. [2024-11-23 23:49:02,621 INFO L231 Difference]: Finished difference. Result has 56 places, 86 transitions, 394 flow [2024-11-23 23:49:02,621 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=39, PETRI_DIFFERENCE_MINUEND_FLOW=275, PETRI_DIFFERENCE_MINUEND_PLACES=48, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=73, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=11, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=61, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=394, PETRI_PLACES=56, PETRI_TRANSITIONS=86} [2024-11-23 23:49:02,622 INFO L279 CegarLoopForPetriNet]: 38 programPoint places, 18 predicate places. [2024-11-23 23:49:02,622 INFO L471 AbstractCegarLoop]: Abstraction has has 56 places, 86 transitions, 394 flow [2024-11-23 23:49:02,622 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 13.8) internal successors, (69), 5 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-23 23:49:02,622 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-23 23:49:02,622 INFO L206 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] [2024-11-23 23:49:02,632 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e14e5ed8-d474-4c9a-b98a-e2861b4e079a/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2024-11-23 23:49:02,827 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e14e5ed8-d474-4c9a-b98a-e2861b4e079a/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-23 23:49:02,827 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)] === [2024-11-23 23:49:02,828 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-23 23:49:02,828 INFO L85 PathProgramCache]: Analyzing trace with hash -802042015, now seen corresponding path program 3 times [2024-11-23 23:49:02,828 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2024-11-23 23:49:02,828 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [232667285] [2024-11-23 23:49:02,829 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-23 23:49:02,829 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-23 23:49:02,829 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e14e5ed8-d474-4c9a-b98a-e2861b4e079a/bin/uautomizer-verify-LYvppIcaGC/z3 [2024-11-23 23:49:02,830 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e14e5ed8-d474-4c9a-b98a-e2861b4e079a/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-23 23:49:02,831 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e14e5ed8-d474-4c9a-b98a-e2861b4e079a/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2024-11-23 23:49:02,983 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2024-11-23 23:49:02,983 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-23 23:49:02,988 INFO L256 TraceCheckSpWp]: Trace formula consists of 154 conjuncts, 8 conjuncts are in the unsatisfiable core [2024-11-23 23:49:02,989 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-23 23:49:03,133 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-11-23 23:49:03,133 INFO L308 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-23 23:49:03,133 INFO L136 FreeRefinementEngine]: Strategy FOX found an infeasible trace [2024-11-23 23:49:03,133 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [232667285] [2024-11-23 23:49:03,133 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [232667285] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-23 23:49:03,133 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-23 23:49:03,133 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-11-23 23:49:03,133 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1465459880] [2024-11-23 23:49:03,133 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-23 23:49:03,134 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-11-23 23:49:03,134 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FOX [2024-11-23 23:49:03,134 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-11-23 23:49:03,134 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2024-11-23 23:49:03,151 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 39 [2024-11-23 23:49:03,151 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 56 places, 86 transitions, 394 flow. Second operand has 6 states, 6 states have (on average 14.0) internal successors, (84), 6 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-23 23:49:03,152 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-23 23:49:03,152 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 39 [2024-11-23 23:49:03,152 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-23 23:49:04,300 INFO L124 PetriNetUnfolderBase]: 3731/6006 cut-off events. [2024-11-23 23:49:04,300 INFO L125 PetriNetUnfolderBase]: For 7878/7972 co-relation queries the response was YES. [2024-11-23 23:49:04,322 INFO L83 FinitePrefix]: Finished finitePrefix Result has 17019 conditions, 6006 events. 3731/6006 cut-off events. For 7878/7972 co-relation queries the response was YES. Maximal size of possible extension queue 277. Compared 36229 event pairs, 1066 based on Foata normal form. 30/5710 useless extension candidates. Maximal degree in co-relation 9206. Up to 2608 conditions per place. [2024-11-23 23:49:04,351 INFO L140 encePairwiseOnDemand]: 32/39 looper letters, 115 selfloop transitions, 12 changer transitions 0/137 dead transitions. [2024-11-23 23:49:04,351 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 61 places, 137 transitions, 872 flow [2024-11-23 23:49:04,353 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-11-23 23:49:04,354 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-11-23 23:49:04,354 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 125 transitions. [2024-11-23 23:49:04,355 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.5341880341880342 [2024-11-23 23:49:04,356 INFO L175 Difference]: Start difference. First operand has 56 places, 86 transitions, 394 flow. Second operand 6 states and 125 transitions. [2024-11-23 23:49:04,356 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 61 places, 137 transitions, 872 flow [2024-11-23 23:49:04,422 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 61 places, 137 transitions, 862 flow, removed 5 selfloop flow, removed 0 redundant places. [2024-11-23 23:49:04,425 INFO L231 Difference]: Finished difference. Result has 64 places, 92 transitions, 479 flow [2024-11-23 23:49:04,425 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=39, PETRI_DIFFERENCE_MINUEND_FLOW=388, PETRI_DIFFERENCE_MINUEND_PLACES=56, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=86, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=74, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=479, PETRI_PLACES=64, PETRI_TRANSITIONS=92} [2024-11-23 23:49:04,426 INFO L279 CegarLoopForPetriNet]: 38 programPoint places, 26 predicate places. [2024-11-23 23:49:04,426 INFO L471 AbstractCegarLoop]: Abstraction has has 64 places, 92 transitions, 479 flow [2024-11-23 23:49:04,426 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 14.0) internal successors, (84), 6 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-23 23:49:04,426 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-23 23:49:04,426 INFO L206 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] [2024-11-23 23:49:04,437 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e14e5ed8-d474-4c9a-b98a-e2861b4e079a/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2024-11-23 23:49:04,627 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e14e5ed8-d474-4c9a-b98a-e2861b4e079a/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-23 23:49:04,627 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)] === [2024-11-23 23:49:04,628 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-23 23:49:04,628 INFO L85 PathProgramCache]: Analyzing trace with hash 1786981597, now seen corresponding path program 4 times [2024-11-23 23:49:04,628 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2024-11-23 23:49:04,628 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [36590038] [2024-11-23 23:49:04,628 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-11-23 23:49:04,628 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-23 23:49:04,629 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e14e5ed8-d474-4c9a-b98a-e2861b4e079a/bin/uautomizer-verify-LYvppIcaGC/z3 [2024-11-23 23:49:04,631 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e14e5ed8-d474-4c9a-b98a-e2861b4e079a/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-23 23:49:04,633 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e14e5ed8-d474-4c9a-b98a-e2861b4e079a/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2024-11-23 23:49:04,726 INFO L229 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-11-23 23:49:04,727 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-23 23:49:04,730 INFO L256 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 4 conjuncts are in the unsatisfiable core [2024-11-23 23:49:04,731 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-23 23:49:04,785 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-11-23 23:49:04,785 INFO L308 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-23 23:49:04,785 INFO L136 FreeRefinementEngine]: Strategy FOX found an infeasible trace [2024-11-23 23:49:04,785 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [36590038] [2024-11-23 23:49:04,785 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [36590038] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-23 23:49:04,786 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-23 23:49:04,786 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-11-23 23:49:04,786 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [3823673] [2024-11-23 23:49:04,786 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-23 23:49:04,786 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-11-23 23:49:04,786 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FOX [2024-11-23 23:49:04,787 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-11-23 23:49:04,787 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2024-11-23 23:49:04,809 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 39 [2024-11-23 23:49:04,809 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 64 places, 92 transitions, 479 flow. Second operand has 5 states, 5 states have (on average 14.8) internal successors, (74), 5 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-23 23:49:04,810 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-23 23:49:04,810 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 39 [2024-11-23 23:49:04,810 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-23 23:49:05,837 INFO L124 PetriNetUnfolderBase]: 4203/6774 cut-off events. [2024-11-23 23:49:05,837 INFO L125 PetriNetUnfolderBase]: For 13556/13594 co-relation queries the response was YES. [2024-11-23 23:49:05,864 INFO L83 FinitePrefix]: Finished finitePrefix Result has 20868 conditions, 6774 events. 4203/6774 cut-off events. For 13556/13594 co-relation queries the response was YES. Maximal size of possible extension queue 312. Compared 41857 event pairs, 1480 based on Foata normal form. 52/6464 useless extension candidates. Maximal degree in co-relation 12435. Up to 4189 conditions per place. [2024-11-23 23:49:05,896 INFO L140 encePairwiseOnDemand]: 33/39 looper letters, 87 selfloop transitions, 33 changer transitions 16/146 dead transitions. [2024-11-23 23:49:05,897 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 68 places, 146 transitions, 1103 flow [2024-11-23 23:49:05,898 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-11-23 23:49:05,898 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-11-23 23:49:05,899 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 110 transitions. [2024-11-23 23:49:05,899 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.5641025641025641 [2024-11-23 23:49:05,899 INFO L175 Difference]: Start difference. First operand has 64 places, 92 transitions, 479 flow. Second operand 5 states and 110 transitions. [2024-11-23 23:49:05,899 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 68 places, 146 transitions, 1103 flow [2024-11-23 23:49:05,943 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 66 places, 146 transitions, 1074 flow, removed 7 selfloop flow, removed 2 redundant places. [2024-11-23 23:49:05,946 INFO L231 Difference]: Finished difference. Result has 68 places, 108 transitions, 692 flow [2024-11-23 23:49:05,946 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=39, PETRI_DIFFERENCE_MINUEND_FLOW=466, PETRI_DIFFERENCE_MINUEND_PLACES=62, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=92, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=17, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=73, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=692, PETRI_PLACES=68, PETRI_TRANSITIONS=108} [2024-11-23 23:49:05,948 INFO L279 CegarLoopForPetriNet]: 38 programPoint places, 30 predicate places. [2024-11-23 23:49:05,948 INFO L471 AbstractCegarLoop]: Abstraction has has 68 places, 108 transitions, 692 flow [2024-11-23 23:49:05,948 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 14.8) internal successors, (74), 5 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-23 23:49:05,948 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-23 23:49:05,949 INFO L206 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] [2024-11-23 23:49:05,959 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e14e5ed8-d474-4c9a-b98a-e2861b4e079a/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2024-11-23 23:49:06,150 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e14e5ed8-d474-4c9a-b98a-e2861b4e079a/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-23 23:49:06,150 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)] === [2024-11-23 23:49:06,150 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-23 23:49:06,151 INFO L85 PathProgramCache]: Analyzing trace with hash -288638567, now seen corresponding path program 5 times [2024-11-23 23:49:06,151 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2024-11-23 23:49:06,151 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1415070158] [2024-11-23 23:49:06,151 INFO L95 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-11-23 23:49:06,151 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-23 23:49:06,151 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e14e5ed8-d474-4c9a-b98a-e2861b4e079a/bin/uautomizer-verify-LYvppIcaGC/z3 [2024-11-23 23:49:06,153 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e14e5ed8-d474-4c9a-b98a-e2861b4e079a/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-23 23:49:06,155 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e14e5ed8-d474-4c9a-b98a-e2861b4e079a/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2024-11-23 23:49:06,268 INFO L229 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-23 23:49:06,268 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-23 23:49:06,271 INFO L256 TraceCheckSpWp]: Trace formula consists of 154 conjuncts, 8 conjuncts are in the unsatisfiable core [2024-11-23 23:49:06,273 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-23 23:49:06,414 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-11-23 23:49:06,415 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-23 23:49:06,483 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-11-23 23:49:06,483 INFO L136 FreeRefinementEngine]: Strategy FOX found an infeasible trace [2024-11-23 23:49:06,483 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1415070158] [2024-11-23 23:49:06,483 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1415070158] provided 1 perfect and 1 imperfect interpolant sequences [2024-11-23 23:49:06,483 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-11-23 23:49:06,483 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [5] total 9 [2024-11-23 23:49:06,487 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [148494826] [2024-11-23 23:49:06,487 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-23 23:49:06,487 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-11-23 23:49:06,487 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FOX [2024-11-23 23:49:06,488 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-11-23 23:49:06,488 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=44, Unknown=0, NotChecked=0, Total=72 [2024-11-23 23:49:06,500 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 39 [2024-11-23 23:49:06,501 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 68 places, 108 transitions, 692 flow. Second operand has 5 states, 5 states have (on average 13.8) internal successors, (69), 5 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-23 23:49:06,501 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-23 23:49:06,501 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 39 [2024-11-23 23:49:06,501 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-23 23:49:07,418 INFO L124 PetriNetUnfolderBase]: 4513/6790 cut-off events. [2024-11-23 23:49:07,419 INFO L125 PetriNetUnfolderBase]: For 17616/17704 co-relation queries the response was YES. [2024-11-23 23:49:07,434 INFO L83 FinitePrefix]: Finished finitePrefix Result has 24955 conditions, 6790 events. 4513/6790 cut-off events. For 17616/17704 co-relation queries the response was YES. Maximal size of possible extension queue 328. Compared 38493 event pairs, 862 based on Foata normal form. 62/6532 useless extension candidates. Maximal degree in co-relation 17428. Up to 2954 conditions per place. [2024-11-23 23:49:07,463 INFO L140 encePairwiseOnDemand]: 32/39 looper letters, 128 selfloop transitions, 28 changer transitions 0/162 dead transitions. [2024-11-23 23:49:07,463 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 71 places, 162 transitions, 1285 flow [2024-11-23 23:49:07,465 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-11-23 23:49:07,465 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-11-23 23:49:07,465 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 117 transitions. [2024-11-23 23:49:07,466 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.6 [2024-11-23 23:49:07,466 INFO L175 Difference]: Start difference. First operand has 68 places, 108 transitions, 692 flow. Second operand 5 states and 117 transitions. [2024-11-23 23:49:07,466 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 71 places, 162 transitions, 1285 flow [2024-11-23 23:49:07,589 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 70 places, 162 transitions, 1247 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-11-23 23:49:07,591 INFO L231 Difference]: Finished difference. Result has 73 places, 120 transitions, 883 flow [2024-11-23 23:49:07,592 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=39, PETRI_DIFFERENCE_MINUEND_FLOW=661, PETRI_DIFFERENCE_MINUEND_PLACES=66, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=108, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=17, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=84, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=883, PETRI_PLACES=73, PETRI_TRANSITIONS=120} [2024-11-23 23:49:07,592 INFO L279 CegarLoopForPetriNet]: 38 programPoint places, 35 predicate places. [2024-11-23 23:49:07,593 INFO L471 AbstractCegarLoop]: Abstraction has has 73 places, 120 transitions, 883 flow [2024-11-23 23:49:07,593 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 13.8) internal successors, (69), 5 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-23 23:49:07,593 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-23 23:49:07,593 INFO L206 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] [2024-11-23 23:49:07,604 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e14e5ed8-d474-4c9a-b98a-e2861b4e079a/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Ended with exit code 0 [2024-11-23 23:49:07,793 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e14e5ed8-d474-4c9a-b98a-e2861b4e079a/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-23 23:49:07,794 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)] === [2024-11-23 23:49:07,794 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-23 23:49:07,795 INFO L85 PathProgramCache]: Analyzing trace with hash 1583686711, now seen corresponding path program 6 times [2024-11-23 23:49:07,795 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2024-11-23 23:49:07,796 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [513392398] [2024-11-23 23:49:07,796 INFO L95 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2024-11-23 23:49:07,796 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-23 23:49:07,796 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e14e5ed8-d474-4c9a-b98a-e2861b4e079a/bin/uautomizer-verify-LYvppIcaGC/z3 [2024-11-23 23:49:07,798 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e14e5ed8-d474-4c9a-b98a-e2861b4e079a/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-23 23:49:07,802 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e14e5ed8-d474-4c9a-b98a-e2861b4e079a/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2024-11-23 23:49:07,952 INFO L229 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2024-11-23 23:49:07,952 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-23 23:49:07,957 INFO L256 TraceCheckSpWp]: Trace formula consists of 154 conjuncts, 8 conjuncts are in the unsatisfiable core [2024-11-23 23:49:07,959 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-23 23:49:08,158 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-11-23 23:49:08,163 INFO L308 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-23 23:49:08,163 INFO L136 FreeRefinementEngine]: Strategy FOX found an infeasible trace [2024-11-23 23:49:08,163 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [513392398] [2024-11-23 23:49:08,163 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [513392398] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-23 23:49:08,163 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-23 23:49:08,163 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-11-23 23:49:08,163 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [625052605] [2024-11-23 23:49:08,163 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-23 23:49:08,164 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-11-23 23:49:08,164 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FOX [2024-11-23 23:49:08,164 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-11-23 23:49:08,164 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2024-11-23 23:49:08,195 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 39 [2024-11-23 23:49:08,195 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 73 places, 120 transitions, 883 flow. Second operand has 6 states, 6 states have (on average 14.0) internal successors, (84), 6 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-23 23:49:08,196 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-23 23:49:08,196 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 39 [2024-11-23 23:49:08,196 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-23 23:49:09,377 INFO L124 PetriNetUnfolderBase]: 5355/8916 cut-off events. [2024-11-23 23:49:09,377 INFO L125 PetriNetUnfolderBase]: For 28668/28818 co-relation queries the response was YES. [2024-11-23 23:49:09,395 INFO L83 FinitePrefix]: Finished finitePrefix Result has 31240 conditions, 8916 events. 5355/8916 cut-off events. For 28668/28818 co-relation queries the response was YES. Maximal size of possible extension queue 396. Compared 61672 event pairs, 1472 based on Foata normal form. 124/8428 useless extension candidates. Maximal degree in co-relation 20816. Up to 4092 conditions per place. [2024-11-23 23:49:09,429 INFO L140 encePairwiseOnDemand]: 32/39 looper letters, 135 selfloop transitions, 28 changer transitions 15/193 dead transitions. [2024-11-23 23:49:09,429 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 78 places, 193 transitions, 1907 flow [2024-11-23 23:49:09,430 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-11-23 23:49:09,431 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-11-23 23:49:09,431 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 120 transitions. [2024-11-23 23:49:09,431 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.5128205128205128 [2024-11-23 23:49:09,431 INFO L175 Difference]: Start difference. First operand has 73 places, 120 transitions, 883 flow. Second operand 6 states and 120 transitions. [2024-11-23 23:49:09,431 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 78 places, 193 transitions, 1907 flow [2024-11-23 23:49:09,505 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 78 places, 193 transitions, 1887 flow, removed 10 selfloop flow, removed 0 redundant places. [2024-11-23 23:49:09,508 INFO L231 Difference]: Finished difference. Result has 81 places, 144 transitions, 1306 flow [2024-11-23 23:49:09,508 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=39, PETRI_DIFFERENCE_MINUEND_FLOW=871, PETRI_DIFFERENCE_MINUEND_PLACES=73, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=120, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=93, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=1306, PETRI_PLACES=81, PETRI_TRANSITIONS=144} [2024-11-23 23:49:09,509 INFO L279 CegarLoopForPetriNet]: 38 programPoint places, 43 predicate places. [2024-11-23 23:49:09,509 INFO L471 AbstractCegarLoop]: Abstraction has has 81 places, 144 transitions, 1306 flow [2024-11-23 23:49:09,510 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 14.0) internal successors, (84), 6 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-23 23:49:09,510 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-23 23:49:09,510 INFO L206 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] [2024-11-23 23:49:09,522 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e14e5ed8-d474-4c9a-b98a-e2861b4e079a/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Ended with exit code 0 [2024-11-23 23:49:09,710 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e14e5ed8-d474-4c9a-b98a-e2861b4e079a/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-23 23:49:09,710 INFO L396 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-11-23 23:49:09,711 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-23 23:49:09,711 INFO L85 PathProgramCache]: Analyzing trace with hash -673986951, now seen corresponding path program 7 times [2024-11-23 23:49:09,711 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2024-11-23 23:49:09,712 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1670447222] [2024-11-23 23:49:09,712 INFO L95 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-11-23 23:49:09,712 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-23 23:49:09,712 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e14e5ed8-d474-4c9a-b98a-e2861b4e079a/bin/uautomizer-verify-LYvppIcaGC/z3 [2024-11-23 23:49:09,713 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e14e5ed8-d474-4c9a-b98a-e2861b4e079a/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-23 23:49:09,715 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e14e5ed8-d474-4c9a-b98a-e2861b4e079a/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2024-11-23 23:49:09,825 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-23 23:49:09,831 INFO L256 TraceCheckSpWp]: Trace formula consists of 154 conjuncts, 8 conjuncts are in the unsatisfiable core [2024-11-23 23:49:09,833 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-23 23:49:09,983 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-11-23 23:49:09,984 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-23 23:49:10,072 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-11-23 23:49:10,072 INFO L136 FreeRefinementEngine]: Strategy FOX found an infeasible trace [2024-11-23 23:49:10,072 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1670447222] [2024-11-23 23:49:10,073 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1670447222] provided 1 perfect and 1 imperfect interpolant sequences [2024-11-23 23:49:10,073 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-11-23 23:49:10,073 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [5] total 9 [2024-11-23 23:49:10,073 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2099330593] [2024-11-23 23:49:10,073 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-23 23:49:10,073 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-11-23 23:49:10,075 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FOX [2024-11-23 23:49:10,075 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-11-23 23:49:10,075 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2024-11-23 23:49:10,096 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 39 [2024-11-23 23:49:10,096 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 81 places, 144 transitions, 1306 flow. Second operand has 5 states, 5 states have (on average 13.8) internal successors, (69), 5 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-23 23:49:10,096 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-23 23:49:10,096 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 39 [2024-11-23 23:49:10,096 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-23 23:49:11,156 INFO L124 PetriNetUnfolderBase]: 5617/8776 cut-off events. [2024-11-23 23:49:11,156 INFO L125 PetriNetUnfolderBase]: For 38694/38744 co-relation queries the response was YES. [2024-11-23 23:49:11,181 INFO L83 FinitePrefix]: Finished finitePrefix Result has 36209 conditions, 8776 events. 5617/8776 cut-off events. For 38694/38744 co-relation queries the response was YES. Maximal size of possible extension queue 334. Compared 53872 event pairs, 880 based on Foata normal form. 78/8410 useless extension candidates. Maximal degree in co-relation 31645. Up to 2327 conditions per place. [2024-11-23 23:49:11,218 INFO L140 encePairwiseOnDemand]: 32/39 looper letters, 137 selfloop transitions, 61 changer transitions 3/207 dead transitions. [2024-11-23 23:49:11,218 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 86 places, 207 transitions, 2070 flow [2024-11-23 23:49:11,219 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-11-23 23:49:11,220 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-11-23 23:49:11,220 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 130 transitions. [2024-11-23 23:49:11,220 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.5555555555555556 [2024-11-23 23:49:11,220 INFO L175 Difference]: Start difference. First operand has 81 places, 144 transitions, 1306 flow. Second operand 6 states and 130 transitions. [2024-11-23 23:49:11,221 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 86 places, 207 transitions, 2070 flow [2024-11-23 23:49:11,492 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 85 places, 207 transitions, 2057 flow, removed 6 selfloop flow, removed 1 redundant places. [2024-11-23 23:49:11,496 INFO L231 Difference]: Finished difference. Result has 90 places, 153 transitions, 1631 flow [2024-11-23 23:49:11,496 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=39, PETRI_DIFFERENCE_MINUEND_FLOW=1301, PETRI_DIFFERENCE_MINUEND_PLACES=80, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=144, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=51, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=90, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=1631, PETRI_PLACES=90, PETRI_TRANSITIONS=153} [2024-11-23 23:49:11,497 INFO L279 CegarLoopForPetriNet]: 38 programPoint places, 52 predicate places. [2024-11-23 23:49:11,498 INFO L471 AbstractCegarLoop]: Abstraction has has 90 places, 153 transitions, 1631 flow [2024-11-23 23:49:11,498 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 13.8) internal successors, (69), 5 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-23 23:49:11,498 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-23 23:49:11,498 INFO L206 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] [2024-11-23 23:49:11,509 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e14e5ed8-d474-4c9a-b98a-e2861b4e079a/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2024-11-23 23:49:11,699 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e14e5ed8-d474-4c9a-b98a-e2861b4e079a/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-23 23:49:11,699 INFO L396 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-11-23 23:49:11,699 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-23 23:49:11,699 INFO L85 PathProgramCache]: Analyzing trace with hash -1381151881, now seen corresponding path program 8 times [2024-11-23 23:49:11,700 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2024-11-23 23:49:11,700 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1419009627] [2024-11-23 23:49:11,700 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-23 23:49:11,700 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-23 23:49:11,700 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e14e5ed8-d474-4c9a-b98a-e2861b4e079a/bin/uautomizer-verify-LYvppIcaGC/z3 [2024-11-23 23:49:11,704 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e14e5ed8-d474-4c9a-b98a-e2861b4e079a/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-23 23:49:11,707 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e14e5ed8-d474-4c9a-b98a-e2861b4e079a/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2024-11-23 23:49:11,835 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-23 23:49:11,836 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-23 23:49:11,839 INFO L256 TraceCheckSpWp]: Trace formula consists of 154 conjuncts, 8 conjuncts are in the unsatisfiable core [2024-11-23 23:49:11,841 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-23 23:49:11,982 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-11-23 23:49:11,983 INFO L308 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-23 23:49:11,983 INFO L136 FreeRefinementEngine]: Strategy FOX found an infeasible trace [2024-11-23 23:49:11,984 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1419009627] [2024-11-23 23:49:11,984 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1419009627] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-23 23:49:11,984 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-23 23:49:11,984 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-11-23 23:49:11,984 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [309714621] [2024-11-23 23:49:11,984 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-23 23:49:11,985 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-11-23 23:49:11,985 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FOX [2024-11-23 23:49:11,985 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-11-23 23:49:11,985 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2024-11-23 23:49:12,002 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 39 [2024-11-23 23:49:12,002 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 90 places, 153 transitions, 1631 flow. Second operand has 6 states, 6 states have (on average 14.0) internal successors, (84), 6 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-23 23:49:12,002 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-23 23:49:12,003 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 39 [2024-11-23 23:49:12,003 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-23 23:49:13,191 INFO L124 PetriNetUnfolderBase]: 4951/8002 cut-off events. [2024-11-23 23:49:13,191 INFO L125 PetriNetUnfolderBase]: For 53088/53170 co-relation queries the response was YES. [2024-11-23 23:49:13,221 INFO L83 FinitePrefix]: Finished finitePrefix Result has 36729 conditions, 8002 events. 4951/8002 cut-off events. For 53088/53170 co-relation queries the response was YES. Maximal size of possible extension queue 316. Compared 50802 event pairs, 1394 based on Foata normal form. 68/7590 useless extension candidates. Maximal degree in co-relation 33241. Up to 3948 conditions per place. [2024-11-23 23:49:13,255 INFO L140 encePairwiseOnDemand]: 32/39 looper letters, 149 selfloop transitions, 38 changer transitions 0/206 dead transitions. [2024-11-23 23:49:13,255 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 94 places, 206 transitions, 2434 flow [2024-11-23 23:49:13,256 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-11-23 23:49:13,256 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-11-23 23:49:13,256 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 123 transitions. [2024-11-23 23:49:13,257 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.5256410256410257 [2024-11-23 23:49:13,257 INFO L175 Difference]: Start difference. First operand has 90 places, 153 transitions, 1631 flow. Second operand 6 states and 123 transitions. [2024-11-23 23:49:13,257 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 94 places, 206 transitions, 2434 flow [2024-11-23 23:49:13,406 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 93 places, 206 transitions, 2402 flow, removed 16 selfloop flow, removed 1 redundant places. [2024-11-23 23:49:13,409 INFO L231 Difference]: Finished difference. Result has 95 places, 168 transitions, 1987 flow [2024-11-23 23:49:13,409 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=39, PETRI_DIFFERENCE_MINUEND_FLOW=1605, PETRI_DIFFERENCE_MINUEND_PLACES=88, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=153, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=23, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=119, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=1987, PETRI_PLACES=95, PETRI_TRANSITIONS=168} [2024-11-23 23:49:13,410 INFO L279 CegarLoopForPetriNet]: 38 programPoint places, 57 predicate places. [2024-11-23 23:49:13,410 INFO L471 AbstractCegarLoop]: Abstraction has has 95 places, 168 transitions, 1987 flow [2024-11-23 23:49:13,410 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 14.0) internal successors, (84), 6 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-23 23:49:13,410 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-23 23:49:13,410 INFO L206 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] [2024-11-23 23:49:13,417 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e14e5ed8-d474-4c9a-b98a-e2861b4e079a/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Ended with exit code 0 [2024-11-23 23:49:13,611 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e14e5ed8-d474-4c9a-b98a-e2861b4e079a/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-23 23:49:13,611 INFO L396 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-11-23 23:49:13,611 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-23 23:49:13,611 INFO L85 PathProgramCache]: Analyzing trace with hash -940073336, now seen corresponding path program 1 times [2024-11-23 23:49:13,612 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2024-11-23 23:49:13,612 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1716599524] [2024-11-23 23:49:13,612 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-23 23:49:13,612 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-23 23:49:13,612 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e14e5ed8-d474-4c9a-b98a-e2861b4e079a/bin/uautomizer-verify-LYvppIcaGC/z3 [2024-11-23 23:49:13,613 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e14e5ed8-d474-4c9a-b98a-e2861b4e079a/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-23 23:49:13,615 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e14e5ed8-d474-4c9a-b98a-e2861b4e079a/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2024-11-23 23:49:13,744 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-23 23:49:13,752 INFO L256 TraceCheckSpWp]: Trace formula consists of 163 conjuncts, 8 conjuncts are in the unsatisfiable core [2024-11-23 23:49:13,754 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-23 23:49:13,924 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-11-23 23:49:13,924 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-23 23:49:13,996 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-11-23 23:49:13,996 INFO L136 FreeRefinementEngine]: Strategy FOX found an infeasible trace [2024-11-23 23:49:13,997 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1716599524] [2024-11-23 23:49:13,997 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1716599524] provided 1 perfect and 1 imperfect interpolant sequences [2024-11-23 23:49:13,997 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-11-23 23:49:13,997 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [5] total 9 [2024-11-23 23:49:13,997 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1145608170] [2024-11-23 23:49:13,997 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-23 23:49:13,998 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-11-23 23:49:13,998 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FOX [2024-11-23 23:49:13,998 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-11-23 23:49:13,998 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2024-11-23 23:49:14,012 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 39 [2024-11-23 23:49:14,012 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 95 places, 168 transitions, 1987 flow. Second operand has 5 states, 5 states have (on average 13.4) internal successors, (67), 5 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-23 23:49:14,012 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-23 23:49:14,012 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 39 [2024-11-23 23:49:14,012 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-23 23:49:15,622 INFO L124 PetriNetUnfolderBase]: 7669/12840 cut-off events. [2024-11-23 23:49:15,622 INFO L125 PetriNetUnfolderBase]: For 88126/88126 co-relation queries the response was YES. [2024-11-23 23:49:15,658 INFO L83 FinitePrefix]: Finished finitePrefix Result has 56572 conditions, 12840 events. 7669/12840 cut-off events. For 88126/88126 co-relation queries the response was YES. Maximal size of possible extension queue 470. Compared 89582 event pairs, 364 based on Foata normal form. 468/12678 useless extension candidates. Maximal degree in co-relation 51394. Up to 3644 conditions per place. [2024-11-23 23:49:15,694 INFO L140 encePairwiseOnDemand]: 32/39 looper letters, 276 selfloop transitions, 49 changer transitions 0/330 dead transitions. [2024-11-23 23:49:15,694 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 101 places, 330 transitions, 4666 flow [2024-11-23 23:49:15,695 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-11-23 23:49:15,695 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-11-23 23:49:15,696 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 145 transitions. [2024-11-23 23:49:15,696 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.5311355311355311 [2024-11-23 23:49:15,696 INFO L175 Difference]: Start difference. First operand has 95 places, 168 transitions, 1987 flow. Second operand 7 states and 145 transitions. [2024-11-23 23:49:15,696 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 101 places, 330 transitions, 4666 flow [2024-11-23 23:49:15,932 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 97 places, 330 transitions, 4536 flow, removed 33 selfloop flow, removed 4 redundant places. [2024-11-23 23:49:15,937 INFO L231 Difference]: Finished difference. Result has 103 places, 197 transitions, 2409 flow [2024-11-23 23:49:15,937 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=39, PETRI_DIFFERENCE_MINUEND_FLOW=1918, PETRI_DIFFERENCE_MINUEND_PLACES=91, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=168, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=20, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=145, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=2409, PETRI_PLACES=103, PETRI_TRANSITIONS=197} [2024-11-23 23:49:15,938 INFO L279 CegarLoopForPetriNet]: 38 programPoint places, 65 predicate places. [2024-11-23 23:49:15,938 INFO L471 AbstractCegarLoop]: Abstraction has has 103 places, 197 transitions, 2409 flow [2024-11-23 23:49:15,938 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 13.4) internal successors, (67), 5 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-23 23:49:15,938 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-23 23:49:15,938 INFO L206 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] [2024-11-23 23:49:15,949 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e14e5ed8-d474-4c9a-b98a-e2861b4e079a/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Ended with exit code 0 [2024-11-23 23:49:16,142 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e14e5ed8-d474-4c9a-b98a-e2861b4e079a/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-23 23:49:16,142 INFO L396 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-11-23 23:49:16,142 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-23 23:49:16,143 INFO L85 PathProgramCache]: Analyzing trace with hash 1826631798, now seen corresponding path program 2 times [2024-11-23 23:49:16,143 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2024-11-23 23:49:16,143 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2020882920] [2024-11-23 23:49:16,143 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-23 23:49:16,143 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-23 23:49:16,143 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e14e5ed8-d474-4c9a-b98a-e2861b4e079a/bin/uautomizer-verify-LYvppIcaGC/z3 [2024-11-23 23:49:16,145 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e14e5ed8-d474-4c9a-b98a-e2861b4e079a/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-23 23:49:16,146 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e14e5ed8-d474-4c9a-b98a-e2861b4e079a/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2024-11-23 23:49:16,274 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-23 23:49:16,274 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-23 23:49:16,278 INFO L256 TraceCheckSpWp]: Trace formula consists of 163 conjuncts, 8 conjuncts are in the unsatisfiable core [2024-11-23 23:49:16,279 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-23 23:49:16,406 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-11-23 23:49:16,406 INFO L308 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-23 23:49:16,406 INFO L136 FreeRefinementEngine]: Strategy FOX found an infeasible trace [2024-11-23 23:49:16,406 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2020882920] [2024-11-23 23:49:16,406 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2020882920] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-23 23:49:16,406 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-23 23:49:16,407 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-11-23 23:49:16,407 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [158662726] [2024-11-23 23:49:16,407 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-23 23:49:16,407 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-11-23 23:49:16,407 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FOX [2024-11-23 23:49:16,407 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-11-23 23:49:16,407 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2024-11-23 23:49:16,425 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 39 [2024-11-23 23:49:16,426 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 103 places, 197 transitions, 2409 flow. Second operand has 6 states, 6 states have (on average 13.5) internal successors, (81), 6 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-23 23:49:16,426 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-23 23:49:16,426 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 39 [2024-11-23 23:49:16,426 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-23 23:49:17,890 INFO L124 PetriNetUnfolderBase]: 6467/10740 cut-off events. [2024-11-23 23:49:17,890 INFO L125 PetriNetUnfolderBase]: For 92626/92850 co-relation queries the response was YES. [2024-11-23 23:49:17,934 INFO L83 FinitePrefix]: Finished finitePrefix Result has 55427 conditions, 10740 events. 6467/10740 cut-off events. For 92626/92850 co-relation queries the response was YES. Maximal size of possible extension queue 450. Compared 74699 event pairs, 1482 based on Foata normal form. 108/10190 useless extension candidates. Maximal degree in co-relation 44167. Up to 4816 conditions per place. [2024-11-23 23:49:17,967 INFO L140 encePairwiseOnDemand]: 32/39 looper letters, 270 selfloop transitions, 15 changer transitions 29/323 dead transitions. [2024-11-23 23:49:17,967 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 108 places, 323 transitions, 4820 flow [2024-11-23 23:49:17,968 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-11-23 23:49:17,968 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-11-23 23:49:17,968 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 117 transitions. [2024-11-23 23:49:17,969 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.5 [2024-11-23 23:49:17,969 INFO L175 Difference]: Start difference. First operand has 103 places, 197 transitions, 2409 flow. Second operand 6 states and 117 transitions. [2024-11-23 23:49:17,969 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 108 places, 323 transitions, 4820 flow [2024-11-23 23:49:18,223 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 108 places, 323 transitions, 4820 flow, removed 0 selfloop flow, removed 0 redundant places. [2024-11-23 23:49:18,226 INFO L231 Difference]: Finished difference. Result has 111 places, 198 transitions, 2500 flow [2024-11-23 23:49:18,227 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=39, PETRI_DIFFERENCE_MINUEND_FLOW=2409, PETRI_DIFFERENCE_MINUEND_PLACES=103, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=197, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=14, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=182, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=2500, PETRI_PLACES=111, PETRI_TRANSITIONS=198} [2024-11-23 23:49:18,227 INFO L279 CegarLoopForPetriNet]: 38 programPoint places, 73 predicate places. [2024-11-23 23:49:18,227 INFO L471 AbstractCegarLoop]: Abstraction has has 111 places, 198 transitions, 2500 flow [2024-11-23 23:49:18,227 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 13.5) internal successors, (81), 6 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-23 23:49:18,227 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-23 23:49:18,228 INFO L206 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] [2024-11-23 23:49:18,235 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e14e5ed8-d474-4c9a-b98a-e2861b4e079a/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Ended with exit code 0 [2024-11-23 23:49:18,428 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e14e5ed8-d474-4c9a-b98a-e2861b4e079a/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-23 23:49:18,428 INFO L396 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-11-23 23:49:18,428 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-23 23:49:18,429 INFO L85 PathProgramCache]: Analyzing trace with hash 193523562, now seen corresponding path program 3 times [2024-11-23 23:49:18,429 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2024-11-23 23:49:18,429 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [151138629] [2024-11-23 23:49:18,429 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-23 23:49:18,429 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-23 23:49:18,429 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e14e5ed8-d474-4c9a-b98a-e2861b4e079a/bin/uautomizer-verify-LYvppIcaGC/z3 [2024-11-23 23:49:18,433 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e14e5ed8-d474-4c9a-b98a-e2861b4e079a/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-23 23:49:18,437 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e14e5ed8-d474-4c9a-b98a-e2861b4e079a/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2024-11-23 23:49:18,554 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2024-11-23 23:49:18,554 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-23 23:49:18,557 INFO L256 TraceCheckSpWp]: Trace formula consists of 163 conjuncts, 8 conjuncts are in the unsatisfiable core [2024-11-23 23:49:18,559 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-23 23:49:18,725 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-11-23 23:49:18,725 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-23 23:49:18,787 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-11-23 23:49:18,788 INFO L136 FreeRefinementEngine]: Strategy FOX found an infeasible trace [2024-11-23 23:49:18,788 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [151138629] [2024-11-23 23:49:18,788 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [151138629] provided 1 perfect and 1 imperfect interpolant sequences [2024-11-23 23:49:18,788 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-11-23 23:49:18,788 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [5] total 9 [2024-11-23 23:49:18,788 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [710365066] [2024-11-23 23:49:18,788 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-23 23:49:18,788 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-11-23 23:49:18,788 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FOX [2024-11-23 23:49:18,789 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-11-23 23:49:18,789 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2024-11-23 23:49:18,801 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 39 [2024-11-23 23:49:18,802 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 111 places, 198 transitions, 2500 flow. Second operand has 5 states, 5 states have (on average 13.4) internal successors, (67), 5 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-23 23:49:18,802 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-23 23:49:18,802 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 39 [2024-11-23 23:49:18,802 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-23 23:49:20,510 INFO L124 PetriNetUnfolderBase]: 8551/14362 cut-off events. [2024-11-23 23:49:20,510 INFO L125 PetriNetUnfolderBase]: For 138944/139024 co-relation queries the response was YES. [2024-11-23 23:49:20,563 INFO L83 FinitePrefix]: Finished finitePrefix Result has 73880 conditions, 14362 events. 8551/14362 cut-off events. For 138944/139024 co-relation queries the response was YES. Maximal size of possible extension queue 552. Compared 101570 event pairs, 1184 based on Foata normal form. 188/13916 useless extension candidates. Maximal degree in co-relation 59448. Up to 3390 conditions per place. [2024-11-23 23:49:20,606 INFO L140 encePairwiseOnDemand]: 31/39 looper letters, 274 selfloop transitions, 68 changer transitions 0/347 dead transitions. [2024-11-23 23:49:20,607 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 115 places, 347 transitions, 5202 flow [2024-11-23 23:49:20,608 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-11-23 23:49:20,608 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-11-23 23:49:20,609 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 131 transitions. [2024-11-23 23:49:20,609 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.5598290598290598 [2024-11-23 23:49:20,609 INFO L175 Difference]: Start difference. First operand has 111 places, 198 transitions, 2500 flow. Second operand 6 states and 131 transitions. [2024-11-23 23:49:20,609 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 115 places, 347 transitions, 5202 flow [2024-11-23 23:49:20,967 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 112 places, 347 transitions, 5132 flow, removed 24 selfloop flow, removed 3 redundant places. [2024-11-23 23:49:20,971 INFO L231 Difference]: Finished difference. Result has 117 places, 233 transitions, 3255 flow [2024-11-23 23:49:20,971 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=39, PETRI_DIFFERENCE_MINUEND_FLOW=2461, PETRI_DIFFERENCE_MINUEND_PLACES=107, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=198, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=33, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=150, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=3255, PETRI_PLACES=117, PETRI_TRANSITIONS=233} [2024-11-23 23:49:20,971 INFO L279 CegarLoopForPetriNet]: 38 programPoint places, 79 predicate places. [2024-11-23 23:49:20,972 INFO L471 AbstractCegarLoop]: Abstraction has has 117 places, 233 transitions, 3255 flow [2024-11-23 23:49:20,972 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 13.4) internal successors, (67), 5 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-23 23:49:20,972 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-23 23:49:20,972 INFO L206 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] [2024-11-23 23:49:20,981 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e14e5ed8-d474-4c9a-b98a-e2861b4e079a/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Ended with exit code 0 [2024-11-23 23:49:21,172 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e14e5ed8-d474-4c9a-b98a-e2861b4e079a/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-23 23:49:21,172 INFO L396 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-11-23 23:49:21,173 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-23 23:49:21,173 INFO L85 PathProgramCache]: Analyzing trace with hash -1434674718, now seen corresponding path program 4 times [2024-11-23 23:49:21,173 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2024-11-23 23:49:21,173 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [193011126] [2024-11-23 23:49:21,173 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-11-23 23:49:21,173 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-23 23:49:21,174 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e14e5ed8-d474-4c9a-b98a-e2861b4e079a/bin/uautomizer-verify-LYvppIcaGC/z3 [2024-11-23 23:49:21,176 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e14e5ed8-d474-4c9a-b98a-e2861b4e079a/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-23 23:49:21,182 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e14e5ed8-d474-4c9a-b98a-e2861b4e079a/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2024-11-23 23:49:21,283 INFO L229 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-11-23 23:49:21,283 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-23 23:49:21,286 INFO L256 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 4 conjuncts are in the unsatisfiable core [2024-11-23 23:49:21,287 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-23 23:49:21,347 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-11-23 23:49:21,347 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-23 23:49:21,397 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-11-23 23:49:21,398 INFO L136 FreeRefinementEngine]: Strategy FOX found an infeasible trace [2024-11-23 23:49:21,398 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [193011126] [2024-11-23 23:49:21,398 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [193011126] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-23 23:49:21,398 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-11-23 23:49:21,398 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 7 [2024-11-23 23:49:21,398 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1980830862] [2024-11-23 23:49:21,398 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-11-23 23:49:21,398 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-11-23 23:49:21,399 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FOX [2024-11-23 23:49:21,399 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-11-23 23:49:21,399 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2024-11-23 23:49:21,423 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 39 [2024-11-23 23:49:21,423 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 117 places, 233 transitions, 3255 flow. Second operand has 7 states, 7 states have (on average 14.142857142857142) internal successors, (99), 7 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-23 23:49:21,423 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-23 23:49:21,423 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 39 [2024-11-23 23:49:21,423 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-23 23:49:24,130 INFO L124 PetriNetUnfolderBase]: 8917/15132 cut-off events. [2024-11-23 23:49:24,130 INFO L125 PetriNetUnfolderBase]: For 164480/164686 co-relation queries the response was YES. [2024-11-23 23:49:24,202 INFO L83 FinitePrefix]: Finished finitePrefix Result has 82324 conditions, 15132 events. 8917/15132 cut-off events. For 164480/164686 co-relation queries the response was YES. Maximal size of possible extension queue 691. Compared 112466 event pairs, 606 based on Foata normal form. 224/14674 useless extension candidates. Maximal degree in co-relation 63963. Up to 3009 conditions per place. [2024-11-23 23:49:24,255 INFO L140 encePairwiseOnDemand]: 32/39 looper letters, 203 selfloop transitions, 221 changer transitions 0/460 dead transitions. [2024-11-23 23:49:24,255 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 127 places, 460 transitions, 6852 flow [2024-11-23 23:49:24,256 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-11-23 23:49:24,256 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-11-23 23:49:24,256 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 231 transitions. [2024-11-23 23:49:24,256 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.5384615384615384 [2024-11-23 23:49:24,256 INFO L175 Difference]: Start difference. First operand has 117 places, 233 transitions, 3255 flow. Second operand 11 states and 231 transitions. [2024-11-23 23:49:24,257 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 127 places, 460 transitions, 6852 flow [2024-11-23 23:49:24,773 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 127 places, 460 transitions, 6816 flow, removed 18 selfloop flow, removed 0 redundant places. [2024-11-23 23:49:24,781 INFO L231 Difference]: Finished difference. Result has 129 places, 370 transitions, 5727 flow [2024-11-23 23:49:24,781 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=39, PETRI_DIFFERENCE_MINUEND_FLOW=3249, PETRI_DIFFERENCE_MINUEND_PLACES=117, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=233, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=104, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=129, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=5727, PETRI_PLACES=129, PETRI_TRANSITIONS=370} [2024-11-23 23:49:24,782 INFO L279 CegarLoopForPetriNet]: 38 programPoint places, 91 predicate places. [2024-11-23 23:49:24,782 INFO L471 AbstractCegarLoop]: Abstraction has has 129 places, 370 transitions, 5727 flow [2024-11-23 23:49:24,782 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 14.142857142857142) internal successors, (99), 7 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-23 23:49:24,782 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-23 23:49:24,782 INFO L206 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] [2024-11-23 23:49:24,790 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e14e5ed8-d474-4c9a-b98a-e2861b4e079a/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Ended with exit code 0 [2024-11-23 23:49:24,982 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e14e5ed8-d474-4c9a-b98a-e2861b4e079a/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-23 23:49:24,983 INFO L396 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-11-23 23:49:24,983 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-23 23:49:24,983 INFO L85 PathProgramCache]: Analyzing trace with hash 1711112976, now seen corresponding path program 5 times [2024-11-23 23:49:24,983 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2024-11-23 23:49:24,983 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1727483612] [2024-11-23 23:49:24,983 INFO L95 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-11-23 23:49:24,983 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-23 23:49:24,984 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e14e5ed8-d474-4c9a-b98a-e2861b4e079a/bin/uautomizer-verify-LYvppIcaGC/z3 [2024-11-23 23:49:24,985 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e14e5ed8-d474-4c9a-b98a-e2861b4e079a/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-23 23:49:24,986 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e14e5ed8-d474-4c9a-b98a-e2861b4e079a/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2024-11-23 23:49:25,125 INFO L229 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-23 23:49:25,126 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-23 23:49:25,129 INFO L256 TraceCheckSpWp]: Trace formula consists of 163 conjuncts, 8 conjuncts are in the unsatisfiable core [2024-11-23 23:49:25,131 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-23 23:49:25,261 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-11-23 23:49:25,262 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-23 23:49:25,320 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-11-23 23:49:25,320 INFO L136 FreeRefinementEngine]: Strategy FOX found an infeasible trace [2024-11-23 23:49:25,320 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1727483612] [2024-11-23 23:49:25,320 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1727483612] provided 1 perfect and 1 imperfect interpolant sequences [2024-11-23 23:49:25,320 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-11-23 23:49:25,320 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [5] total 9 [2024-11-23 23:49:25,320 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1676051096] [2024-11-23 23:49:25,320 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-23 23:49:25,321 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-11-23 23:49:25,321 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FOX [2024-11-23 23:49:25,321 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-11-23 23:49:25,321 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=44, Unknown=0, NotChecked=0, Total=72 [2024-11-23 23:49:25,339 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 39 [2024-11-23 23:49:25,339 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 129 places, 370 transitions, 5727 flow. Second operand has 5 states, 5 states have (on average 13.4) internal successors, (67), 5 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-23 23:49:25,339 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-23 23:49:25,339 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 39 [2024-11-23 23:49:25,339 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-23 23:49:27,372 INFO L124 PetriNetUnfolderBase]: 9581/15800 cut-off events. [2024-11-23 23:49:27,372 INFO L125 PetriNetUnfolderBase]: For 206020/206300 co-relation queries the response was YES. [2024-11-23 23:49:27,448 INFO L83 FinitePrefix]: Finished finitePrefix Result has 92843 conditions, 15800 events. 9581/15800 cut-off events. For 206020/206300 co-relation queries the response was YES. Maximal size of possible extension queue 629. Compared 111658 event pairs, 1212 based on Foata normal form. 160/15204 useless extension candidates. Maximal degree in co-relation 77507. Up to 7126 conditions per place. [2024-11-23 23:49:27,501 INFO L140 encePairwiseOnDemand]: 32/39 looper letters, 350 selfloop transitions, 128 changer transitions 0/483 dead transitions. [2024-11-23 23:49:27,502 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 133 places, 483 transitions, 8239 flow [2024-11-23 23:49:27,503 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-11-23 23:49:27,503 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-11-23 23:49:27,503 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 109 transitions. [2024-11-23 23:49:27,503 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.558974358974359 [2024-11-23 23:49:27,503 INFO L175 Difference]: Start difference. First operand has 129 places, 370 transitions, 5727 flow. Second operand 5 states and 109 transitions. [2024-11-23 23:49:27,503 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 133 places, 483 transitions, 8239 flow [2024-11-23 23:49:28,430 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 132 places, 483 transitions, 8037 flow, removed 45 selfloop flow, removed 1 redundant places. [2024-11-23 23:49:28,435 INFO L231 Difference]: Finished difference. Result has 136 places, 402 transitions, 6612 flow [2024-11-23 23:49:28,436 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=39, PETRI_DIFFERENCE_MINUEND_FLOW=5537, PETRI_DIFFERENCE_MINUEND_PLACES=128, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=370, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=96, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=250, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=6612, PETRI_PLACES=136, PETRI_TRANSITIONS=402} [2024-11-23 23:49:28,436 INFO L279 CegarLoopForPetriNet]: 38 programPoint places, 98 predicate places. [2024-11-23 23:49:28,436 INFO L471 AbstractCegarLoop]: Abstraction has has 136 places, 402 transitions, 6612 flow [2024-11-23 23:49:28,436 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 13.4) internal successors, (67), 5 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-23 23:49:28,436 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-23 23:49:28,436 INFO L206 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] [2024-11-23 23:49:28,448 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e14e5ed8-d474-4c9a-b98a-e2861b4e079a/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Ended with exit code 0 [2024-11-23 23:49:28,637 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e14e5ed8-d474-4c9a-b98a-e2861b4e079a/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-23 23:49:28,637 INFO L396 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-11-23 23:49:28,637 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-23 23:49:28,637 INFO L85 PathProgramCache]: Analyzing trace with hash -1574497558, now seen corresponding path program 6 times [2024-11-23 23:49:28,638 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2024-11-23 23:49:28,638 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [497897230] [2024-11-23 23:49:28,638 INFO L95 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2024-11-23 23:49:28,638 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-23 23:49:28,638 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e14e5ed8-d474-4c9a-b98a-e2861b4e079a/bin/uautomizer-verify-LYvppIcaGC/z3 [2024-11-23 23:49:28,640 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e14e5ed8-d474-4c9a-b98a-e2861b4e079a/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-23 23:49:28,641 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e14e5ed8-d474-4c9a-b98a-e2861b4e079a/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2024-11-23 23:49:28,761 INFO L229 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2024-11-23 23:49:28,761 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-23 23:49:28,765 INFO L256 TraceCheckSpWp]: Trace formula consists of 163 conjuncts, 8 conjuncts are in the unsatisfiable core [2024-11-23 23:49:28,766 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-23 23:49:28,913 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-11-23 23:49:28,913 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-23 23:49:28,991 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-11-23 23:49:28,991 INFO L136 FreeRefinementEngine]: Strategy FOX found an infeasible trace [2024-11-23 23:49:28,991 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [497897230] [2024-11-23 23:49:28,991 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [497897230] provided 1 perfect and 1 imperfect interpolant sequences [2024-11-23 23:49:28,991 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-11-23 23:49:28,991 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [5] total 9 [2024-11-23 23:49:28,991 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1788176314] [2024-11-23 23:49:28,991 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-23 23:49:28,991 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-11-23 23:49:28,992 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FOX [2024-11-23 23:49:28,992 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-11-23 23:49:28,992 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2024-11-23 23:49:29,007 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 39 [2024-11-23 23:49:29,008 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 136 places, 402 transitions, 6612 flow. Second operand has 5 states, 5 states have (on average 14.2) internal successors, (71), 5 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-23 23:49:29,008 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-23 23:49:29,008 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 39 [2024-11-23 23:49:29,008 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-23 23:49:31,630 INFO L124 PetriNetUnfolderBase]: 9747/16144 cut-off events. [2024-11-23 23:49:31,630 INFO L125 PetriNetUnfolderBase]: For 214558/214848 co-relation queries the response was YES. [2024-11-23 23:49:31,923 INFO L83 FinitePrefix]: Finished finitePrefix Result has 96812 conditions, 16144 events. 9747/16144 cut-off events. For 214558/214848 co-relation queries the response was YES. Maximal size of possible extension queue 721. Compared 117143 event pairs, 916 based on Foata normal form. 174/15650 useless extension candidates. Maximal degree in co-relation 79413. Up to 3912 conditions per place. [2024-11-23 23:49:31,972 INFO L140 encePairwiseOnDemand]: 32/39 looper letters, 236 selfloop transitions, 221 changer transitions 0/502 dead transitions. [2024-11-23 23:49:31,972 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 141 places, 502 transitions, 8880 flow [2024-11-23 23:49:31,973 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-11-23 23:49:31,974 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-11-23 23:49:31,974 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 124 transitions. [2024-11-23 23:49:31,974 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.5299145299145299 [2024-11-23 23:49:31,974 INFO L175 Difference]: Start difference. First operand has 136 places, 402 transitions, 6612 flow. Second operand 6 states and 124 transitions. [2024-11-23 23:49:31,974 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 141 places, 502 transitions, 8880 flow [2024-11-23 23:49:32,617 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 140 places, 502 transitions, 8705 flow, removed 20 selfloop flow, removed 1 redundant places. [2024-11-23 23:49:32,624 INFO L231 Difference]: Finished difference. Result has 145 places, 450 transitions, 8077 flow [2024-11-23 23:49:32,624 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=39, PETRI_DIFFERENCE_MINUEND_FLOW=6477, PETRI_DIFFERENCE_MINUEND_PLACES=135, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=402, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=173, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=195, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=8077, PETRI_PLACES=145, PETRI_TRANSITIONS=450} [2024-11-23 23:49:32,625 INFO L279 CegarLoopForPetriNet]: 38 programPoint places, 107 predicate places. [2024-11-23 23:49:32,625 INFO L471 AbstractCegarLoop]: Abstraction has has 145 places, 450 transitions, 8077 flow [2024-11-23 23:49:32,625 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 14.2) internal successors, (71), 5 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-23 23:49:32,625 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-23 23:49:32,625 INFO L206 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] [2024-11-23 23:49:32,635 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e14e5ed8-d474-4c9a-b98a-e2861b4e079a/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Ended with exit code 0 [2024-11-23 23:49:32,826 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e14e5ed8-d474-4c9a-b98a-e2861b4e079a/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-23 23:49:32,826 INFO L396 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-11-23 23:49:32,826 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-23 23:49:32,826 INFO L85 PathProgramCache]: Analyzing trace with hash -143371924, now seen corresponding path program 7 times [2024-11-23 23:49:32,826 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2024-11-23 23:49:32,826 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1035000370] [2024-11-23 23:49:32,827 INFO L95 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-11-23 23:49:32,827 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-23 23:49:32,827 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e14e5ed8-d474-4c9a-b98a-e2861b4e079a/bin/uautomizer-verify-LYvppIcaGC/z3 [2024-11-23 23:49:32,829 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e14e5ed8-d474-4c9a-b98a-e2861b4e079a/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-23 23:49:32,832 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e14e5ed8-d474-4c9a-b98a-e2861b4e079a/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2024-11-23 23:49:32,959 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-23 23:49:32,963 INFO L256 TraceCheckSpWp]: Trace formula consists of 163 conjuncts, 8 conjuncts are in the unsatisfiable core [2024-11-23 23:49:32,964 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-23 23:49:33,115 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-11-23 23:49:33,115 INFO L308 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-23 23:49:33,115 INFO L136 FreeRefinementEngine]: Strategy FOX found an infeasible trace [2024-11-23 23:49:33,115 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1035000370] [2024-11-23 23:49:33,115 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1035000370] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-23 23:49:33,116 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-23 23:49:33,116 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-11-23 23:49:33,116 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [146701077] [2024-11-23 23:49:33,116 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-23 23:49:33,116 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-11-23 23:49:33,116 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FOX [2024-11-23 23:49:33,116 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-11-23 23:49:33,116 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=16, Unknown=0, NotChecked=0, Total=30 [2024-11-23 23:49:33,141 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 39 [2024-11-23 23:49:33,141 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 145 places, 450 transitions, 8077 flow. Second operand has 6 states, 6 states have (on average 13.5) internal successors, (81), 6 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-23 23:49:33,141 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-23 23:49:33,141 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 39 [2024-11-23 23:49:33,141 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-23 23:49:36,456 INFO L124 PetriNetUnfolderBase]: 9889/16248 cut-off events. [2024-11-23 23:49:36,456 INFO L125 PetriNetUnfolderBase]: For 270920/271212 co-relation queries the response was YES. [2024-11-23 23:49:36,602 INFO L83 FinitePrefix]: Finished finitePrefix Result has 108021 conditions, 16248 events. 9889/16248 cut-off events. For 270920/271212 co-relation queries the response was YES. Maximal size of possible extension queue 809. Compared 118673 event pairs, 2074 based on Foata normal form. 48/15432 useless extension candidates. Maximal degree in co-relation 90869. Up to 6790 conditions per place. [2024-11-23 23:49:36,668 INFO L140 encePairwiseOnDemand]: 31/39 looper letters, 363 selfloop transitions, 70 changer transitions 11/554 dead transitions. [2024-11-23 23:49:36,668 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 150 places, 554 transitions, 10746 flow [2024-11-23 23:49:36,669 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-11-23 23:49:36,669 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-11-23 23:49:36,669 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 117 transitions. [2024-11-23 23:49:36,670 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.5 [2024-11-23 23:49:36,670 INFO L175 Difference]: Start difference. First operand has 145 places, 450 transitions, 8077 flow. Second operand 6 states and 117 transitions. [2024-11-23 23:49:36,670 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 150 places, 554 transitions, 10746 flow [2024-11-23 23:49:38,091 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 150 places, 554 transitions, 10736 flow, removed 5 selfloop flow, removed 0 redundant places. [2024-11-23 23:49:38,101 INFO L231 Difference]: Finished difference. Result has 152 places, 472 transitions, 8794 flow [2024-11-23 23:49:38,101 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=39, PETRI_DIFFERENCE_MINUEND_FLOW=8071, PETRI_DIFFERENCE_MINUEND_PLACES=145, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=450, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=48, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=388, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=8794, PETRI_PLACES=152, PETRI_TRANSITIONS=472} [2024-11-23 23:49:38,102 INFO L279 CegarLoopForPetriNet]: 38 programPoint places, 114 predicate places. [2024-11-23 23:49:38,102 INFO L471 AbstractCegarLoop]: Abstraction has has 152 places, 472 transitions, 8794 flow [2024-11-23 23:49:38,102 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 13.5) internal successors, (81), 6 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-23 23:49:38,102 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-23 23:49:38,102 INFO L206 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] [2024-11-23 23:49:38,110 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e14e5ed8-d474-4c9a-b98a-e2861b4e079a/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Ended with exit code 0 [2024-11-23 23:49:38,303 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e14e5ed8-d474-4c9a-b98a-e2861b4e079a/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-23 23:49:38,303 INFO L396 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-11-23 23:49:38,303 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-23 23:49:38,303 INFO L85 PathProgramCache]: Analyzing trace with hash 817276100, now seen corresponding path program 8 times [2024-11-23 23:49:38,304 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2024-11-23 23:49:38,304 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1238852879] [2024-11-23 23:49:38,304 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-23 23:49:38,304 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-23 23:49:38,304 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e14e5ed8-d474-4c9a-b98a-e2861b4e079a/bin/uautomizer-verify-LYvppIcaGC/z3 [2024-11-23 23:49:38,305 INFO L229 MonitoredProcess]: Starting monitored process 20 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e14e5ed8-d474-4c9a-b98a-e2861b4e079a/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-23 23:49:38,307 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e14e5ed8-d474-4c9a-b98a-e2861b4e079a/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2024-11-23 23:49:38,446 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-23 23:49:38,446 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-23 23:49:38,450 INFO L256 TraceCheckSpWp]: Trace formula consists of 163 conjuncts, 8 conjuncts are in the unsatisfiable core [2024-11-23 23:49:38,452 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-23 23:49:38,566 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-11-23 23:49:38,566 INFO L308 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-23 23:49:38,566 INFO L136 FreeRefinementEngine]: Strategy FOX found an infeasible trace [2024-11-23 23:49:38,567 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1238852879] [2024-11-23 23:49:38,567 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1238852879] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-23 23:49:38,567 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-23 23:49:38,567 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-11-23 23:49:38,567 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [704244006] [2024-11-23 23:49:38,567 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-23 23:49:38,567 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-11-23 23:49:38,567 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FOX [2024-11-23 23:49:38,568 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-11-23 23:49:38,568 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2024-11-23 23:49:38,590 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 39 [2024-11-23 23:49:38,590 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 152 places, 472 transitions, 8794 flow. Second operand has 6 states, 6 states have (on average 13.5) internal successors, (81), 6 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-23 23:49:38,590 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-23 23:49:38,590 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 39 [2024-11-23 23:49:38,590 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-23 23:49:42,019 INFO L124 PetriNetUnfolderBase]: 9557/15584 cut-off events. [2024-11-23 23:49:42,020 INFO L125 PetriNetUnfolderBase]: For 286784/287160 co-relation queries the response was YES. [2024-11-23 23:49:42,110 INFO L83 FinitePrefix]: Finished finitePrefix Result has 106257 conditions, 15584 events. 9557/15584 cut-off events. For 286784/287160 co-relation queries the response was YES. Maximal size of possible extension queue 773. Compared 112125 event pairs, 1674 based on Foata normal form. 86/14754 useless extension candidates. Maximal degree in co-relation 102626. Up to 5392 conditions per place. [2024-11-23 23:49:42,189 INFO L140 encePairwiseOnDemand]: 31/39 looper letters, 377 selfloop transitions, 83 changer transitions 15/585 dead transitions. [2024-11-23 23:49:42,189 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 156 places, 585 transitions, 11590 flow [2024-11-23 23:49:42,190 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-11-23 23:49:42,190 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-11-23 23:49:42,191 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 117 transitions. [2024-11-23 23:49:42,191 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.5 [2024-11-23 23:49:42,191 INFO L175 Difference]: Start difference. First operand has 152 places, 472 transitions, 8794 flow. Second operand 6 states and 117 transitions. [2024-11-23 23:49:42,191 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 156 places, 585 transitions, 11590 flow [2024-11-23 23:49:43,410 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 153 places, 585 transitions, 11514 flow, removed 4 selfloop flow, removed 3 redundant places. [2024-11-23 23:49:43,417 INFO L231 Difference]: Finished difference. Result has 156 places, 488 transitions, 9393 flow [2024-11-23 23:49:43,417 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=39, PETRI_DIFFERENCE_MINUEND_FLOW=8737, PETRI_DIFFERENCE_MINUEND_PLACES=148, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=472, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=66, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=389, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=9393, PETRI_PLACES=156, PETRI_TRANSITIONS=488} [2024-11-23 23:49:43,418 INFO L279 CegarLoopForPetriNet]: 38 programPoint places, 118 predicate places. [2024-11-23 23:49:43,418 INFO L471 AbstractCegarLoop]: Abstraction has has 156 places, 488 transitions, 9393 flow [2024-11-23 23:49:43,418 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 13.5) internal successors, (81), 6 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-23 23:49:43,418 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-23 23:49:43,418 INFO L206 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] [2024-11-23 23:49:43,425 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e14e5ed8-d474-4c9a-b98a-e2861b4e079a/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Ended with exit code 0 [2024-11-23 23:49:43,618 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e14e5ed8-d474-4c9a-b98a-e2861b4e079a/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-23 23:49:43,619 INFO L396 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-11-23 23:49:43,619 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-23 23:49:43,619 INFO L85 PathProgramCache]: Analyzing trace with hash 1417807688, now seen corresponding path program 1 times [2024-11-23 23:49:43,619 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2024-11-23 23:49:43,619 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1382304223] [2024-11-23 23:49:43,619 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-23 23:49:43,619 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-23 23:49:43,620 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e14e5ed8-d474-4c9a-b98a-e2861b4e079a/bin/uautomizer-verify-LYvppIcaGC/z3 [2024-11-23 23:49:43,621 INFO L229 MonitoredProcess]: Starting monitored process 21 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e14e5ed8-d474-4c9a-b98a-e2861b4e079a/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-23 23:49:43,622 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e14e5ed8-d474-4c9a-b98a-e2861b4e079a/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2024-11-23 23:49:43,725 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-23 23:49:43,729 INFO L256 TraceCheckSpWp]: Trace formula consists of 156 conjuncts, 4 conjuncts are in the unsatisfiable core [2024-11-23 23:49:43,729 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-23 23:49:43,769 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-11-23 23:49:43,769 INFO L308 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-23 23:49:43,769 INFO L136 FreeRefinementEngine]: Strategy FOX found an infeasible trace [2024-11-23 23:49:43,769 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1382304223] [2024-11-23 23:49:43,769 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1382304223] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-23 23:49:43,769 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-23 23:49:43,769 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-11-23 23:49:43,769 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1128401492] [2024-11-23 23:49:43,769 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-23 23:49:43,769 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-11-23 23:49:43,770 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FOX [2024-11-23 23:49:43,770 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-11-23 23:49:43,770 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2024-11-23 23:49:43,780 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 39 [2024-11-23 23:49:43,780 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 156 places, 488 transitions, 9393 flow. Second operand has 5 states, 5 states have (on average 11.6) internal successors, (58), 5 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-23 23:49:43,780 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-23 23:49:43,780 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 39 [2024-11-23 23:49:43,780 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-23 23:49:48,081 INFO L124 PetriNetUnfolderBase]: 12995/18922 cut-off events. [2024-11-23 23:49:48,081 INFO L125 PetriNetUnfolderBase]: For 348924/349008 co-relation queries the response was YES. [2024-11-23 23:49:48,398 INFO L83 FinitePrefix]: Finished finitePrefix Result has 123459 conditions, 18922 events. 12995/18922 cut-off events. For 348924/349008 co-relation queries the response was YES. Maximal size of possible extension queue 735. Compared 112012 event pairs, 1356 based on Foata normal form. 20/18530 useless extension candidates. Maximal degree in co-relation 114844. Up to 10012 conditions per place. [2024-11-23 23:49:48,461 INFO L140 encePairwiseOnDemand]: 32/39 looper letters, 415 selfloop transitions, 24 changer transitions 35/612 dead transitions. [2024-11-23 23:49:48,461 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 159 places, 612 transitions, 12134 flow [2024-11-23 23:49:48,462 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-11-23 23:49:48,462 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-11-23 23:49:48,463 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 113 transitions. [2024-11-23 23:49:48,463 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.4829059829059829 [2024-11-23 23:49:48,463 INFO L175 Difference]: Start difference. First operand has 156 places, 488 transitions, 9393 flow. Second operand 6 states and 113 transitions. [2024-11-23 23:49:48,463 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 159 places, 612 transitions, 12134 flow [2024-11-23 23:49:50,527 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 142 places, 612 transitions, 11024 flow, removed 26 selfloop flow, removed 17 redundant places. [2024-11-23 23:49:50,536 INFO L231 Difference]: Finished difference. Result has 147 places, 419 transitions, 6791 flow [2024-11-23 23:49:50,537 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=39, PETRI_DIFFERENCE_MINUEND_FLOW=7098, PETRI_DIFFERENCE_MINUEND_PLACES=137, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=429, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=15, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=408, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=6791, PETRI_PLACES=147, PETRI_TRANSITIONS=419} [2024-11-23 23:49:50,537 INFO L279 CegarLoopForPetriNet]: 38 programPoint places, 109 predicate places. [2024-11-23 23:49:50,537 INFO L471 AbstractCegarLoop]: Abstraction has has 147 places, 419 transitions, 6791 flow [2024-11-23 23:49:50,537 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 11.6) internal successors, (58), 5 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-23 23:49:50,537 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-23 23:49:50,537 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-23 23:49:50,544 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e14e5ed8-d474-4c9a-b98a-e2861b4e079a/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Ended with exit code 0 [2024-11-23 23:49:50,738 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e14e5ed8-d474-4c9a-b98a-e2861b4e079a/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-23 23:49:50,738 INFO L396 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-11-23 23:49:50,738 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-23 23:49:50,738 INFO L85 PathProgramCache]: Analyzing trace with hash -2106980899, now seen corresponding path program 1 times [2024-11-23 23:49:50,739 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2024-11-23 23:49:50,739 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1323755023] [2024-11-23 23:49:50,739 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-23 23:49:50,739 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-23 23:49:50,739 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e14e5ed8-d474-4c9a-b98a-e2861b4e079a/bin/uautomizer-verify-LYvppIcaGC/z3 [2024-11-23 23:49:50,741 INFO L229 MonitoredProcess]: Starting monitored process 22 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e14e5ed8-d474-4c9a-b98a-e2861b4e079a/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-23 23:49:50,742 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e14e5ed8-d474-4c9a-b98a-e2861b4e079a/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2024-11-23 23:49:50,871 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-23 23:49:50,877 INFO L256 TraceCheckSpWp]: Trace formula consists of 165 conjuncts, 8 conjuncts are in the unsatisfiable core [2024-11-23 23:49:50,878 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-23 23:49:50,987 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-11-23 23:49:50,987 INFO L308 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-23 23:49:50,987 INFO L136 FreeRefinementEngine]: Strategy FOX found an infeasible trace [2024-11-23 23:49:50,987 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1323755023] [2024-11-23 23:49:50,987 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1323755023] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-23 23:49:50,987 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-23 23:49:50,987 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-11-23 23:49:50,987 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1780339417] [2024-11-23 23:49:50,987 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-23 23:49:50,988 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-11-23 23:49:50,988 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FOX [2024-11-23 23:49:50,988 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-11-23 23:49:50,988 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2024-11-23 23:49:51,001 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 39 [2024-11-23 23:49:51,001 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 147 places, 419 transitions, 6791 flow. Second operand has 6 states, 6 states have (on average 13.666666666666666) internal successors, (82), 6 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-23 23:49:51,002 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-23 23:49:51,002 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 39 [2024-11-23 23:49:51,002 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-23 23:49:53,550 INFO L124 PetriNetUnfolderBase]: 7855/13076 cut-off events. [2024-11-23 23:49:53,550 INFO L125 PetriNetUnfolderBase]: For 170581/171037 co-relation queries the response was YES. [2024-11-23 23:49:53,611 INFO L83 FinitePrefix]: Finished finitePrefix Result has 82133 conditions, 13076 events. 7855/13076 cut-off events. For 170581/171037 co-relation queries the response was YES. Maximal size of possible extension queue 637. Compared 92697 event pairs, 1784 based on Foata normal form. 64/12861 useless extension candidates. Maximal degree in co-relation 66461. Up to 6590 conditions per place. [2024-11-23 23:49:53,655 INFO L140 encePairwiseOnDemand]: 32/39 looper letters, 266 selfloop transitions, 97 changer transitions 16/485 dead transitions. [2024-11-23 23:49:53,656 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 151 places, 485 transitions, 8308 flow [2024-11-23 23:49:53,656 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-11-23 23:49:53,657 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-11-23 23:49:53,657 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 124 transitions. [2024-11-23 23:49:53,657 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.5299145299145299 [2024-11-23 23:49:53,657 INFO L175 Difference]: Start difference. First operand has 147 places, 419 transitions, 6791 flow. Second operand 6 states and 124 transitions. [2024-11-23 23:49:53,657 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 151 places, 485 transitions, 8308 flow [2024-11-23 23:49:54,195 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 151 places, 485 transitions, 8304 flow, removed 2 selfloop flow, removed 0 redundant places. [2024-11-23 23:49:54,200 INFO L231 Difference]: Finished difference. Result has 153 places, 416 transitions, 6960 flow [2024-11-23 23:49:54,200 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=39, PETRI_DIFFERENCE_MINUEND_FLOW=6787, PETRI_DIFFERENCE_MINUEND_PLACES=146, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=419, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=97, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=322, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=6960, PETRI_PLACES=153, PETRI_TRANSITIONS=416} [2024-11-23 23:49:54,200 INFO L279 CegarLoopForPetriNet]: 38 programPoint places, 115 predicate places. [2024-11-23 23:49:54,201 INFO L471 AbstractCegarLoop]: Abstraction has has 153 places, 416 transitions, 6960 flow [2024-11-23 23:49:54,201 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 13.666666666666666) internal successors, (82), 6 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-23 23:49:54,201 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-23 23:49:54,201 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-23 23:49:54,207 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e14e5ed8-d474-4c9a-b98a-e2861b4e079a/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Forceful destruction successful, exit code 0 [2024-11-23 23:49:54,401 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e14e5ed8-d474-4c9a-b98a-e2861b4e079a/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-23 23:49:54,401 INFO L396 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-11-23 23:49:54,402 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-23 23:49:54,402 INFO L85 PathProgramCache]: Analyzing trace with hash -207339157, now seen corresponding path program 2 times [2024-11-23 23:49:54,402 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2024-11-23 23:49:54,402 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [970880356] [2024-11-23 23:49:54,402 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-23 23:49:54,402 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-23 23:49:54,402 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e14e5ed8-d474-4c9a-b98a-e2861b4e079a/bin/uautomizer-verify-LYvppIcaGC/z3 [2024-11-23 23:49:54,404 INFO L229 MonitoredProcess]: Starting monitored process 23 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e14e5ed8-d474-4c9a-b98a-e2861b4e079a/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-23 23:49:54,405 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e14e5ed8-d474-4c9a-b98a-e2861b4e079a/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2024-11-23 23:49:54,510 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2024-11-23 23:49:54,510 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-23 23:49:54,513 INFO L256 TraceCheckSpWp]: Trace formula consists of 150 conjuncts, 8 conjuncts are in the unsatisfiable core [2024-11-23 23:49:54,514 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-23 23:49:54,648 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-11-23 23:49:54,648 INFO L308 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-23 23:49:54,648 INFO L136 FreeRefinementEngine]: Strategy FOX found an infeasible trace [2024-11-23 23:49:54,648 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [970880356] [2024-11-23 23:49:54,648 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [970880356] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-23 23:49:54,648 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-23 23:49:54,648 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-11-23 23:49:54,648 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1635784293] [2024-11-23 23:49:54,648 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-23 23:49:54,649 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-11-23 23:49:54,649 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FOX [2024-11-23 23:49:54,649 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-11-23 23:49:54,649 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2024-11-23 23:49:54,670 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 39 [2024-11-23 23:49:54,670 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 153 places, 416 transitions, 6960 flow. Second operand has 6 states, 6 states have (on average 13.666666666666666) internal successors, (82), 6 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-23 23:49:54,670 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-23 23:49:54,670 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 39 [2024-11-23 23:49:54,670 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-23 23:49:57,672 INFO L124 PetriNetUnfolderBase]: 8785/14414 cut-off events. [2024-11-23 23:49:57,672 INFO L125 PetriNetUnfolderBase]: For 230389/230997 co-relation queries the response was YES. [2024-11-23 23:49:57,762 INFO L83 FinitePrefix]: Finished finitePrefix Result has 92507 conditions, 14414 events. 8785/14414 cut-off events. For 230389/230997 co-relation queries the response was YES. Maximal size of possible extension queue 697. Compared 102303 event pairs, 662 based on Foata normal form. 448/14575 useless extension candidates. Maximal degree in co-relation 89490. Up to 6020 conditions per place. [2024-11-23 23:49:57,819 INFO L140 encePairwiseOnDemand]: 31/39 looper letters, 294 selfloop transitions, 131 changer transitions 3/534 dead transitions. [2024-11-23 23:49:57,819 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 159 places, 534 transitions, 9420 flow [2024-11-23 23:49:57,820 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-11-23 23:49:57,820 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-11-23 23:49:57,820 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 157 transitions. [2024-11-23 23:49:57,821 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.5032051282051282 [2024-11-23 23:49:57,821 INFO L175 Difference]: Start difference. First operand has 153 places, 416 transitions, 6960 flow. Second operand 8 states and 157 transitions. [2024-11-23 23:49:57,821 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 159 places, 534 transitions, 9420 flow [2024-11-23 23:49:58,679 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 155 places, 534 transitions, 9174 flow, removed 6 selfloop flow, removed 4 redundant places. [2024-11-23 23:49:58,685 INFO L231 Difference]: Finished difference. Result has 158 places, 452 transitions, 7883 flow [2024-11-23 23:49:58,686 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=39, PETRI_DIFFERENCE_MINUEND_FLOW=6789, PETRI_DIFFERENCE_MINUEND_PLACES=148, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=416, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=95, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=291, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=7883, PETRI_PLACES=158, PETRI_TRANSITIONS=452} [2024-11-23 23:49:58,686 INFO L279 CegarLoopForPetriNet]: 38 programPoint places, 120 predicate places. [2024-11-23 23:49:58,686 INFO L471 AbstractCegarLoop]: Abstraction has has 158 places, 452 transitions, 7883 flow [2024-11-23 23:49:58,686 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 13.666666666666666) internal successors, (82), 6 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-23 23:49:58,686 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-23 23:49:58,686 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-23 23:49:58,694 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e14e5ed8-d474-4c9a-b98a-e2861b4e079a/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Ended with exit code 0 [2024-11-23 23:49:58,887 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 23 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e14e5ed8-d474-4c9a-b98a-e2861b4e079a/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-23 23:49:58,887 INFO L396 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-11-23 23:49:58,887 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-23 23:49:58,888 INFO L85 PathProgramCache]: Analyzing trace with hash 883348855, now seen corresponding path program 3 times [2024-11-23 23:49:58,888 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2024-11-23 23:49:58,888 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1695521686] [2024-11-23 23:49:58,888 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-23 23:49:58,888 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-23 23:49:58,888 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e14e5ed8-d474-4c9a-b98a-e2861b4e079a/bin/uautomizer-verify-LYvppIcaGC/z3 [2024-11-23 23:49:58,890 INFO L229 MonitoredProcess]: Starting monitored process 24 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e14e5ed8-d474-4c9a-b98a-e2861b4e079a/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-23 23:49:58,891 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e14e5ed8-d474-4c9a-b98a-e2861b4e079a/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Waiting until timeout for monitored process [2024-11-23 23:49:58,999 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 1 check-sat command(s) [2024-11-23 23:49:58,999 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-23 23:49:59,003 INFO L256 TraceCheckSpWp]: Trace formula consists of 144 conjuncts, 8 conjuncts are in the unsatisfiable core [2024-11-23 23:49:59,003 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-23 23:49:59,142 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-11-23 23:49:59,142 INFO L308 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-23 23:49:59,142 INFO L136 FreeRefinementEngine]: Strategy FOX found an infeasible trace [2024-11-23 23:49:59,142 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1695521686] [2024-11-23 23:49:59,142 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1695521686] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-23 23:49:59,142 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-23 23:49:59,142 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-11-23 23:49:59,142 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1725845364] [2024-11-23 23:49:59,142 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-23 23:49:59,143 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-11-23 23:49:59,143 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FOX [2024-11-23 23:49:59,143 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-11-23 23:49:59,143 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2024-11-23 23:49:59,151 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 39 [2024-11-23 23:49:59,151 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 158 places, 452 transitions, 7883 flow. Second operand has 6 states, 6 states have (on average 13.666666666666666) internal successors, (82), 6 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-23 23:49:59,151 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-23 23:49:59,151 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 39 [2024-11-23 23:49:59,151 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-23 23:50:02,373 INFO L124 PetriNetUnfolderBase]: 8969/14986 cut-off events. [2024-11-23 23:50:02,373 INFO L125 PetriNetUnfolderBase]: For 246447/247109 co-relation queries the response was YES. [2024-11-23 23:50:02,475 INFO L83 FinitePrefix]: Finished finitePrefix Result has 97631 conditions, 14986 events. 8969/14986 cut-off events. For 246447/247109 co-relation queries the response was YES. Maximal size of possible extension queue 754. Compared 109880 event pairs, 2044 based on Foata normal form. 70/14699 useless extension candidates. Maximal degree in co-relation 95396. Up to 8690 conditions per place. [2024-11-23 23:50:02,536 INFO L140 encePairwiseOnDemand]: 31/39 looper letters, 251 selfloop transitions, 141 changer transitions 7/505 dead transitions. [2024-11-23 23:50:02,536 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 163 places, 505 transitions, 9309 flow [2024-11-23 23:50:02,537 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-11-23 23:50:02,538 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-11-23 23:50:02,538 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 124 transitions. [2024-11-23 23:50:02,538 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.5299145299145299 [2024-11-23 23:50:02,538 INFO L175 Difference]: Start difference. First operand has 158 places, 452 transitions, 7883 flow. Second operand 6 states and 124 transitions. [2024-11-23 23:50:02,538 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 163 places, 505 transitions, 9309 flow [2024-11-23 23:50:03,555 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 159 places, 505 transitions, 9083 flow, removed 28 selfloop flow, removed 4 redundant places. [2024-11-23 23:50:03,561 INFO L231 Difference]: Finished difference. Result has 160 places, 454 transitions, 8031 flow [2024-11-23 23:50:03,561 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=39, PETRI_DIFFERENCE_MINUEND_FLOW=7669, PETRI_DIFFERENCE_MINUEND_PLACES=154, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=452, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=135, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=311, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=8031, PETRI_PLACES=160, PETRI_TRANSITIONS=454} [2024-11-23 23:50:03,562 INFO L279 CegarLoopForPetriNet]: 38 programPoint places, 122 predicate places. [2024-11-23 23:50:03,562 INFO L471 AbstractCegarLoop]: Abstraction has has 160 places, 454 transitions, 8031 flow [2024-11-23 23:50:03,562 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 13.666666666666666) internal successors, (82), 6 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-23 23:50:03,562 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-23 23:50:03,562 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-23 23:50:03,569 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e14e5ed8-d474-4c9a-b98a-e2861b4e079a/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Ended with exit code 0 [2024-11-23 23:50:03,762 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e14e5ed8-d474-4c9a-b98a-e2861b4e079a/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-23 23:50:03,762 INFO L396 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-11-23 23:50:03,763 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-23 23:50:03,763 INFO L85 PathProgramCache]: Analyzing trace with hash 1013527911, now seen corresponding path program 4 times [2024-11-23 23:50:03,763 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2024-11-23 23:50:03,763 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [118251252] [2024-11-23 23:50:03,763 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-11-23 23:50:03,764 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-23 23:50:03,764 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e14e5ed8-d474-4c9a-b98a-e2861b4e079a/bin/uautomizer-verify-LYvppIcaGC/z3 [2024-11-23 23:50:03,770 INFO L229 MonitoredProcess]: Starting monitored process 25 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e14e5ed8-d474-4c9a-b98a-e2861b4e079a/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-23 23:50:03,771 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e14e5ed8-d474-4c9a-b98a-e2861b4e079a/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Waiting until timeout for monitored process [2024-11-23 23:50:03,873 INFO L229 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-11-23 23:50:03,873 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-23 23:50:03,876 INFO L256 TraceCheckSpWp]: Trace formula consists of 75 conjuncts, 4 conjuncts are in the unsatisfiable core [2024-11-23 23:50:03,877 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-23 23:50:03,954 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-11-23 23:50:03,955 INFO L308 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-23 23:50:03,955 INFO L136 FreeRefinementEngine]: Strategy FOX found an infeasible trace [2024-11-23 23:50:03,955 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [118251252] [2024-11-23 23:50:03,955 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [118251252] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-23 23:50:03,955 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-23 23:50:03,955 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-11-23 23:50:03,955 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [879012593] [2024-11-23 23:50:03,955 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-23 23:50:03,955 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-11-23 23:50:03,956 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FOX [2024-11-23 23:50:03,956 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-11-23 23:50:03,956 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2024-11-23 23:50:03,964 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 39 [2024-11-23 23:50:03,965 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 160 places, 454 transitions, 8031 flow. Second operand has 5 states, 5 states have (on average 14.6) internal successors, (73), 5 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-23 23:50:03,965 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-23 23:50:03,965 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 39 [2024-11-23 23:50:03,965 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-23 23:50:07,165 INFO L124 PetriNetUnfolderBase]: 9169/15270 cut-off events. [2024-11-23 23:50:07,165 INFO L125 PetriNetUnfolderBase]: For 277975/278733 co-relation queries the response was YES. [2024-11-23 23:50:07,243 INFO L83 FinitePrefix]: Finished finitePrefix Result has 99473 conditions, 15270 events. 9169/15270 cut-off events. For 277975/278733 co-relation queries the response was YES. Maximal size of possible extension queue 770. Compared 112636 event pairs, 2082 based on Foata normal form. 408/15289 useless extension candidates. Maximal degree in co-relation 98570. Up to 8881 conditions per place. [2024-11-23 23:50:07,298 INFO L140 encePairwiseOnDemand]: 32/39 looper letters, 251 selfloop transitions, 150 changer transitions 0/507 dead transitions. [2024-11-23 23:50:07,298 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 165 places, 507 transitions, 9308 flow [2024-11-23 23:50:07,299 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-11-23 23:50:07,299 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-11-23 23:50:07,299 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 131 transitions. [2024-11-23 23:50:07,299 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.5598290598290598 [2024-11-23 23:50:07,299 INFO L175 Difference]: Start difference. First operand has 160 places, 454 transitions, 8031 flow. Second operand 6 states and 131 transitions. [2024-11-23 23:50:07,300 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 165 places, 507 transitions, 9308 flow [2024-11-23 23:50:08,276 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 161 places, 507 transitions, 8998 flow, removed 9 selfloop flow, removed 4 redundant places. [2024-11-23 23:50:08,282 INFO L231 Difference]: Finished difference. Result has 161 places, 460 transitions, 8081 flow [2024-11-23 23:50:08,282 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=39, PETRI_DIFFERENCE_MINUEND_FLOW=7463, PETRI_DIFFERENCE_MINUEND_PLACES=156, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=442, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=132, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=310, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=8081, PETRI_PLACES=161, PETRI_TRANSITIONS=460} [2024-11-23 23:50:08,283 INFO L279 CegarLoopForPetriNet]: 38 programPoint places, 123 predicate places. [2024-11-23 23:50:08,283 INFO L471 AbstractCegarLoop]: Abstraction has has 161 places, 460 transitions, 8081 flow [2024-11-23 23:50:08,283 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 14.6) internal successors, (73), 5 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-23 23:50:08,283 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-23 23:50:08,283 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-23 23:50:08,290 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e14e5ed8-d474-4c9a-b98a-e2861b4e079a/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Ended with exit code 0 [2024-11-23 23:50:08,484 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 25 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e14e5ed8-d474-4c9a-b98a-e2861b4e079a/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-23 23:50:08,484 INFO L396 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-11-23 23:50:08,484 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-23 23:50:08,484 INFO L85 PathProgramCache]: Analyzing trace with hash 304378669, now seen corresponding path program 5 times [2024-11-23 23:50:08,485 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2024-11-23 23:50:08,485 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [550889190] [2024-11-23 23:50:08,485 INFO L95 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-11-23 23:50:08,485 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-23 23:50:08,485 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e14e5ed8-d474-4c9a-b98a-e2861b4e079a/bin/uautomizer-verify-LYvppIcaGC/z3 [2024-11-23 23:50:08,487 INFO L229 MonitoredProcess]: Starting monitored process 26 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e14e5ed8-d474-4c9a-b98a-e2861b4e079a/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-23 23:50:08,488 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e14e5ed8-d474-4c9a-b98a-e2861b4e079a/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Waiting until timeout for monitored process [2024-11-23 23:50:08,606 INFO L229 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-23 23:50:08,607 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-23 23:50:08,611 INFO L256 TraceCheckSpWp]: Trace formula consists of 165 conjuncts, 8 conjuncts are in the unsatisfiable core [2024-11-23 23:50:08,612 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-23 23:50:08,776 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-11-23 23:50:08,776 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-23 23:50:08,860 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-11-23 23:50:08,860 INFO L136 FreeRefinementEngine]: Strategy FOX found an infeasible trace [2024-11-23 23:50:08,860 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [550889190] [2024-11-23 23:50:08,860 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [550889190] provided 1 perfect and 1 imperfect interpolant sequences [2024-11-23 23:50:08,861 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-11-23 23:50:08,861 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [5] total 9 [2024-11-23 23:50:08,861 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1855158801] [2024-11-23 23:50:08,861 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-23 23:50:08,861 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-11-23 23:50:08,861 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FOX [2024-11-23 23:50:08,862 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-11-23 23:50:08,862 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=44, Unknown=0, NotChecked=0, Total=72 [2024-11-23 23:50:08,873 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 39 [2024-11-23 23:50:08,873 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 161 places, 460 transitions, 8081 flow. Second operand has 5 states, 5 states have (on average 14.6) internal successors, (73), 5 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-23 23:50:08,873 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-23 23:50:08,873 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 39 [2024-11-23 23:50:08,873 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-23 23:50:12,431 INFO L124 PetriNetUnfolderBase]: 11033/18284 cut-off events. [2024-11-23 23:50:12,431 INFO L125 PetriNetUnfolderBase]: For 281879/282291 co-relation queries the response was YES. [2024-11-23 23:50:12,534 INFO L83 FinitePrefix]: Finished finitePrefix Result has 115264 conditions, 18284 events. 11033/18284 cut-off events. For 281879/282291 co-relation queries the response was YES. Maximal size of possible extension queue 806. Compared 135872 event pairs, 1828 based on Foata normal form. 200/18159 useless extension candidates. Maximal degree in co-relation 114425. Up to 8285 conditions per place. [2024-11-23 23:50:12,622 INFO L140 encePairwiseOnDemand]: 33/39 looper letters, 387 selfloop transitions, 163 changer transitions 17/616 dead transitions. [2024-11-23 23:50:12,622 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 166 places, 616 transitions, 11580 flow [2024-11-23 23:50:12,623 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-11-23 23:50:12,623 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-11-23 23:50:12,624 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 139 transitions. [2024-11-23 23:50:12,624 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.594017094017094 [2024-11-23 23:50:12,624 INFO L175 Difference]: Start difference. First operand has 161 places, 460 transitions, 8081 flow. Second operand 6 states and 139 transitions. [2024-11-23 23:50:12,624 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 166 places, 616 transitions, 11580 flow [2024-11-23 23:50:13,584 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 164 places, 616 transitions, 11282 flow, removed 48 selfloop flow, removed 2 redundant places. [2024-11-23 23:50:13,593 INFO L231 Difference]: Finished difference. Result has 168 places, 488 transitions, 8822 flow [2024-11-23 23:50:13,594 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=39, PETRI_DIFFERENCE_MINUEND_FLOW=7726, PETRI_DIFFERENCE_MINUEND_PLACES=159, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=455, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=123, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=323, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=8822, PETRI_PLACES=168, PETRI_TRANSITIONS=488} [2024-11-23 23:50:13,594 INFO L279 CegarLoopForPetriNet]: 38 programPoint places, 130 predicate places. [2024-11-23 23:50:13,594 INFO L471 AbstractCegarLoop]: Abstraction has has 168 places, 488 transitions, 8822 flow [2024-11-23 23:50:13,594 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 14.6) internal successors, (73), 5 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-23 23:50:13,594 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-23 23:50:13,594 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-23 23:50:13,602 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e14e5ed8-d474-4c9a-b98a-e2861b4e079a/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Ended with exit code 0 [2024-11-23 23:50:13,795 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e14e5ed8-d474-4c9a-b98a-e2861b4e079a/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-23 23:50:13,795 INFO L396 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-11-23 23:50:13,795 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-23 23:50:13,795 INFO L85 PathProgramCache]: Analyzing trace with hash -758128423, now seen corresponding path program 6 times [2024-11-23 23:50:13,796 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2024-11-23 23:50:13,796 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2142336528] [2024-11-23 23:50:13,796 INFO L95 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2024-11-23 23:50:13,796 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-23 23:50:13,796 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e14e5ed8-d474-4c9a-b98a-e2861b4e079a/bin/uautomizer-verify-LYvppIcaGC/z3 [2024-11-23 23:50:13,798 INFO L229 MonitoredProcess]: Starting monitored process 27 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e14e5ed8-d474-4c9a-b98a-e2861b4e079a/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-23 23:50:13,799 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e14e5ed8-d474-4c9a-b98a-e2861b4e079a/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Waiting until timeout for monitored process [2024-11-23 23:50:13,925 INFO L229 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 1 check-sat command(s) [2024-11-23 23:50:13,925 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-23 23:50:13,931 INFO L256 TraceCheckSpWp]: Trace formula consists of 141 conjuncts, 8 conjuncts are in the unsatisfiable core [2024-11-23 23:50:13,932 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-23 23:50:14,105 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-11-23 23:50:14,105 INFO L308 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-23 23:50:14,106 INFO L136 FreeRefinementEngine]: Strategy FOX found an infeasible trace [2024-11-23 23:50:14,106 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2142336528] [2024-11-23 23:50:14,106 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2142336528] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-23 23:50:14,106 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-23 23:50:14,106 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-11-23 23:50:14,106 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1790079084] [2024-11-23 23:50:14,106 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-23 23:50:14,107 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-11-23 23:50:14,107 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FOX [2024-11-23 23:50:14,107 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-11-23 23:50:14,107 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2024-11-23 23:50:14,133 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 39 [2024-11-23 23:50:14,133 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 168 places, 488 transitions, 8822 flow. Second operand has 6 states, 6 states have (on average 13.666666666666666) internal successors, (82), 6 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-23 23:50:14,134 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-23 23:50:14,134 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 39 [2024-11-23 23:50:14,134 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-23 23:50:17,868 INFO L124 PetriNetUnfolderBase]: 10765/17770 cut-off events. [2024-11-23 23:50:17,868 INFO L125 PetriNetUnfolderBase]: For 288333/288791 co-relation queries the response was YES. [2024-11-23 23:50:17,970 INFO L83 FinitePrefix]: Finished finitePrefix Result has 115632 conditions, 17770 events. 10765/17770 cut-off events. For 288333/288791 co-relation queries the response was YES. Maximal size of possible extension queue 799. Compared 131143 event pairs, 2202 based on Foata normal form. 146/17573 useless extension candidates. Maximal degree in co-relation 115513. Up to 8396 conditions per place. [2024-11-23 23:50:18,033 INFO L140 encePairwiseOnDemand]: 33/39 looper letters, 324 selfloop transitions, 158 changer transitions 20/551 dead transitions. [2024-11-23 23:50:18,033 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 169 places, 551 transitions, 10429 flow [2024-11-23 23:50:18,034 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-11-23 23:50:18,034 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-11-23 23:50:18,034 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 123 transitions. [2024-11-23 23:50:18,035 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.5256410256410257 [2024-11-23 23:50:18,035 INFO L175 Difference]: Start difference. First operand has 168 places, 488 transitions, 8822 flow. Second operand 6 states and 123 transitions. [2024-11-23 23:50:18,035 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 169 places, 551 transitions, 10429 flow [2024-11-23 23:50:18,942 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 162 places, 551 transitions, 9967 flow, removed 30 selfloop flow, removed 7 redundant places. [2024-11-23 23:50:18,949 INFO L231 Difference]: Finished difference. Result has 163 places, 483 transitions, 8568 flow [2024-11-23 23:50:18,949 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=39, PETRI_DIFFERENCE_MINUEND_FLOW=8382, PETRI_DIFFERENCE_MINUEND_PLACES=157, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=488, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=158, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=330, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=8568, PETRI_PLACES=163, PETRI_TRANSITIONS=483} [2024-11-23 23:50:18,949 INFO L279 CegarLoopForPetriNet]: 38 programPoint places, 125 predicate places. [2024-11-23 23:50:18,950 INFO L471 AbstractCegarLoop]: Abstraction has has 163 places, 483 transitions, 8568 flow [2024-11-23 23:50:18,950 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 13.666666666666666) internal successors, (82), 6 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-23 23:50:18,950 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-23 23:50:18,950 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-23 23:50:18,960 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e14e5ed8-d474-4c9a-b98a-e2861b4e079a/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Ended with exit code 0 [2024-11-23 23:50:19,150 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e14e5ed8-d474-4c9a-b98a-e2861b4e079a/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-23 23:50:19,150 INFO L396 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-11-23 23:50:19,151 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-23 23:50:19,151 INFO L85 PathProgramCache]: Analyzing trace with hash 1248578345, now seen corresponding path program 7 times [2024-11-23 23:50:19,151 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2024-11-23 23:50:19,151 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [528796889] [2024-11-23 23:50:19,151 INFO L95 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-11-23 23:50:19,151 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-23 23:50:19,151 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e14e5ed8-d474-4c9a-b98a-e2861b4e079a/bin/uautomizer-verify-LYvppIcaGC/z3 [2024-11-23 23:50:19,153 INFO L229 MonitoredProcess]: Starting monitored process 28 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e14e5ed8-d474-4c9a-b98a-e2861b4e079a/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-23 23:50:19,156 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e14e5ed8-d474-4c9a-b98a-e2861b4e079a/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Waiting until timeout for monitored process [2024-11-23 23:50:19,270 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-23 23:50:19,274 INFO L256 TraceCheckSpWp]: Trace formula consists of 165 conjuncts, 8 conjuncts are in the unsatisfiable core [2024-11-23 23:50:19,275 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-23 23:50:19,439 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-11-23 23:50:19,439 INFO L308 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-23 23:50:19,439 INFO L136 FreeRefinementEngine]: Strategy FOX found an infeasible trace [2024-11-23 23:50:19,439 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [528796889] [2024-11-23 23:50:19,439 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [528796889] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-23 23:50:19,439 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-23 23:50:19,439 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-11-23 23:50:19,439 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2035411594] [2024-11-23 23:50:19,439 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-23 23:50:19,440 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-11-23 23:50:19,440 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FOX [2024-11-23 23:50:19,440 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-11-23 23:50:19,440 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2024-11-23 23:50:19,460 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 39 [2024-11-23 23:50:19,461 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 163 places, 483 transitions, 8568 flow. Second operand has 6 states, 6 states have (on average 13.666666666666666) internal successors, (82), 6 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-23 23:50:19,461 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-23 23:50:19,461 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 39 [2024-11-23 23:50:19,461 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-23 23:50:23,520 INFO L124 PetriNetUnfolderBase]: 12151/20224 cut-off events. [2024-11-23 23:50:23,520 INFO L125 PetriNetUnfolderBase]: For 330147/330543 co-relation queries the response was YES. [2024-11-23 23:50:23,648 INFO L83 FinitePrefix]: Finished finitePrefix Result has 127147 conditions, 20224 events. 12151/20224 cut-off events. For 330147/330543 co-relation queries the response was YES. Maximal size of possible extension queue 890. Compared 152698 event pairs, 620 based on Foata normal form. 234/20249 useless extension candidates. Maximal degree in co-relation 122620. Up to 6022 conditions per place. [2024-11-23 23:50:23,742 INFO L140 encePairwiseOnDemand]: 32/39 looper letters, 380 selfloop transitions, 198 changer transitions 3/630 dead transitions. [2024-11-23 23:50:23,742 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 169 places, 630 transitions, 12068 flow [2024-11-23 23:50:23,743 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-11-23 23:50:23,743 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-11-23 23:50:23,743 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 154 transitions. [2024-11-23 23:50:23,743 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.4935897435897436 [2024-11-23 23:50:23,743 INFO L175 Difference]: Start difference. First operand has 163 places, 483 transitions, 8568 flow. Second operand 8 states and 154 transitions. [2024-11-23 23:50:23,744 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 169 places, 630 transitions, 12068 flow