./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/weaver/popl20-figure1-alt.wvr.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version d790fecc Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4c6a019f-02cd-4563-9ada-3009abc1415a/bin/uautomizer-verify-aQ6SnzHsRB/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4c6a019f-02cd-4563-9ada-3009abc1415a/bin/uautomizer-verify-aQ6SnzHsRB/plugins/org.eclipse.equinox.launcher_1.6.800.v20240513-1750.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4c6a019f-02cd-4563-9ada-3009abc1415a/bin/uautomizer-verify-aQ6SnzHsRB/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4c6a019f-02cd-4563-9ada-3009abc1415a/bin/uautomizer-verify-aQ6SnzHsRB/config/AutomizerReach.xml -i ../../sv-benchmarks/c/weaver/popl20-figure1-alt.wvr.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4c6a019f-02cd-4563-9ada-3009abc1415a/bin/uautomizer-verify-aQ6SnzHsRB/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4c6a019f-02cd-4563-9ada-3009abc1415a/bin/uautomizer-verify-aQ6SnzHsRB --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 e66d74cf738883d82d8ab680e594f84e8947532df35a185c16ed9746f38b197c --- Real Ultimate output --- This is Ultimate 0.3.0-dev-d790fec [2024-11-28 02:07:04,071 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-11-28 02:07:04,145 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4c6a019f-02cd-4563-9ada-3009abc1415a/bin/uautomizer-verify-aQ6SnzHsRB/config/svcomp-Reach-32bit-Automizer_Default.epf [2024-11-28 02:07:04,150 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-11-28 02:07:04,151 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-11-28 02:07:04,183 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-11-28 02:07:04,184 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-11-28 02:07:04,184 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-11-28 02:07:04,184 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-11-28 02:07:04,185 INFO L153 SettingsManager]: * Use memory slicer=true [2024-11-28 02:07:04,185 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-11-28 02:07:04,185 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-11-28 02:07:04,185 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-11-28 02:07:04,185 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-11-28 02:07:04,186 INFO L153 SettingsManager]: * Use SBE=true [2024-11-28 02:07:04,186 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-11-28 02:07:04,186 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-11-28 02:07:04,186 INFO L153 SettingsManager]: * sizeof long=4 [2024-11-28 02:07:04,186 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-11-28 02:07:04,186 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-11-28 02:07:04,187 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-11-28 02:07:04,187 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-11-28 02:07:04,187 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-11-28 02:07:04,187 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-11-28 02:07:04,187 INFO L153 SettingsManager]: * sizeof long double=12 [2024-11-28 02:07:04,187 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-11-28 02:07:04,187 INFO L153 SettingsManager]: * Behaviour of calls to undefined functions=OVERAPPROXIMATE_BEHAVIOUR [2024-11-28 02:07:04,188 INFO L153 SettingsManager]: * Use constant arrays=true [2024-11-28 02:07:04,188 INFO L151 SettingsManager]: Preferences of IcfgBuilder differ from their defaults: [2024-11-28 02:07:04,188 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-11-28 02:07:04,188 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-11-28 02:07:04,188 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-11-28 02:07:04,188 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-11-28 02:07:04,189 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-11-28 02:07:04,189 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-11-28 02:07:04,189 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-11-28 02:07:04,189 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-11-28 02:07:04,189 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-11-28 02:07:04,189 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-11-28 02:07:04,189 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-11-28 02:07:04,190 INFO L153 SettingsManager]: * Compute procedure contracts=false [2024-11-28 02:07:04,190 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-11-28 02:07:04,190 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-11-28 02:07:04,190 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-11-28 02:07:04,190 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-11-28 02:07:04,190 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-11-28 02:07:04,190 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-11-28 02:07:04,190 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-11-28 02:07:04,190 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_4c6a019f-02cd-4563-9ada-3009abc1415a/bin/uautomizer-verify-aQ6SnzHsRB 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 -> e66d74cf738883d82d8ab680e594f84e8947532df35a185c16ed9746f38b197c [2024-11-28 02:07:04,531 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-11-28 02:07:04,543 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-11-28 02:07:04,546 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-11-28 02:07:04,547 INFO L270 PluginConnector]: Initializing CDTParser... [2024-11-28 02:07:04,548 INFO L274 PluginConnector]: CDTParser initialized [2024-11-28 02:07:04,549 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4c6a019f-02cd-4563-9ada-3009abc1415a/bin/uautomizer-verify-aQ6SnzHsRB/../../sv-benchmarks/c/weaver/popl20-figure1-alt.wvr.c [2024-11-28 02:07:07,636 INFO L533 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4c6a019f-02cd-4563-9ada-3009abc1415a/bin/uautomizer-verify-aQ6SnzHsRB/data/7dcff9864/28d139a359294a809e573355e54a1619/FLAG70ac447e1 [2024-11-28 02:07:07,879 INFO L384 CDTParser]: Found 1 translation units. [2024-11-28 02:07:07,880 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4c6a019f-02cd-4563-9ada-3009abc1415a/sv-benchmarks/c/weaver/popl20-figure1-alt.wvr.c [2024-11-28 02:07:07,886 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4c6a019f-02cd-4563-9ada-3009abc1415a/bin/uautomizer-verify-aQ6SnzHsRB/data/7dcff9864/28d139a359294a809e573355e54a1619/FLAG70ac447e1 [2024-11-28 02:07:07,909 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4c6a019f-02cd-4563-9ada-3009abc1415a/bin/uautomizer-verify-aQ6SnzHsRB/data/7dcff9864/28d139a359294a809e573355e54a1619 [2024-11-28 02:07:07,912 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-11-28 02:07:07,913 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2024-11-28 02:07:07,914 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-11-28 02:07:07,914 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-11-28 02:07:07,921 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-11-28 02:07:07,922 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.11 02:07:07" (1/1) ... [2024-11-28 02:07:07,924 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1a3fac75 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 02:07:07, skipping insertion in model container [2024-11-28 02:07:07,924 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.11 02:07:07" (1/1) ... [2024-11-28 02:07:07,946 INFO L175 MainTranslator]: Built tables and reachable declarations [2024-11-28 02:07:08,131 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_4c6a019f-02cd-4563-9ada-3009abc1415a/sv-benchmarks/c/weaver/popl20-figure1-alt.wvr.c[1921,1934] [2024-11-28 02:07:08,135 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-28 02:07:08,146 INFO L200 MainTranslator]: Completed pre-run [2024-11-28 02:07:08,163 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_4c6a019f-02cd-4563-9ada-3009abc1415a/sv-benchmarks/c/weaver/popl20-figure1-alt.wvr.c[1921,1934] [2024-11-28 02:07:08,163 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-28 02:07:08,177 INFO L204 MainTranslator]: Completed translation [2024-11-28 02:07:08,178 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 02:07:08 WrapperNode [2024-11-28 02:07:08,178 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-11-28 02:07:08,179 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-11-28 02:07:08,179 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-11-28 02:07:08,179 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-11-28 02:07:08,186 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 02:07:08" (1/1) ... [2024-11-28 02:07:08,191 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 02:07:08" (1/1) ... [2024-11-28 02:07:08,209 INFO L138 Inliner]: procedures = 18, calls = 11, calls flagged for inlining = 5, calls inlined = 5, statements flattened = 65 [2024-11-28 02:07:08,210 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-11-28 02:07:08,210 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-11-28 02:07:08,211 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-11-28 02:07:08,212 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-11-28 02:07:08,221 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 02:07:08" (1/1) ... [2024-11-28 02:07:08,221 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 02:07:08" (1/1) ... [2024-11-28 02:07:08,222 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 02:07:08" (1/1) ... [2024-11-28 02:07:08,241 INFO L175 MemorySlicer]: Split 2 memory accesses to 1 slices as follows [2]. 100 percent of accesses are in the largest equivalence class. The 2 initializations are split as follows [2]. The 0 writes are split as follows [0]. [2024-11-28 02:07:08,242 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 02:07:08" (1/1) ... [2024-11-28 02:07:08,242 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 02:07:08" (1/1) ... [2024-11-28 02:07:08,248 INFO L184 PluginConnector]: Executing the observer ReplaceArrayAssignments from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 02:07:08" (1/1) ... [2024-11-28 02:07:08,251 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 02:07:08" (1/1) ... [2024-11-28 02:07:08,254 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 02:07:08" (1/1) ... [2024-11-28 02:07:08,259 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 02:07:08" (1/1) ... [2024-11-28 02:07:08,259 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 02:07:08" (1/1) ... [2024-11-28 02:07:08,261 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-11-28 02:07:08,265 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-11-28 02:07:08,265 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-11-28 02:07:08,265 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-11-28 02:07:08,266 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 02:07:08" (1/1) ... [2024-11-28 02:07:08,273 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-11-28 02:07:08,287 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4c6a019f-02cd-4563-9ada-3009abc1415a/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 02:07:08,301 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4c6a019f-02cd-4563-9ada-3009abc1415a/bin/uautomizer-verify-aQ6SnzHsRB/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (exit command is (exit), workingDir is null) [2024-11-28 02:07:08,304 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4c6a019f-02cd-4563-9ada-3009abc1415a/bin/uautomizer-verify-aQ6SnzHsRB/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Waiting until timeout for monitored process [2024-11-28 02:07:08,331 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-11-28 02:07:08,331 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2024-11-28 02:07:08,332 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2024-11-28 02:07:08,332 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2024-11-28 02:07:08,332 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2024-11-28 02:07:08,332 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-11-28 02:07:08,332 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-11-28 02:07:08,332 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-11-28 02:07:08,333 WARN L203 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement. [2024-11-28 02:07:08,408 INFO L234 CfgBuilder]: Building ICFG [2024-11-28 02:07:08,410 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2024-11-28 02:07:08,600 INFO L279 CfgBuilder]: Omitted future-live optimization because the input is a concurrent program. [2024-11-28 02:07:08,601 INFO L283 CfgBuilder]: Performing block encoding [2024-11-28 02:07:08,738 INFO L307 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-11-28 02:07:08,738 INFO L312 CfgBuilder]: Removed 2 assume(true) statements. [2024-11-28 02:07:08,739 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.11 02:07:08 BoogieIcfgContainer [2024-11-28 02:07:08,739 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-11-28 02:07:08,745 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-11-28 02:07:08,746 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-11-28 02:07:08,755 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-11-28 02:07:08,755 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 28.11 02:07:07" (1/3) ... [2024-11-28 02:07:08,756 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@645996ec and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 28.11 02:07:08, skipping insertion in model container [2024-11-28 02:07:08,756 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 02:07:08" (2/3) ... [2024-11-28 02:07:08,757 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@645996ec and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 28.11 02:07:08, skipping insertion in model container [2024-11-28 02:07:08,757 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.11 02:07:08" (3/3) ... [2024-11-28 02:07:08,758 INFO L128 eAbstractionObserver]: Analyzing ICFG popl20-figure1-alt.wvr.c [2024-11-28 02:07:08,775 INFO L216 ceAbstractionStarter]: Automizer settings: Hoare:LoopHeads NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-11-28 02:07:08,777 INFO L151 ceAbstractionStarter]: Applying trace abstraction to ICFG popl20-figure1-alt.wvr.c that has 3 procedures, 21 locations, 1 initial locations, 2 loop locations, and 1 error locations. [2024-11-28 02:07:08,777 INFO L491 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2024-11-28 02:07:08,835 INFO L143 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2024-11-28 02:07:08,879 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 27 places, 22 transitions, 58 flow [2024-11-28 02:07:08,919 INFO L124 PetriNetUnfolderBase]: 2/20 cut-off events. [2024-11-28 02:07:08,924 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2024-11-28 02:07:08,932 INFO L83 FinitePrefix]: Finished finitePrefix Result has 29 conditions, 20 events. 2/20 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 26 event pairs, 0 based on Foata normal form. 0/17 useless extension candidates. Maximal degree in co-relation 15. Up to 2 conditions per place. [2024-11-28 02:07:08,932 INFO L82 GeneralOperation]: Start removeDead. Operand has 27 places, 22 transitions, 58 flow [2024-11-28 02:07:08,939 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 24 places, 19 transitions, 50 flow [2024-11-28 02:07:08,956 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-11-28 02:07:08,975 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;@27cfea72, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-11-28 02:07:08,975 INFO L334 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2024-11-28 02:07:08,998 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2024-11-28 02:07:08,998 INFO L124 PetriNetUnfolderBase]: 2/18 cut-off events. [2024-11-28 02:07:08,999 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2024-11-28 02:07:08,999 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-28 02:07:08,999 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 02:07:09,000 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-11-28 02:07:09,011 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 02:07:09,011 INFO L85 PathProgramCache]: Analyzing trace with hash 2077934963, now seen corresponding path program 1 times [2024-11-28 02:07:09,019 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 02:07:09,019 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1510773411] [2024-11-28 02:07:09,019 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-28 02:07:09,020 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 02:07:09,155 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 02:07:09,863 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-28 02:07:09,863 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 02:07:09,863 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1510773411] [2024-11-28 02:07:09,864 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1510773411] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-28 02:07:09,864 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-28 02:07:09,865 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-11-28 02:07:09,868 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2027227110] [2024-11-28 02:07:09,869 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-28 02:07:09,877 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-11-28 02:07:09,882 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 02:07:09,913 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-11-28 02:07:09,914 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2024-11-28 02:07:09,937 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 22 [2024-11-28 02:07:09,940 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 24 places, 19 transitions, 50 flow. Second operand has 7 states, 7 states have (on average 5.714285714285714) internal successors, (40), 7 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 02:07:09,940 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-28 02:07:09,940 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 22 [2024-11-28 02:07:09,943 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-28 02:07:10,204 INFO L124 PetriNetUnfolderBase]: 87/185 cut-off events. [2024-11-28 02:07:10,204 INFO L125 PetriNetUnfolderBase]: For 26/26 co-relation queries the response was YES. [2024-11-28 02:07:10,205 INFO L83 FinitePrefix]: Finished finitePrefix Result has 383 conditions, 185 events. 87/185 cut-off events. For 26/26 co-relation queries the response was YES. Maximal size of possible extension queue 17. Compared 640 event pairs, 12 based on Foata normal form. 1/179 useless extension candidates. Maximal degree in co-relation 312. Up to 108 conditions per place. [2024-11-28 02:07:10,209 INFO L140 encePairwiseOnDemand]: 14/22 looper letters, 30 selfloop transitions, 4 changer transitions 9/45 dead transitions. [2024-11-28 02:07:10,209 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 30 places, 45 transitions, 212 flow [2024-11-28 02:07:10,211 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-11-28 02:07:10,215 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-11-28 02:07:10,226 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 76 transitions. [2024-11-28 02:07:10,230 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.4935064935064935 [2024-11-28 02:07:10,232 INFO L175 Difference]: Start difference. First operand has 24 places, 19 transitions, 50 flow. Second operand 7 states and 76 transitions. [2024-11-28 02:07:10,233 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 30 places, 45 transitions, 212 flow [2024-11-28 02:07:10,242 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 26 places, 45 transitions, 188 flow, removed 0 selfloop flow, removed 4 redundant places. [2024-11-28 02:07:10,246 INFO L231 Difference]: Finished difference. Result has 31 places, 21 transitions, 78 flow [2024-11-28 02:07:10,249 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=22, PETRI_DIFFERENCE_MINUEND_FLOW=42, PETRI_DIFFERENCE_MINUEND_PLACES=20, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=19, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=15, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=78, PETRI_PLACES=31, PETRI_TRANSITIONS=21} [2024-11-28 02:07:10,255 INFO L279 CegarLoopForPetriNet]: 24 programPoint places, 7 predicate places. [2024-11-28 02:07:10,255 INFO L471 AbstractCegarLoop]: Abstraction has has 31 places, 21 transitions, 78 flow [2024-11-28 02:07:10,255 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 5.714285714285714) internal successors, (40), 7 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 02:07:10,255 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-28 02:07:10,255 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 02:07:10,256 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-11-28 02:07:10,256 INFO L396 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-11-28 02:07:10,256 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 02:07:10,257 INFO L85 PathProgramCache]: Analyzing trace with hash 2116570683, now seen corresponding path program 2 times [2024-11-28 02:07:10,257 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 02:07:10,257 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1822467858] [2024-11-28 02:07:10,257 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-28 02:07:10,257 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 02:07:10,293 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2024-11-28 02:07:10,294 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 02:07:10,737 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-28 02:07:10,737 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 02:07:10,737 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1822467858] [2024-11-28 02:07:10,737 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1822467858] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-28 02:07:10,737 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-28 02:07:10,738 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-11-28 02:07:10,738 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1107444667] [2024-11-28 02:07:10,738 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-28 02:07:10,739 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-11-28 02:07:10,739 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 02:07:10,740 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-11-28 02:07:10,740 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2024-11-28 02:07:10,758 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 22 [2024-11-28 02:07:10,758 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 31 places, 21 transitions, 78 flow. Second operand has 7 states, 7 states have (on average 5.714285714285714) internal successors, (40), 7 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 02:07:10,759 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-28 02:07:10,759 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 22 [2024-11-28 02:07:10,759 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-28 02:07:10,949 INFO L124 PetriNetUnfolderBase]: 85/178 cut-off events. [2024-11-28 02:07:10,950 INFO L125 PetriNetUnfolderBase]: For 134/134 co-relation queries the response was YES. [2024-11-28 02:07:10,951 INFO L83 FinitePrefix]: Finished finitePrefix Result has 493 conditions, 178 events. 85/178 cut-off events. For 134/134 co-relation queries the response was YES. Maximal size of possible extension queue 16. Compared 581 event pairs, 16 based on Foata normal form. 1/178 useless extension candidates. Maximal degree in co-relation 477. Up to 110 conditions per place. [2024-11-28 02:07:10,952 INFO L140 encePairwiseOnDemand]: 15/22 looper letters, 29 selfloop transitions, 8 changer transitions 6/45 dead transitions. [2024-11-28 02:07:10,952 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 35 places, 45 transitions, 254 flow [2024-11-28 02:07:10,953 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-11-28 02:07:10,953 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-11-28 02:07:10,954 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 72 transitions. [2024-11-28 02:07:10,954 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.4675324675324675 [2024-11-28 02:07:10,954 INFO L175 Difference]: Start difference. First operand has 31 places, 21 transitions, 78 flow. Second operand 7 states and 72 transitions. [2024-11-28 02:07:10,954 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 35 places, 45 transitions, 254 flow [2024-11-28 02:07:10,956 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 31 places, 45 transitions, 235 flow, removed 5 selfloop flow, removed 4 redundant places. [2024-11-28 02:07:10,958 INFO L231 Difference]: Finished difference. Result has 36 places, 27 transitions, 128 flow [2024-11-28 02:07:10,958 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=22, PETRI_DIFFERENCE_MINUEND_FLOW=68, PETRI_DIFFERENCE_MINUEND_PLACES=25, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=21, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=16, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=128, PETRI_PLACES=36, PETRI_TRANSITIONS=27} [2024-11-28 02:07:10,959 INFO L279 CegarLoopForPetriNet]: 24 programPoint places, 12 predicate places. [2024-11-28 02:07:10,959 INFO L471 AbstractCegarLoop]: Abstraction has has 36 places, 27 transitions, 128 flow [2024-11-28 02:07:10,959 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 5.714285714285714) internal successors, (40), 7 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 02:07:10,959 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-28 02:07:10,959 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 02:07:10,960 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-11-28 02:07:10,960 INFO L396 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-11-28 02:07:10,960 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 02:07:10,961 INFO L85 PathProgramCache]: Analyzing trace with hash 1754244973, now seen corresponding path program 3 times [2024-11-28 02:07:10,961 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 02:07:10,961 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [901270638] [2024-11-28 02:07:10,961 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-28 02:07:10,961 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 02:07:10,979 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 1 check-sat command(s) [2024-11-28 02:07:10,980 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 02:07:11,345 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-28 02:07:11,346 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 02:07:11,346 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [901270638] [2024-11-28 02:07:11,346 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [901270638] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-28 02:07:11,346 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-28 02:07:11,347 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-11-28 02:07:11,347 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [747435674] [2024-11-28 02:07:11,347 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-28 02:07:11,347 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-11-28 02:07:11,348 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 02:07:11,348 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-11-28 02:07:11,348 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=26, Unknown=0, NotChecked=0, Total=42 [2024-11-28 02:07:11,365 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 22 [2024-11-28 02:07:11,365 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 36 places, 27 transitions, 128 flow. Second operand has 7 states, 7 states have (on average 5.714285714285714) internal successors, (40), 7 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 02:07:11,365 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-28 02:07:11,366 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 22 [2024-11-28 02:07:11,366 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-28 02:07:11,579 INFO L124 PetriNetUnfolderBase]: 90/192 cut-off events. [2024-11-28 02:07:11,579 INFO L125 PetriNetUnfolderBase]: For 183/183 co-relation queries the response was YES. [2024-11-28 02:07:11,580 INFO L83 FinitePrefix]: Finished finitePrefix Result has 581 conditions, 192 events. 90/192 cut-off events. For 183/183 co-relation queries the response was YES. Maximal size of possible extension queue 18. Compared 677 event pairs, 18 based on Foata normal form. 1/193 useless extension candidates. Maximal degree in co-relation 562. Up to 112 conditions per place. [2024-11-28 02:07:11,582 INFO L140 encePairwiseOnDemand]: 15/22 looper letters, 28 selfloop transitions, 11 changer transitions 7/48 dead transitions. [2024-11-28 02:07:11,582 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 41 places, 48 transitions, 300 flow [2024-11-28 02:07:11,583 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-11-28 02:07:11,583 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-11-28 02:07:11,583 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 71 transitions. [2024-11-28 02:07:11,584 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.461038961038961 [2024-11-28 02:07:11,584 INFO L175 Difference]: Start difference. First operand has 36 places, 27 transitions, 128 flow. Second operand 7 states and 71 transitions. [2024-11-28 02:07:11,584 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 41 places, 48 transitions, 300 flow [2024-11-28 02:07:11,586 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 39 places, 48 transitions, 290 flow, removed 2 selfloop flow, removed 2 redundant places. [2024-11-28 02:07:11,587 INFO L231 Difference]: Finished difference. Result has 43 places, 30 transitions, 183 flow [2024-11-28 02:07:11,587 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=22, PETRI_DIFFERENCE_MINUEND_FLOW=121, PETRI_DIFFERENCE_MINUEND_PLACES=33, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=27, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=8, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=17, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=183, PETRI_PLACES=43, PETRI_TRANSITIONS=30} [2024-11-28 02:07:11,588 INFO L279 CegarLoopForPetriNet]: 24 programPoint places, 19 predicate places. [2024-11-28 02:07:11,588 INFO L471 AbstractCegarLoop]: Abstraction has has 43 places, 30 transitions, 183 flow [2024-11-28 02:07:11,588 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 5.714285714285714) internal successors, (40), 7 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 02:07:11,588 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-28 02:07:11,589 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 02:07:11,589 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2024-11-28 02:07:11,589 INFO L396 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-11-28 02:07:11,589 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 02:07:11,590 INFO L85 PathProgramCache]: Analyzing trace with hash 260888119, now seen corresponding path program 4 times [2024-11-28 02:07:11,590 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 02:07:11,590 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [655317922] [2024-11-28 02:07:11,590 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-11-28 02:07:11,590 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 02:07:11,603 INFO L229 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-11-28 02:07:11,606 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 02:07:11,852 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-28 02:07:11,852 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 02:07:11,852 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [655317922] [2024-11-28 02:07:11,852 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [655317922] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-28 02:07:11,852 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-28 02:07:11,852 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-11-28 02:07:11,852 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [577200362] [2024-11-28 02:07:11,853 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-28 02:07:11,853 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-11-28 02:07:11,853 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 02:07:11,853 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-11-28 02:07:11,853 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2024-11-28 02:07:11,868 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 22 [2024-11-28 02:07:11,869 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 43 places, 30 transitions, 183 flow. Second operand has 7 states, 7 states have (on average 5.714285714285714) internal successors, (40), 7 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 02:07:11,869 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-28 02:07:11,869 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 22 [2024-11-28 02:07:11,869 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-28 02:07:12,129 INFO L124 PetriNetUnfolderBase]: 88/189 cut-off events. [2024-11-28 02:07:12,129 INFO L125 PetriNetUnfolderBase]: For 322/322 co-relation queries the response was YES. [2024-11-28 02:07:12,130 INFO L83 FinitePrefix]: Finished finitePrefix Result has 651 conditions, 189 events. 88/189 cut-off events. For 322/322 co-relation queries the response was YES. Maximal size of possible extension queue 19. Compared 666 event pairs, 26 based on Foata normal form. 1/189 useless extension candidates. Maximal degree in co-relation 625. Up to 114 conditions per place. [2024-11-28 02:07:12,131 INFO L140 encePairwiseOnDemand]: 15/22 looper letters, 32 selfloop transitions, 12 changer transitions 6/52 dead transitions. [2024-11-28 02:07:12,134 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 47 places, 52 transitions, 388 flow [2024-11-28 02:07:12,135 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-11-28 02:07:12,135 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-11-28 02:07:12,135 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 73 transitions. [2024-11-28 02:07:12,136 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.474025974025974 [2024-11-28 02:07:12,136 INFO L175 Difference]: Start difference. First operand has 43 places, 30 transitions, 183 flow. Second operand 7 states and 73 transitions. [2024-11-28 02:07:12,136 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 47 places, 52 transitions, 388 flow [2024-11-28 02:07:12,142 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 42 places, 52 transitions, 348 flow, removed 7 selfloop flow, removed 5 redundant places. [2024-11-28 02:07:12,143 INFO L231 Difference]: Finished difference. Result has 46 places, 33 transitions, 228 flow [2024-11-28 02:07:12,143 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=22, PETRI_DIFFERENCE_MINUEND_FLOW=159, PETRI_DIFFERENCE_MINUEND_PLACES=36, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=30, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=9, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=19, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=228, PETRI_PLACES=46, PETRI_TRANSITIONS=33} [2024-11-28 02:07:12,148 INFO L279 CegarLoopForPetriNet]: 24 programPoint places, 22 predicate places. [2024-11-28 02:07:12,148 INFO L471 AbstractCegarLoop]: Abstraction has has 46 places, 33 transitions, 228 flow [2024-11-28 02:07:12,148 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 5.714285714285714) internal successors, (40), 7 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 02:07:12,148 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-28 02:07:12,148 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 02:07:12,148 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2024-11-28 02:07:12,149 INFO L396 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-11-28 02:07:12,149 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 02:07:12,149 INFO L85 PathProgramCache]: Analyzing trace with hash 1886517013, now seen corresponding path program 5 times [2024-11-28 02:07:12,149 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 02:07:12,150 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1179856220] [2024-11-28 02:07:12,150 INFO L95 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-11-28 02:07:12,150 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 02:07:12,169 INFO L229 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2024-11-28 02:07:12,169 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 02:07:12,454 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-28 02:07:12,454 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 02:07:12,454 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1179856220] [2024-11-28 02:07:12,454 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1179856220] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-28 02:07:12,454 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-28 02:07:12,454 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-11-28 02:07:12,454 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1298764459] [2024-11-28 02:07:12,454 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-28 02:07:12,456 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-11-28 02:07:12,457 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 02:07:12,458 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-11-28 02:07:12,458 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2024-11-28 02:07:12,477 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 22 [2024-11-28 02:07:12,477 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 46 places, 33 transitions, 228 flow. Second operand has 7 states, 7 states have (on average 5.714285714285714) internal successors, (40), 7 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 02:07:12,478 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-28 02:07:12,478 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 22 [2024-11-28 02:07:12,478 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-28 02:07:12,651 INFO L124 PetriNetUnfolderBase]: 86/183 cut-off events. [2024-11-28 02:07:12,651 INFO L125 PetriNetUnfolderBase]: For 308/308 co-relation queries the response was YES. [2024-11-28 02:07:12,653 INFO L83 FinitePrefix]: Finished finitePrefix Result has 647 conditions, 183 events. 86/183 cut-off events. For 308/308 co-relation queries the response was YES. Maximal size of possible extension queue 19. Compared 622 event pairs, 27 based on Foata normal form. 1/184 useless extension candidates. Maximal degree in co-relation 623. Up to 114 conditions per place. [2024-11-28 02:07:12,654 INFO L140 encePairwiseOnDemand]: 15/22 looper letters, 29 selfloop transitions, 13 changer transitions 5/49 dead transitions. [2024-11-28 02:07:12,654 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 51 places, 49 transitions, 379 flow [2024-11-28 02:07:12,656 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-11-28 02:07:12,656 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-11-28 02:07:12,657 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 70 transitions. [2024-11-28 02:07:12,657 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.45454545454545453 [2024-11-28 02:07:12,657 INFO L175 Difference]: Start difference. First operand has 46 places, 33 transitions, 228 flow. Second operand 7 states and 70 transitions. [2024-11-28 02:07:12,657 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 51 places, 49 transitions, 379 flow [2024-11-28 02:07:12,663 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 48 places, 49 transitions, 360 flow, removed 4 selfloop flow, removed 3 redundant places. [2024-11-28 02:07:12,664 INFO L231 Difference]: Finished difference. Result has 49 places, 32 transitions, 232 flow [2024-11-28 02:07:12,665 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=22, PETRI_DIFFERENCE_MINUEND_FLOW=213, PETRI_DIFFERENCE_MINUEND_PLACES=42, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=33, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=13, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=20, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=232, PETRI_PLACES=49, PETRI_TRANSITIONS=32} [2024-11-28 02:07:12,666 INFO L279 CegarLoopForPetriNet]: 24 programPoint places, 25 predicate places. [2024-11-28 02:07:12,668 INFO L471 AbstractCegarLoop]: Abstraction has has 49 places, 32 transitions, 232 flow [2024-11-28 02:07:12,668 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 5.714285714285714) internal successors, (40), 7 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 02:07:12,668 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-28 02:07:12,668 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 02:07:12,668 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2024-11-28 02:07:12,671 INFO L396 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-11-28 02:07:12,672 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 02:07:12,672 INFO L85 PathProgramCache]: Analyzing trace with hash 399416269, now seen corresponding path program 6 times [2024-11-28 02:07:12,672 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 02:07:12,672 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1545771719] [2024-11-28 02:07:12,672 INFO L95 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2024-11-28 02:07:12,672 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 02:07:12,688 INFO L229 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 1 check-sat command(s) [2024-11-28 02:07:12,689 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 02:07:12,977 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-28 02:07:12,977 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 02:07:12,977 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1545771719] [2024-11-28 02:07:12,977 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1545771719] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-28 02:07:12,977 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-28 02:07:12,978 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-11-28 02:07:12,978 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [862058767] [2024-11-28 02:07:12,978 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-28 02:07:12,978 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-11-28 02:07:12,978 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 02:07:12,979 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-11-28 02:07:12,979 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=26, Unknown=0, NotChecked=0, Total=42 [2024-11-28 02:07:12,994 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 22 [2024-11-28 02:07:12,994 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 49 places, 32 transitions, 232 flow. Second operand has 7 states, 7 states have (on average 5.714285714285714) internal successors, (40), 7 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 02:07:12,994 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-28 02:07:12,995 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 22 [2024-11-28 02:07:12,995 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-28 02:07:13,161 INFO L124 PetriNetUnfolderBase]: 82/165 cut-off events. [2024-11-28 02:07:13,161 INFO L125 PetriNetUnfolderBase]: For 367/367 co-relation queries the response was YES. [2024-11-28 02:07:13,162 INFO L83 FinitePrefix]: Finished finitePrefix Result has 599 conditions, 165 events. 82/165 cut-off events. For 367/367 co-relation queries the response was YES. Maximal size of possible extension queue 16. Compared 515 event pairs, 26 based on Foata normal form. 1/165 useless extension candidates. Maximal degree in co-relation 579. Up to 114 conditions per place. [2024-11-28 02:07:13,163 INFO L140 encePairwiseOnDemand]: 15/22 looper letters, 23 selfloop transitions, 13 changer transitions 6/44 dead transitions. [2024-11-28 02:07:13,163 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 54 places, 44 transitions, 365 flow [2024-11-28 02:07:13,164 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-11-28 02:07:13,164 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-11-28 02:07:13,165 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 66 transitions. [2024-11-28 02:07:13,165 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.42857142857142855 [2024-11-28 02:07:13,165 INFO L175 Difference]: Start difference. First operand has 49 places, 32 transitions, 232 flow. Second operand 7 states and 66 transitions. [2024-11-28 02:07:13,165 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 54 places, 44 transitions, 365 flow [2024-11-28 02:07:13,167 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 48 places, 44 transitions, 324 flow, removed 3 selfloop flow, removed 6 redundant places. [2024-11-28 02:07:13,168 INFO L231 Difference]: Finished difference. Result has 49 places, 32 transitions, 220 flow [2024-11-28 02:07:13,169 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=22, PETRI_DIFFERENCE_MINUEND_FLOW=194, PETRI_DIFFERENCE_MINUEND_PLACES=42, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=32, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=12, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=20, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=220, PETRI_PLACES=49, PETRI_TRANSITIONS=32} [2024-11-28 02:07:13,169 INFO L279 CegarLoopForPetriNet]: 24 programPoint places, 25 predicate places. [2024-11-28 02:07:13,170 INFO L471 AbstractCegarLoop]: Abstraction has has 49 places, 32 transitions, 220 flow [2024-11-28 02:07:13,170 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 5.714285714285714) internal successors, (40), 7 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 02:07:13,170 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-28 02:07:13,170 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 02:07:13,170 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2024-11-28 02:07:13,170 INFO L396 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-11-28 02:07:13,171 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 02:07:13,171 INFO L85 PathProgramCache]: Analyzing trace with hash -1868782049, now seen corresponding path program 1 times [2024-11-28 02:07:13,171 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 02:07:13,171 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1591960418] [2024-11-28 02:07:13,171 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-28 02:07:13,172 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 02:07:13,182 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 02:07:13,503 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-28 02:07:13,504 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 02:07:13,504 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1591960418] [2024-11-28 02:07:13,504 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1591960418] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-28 02:07:13,504 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1155683695] [2024-11-28 02:07:13,504 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-28 02:07:13,504 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 02:07:13,504 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4c6a019f-02cd-4563-9ada-3009abc1415a/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 02:07:13,508 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4c6a019f-02cd-4563-9ada-3009abc1415a/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 02:07:13,510 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4c6a019f-02cd-4563-9ada-3009abc1415a/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2024-11-28 02:07:13,566 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 02:07:13,572 INFO L256 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 15 conjuncts are in the unsatisfiable core [2024-11-28 02:07:13,579 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 02:07:13,912 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-28 02:07:13,912 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-28 02:07:14,194 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-28 02:07:14,194 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1155683695] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-28 02:07:14,194 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-28 02:07:14,194 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 23 [2024-11-28 02:07:14,194 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1330819431] [2024-11-28 02:07:14,194 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-28 02:07:14,195 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2024-11-28 02:07:14,195 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 02:07:14,195 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2024-11-28 02:07:14,196 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=118, Invalid=434, Unknown=0, NotChecked=0, Total=552 [2024-11-28 02:07:14,201 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 22 [2024-11-28 02:07:14,201 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 49 places, 32 transitions, 220 flow. Second operand has 24 states, 24 states have (on average 4.75) internal successors, (114), 24 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 02:07:14,201 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-28 02:07:14,201 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 22 [2024-11-28 02:07:14,202 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-28 02:07:15,771 INFO L124 PetriNetUnfolderBase]: 318/613 cut-off events. [2024-11-28 02:07:15,772 INFO L125 PetriNetUnfolderBase]: For 588/588 co-relation queries the response was YES. [2024-11-28 02:07:15,773 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1714 conditions, 613 events. 318/613 cut-off events. For 588/588 co-relation queries the response was YES. Maximal size of possible extension queue 40. Compared 2654 event pairs, 14 based on Foata normal form. 17/630 useless extension candidates. Maximal degree in co-relation 1671. Up to 144 conditions per place. [2024-11-28 02:07:15,777 INFO L140 encePairwiseOnDemand]: 10/22 looper letters, 125 selfloop transitions, 63 changer transitions 8/197 dead transitions. [2024-11-28 02:07:15,777 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 79 places, 197 transitions, 1155 flow [2024-11-28 02:07:15,777 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2024-11-28 02:07:15,777 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2024-11-28 02:07:15,779 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 294 transitions. [2024-11-28 02:07:15,780 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.393048128342246 [2024-11-28 02:07:15,780 INFO L175 Difference]: Start difference. First operand has 49 places, 32 transitions, 220 flow. Second operand 34 states and 294 transitions. [2024-11-28 02:07:15,780 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 79 places, 197 transitions, 1155 flow [2024-11-28 02:07:15,787 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 71 places, 197 transitions, 1071 flow, removed 25 selfloop flow, removed 8 redundant places. [2024-11-28 02:07:15,790 INFO L231 Difference]: Finished difference. Result has 78 places, 89 transitions, 546 flow [2024-11-28 02:07:15,790 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=22, PETRI_DIFFERENCE_MINUEND_FLOW=179, PETRI_DIFFERENCE_MINUEND_PLACES=38, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=32, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=16, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=13, PETRI_DIFFERENCE_SUBTRAHEND_STATES=34, PETRI_FLOW=546, PETRI_PLACES=78, PETRI_TRANSITIONS=89} [2024-11-28 02:07:15,791 INFO L279 CegarLoopForPetriNet]: 24 programPoint places, 54 predicate places. [2024-11-28 02:07:15,791 INFO L471 AbstractCegarLoop]: Abstraction has has 78 places, 89 transitions, 546 flow [2024-11-28 02:07:15,792 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 4.75) internal successors, (114), 24 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 02:07:15,792 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-28 02:07:15,793 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 02:07:15,803 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4c6a019f-02cd-4563-9ada-3009abc1415a/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2024-11-28 02:07:15,997 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4c6a019f-02cd-4563-9ada-3009abc1415a/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 02:07:15,997 INFO L396 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-11-28 02:07:15,998 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 02:07:15,998 INFO L85 PathProgramCache]: Analyzing trace with hash -499029501, now seen corresponding path program 2 times [2024-11-28 02:07:15,998 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 02:07:15,998 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1406654970] [2024-11-28 02:07:15,998 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-28 02:07:15,999 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 02:07:16,011 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2024-11-28 02:07:16,012 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 02:07:16,303 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-28 02:07:16,303 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 02:07:16,303 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1406654970] [2024-11-28 02:07:16,303 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1406654970] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-28 02:07:16,303 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-28 02:07:16,304 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-11-28 02:07:16,304 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1303871071] [2024-11-28 02:07:16,304 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-28 02:07:16,304 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-11-28 02:07:16,304 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 02:07:16,306 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-11-28 02:07:16,306 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2024-11-28 02:07:16,323 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 22 [2024-11-28 02:07:16,324 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 78 places, 89 transitions, 546 flow. Second operand has 10 states, 10 states have (on average 4.5) internal successors, (45), 10 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 02:07:16,324 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-28 02:07:16,324 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 22 [2024-11-28 02:07:16,324 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-28 02:07:16,687 INFO L124 PetriNetUnfolderBase]: 326/627 cut-off events. [2024-11-28 02:07:16,687 INFO L125 PetriNetUnfolderBase]: For 837/837 co-relation queries the response was YES. [2024-11-28 02:07:16,690 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2194 conditions, 627 events. 326/627 cut-off events. For 837/837 co-relation queries the response was YES. Maximal size of possible extension queue 38. Compared 2683 event pairs, 60 based on Foata normal form. 1/628 useless extension candidates. Maximal degree in co-relation 2141. Up to 516 conditions per place. [2024-11-28 02:07:16,693 INFO L140 encePairwiseOnDemand]: 12/22 looper letters, 95 selfloop transitions, 21 changer transitions 4/121 dead transitions. [2024-11-28 02:07:16,693 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 85 places, 121 transitions, 922 flow [2024-11-28 02:07:16,694 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-11-28 02:07:16,694 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-11-28 02:07:16,694 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 88 transitions. [2024-11-28 02:07:16,694 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.4 [2024-11-28 02:07:16,695 INFO L175 Difference]: Start difference. First operand has 78 places, 89 transitions, 546 flow. Second operand 10 states and 88 transitions. [2024-11-28 02:07:16,695 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 85 places, 121 transitions, 922 flow [2024-11-28 02:07:16,702 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 81 places, 121 transitions, 817 flow, removed 46 selfloop flow, removed 4 redundant places. [2024-11-28 02:07:16,704 INFO L231 Difference]: Finished difference. Result has 85 places, 96 transitions, 554 flow [2024-11-28 02:07:16,705 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=22, PETRI_DIFFERENCE_MINUEND_FLOW=449, PETRI_DIFFERENCE_MINUEND_PLACES=72, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=89, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=14, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=72, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=554, PETRI_PLACES=85, PETRI_TRANSITIONS=96} [2024-11-28 02:07:16,705 INFO L279 CegarLoopForPetriNet]: 24 programPoint places, 61 predicate places. [2024-11-28 02:07:16,706 INFO L471 AbstractCegarLoop]: Abstraction has has 85 places, 96 transitions, 554 flow [2024-11-28 02:07:16,706 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 4.5) internal successors, (45), 10 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 02:07:16,706 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-28 02:07:16,706 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 02:07:16,706 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2024-11-28 02:07:16,706 INFO L396 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-11-28 02:07:16,707 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 02:07:16,707 INFO L85 PathProgramCache]: Analyzing trace with hash 225479401, now seen corresponding path program 3 times [2024-11-28 02:07:16,707 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 02:07:16,707 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1584079266] [2024-11-28 02:07:16,707 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-28 02:07:16,708 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 02:07:16,717 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2024-11-28 02:07:16,717 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 02:07:16,959 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-28 02:07:16,959 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 02:07:16,959 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1584079266] [2024-11-28 02:07:16,960 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1584079266] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-28 02:07:16,960 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [155053828] [2024-11-28 02:07:16,960 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-28 02:07:16,960 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 02:07:16,960 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4c6a019f-02cd-4563-9ada-3009abc1415a/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 02:07:16,961 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4c6a019f-02cd-4563-9ada-3009abc1415a/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 02:07:16,963 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4c6a019f-02cd-4563-9ada-3009abc1415a/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2024-11-28 02:07:17,011 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2024-11-28 02:07:17,011 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 02:07:17,012 INFO L256 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 15 conjuncts are in the unsatisfiable core [2024-11-28 02:07:17,013 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 02:07:17,237 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-28 02:07:17,237 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-28 02:07:17,464 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-28 02:07:17,465 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [155053828] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-28 02:07:17,465 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-28 02:07:17,465 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 23 [2024-11-28 02:07:17,465 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [938474194] [2024-11-28 02:07:17,465 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-28 02:07:17,465 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2024-11-28 02:07:17,466 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 02:07:17,466 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2024-11-28 02:07:17,466 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=112, Invalid=440, Unknown=0, NotChecked=0, Total=552 [2024-11-28 02:07:17,474 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 22 [2024-11-28 02:07:17,475 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 85 places, 96 transitions, 554 flow. Second operand has 24 states, 24 states have (on average 4.75) internal successors, (114), 24 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 02:07:17,475 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-28 02:07:17,475 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 22 [2024-11-28 02:07:17,475 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-28 02:07:20,274 INFO L124 PetriNetUnfolderBase]: 561/1071 cut-off events. [2024-11-28 02:07:20,275 INFO L125 PetriNetUnfolderBase]: For 1515/1515 co-relation queries the response was YES. [2024-11-28 02:07:20,278 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3585 conditions, 1071 events. 561/1071 cut-off events. For 1515/1515 co-relation queries the response was YES. Maximal size of possible extension queue 71. Compared 5349 event pairs, 17 based on Foata normal form. 2/1027 useless extension candidates. Maximal degree in co-relation 3554. Up to 190 conditions per place. [2024-11-28 02:07:20,284 INFO L140 encePairwiseOnDemand]: 9/22 looper letters, 164 selfloop transitions, 172 changer transitions 8/345 dead transitions. [2024-11-28 02:07:20,284 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 141 places, 345 transitions, 2325 flow [2024-11-28 02:07:20,284 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 58 states. [2024-11-28 02:07:20,284 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 58 states. [2024-11-28 02:07:20,287 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 475 transitions. [2024-11-28 02:07:20,287 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.3722570532915361 [2024-11-28 02:07:20,287 INFO L175 Difference]: Start difference. First operand has 85 places, 96 transitions, 554 flow. Second operand 58 states and 475 transitions. [2024-11-28 02:07:20,288 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 141 places, 345 transitions, 2325 flow [2024-11-28 02:07:20,299 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 137 places, 345 transitions, 2288 flow, removed 8 selfloop flow, removed 4 redundant places. [2024-11-28 02:07:20,306 INFO L231 Difference]: Finished difference. Result has 156 places, 201 transitions, 1578 flow [2024-11-28 02:07:20,306 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=22, PETRI_DIFFERENCE_MINUEND_FLOW=524, PETRI_DIFFERENCE_MINUEND_PLACES=80, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=96, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=75, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=12, PETRI_DIFFERENCE_SUBTRAHEND_STATES=58, PETRI_FLOW=1578, PETRI_PLACES=156, PETRI_TRANSITIONS=201} [2024-11-28 02:07:20,307 INFO L279 CegarLoopForPetriNet]: 24 programPoint places, 132 predicate places. [2024-11-28 02:07:20,309 INFO L471 AbstractCegarLoop]: Abstraction has has 156 places, 201 transitions, 1578 flow [2024-11-28 02:07:20,309 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 4.75) internal successors, (114), 24 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 02:07:20,309 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-28 02:07:20,309 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 02:07:20,318 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4c6a019f-02cd-4563-9ada-3009abc1415a/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2024-11-28 02:07:20,513 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4c6a019f-02cd-4563-9ada-3009abc1415a/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 02:07:20,513 INFO L396 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-11-28 02:07:20,514 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 02:07:20,514 INFO L85 PathProgramCache]: Analyzing trace with hash 364007551, now seen corresponding path program 4 times [2024-11-28 02:07:20,514 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 02:07:20,514 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [47478991] [2024-11-28 02:07:20,514 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-11-28 02:07:20,514 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 02:07:20,524 INFO L229 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-11-28 02:07:20,524 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 02:07:20,767 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-28 02:07:20,767 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 02:07:20,767 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [47478991] [2024-11-28 02:07:20,767 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [47478991] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-28 02:07:20,767 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1349623918] [2024-11-28 02:07:20,767 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-11-28 02:07:20,767 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 02:07:20,767 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4c6a019f-02cd-4563-9ada-3009abc1415a/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 02:07:20,773 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4c6a019f-02cd-4563-9ada-3009abc1415a/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 02:07:20,774 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4c6a019f-02cd-4563-9ada-3009abc1415a/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2024-11-28 02:07:20,822 INFO L229 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-11-28 02:07:20,822 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 02:07:20,823 INFO L256 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 15 conjuncts are in the unsatisfiable core [2024-11-28 02:07:20,824 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 02:07:21,102 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-28 02:07:21,102 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-28 02:07:21,334 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-28 02:07:21,334 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1349623918] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-28 02:07:21,334 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-28 02:07:21,334 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 24 [2024-11-28 02:07:21,334 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [986570196] [2024-11-28 02:07:21,334 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-28 02:07:21,334 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2024-11-28 02:07:21,335 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 02:07:21,335 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2024-11-28 02:07:21,335 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=126, Invalid=474, Unknown=0, NotChecked=0, Total=600 [2024-11-28 02:07:21,344 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 22 [2024-11-28 02:07:21,344 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 156 places, 201 transitions, 1578 flow. Second operand has 25 states, 25 states have (on average 4.68) internal successors, (117), 25 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 02:07:21,344 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-28 02:07:21,344 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 22 [2024-11-28 02:07:21,344 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-28 02:07:23,419 INFO L124 PetriNetUnfolderBase]: 700/1311 cut-off events. [2024-11-28 02:07:23,419 INFO L125 PetriNetUnfolderBase]: For 6777/6777 co-relation queries the response was YES. [2024-11-28 02:07:23,428 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6219 conditions, 1311 events. 700/1311 cut-off events. For 6777/6777 co-relation queries the response was YES. Maximal size of possible extension queue 88. Compared 6807 event pairs, 44 based on Foata normal form. 3/1306 useless extension candidates. Maximal degree in co-relation 5987. Up to 379 conditions per place. [2024-11-28 02:07:23,435 INFO L140 encePairwiseOnDemand]: 10/22 looper letters, 172 selfloop transitions, 210 changer transitions 9/392 dead transitions. [2024-11-28 02:07:23,435 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 197 places, 392 transitions, 3670 flow [2024-11-28 02:07:23,435 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2024-11-28 02:07:23,435 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 44 states. [2024-11-28 02:07:23,437 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 368 transitions. [2024-11-28 02:07:23,437 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.38016528925619836 [2024-11-28 02:07:23,437 INFO L175 Difference]: Start difference. First operand has 156 places, 201 transitions, 1578 flow. Second operand 44 states and 368 transitions. [2024-11-28 02:07:23,437 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 197 places, 392 transitions, 3670 flow [2024-11-28 02:07:23,489 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 186 places, 392 transitions, 3402 flow, removed 82 selfloop flow, removed 11 redundant places. [2024-11-28 02:07:23,495 INFO L231 Difference]: Finished difference. Result has 199 places, 278 transitions, 2557 flow [2024-11-28 02:07:23,496 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=22, PETRI_DIFFERENCE_MINUEND_FLOW=1371, PETRI_DIFFERENCE_MINUEND_PLACES=143, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=200, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=135, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=51, PETRI_DIFFERENCE_SUBTRAHEND_STATES=44, PETRI_FLOW=2557, PETRI_PLACES=199, PETRI_TRANSITIONS=278} [2024-11-28 02:07:23,496 INFO L279 CegarLoopForPetriNet]: 24 programPoint places, 175 predicate places. [2024-11-28 02:07:23,496 INFO L471 AbstractCegarLoop]: Abstraction has has 199 places, 278 transitions, 2557 flow [2024-11-28 02:07:23,497 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 4.68) internal successors, (117), 25 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 02:07:23,497 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-28 02:07:23,497 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 02:07:23,508 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4c6a019f-02cd-4563-9ada-3009abc1415a/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2024-11-28 02:07:23,697 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4c6a019f-02cd-4563-9ada-3009abc1415a/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 02:07:23,698 INFO L396 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-11-28 02:07:23,698 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 02:07:23,698 INFO L85 PathProgramCache]: Analyzing trace with hash 990375495, now seen corresponding path program 5 times [2024-11-28 02:07:23,698 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 02:07:23,698 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1833490393] [2024-11-28 02:07:23,698 INFO L95 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-11-28 02:07:23,698 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 02:07:23,705 INFO L229 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2024-11-28 02:07:23,706 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 02:07:23,937 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-28 02:07:23,937 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 02:07:23,937 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1833490393] [2024-11-28 02:07:23,937 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1833490393] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-28 02:07:23,937 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-28 02:07:23,937 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-11-28 02:07:23,938 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [913623886] [2024-11-28 02:07:23,938 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-28 02:07:23,938 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-11-28 02:07:23,938 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 02:07:23,938 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-11-28 02:07:23,938 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2024-11-28 02:07:23,949 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 22 [2024-11-28 02:07:23,949 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 199 places, 278 transitions, 2557 flow. Second operand has 10 states, 10 states have (on average 4.5) internal successors, (45), 10 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 02:07:23,950 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-28 02:07:23,950 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 22 [2024-11-28 02:07:23,950 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-28 02:07:24,376 INFO L124 PetriNetUnfolderBase]: 713/1330 cut-off events. [2024-11-28 02:07:24,377 INFO L125 PetriNetUnfolderBase]: For 10999/10999 co-relation queries the response was YES. [2024-11-28 02:07:24,387 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7320 conditions, 1330 events. 713/1330 cut-off events. For 10999/10999 co-relation queries the response was YES. Maximal size of possible extension queue 89. Compared 6894 event pairs, 75 based on Foata normal form. 1/1329 useless extension candidates. Maximal degree in co-relation 7001. Up to 1232 conditions per place. [2024-11-28 02:07:24,394 INFO L140 encePairwiseOnDemand]: 12/22 looper letters, 280 selfloop transitions, 23 changer transitions 4/308 dead transitions. [2024-11-28 02:07:24,395 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 207 places, 308 transitions, 3356 flow [2024-11-28 02:07:24,395 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-11-28 02:07:24,395 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-11-28 02:07:24,395 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 88 transitions. [2024-11-28 02:07:24,396 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.36363636363636365 [2024-11-28 02:07:24,396 INFO L175 Difference]: Start difference. First operand has 199 places, 278 transitions, 2557 flow. Second operand 11 states and 88 transitions. [2024-11-28 02:07:24,396 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 207 places, 308 transitions, 3356 flow [2024-11-28 02:07:24,455 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 196 places, 308 transitions, 3172 flow, removed 43 selfloop flow, removed 11 redundant places. [2024-11-28 02:07:24,463 INFO L231 Difference]: Finished difference. Result has 201 places, 287 transitions, 2547 flow [2024-11-28 02:07:24,464 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=22, PETRI_DIFFERENCE_MINUEND_FLOW=2385, PETRI_DIFFERENCE_MINUEND_PLACES=186, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=278, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=14, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=257, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=2547, PETRI_PLACES=201, PETRI_TRANSITIONS=287} [2024-11-28 02:07:24,464 INFO L279 CegarLoopForPetriNet]: 24 programPoint places, 177 predicate places. [2024-11-28 02:07:24,465 INFO L471 AbstractCegarLoop]: Abstraction has has 201 places, 287 transitions, 2547 flow [2024-11-28 02:07:24,465 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 4.5) internal successors, (45), 10 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 02:07:24,465 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-28 02:07:24,465 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 02:07:24,465 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2024-11-28 02:07:24,465 INFO L396 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-11-28 02:07:24,466 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 02:07:24,466 INFO L85 PathProgramCache]: Analyzing trace with hash 116634815, now seen corresponding path program 6 times [2024-11-28 02:07:24,466 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 02:07:24,466 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1793859231] [2024-11-28 02:07:24,466 INFO L95 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2024-11-28 02:07:24,466 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 02:07:24,476 INFO L229 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 1 check-sat command(s) [2024-11-28 02:07:24,476 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 02:07:24,697 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-28 02:07:24,697 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 02:07:24,697 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1793859231] [2024-11-28 02:07:24,697 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1793859231] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-28 02:07:24,697 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-28 02:07:24,697 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-11-28 02:07:24,697 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [219897645] [2024-11-28 02:07:24,697 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-28 02:07:24,698 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-11-28 02:07:24,698 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 02:07:24,698 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-11-28 02:07:24,698 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2024-11-28 02:07:24,707 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 22 [2024-11-28 02:07:24,708 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 201 places, 287 transitions, 2547 flow. Second operand has 10 states, 10 states have (on average 4.5) internal successors, (45), 10 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 02:07:24,708 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-28 02:07:24,708 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 22 [2024-11-28 02:07:24,708 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-28 02:07:25,171 INFO L124 PetriNetUnfolderBase]: 716/1339 cut-off events. [2024-11-28 02:07:25,172 INFO L125 PetriNetUnfolderBase]: For 10202/10202 co-relation queries the response was YES. [2024-11-28 02:07:25,180 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7178 conditions, 1339 events. 716/1339 cut-off events. For 10202/10202 co-relation queries the response was YES. Maximal size of possible extension queue 89. Compared 6973 event pairs, 75 based on Foata normal form. 1/1338 useless extension candidates. Maximal degree in co-relation 7114. Up to 1247 conditions per place. [2024-11-28 02:07:25,187 INFO L140 encePairwiseOnDemand]: 13/22 looper letters, 284 selfloop transitions, 19 changer transitions 4/308 dead transitions. [2024-11-28 02:07:25,187 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 209 places, 308 transitions, 3263 flow [2024-11-28 02:07:25,187 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-11-28 02:07:25,187 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-11-28 02:07:25,188 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 80 transitions. [2024-11-28 02:07:25,188 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.36363636363636365 [2024-11-28 02:07:25,188 INFO L175 Difference]: Start difference. First operand has 201 places, 287 transitions, 2547 flow. Second operand 10 states and 80 transitions. [2024-11-28 02:07:25,188 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 209 places, 308 transitions, 3263 flow [2024-11-28 02:07:25,236 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 204 places, 308 transitions, 3226 flow, removed 2 selfloop flow, removed 5 redundant places. [2024-11-28 02:07:25,241 INFO L231 Difference]: Finished difference. Result has 207 places, 289 transitions, 2580 flow [2024-11-28 02:07:25,242 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=22, PETRI_DIFFERENCE_MINUEND_FLOW=2510, PETRI_DIFFERENCE_MINUEND_PLACES=195, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=287, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=17, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=268, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=2580, PETRI_PLACES=207, PETRI_TRANSITIONS=289} [2024-11-28 02:07:25,242 INFO L279 CegarLoopForPetriNet]: 24 programPoint places, 183 predicate places. [2024-11-28 02:07:25,242 INFO L471 AbstractCegarLoop]: Abstraction has has 207 places, 289 transitions, 2580 flow [2024-11-28 02:07:25,242 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 4.5) internal successors, (45), 10 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 02:07:25,242 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-28 02:07:25,243 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 02:07:25,243 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2024-11-28 02:07:25,243 INFO L396 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-11-28 02:07:25,243 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 02:07:25,243 INFO L85 PathProgramCache]: Analyzing trace with hash -1586248095, now seen corresponding path program 7 times [2024-11-28 02:07:25,243 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 02:07:25,243 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [294830278] [2024-11-28 02:07:25,244 INFO L95 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-11-28 02:07:25,244 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 02:07:25,255 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 02:07:25,494 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-28 02:07:25,494 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 02:07:25,495 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [294830278] [2024-11-28 02:07:25,495 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [294830278] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-28 02:07:25,495 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-28 02:07:25,495 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-11-28 02:07:25,495 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [884188611] [2024-11-28 02:07:25,495 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-28 02:07:25,495 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-11-28 02:07:25,496 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 02:07:25,496 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-11-28 02:07:25,496 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2024-11-28 02:07:25,517 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 22 [2024-11-28 02:07:25,517 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 207 places, 289 transitions, 2580 flow. Second operand has 10 states, 10 states have (on average 4.5) internal successors, (45), 10 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 02:07:25,517 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-28 02:07:25,518 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 22 [2024-11-28 02:07:25,518 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-28 02:07:25,967 INFO L124 PetriNetUnfolderBase]: 749/1395 cut-off events. [2024-11-28 02:07:25,967 INFO L125 PetriNetUnfolderBase]: For 10352/10352 co-relation queries the response was YES. [2024-11-28 02:07:25,978 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7471 conditions, 1395 events. 749/1395 cut-off events. For 10352/10352 co-relation queries the response was YES. Maximal size of possible extension queue 89. Compared 7309 event pairs, 76 based on Foata normal form. 1/1394 useless extension candidates. Maximal degree in co-relation 7405. Up to 1261 conditions per place. [2024-11-28 02:07:25,986 INFO L140 encePairwiseOnDemand]: 12/22 looper letters, 293 selfloop transitions, 32 changer transitions 4/330 dead transitions. [2024-11-28 02:07:25,986 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 216 places, 330 transitions, 3497 flow [2024-11-28 02:07:25,987 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-11-28 02:07:25,987 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-11-28 02:07:25,988 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 95 transitions. [2024-11-28 02:07:25,988 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.3925619834710744 [2024-11-28 02:07:25,988 INFO L175 Difference]: Start difference. First operand has 207 places, 289 transitions, 2580 flow. Second operand 11 states and 95 transitions. [2024-11-28 02:07:25,988 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 216 places, 330 transitions, 3497 flow [2024-11-28 02:07:26,043 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 209 places, 330 transitions, 3457 flow, removed 3 selfloop flow, removed 7 redundant places. [2024-11-28 02:07:26,048 INFO L231 Difference]: Finished difference. Result has 212 places, 299 transitions, 2731 flow [2024-11-28 02:07:26,049 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=22, PETRI_DIFFERENCE_MINUEND_FLOW=2540, PETRI_DIFFERENCE_MINUEND_PLACES=199, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=289, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=22, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=257, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=2731, PETRI_PLACES=212, PETRI_TRANSITIONS=299} [2024-11-28 02:07:26,050 INFO L279 CegarLoopForPetriNet]: 24 programPoint places, 188 predicate places. [2024-11-28 02:07:26,050 INFO L471 AbstractCegarLoop]: Abstraction has has 212 places, 299 transitions, 2731 flow [2024-11-28 02:07:26,051 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 4.5) internal successors, (45), 10 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 02:07:26,051 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-28 02:07:26,051 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 02:07:26,051 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2024-11-28 02:07:26,051 INFO L396 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-11-28 02:07:26,051 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 02:07:26,051 INFO L85 PathProgramCache]: Analyzing trace with hash -1155795265, now seen corresponding path program 8 times [2024-11-28 02:07:26,052 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 02:07:26,052 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [942249417] [2024-11-28 02:07:26,052 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-28 02:07:26,052 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 02:07:26,061 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2024-11-28 02:07:26,061 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 02:07:26,290 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-28 02:07:26,290 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 02:07:26,290 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [942249417] [2024-11-28 02:07:26,291 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [942249417] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-28 02:07:26,291 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-28 02:07:26,291 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-11-28 02:07:26,291 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [961632996] [2024-11-28 02:07:26,291 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-28 02:07:26,291 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-11-28 02:07:26,291 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 02:07:26,292 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-11-28 02:07:26,292 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2024-11-28 02:07:26,302 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 22 [2024-11-28 02:07:26,302 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 212 places, 299 transitions, 2731 flow. Second operand has 10 states, 10 states have (on average 4.5) internal successors, (45), 10 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 02:07:26,302 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-28 02:07:26,302 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 22 [2024-11-28 02:07:26,302 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-28 02:07:26,742 INFO L124 PetriNetUnfolderBase]: 753/1407 cut-off events. [2024-11-28 02:07:26,742 INFO L125 PetriNetUnfolderBase]: For 10520/10520 co-relation queries the response was YES. [2024-11-28 02:07:26,756 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7623 conditions, 1407 events. 753/1407 cut-off events. For 10520/10520 co-relation queries the response was YES. Maximal size of possible extension queue 90. Compared 7412 event pairs, 78 based on Foata normal form. 1/1406 useless extension candidates. Maximal degree in co-relation 7555. Up to 1308 conditions per place. [2024-11-28 02:07:26,764 INFO L140 encePairwiseOnDemand]: 12/22 looper letters, 290 selfloop transitions, 25 changer transitions 4/320 dead transitions. [2024-11-28 02:07:26,765 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 221 places, 320 transitions, 3482 flow [2024-11-28 02:07:26,765 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-11-28 02:07:26,765 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-11-28 02:07:26,766 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 87 transitions. [2024-11-28 02:07:26,766 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.359504132231405 [2024-11-28 02:07:26,766 INFO L175 Difference]: Start difference. First operand has 212 places, 299 transitions, 2731 flow. Second operand 11 states and 87 transitions. [2024-11-28 02:07:26,766 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 221 places, 320 transitions, 3482 flow [2024-11-28 02:07:26,856 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 213 places, 320 transitions, 3422 flow, removed 5 selfloop flow, removed 8 redundant places. [2024-11-28 02:07:26,861 INFO L231 Difference]: Finished difference. Result has 216 places, 302 transitions, 2773 flow [2024-11-28 02:07:26,862 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=22, PETRI_DIFFERENCE_MINUEND_FLOW=2673, PETRI_DIFFERENCE_MINUEND_PLACES=203, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=299, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=22, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=275, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=2773, PETRI_PLACES=216, PETRI_TRANSITIONS=302} [2024-11-28 02:07:26,863 INFO L279 CegarLoopForPetriNet]: 24 programPoint places, 192 predicate places. [2024-11-28 02:07:26,863 INFO L471 AbstractCegarLoop]: Abstraction has has 216 places, 302 transitions, 2773 flow [2024-11-28 02:07:26,863 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 4.5) internal successors, (45), 10 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 02:07:26,863 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-28 02:07:26,863 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 02:07:26,864 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2024-11-28 02:07:26,864 INFO L396 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-11-28 02:07:26,864 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 02:07:26,864 INFO L85 PathProgramCache]: Analyzing trace with hash -2029535945, now seen corresponding path program 9 times [2024-11-28 02:07:26,865 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 02:07:26,865 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [313427253] [2024-11-28 02:07:26,865 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-28 02:07:26,865 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 02:07:26,876 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 1 check-sat command(s) [2024-11-28 02:07:26,876 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 02:07:27,084 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-28 02:07:27,085 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 02:07:27,085 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [313427253] [2024-11-28 02:07:27,085 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [313427253] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-28 02:07:27,085 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-28 02:07:27,085 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-11-28 02:07:27,085 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [72635131] [2024-11-28 02:07:27,085 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-28 02:07:27,086 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-11-28 02:07:27,086 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 02:07:27,086 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-11-28 02:07:27,086 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=62, Unknown=0, NotChecked=0, Total=90 [2024-11-28 02:07:27,092 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 22 [2024-11-28 02:07:27,092 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 216 places, 302 transitions, 2773 flow. Second operand has 10 states, 10 states have (on average 4.5) internal successors, (45), 10 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 02:07:27,092 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-28 02:07:27,092 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 22 [2024-11-28 02:07:27,093 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-28 02:07:27,562 INFO L124 PetriNetUnfolderBase]: 756/1416 cut-off events. [2024-11-28 02:07:27,562 INFO L125 PetriNetUnfolderBase]: For 10669/10669 co-relation queries the response was YES. [2024-11-28 02:07:27,574 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7681 conditions, 1416 events. 756/1416 cut-off events. For 10669/10669 co-relation queries the response was YES. Maximal size of possible extension queue 90. Compared 7493 event pairs, 78 based on Foata normal form. 1/1415 useless extension candidates. Maximal degree in co-relation 7611. Up to 1323 conditions per place. [2024-11-28 02:07:27,587 INFO L140 encePairwiseOnDemand]: 13/22 looper letters, 294 selfloop transitions, 21 changer transitions 4/320 dead transitions. [2024-11-28 02:07:27,587 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 224 places, 320 transitions, 3509 flow [2024-11-28 02:07:27,588 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-11-28 02:07:27,589 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-11-28 02:07:27,589 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 79 transitions. [2024-11-28 02:07:27,589 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.35909090909090907 [2024-11-28 02:07:27,589 INFO L175 Difference]: Start difference. First operand has 216 places, 302 transitions, 2773 flow. Second operand 10 states and 79 transitions. [2024-11-28 02:07:27,589 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 224 places, 320 transitions, 3509 flow [2024-11-28 02:07:27,655 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 217 places, 320 transitions, 3448 flow, removed 12 selfloop flow, removed 7 redundant places. [2024-11-28 02:07:27,662 INFO L231 Difference]: Finished difference. Result has 220 places, 304 transitions, 2796 flow [2024-11-28 02:07:27,663 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=22, PETRI_DIFFERENCE_MINUEND_FLOW=2712, PETRI_DIFFERENCE_MINUEND_PLACES=208, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=302, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=19, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=281, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=2796, PETRI_PLACES=220, PETRI_TRANSITIONS=304} [2024-11-28 02:07:27,664 INFO L279 CegarLoopForPetriNet]: 24 programPoint places, 196 predicate places. [2024-11-28 02:07:27,664 INFO L471 AbstractCegarLoop]: Abstraction has has 220 places, 304 transitions, 2796 flow [2024-11-28 02:07:27,665 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 4.5) internal successors, (45), 10 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 02:07:27,665 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-28 02:07:27,665 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 02:07:27,665 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2024-11-28 02:07:27,665 INFO L396 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-11-28 02:07:27,666 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 02:07:27,667 INFO L85 PathProgramCache]: Analyzing trace with hash -1856288253, now seen corresponding path program 10 times [2024-11-28 02:07:27,667 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 02:07:27,667 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [472131491] [2024-11-28 02:07:27,667 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-11-28 02:07:27,667 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 02:07:27,679 INFO L229 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-11-28 02:07:27,679 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 02:07:27,878 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-28 02:07:27,879 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 02:07:27,879 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [472131491] [2024-11-28 02:07:27,879 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [472131491] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-28 02:07:27,879 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [157746761] [2024-11-28 02:07:27,879 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-11-28 02:07:27,879 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 02:07:27,879 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4c6a019f-02cd-4563-9ada-3009abc1415a/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 02:07:27,881 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4c6a019f-02cd-4563-9ada-3009abc1415a/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 02:07:27,884 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4c6a019f-02cd-4563-9ada-3009abc1415a/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2024-11-28 02:07:27,935 INFO L229 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-11-28 02:07:27,935 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 02:07:27,938 INFO L256 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 15 conjuncts are in the unsatisfiable core [2024-11-28 02:07:27,939 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 02:07:28,198 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-28 02:07:28,198 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-28 02:07:28,440 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-28 02:07:28,440 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [157746761] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-28 02:07:28,440 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-28 02:07:28,440 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 24 [2024-11-28 02:07:28,440 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2078218587] [2024-11-28 02:07:28,440 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-28 02:07:28,441 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2024-11-28 02:07:28,441 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 02:07:28,441 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2024-11-28 02:07:28,442 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=125, Invalid=475, Unknown=0, NotChecked=0, Total=600 [2024-11-28 02:07:28,444 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 22 [2024-11-28 02:07:28,445 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 220 places, 304 transitions, 2796 flow. Second operand has 25 states, 25 states have (on average 4.68) internal successors, (117), 25 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 02:07:28,445 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-28 02:07:28,445 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 22 [2024-11-28 02:07:28,445 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-28 02:07:29,249 INFO L124 PetriNetUnfolderBase]: 829/1564 cut-off events. [2024-11-28 02:07:29,249 INFO L125 PetriNetUnfolderBase]: For 11312/11312 co-relation queries the response was YES. [2024-11-28 02:07:29,292 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8406 conditions, 1564 events. 829/1564 cut-off events. For 11312/11312 co-relation queries the response was YES. Maximal size of possible extension queue 103. Compared 8621 event pairs, 57 based on Foata normal form. 2/1564 useless extension candidates. Maximal degree in co-relation 8336. Up to 1066 conditions per place. [2024-11-28 02:07:29,299 INFO L140 encePairwiseOnDemand]: 11/22 looper letters, 171 selfloop transitions, 205 changer transitions 8/385 dead transitions. [2024-11-28 02:07:29,299 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 237 places, 385 transitions, 4145 flow [2024-11-28 02:07:29,299 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2024-11-28 02:07:29,299 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19 states. [2024-11-28 02:07:29,303 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 143 transitions. [2024-11-28 02:07:29,303 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.34210526315789475 [2024-11-28 02:07:29,303 INFO L175 Difference]: Start difference. First operand has 220 places, 304 transitions, 2796 flow. Second operand 19 states and 143 transitions. [2024-11-28 02:07:29,303 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 237 places, 385 transitions, 4145 flow [2024-11-28 02:07:29,365 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 230 places, 385 transitions, 4091 flow, removed 8 selfloop flow, removed 7 redundant places. [2024-11-28 02:07:29,372 INFO L231 Difference]: Finished difference. Result has 239 places, 350 transitions, 3974 flow [2024-11-28 02:07:29,372 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=22, PETRI_DIFFERENCE_MINUEND_FLOW=2742, PETRI_DIFFERENCE_MINUEND_PLACES=212, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=304, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=159, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=122, PETRI_DIFFERENCE_SUBTRAHEND_STATES=19, PETRI_FLOW=3974, PETRI_PLACES=239, PETRI_TRANSITIONS=350} [2024-11-28 02:07:29,374 INFO L279 CegarLoopForPetriNet]: 24 programPoint places, 215 predicate places. [2024-11-28 02:07:29,375 INFO L471 AbstractCegarLoop]: Abstraction has has 239 places, 350 transitions, 3974 flow [2024-11-28 02:07:29,376 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 4.68) internal successors, (117), 25 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 02:07:29,376 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-28 02:07:29,376 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 02:07:29,386 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4c6a019f-02cd-4563-9ada-3009abc1415a/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2024-11-28 02:07:29,576 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4c6a019f-02cd-4563-9ada-3009abc1415a/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 02:07:29,577 INFO L396 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-11-28 02:07:29,577 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 02:07:29,577 INFO L85 PathProgramCache]: Analyzing trace with hash 562548441, now seen corresponding path program 11 times [2024-11-28 02:07:29,578 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 02:07:29,578 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [716156134] [2024-11-28 02:07:29,578 INFO L95 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-11-28 02:07:29,578 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 02:07:29,587 INFO L229 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-28 02:07:29,587 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 02:07:29,813 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-28 02:07:29,813 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 02:07:29,813 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [716156134] [2024-11-28 02:07:29,813 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [716156134] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-28 02:07:29,813 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1049450799] [2024-11-28 02:07:29,813 INFO L95 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-11-28 02:07:29,813 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 02:07:29,813 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4c6a019f-02cd-4563-9ada-3009abc1415a/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 02:07:29,815 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4c6a019f-02cd-4563-9ada-3009abc1415a/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 02:07:29,818 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4c6a019f-02cd-4563-9ada-3009abc1415a/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2024-11-28 02:07:29,866 INFO L229 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-28 02:07:29,866 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 02:07:29,867 INFO L256 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 15 conjuncts are in the unsatisfiable core [2024-11-28 02:07:29,868 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 02:07:30,138 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-28 02:07:30,138 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-28 02:07:30,362 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-28 02:07:30,362 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1049450799] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-28 02:07:30,362 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-28 02:07:30,362 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 24 [2024-11-28 02:07:30,362 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2016518499] [2024-11-28 02:07:30,362 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-28 02:07:30,362 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2024-11-28 02:07:30,363 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 02:07:30,363 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2024-11-28 02:07:30,363 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=109, Invalid=491, Unknown=0, NotChecked=0, Total=600 [2024-11-28 02:07:30,367 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 22 [2024-11-28 02:07:30,368 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 239 places, 350 transitions, 3974 flow. Second operand has 25 states, 25 states have (on average 4.68) internal successors, (117), 25 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 02:07:30,368 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-28 02:07:30,368 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 22 [2024-11-28 02:07:30,368 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-28 02:07:33,656 INFO L124 PetriNetUnfolderBase]: 1287/2421 cut-off events. [2024-11-28 02:07:33,656 INFO L125 PetriNetUnfolderBase]: For 21526/21526 co-relation queries the response was YES. [2024-11-28 02:07:33,677 INFO L83 FinitePrefix]: Finished finitePrefix Result has 14598 conditions, 2421 events. 1287/2421 cut-off events. For 21526/21526 co-relation queries the response was YES. Maximal size of possible extension queue 180. Compared 14987 event pairs, 48 based on Foata normal form. 3/2424 useless extension candidates. Maximal degree in co-relation 14521. Up to 922 conditions per place. [2024-11-28 02:07:33,690 INFO L140 encePairwiseOnDemand]: 10/22 looper letters, 271 selfloop transitions, 417 changer transitions 13/702 dead transitions. [2024-11-28 02:07:33,690 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 303 places, 702 transitions, 8494 flow [2024-11-28 02:07:33,691 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 68 states. [2024-11-28 02:07:33,691 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 68 states. [2024-11-28 02:07:33,692 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68 states to 68 states and 508 transitions. [2024-11-28 02:07:33,693 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.339572192513369 [2024-11-28 02:07:33,693 INFO L175 Difference]: Start difference. First operand has 239 places, 350 transitions, 3974 flow. Second operand 68 states and 508 transitions. [2024-11-28 02:07:33,693 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 303 places, 702 transitions, 8494 flow [2024-11-28 02:07:33,896 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 291 places, 702 transitions, 8390 flow, removed 15 selfloop flow, removed 12 redundant places. [2024-11-28 02:07:33,902 INFO L231 Difference]: Finished difference. Result has 318 places, 569 transitions, 7692 flow [2024-11-28 02:07:33,903 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=22, PETRI_DIFFERENCE_MINUEND_FLOW=3868, PETRI_DIFFERENCE_MINUEND_PLACES=224, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=349, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=224, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=86, PETRI_DIFFERENCE_SUBTRAHEND_STATES=68, PETRI_FLOW=7692, PETRI_PLACES=318, PETRI_TRANSITIONS=569} [2024-11-28 02:07:33,903 INFO L279 CegarLoopForPetriNet]: 24 programPoint places, 294 predicate places. [2024-11-28 02:07:33,903 INFO L471 AbstractCegarLoop]: Abstraction has has 318 places, 569 transitions, 7692 flow [2024-11-28 02:07:33,903 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 4.68) internal successors, (117), 25 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 02:07:33,903 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-28 02:07:33,903 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 02:07:33,910 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4c6a019f-02cd-4563-9ada-3009abc1415a/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2024-11-28 02:07:34,105 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4c6a019f-02cd-4563-9ada-3009abc1415a/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 02:07:34,106 INFO L396 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-11-28 02:07:34,106 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 02:07:34,106 INFO L85 PathProgramCache]: Analyzing trace with hash -1268542931, now seen corresponding path program 12 times [2024-11-28 02:07:34,106 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 02:07:34,106 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [509122078] [2024-11-28 02:07:34,106 INFO L95 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2024-11-28 02:07:34,106 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 02:07:34,113 INFO L229 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2024-11-28 02:07:34,113 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 02:07:34,320 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-28 02:07:34,322 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 02:07:34,322 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [509122078] [2024-11-28 02:07:34,322 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [509122078] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-28 02:07:34,322 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1928973752] [2024-11-28 02:07:34,322 INFO L95 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2024-11-28 02:07:34,322 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 02:07:34,323 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4c6a019f-02cd-4563-9ada-3009abc1415a/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 02:07:34,324 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4c6a019f-02cd-4563-9ada-3009abc1415a/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 02:07:34,327 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4c6a019f-02cd-4563-9ada-3009abc1415a/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2024-11-28 02:07:34,376 INFO L229 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2024-11-28 02:07:34,376 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 02:07:34,377 INFO L256 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 15 conjuncts are in the unsatisfiable core [2024-11-28 02:07:34,378 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 02:07:34,624 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-28 02:07:34,625 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-28 02:07:34,795 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-28 02:07:34,795 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1928973752] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-28 02:07:34,795 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-28 02:07:34,795 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 24 [2024-11-28 02:07:34,795 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1584284340] [2024-11-28 02:07:34,795 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-28 02:07:34,795 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2024-11-28 02:07:34,796 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 02:07:34,796 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2024-11-28 02:07:34,796 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=125, Invalid=475, Unknown=0, NotChecked=0, Total=600 [2024-11-28 02:07:34,815 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 22 [2024-11-28 02:07:34,816 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 318 places, 569 transitions, 7692 flow. Second operand has 25 states, 25 states have (on average 4.68) internal successors, (117), 25 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 02:07:34,816 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-28 02:07:34,816 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 22 [2024-11-28 02:07:34,816 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-28 02:07:35,873 INFO L124 PetriNetUnfolderBase]: 1290/2432 cut-off events. [2024-11-28 02:07:35,873 INFO L125 PetriNetUnfolderBase]: For 40868/40868 co-relation queries the response was YES. [2024-11-28 02:07:35,885 INFO L83 FinitePrefix]: Finished finitePrefix Result has 17791 conditions, 2432 events. 1290/2432 cut-off events. For 40868/40868 co-relation queries the response was YES. Maximal size of possible extension queue 182. Compared 15130 event pairs, 70 based on Foata normal form. 2/2434 useless extension candidates. Maximal degree in co-relation 17629. Up to 1603 conditions per place. [2024-11-28 02:07:35,896 INFO L140 encePairwiseOnDemand]: 11/22 looper letters, 258 selfloop transitions, 352 changer transitions 8/619 dead transitions. [2024-11-28 02:07:35,897 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 339 places, 619 transitions, 9254 flow [2024-11-28 02:07:35,899 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2024-11-28 02:07:35,899 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 25 states. [2024-11-28 02:07:35,900 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 176 transitions. [2024-11-28 02:07:35,900 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.32 [2024-11-28 02:07:35,900 INFO L175 Difference]: Start difference. First operand has 318 places, 569 transitions, 7692 flow. Second operand 25 states and 176 transitions. [2024-11-28 02:07:35,900 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 339 places, 619 transitions, 9254 flow [2024-11-28 02:07:36,282 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 323 places, 619 transitions, 8690 flow, removed 206 selfloop flow, removed 16 redundant places. [2024-11-28 02:07:36,293 INFO L231 Difference]: Finished difference. Result has 330 places, 579 transitions, 8374 flow [2024-11-28 02:07:36,294 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=22, PETRI_DIFFERENCE_MINUEND_FLOW=7135, PETRI_DIFFERENCE_MINUEND_PLACES=299, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=569, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=342, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=224, PETRI_DIFFERENCE_SUBTRAHEND_STATES=25, PETRI_FLOW=8374, PETRI_PLACES=330, PETRI_TRANSITIONS=579} [2024-11-28 02:07:36,295 INFO L279 CegarLoopForPetriNet]: 24 programPoint places, 306 predicate places. [2024-11-28 02:07:36,295 INFO L471 AbstractCegarLoop]: Abstraction has has 330 places, 579 transitions, 8374 flow [2024-11-28 02:07:36,295 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 4.68) internal successors, (117), 25 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 02:07:36,295 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-28 02:07:36,295 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 02:07:36,304 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4c6a019f-02cd-4563-9ada-3009abc1415a/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2024-11-28 02:07:36,499 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4c6a019f-02cd-4563-9ada-3009abc1415a/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2024-11-28 02:07:36,499 INFO L396 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-11-28 02:07:36,500 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 02:07:36,500 INFO L85 PathProgramCache]: Analyzing trace with hash 1011765613, now seen corresponding path program 13 times [2024-11-28 02:07:36,500 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 02:07:36,500 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1493418679] [2024-11-28 02:07:36,500 INFO L95 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-11-28 02:07:36,500 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 02:07:36,506 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 02:07:36,773 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-28 02:07:36,773 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 02:07:36,773 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1493418679] [2024-11-28 02:07:36,773 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1493418679] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-28 02:07:36,773 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [873317540] [2024-11-28 02:07:36,773 INFO L95 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-11-28 02:07:36,773 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 02:07:36,773 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4c6a019f-02cd-4563-9ada-3009abc1415a/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 02:07:36,775 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4c6a019f-02cd-4563-9ada-3009abc1415a/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 02:07:36,776 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4c6a019f-02cd-4563-9ada-3009abc1415a/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2024-11-28 02:07:36,817 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 02:07:36,818 INFO L256 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 15 conjuncts are in the unsatisfiable core [2024-11-28 02:07:36,819 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 02:07:37,048 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-28 02:07:37,048 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-28 02:07:37,236 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-28 02:07:37,237 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [873317540] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-28 02:07:37,237 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-28 02:07:37,237 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 24 [2024-11-28 02:07:37,237 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1336274881] [2024-11-28 02:07:37,237 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-28 02:07:37,237 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2024-11-28 02:07:37,238 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 02:07:37,238 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2024-11-28 02:07:37,238 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=117, Invalid=483, Unknown=0, NotChecked=0, Total=600 [2024-11-28 02:07:37,241 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 22 [2024-11-28 02:07:37,241 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 330 places, 579 transitions, 8374 flow. Second operand has 25 states, 25 states have (on average 4.68) internal successors, (117), 25 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 02:07:37,241 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-28 02:07:37,242 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 22 [2024-11-28 02:07:37,242 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-28 02:07:39,820 INFO L124 PetriNetUnfolderBase]: 1520/2851 cut-off events. [2024-11-28 02:07:39,820 INFO L125 PetriNetUnfolderBase]: For 47759/47759 co-relation queries the response was YES. [2024-11-28 02:07:39,838 INFO L83 FinitePrefix]: Finished finitePrefix Result has 21303 conditions, 2851 events. 1520/2851 cut-off events. For 47759/47759 co-relation queries the response was YES. Maximal size of possible extension queue 203. Compared 18235 event pairs, 61 based on Foata normal form. 3/2854 useless extension candidates. Maximal degree in co-relation 21199. Up to 1136 conditions per place. [2024-11-28 02:07:39,850 INFO L140 encePairwiseOnDemand]: 9/22 looper letters, 283 selfloop transitions, 514 changer transitions 12/810 dead transitions. [2024-11-28 02:07:39,850 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 375 places, 810 transitions, 12793 flow [2024-11-28 02:07:39,851 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2024-11-28 02:07:39,851 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 48 states. [2024-11-28 02:07:39,852 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 377 transitions. [2024-11-28 02:07:39,853 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.35700757575757575 [2024-11-28 02:07:39,853 INFO L175 Difference]: Start difference. First operand has 330 places, 579 transitions, 8374 flow. Second operand 48 states and 377 transitions. [2024-11-28 02:07:39,853 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 375 places, 810 transitions, 12793 flow [2024-11-28 02:07:40,205 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 361 places, 810 transitions, 12367 flow, removed 27 selfloop flow, removed 14 redundant places. [2024-11-28 02:07:40,216 INFO L231 Difference]: Finished difference. Result has 382 places, 707 transitions, 11677 flow [2024-11-28 02:07:40,216 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=22, PETRI_DIFFERENCE_MINUEND_FLOW=7980, PETRI_DIFFERENCE_MINUEND_PLACES=314, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=579, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=396, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=157, PETRI_DIFFERENCE_SUBTRAHEND_STATES=48, PETRI_FLOW=11677, PETRI_PLACES=382, PETRI_TRANSITIONS=707} [2024-11-28 02:07:40,217 INFO L279 CegarLoopForPetriNet]: 24 programPoint places, 358 predicate places. [2024-11-28 02:07:40,217 INFO L471 AbstractCegarLoop]: Abstraction has has 382 places, 707 transitions, 11677 flow [2024-11-28 02:07:40,217 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 4.68) internal successors, (117), 25 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 02:07:40,217 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-28 02:07:40,217 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 02:07:40,223 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4c6a019f-02cd-4563-9ada-3009abc1415a/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2024-11-28 02:07:40,418 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4c6a019f-02cd-4563-9ada-3009abc1415a/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 02:07:40,418 INFO L396 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-11-28 02:07:40,418 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 02:07:40,418 INFO L85 PathProgramCache]: Analyzing trace with hash -1441790623, now seen corresponding path program 14 times [2024-11-28 02:07:40,419 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 02:07:40,419 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1461680682] [2024-11-28 02:07:40,419 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-28 02:07:40,419 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 02:07:40,426 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2024-11-28 02:07:40,426 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 02:07:40,612 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-28 02:07:40,613 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 02:07:40,613 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1461680682] [2024-11-28 02:07:40,613 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1461680682] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-28 02:07:40,613 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-28 02:07:40,613 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-11-28 02:07:40,613 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1277381145] [2024-11-28 02:07:40,614 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-28 02:07:40,614 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-11-28 02:07:40,614 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 02:07:40,614 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-11-28 02:07:40,615 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2024-11-28 02:07:40,623 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 22 [2024-11-28 02:07:40,623 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 382 places, 707 transitions, 11677 flow. Second operand has 10 states, 10 states have (on average 4.5) internal successors, (45), 10 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 02:07:40,623 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-28 02:07:40,623 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 22 [2024-11-28 02:07:40,623 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-28 02:07:41,471 INFO L124 PetriNetUnfolderBase]: 1518/2847 cut-off events. [2024-11-28 02:07:41,471 INFO L125 PetriNetUnfolderBase]: For 72502/72502 co-relation queries the response was YES. [2024-11-28 02:07:41,500 INFO L83 FinitePrefix]: Finished finitePrefix Result has 24115 conditions, 2847 events. 1518/2847 cut-off events. For 72502/72502 co-relation queries the response was YES. Maximal size of possible extension queue 202. Compared 18153 event pairs, 126 based on Foata normal form. 1/2848 useless extension candidates. Maximal degree in co-relation 23990. Up to 2739 conditions per place. [2024-11-28 02:07:41,509 INFO L140 encePairwiseOnDemand]: 13/22 looper letters, 692 selfloop transitions, 26 changer transitions 4/723 dead transitions. [2024-11-28 02:07:41,509 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 388 places, 723 transitions, 13257 flow [2024-11-28 02:07:41,509 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-11-28 02:07:41,510 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-11-28 02:07:41,510 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 77 transitions. [2024-11-28 02:07:41,510 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.35 [2024-11-28 02:07:41,510 INFO L175 Difference]: Start difference. First operand has 382 places, 707 transitions, 11677 flow. Second operand 10 states and 77 transitions. [2024-11-28 02:07:41,510 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 388 places, 723 transitions, 13257 flow [2024-11-28 02:07:42,042 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 373 places, 723 transitions, 12697 flow, removed 237 selfloop flow, removed 15 redundant places. [2024-11-28 02:07:42,050 INFO L231 Difference]: Finished difference. Result has 376 places, 709 transitions, 11239 flow [2024-11-28 02:07:42,051 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=22, PETRI_DIFFERENCE_MINUEND_FLOW=11129, PETRI_DIFFERENCE_MINUEND_PLACES=364, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=707, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=24, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=681, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=11239, PETRI_PLACES=376, PETRI_TRANSITIONS=709} [2024-11-28 02:07:42,051 INFO L279 CegarLoopForPetriNet]: 24 programPoint places, 352 predicate places. [2024-11-28 02:07:42,051 INFO L471 AbstractCegarLoop]: Abstraction has has 376 places, 709 transitions, 11239 flow [2024-11-28 02:07:42,051 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 4.5) internal successors, (45), 10 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 02:07:42,051 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-28 02:07:42,051 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 02:07:42,052 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2024-11-28 02:07:42,052 INFO L396 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-11-28 02:07:42,052 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 02:07:42,052 INFO L85 PathProgramCache]: Analyzing trace with hash 1418109183, now seen corresponding path program 15 times [2024-11-28 02:07:42,052 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 02:07:42,052 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [363775281] [2024-11-28 02:07:42,052 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-28 02:07:42,052 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 02:07:42,059 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2024-11-28 02:07:42,059 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 02:07:42,216 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-28 02:07:42,216 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 02:07:42,216 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [363775281] [2024-11-28 02:07:42,216 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [363775281] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-28 02:07:42,216 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [225850679] [2024-11-28 02:07:42,216 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-28 02:07:42,217 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 02:07:42,217 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4c6a019f-02cd-4563-9ada-3009abc1415a/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 02:07:42,219 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4c6a019f-02cd-4563-9ada-3009abc1415a/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 02:07:42,222 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4c6a019f-02cd-4563-9ada-3009abc1415a/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2024-11-28 02:07:42,268 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2024-11-28 02:07:42,268 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 02:07:42,269 INFO L256 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 15 conjuncts are in the unsatisfiable core [2024-11-28 02:07:42,270 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 02:07:42,492 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-28 02:07:42,492 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-28 02:07:42,657 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-28 02:07:42,657 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [225850679] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-28 02:07:42,657 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-28 02:07:42,657 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 24 [2024-11-28 02:07:42,657 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [894979447] [2024-11-28 02:07:42,657 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-28 02:07:42,657 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2024-11-28 02:07:42,658 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 02:07:42,658 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2024-11-28 02:07:42,658 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=129, Invalid=471, Unknown=0, NotChecked=0, Total=600 [2024-11-28 02:07:42,663 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 22 [2024-11-28 02:07:42,664 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 376 places, 709 transitions, 11239 flow. Second operand has 25 states, 25 states have (on average 4.68) internal successors, (117), 25 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 02:07:42,664 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-28 02:07:42,664 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 22 [2024-11-28 02:07:42,664 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-28 02:07:43,830 INFO L124 PetriNetUnfolderBase]: 1524/2867 cut-off events. [2024-11-28 02:07:43,831 INFO L125 PetriNetUnfolderBase]: For 69045/69045 co-relation queries the response was YES. [2024-11-28 02:07:43,862 INFO L83 FinitePrefix]: Finished finitePrefix Result has 23592 conditions, 2867 events. 1524/2867 cut-off events. For 69045/69045 co-relation queries the response was YES. Maximal size of possible extension queue 204. Compared 18382 event pairs, 75 based on Foata normal form. 2/2869 useless extension candidates. Maximal degree in co-relation 23467. Up to 1906 conditions per place. [2024-11-28 02:07:43,875 INFO L140 encePairwiseOnDemand]: 11/22 looper letters, 357 selfloop transitions, 379 changer transitions 8/745 dead transitions. [2024-11-28 02:07:43,875 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 393 places, 745 transitions, 13034 flow [2024-11-28 02:07:43,875 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2024-11-28 02:07:43,876 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19 states. [2024-11-28 02:07:43,876 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 139 transitions. [2024-11-28 02:07:43,876 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.33253588516746413 [2024-11-28 02:07:43,877 INFO L175 Difference]: Start difference. First operand has 376 places, 709 transitions, 11239 flow. Second operand 19 states and 139 transitions. [2024-11-28 02:07:43,877 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 393 places, 745 transitions, 13034 flow [2024-11-28 02:07:44,301 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 385 places, 745 transitions, 12964 flow, removed 7 selfloop flow, removed 8 redundant places. [2024-11-28 02:07:44,310 INFO L231 Difference]: Finished difference. Result has 392 places, 714 transitions, 12538 flow [2024-11-28 02:07:44,311 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=22, PETRI_DIFFERENCE_MINUEND_FLOW=11169, PETRI_DIFFERENCE_MINUEND_PLACES=367, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=709, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=374, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=332, PETRI_DIFFERENCE_SUBTRAHEND_STATES=19, PETRI_FLOW=12538, PETRI_PLACES=392, PETRI_TRANSITIONS=714} [2024-11-28 02:07:44,311 INFO L279 CegarLoopForPetriNet]: 24 programPoint places, 368 predicate places. [2024-11-28 02:07:44,311 INFO L471 AbstractCegarLoop]: Abstraction has has 392 places, 714 transitions, 12538 flow [2024-11-28 02:07:44,312 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 4.68) internal successors, (117), 25 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 02:07:44,312 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-28 02:07:44,312 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 02:07:44,320 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4c6a019f-02cd-4563-9ada-3009abc1415a/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2024-11-28 02:07:44,516 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4c6a019f-02cd-4563-9ada-3009abc1415a/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 02:07:44,516 INFO L396 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-11-28 02:07:44,517 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 02:07:44,517 INFO L85 PathProgramCache]: Analyzing trace with hash 1150293763, now seen corresponding path program 16 times [2024-11-28 02:07:44,517 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 02:07:44,517 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1460577009] [2024-11-28 02:07:44,517 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-11-28 02:07:44,517 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 02:07:44,524 INFO L229 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-11-28 02:07:44,524 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 02:07:44,694 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-28 02:07:44,695 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 02:07:44,695 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1460577009] [2024-11-28 02:07:44,695 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1460577009] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-28 02:07:44,695 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1682584629] [2024-11-28 02:07:44,695 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-11-28 02:07:44,695 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 02:07:44,695 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4c6a019f-02cd-4563-9ada-3009abc1415a/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 02:07:44,698 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4c6a019f-02cd-4563-9ada-3009abc1415a/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 02:07:44,701 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4c6a019f-02cd-4563-9ada-3009abc1415a/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2024-11-28 02:07:44,749 INFO L229 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-11-28 02:07:44,749 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 02:07:44,751 INFO L256 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 15 conjuncts are in the unsatisfiable core [2024-11-28 02:07:44,752 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 02:07:44,978 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-28 02:07:44,978 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-28 02:07:45,253 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-28 02:07:45,253 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1682584629] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-28 02:07:45,253 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-28 02:07:45,254 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 24 [2024-11-28 02:07:45,254 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [878816762] [2024-11-28 02:07:45,254 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-28 02:07:45,254 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2024-11-28 02:07:45,254 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 02:07:45,255 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2024-11-28 02:07:45,255 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=120, Invalid=480, Unknown=0, NotChecked=0, Total=600 [2024-11-28 02:07:45,261 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 22 [2024-11-28 02:07:45,261 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 392 places, 714 transitions, 12538 flow. Second operand has 25 states, 25 states have (on average 4.68) internal successors, (117), 25 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 02:07:45,261 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-28 02:07:45,262 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 22 [2024-11-28 02:07:45,262 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-28 02:07:48,137 INFO L124 PetriNetUnfolderBase]: 1556/2926 cut-off events. [2024-11-28 02:07:48,138 INFO L125 PetriNetUnfolderBase]: For 77843/77843 co-relation queries the response was YES. [2024-11-28 02:07:48,199 INFO L83 FinitePrefix]: Finished finitePrefix Result has 25683 conditions, 2926 events. 1556/2926 cut-off events. For 77843/77843 co-relation queries the response was YES. Maximal size of possible extension queue 213. Compared 18883 event pairs, 68 based on Foata normal form. 3/2929 useless extension candidates. Maximal degree in co-relation 25564. Up to 1291 conditions per place. [2024-11-28 02:07:48,212 INFO L140 encePairwiseOnDemand]: 10/22 looper letters, 261 selfloop transitions, 562 changer transitions 12/836 dead transitions. [2024-11-28 02:07:48,212 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 442 places, 836 transitions, 15529 flow [2024-11-28 02:07:48,213 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 56 states. [2024-11-28 02:07:48,213 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 56 states. [2024-11-28 02:07:48,214 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 402 transitions. [2024-11-28 02:07:48,214 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.3262987012987013 [2024-11-28 02:07:48,215 INFO L175 Difference]: Start difference. First operand has 392 places, 714 transitions, 12538 flow. Second operand 56 states and 402 transitions. [2024-11-28 02:07:48,215 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 442 places, 836 transitions, 15529 flow [2024-11-28 02:07:48,760 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 431 places, 836 transitions, 15212 flow, removed 14 selfloop flow, removed 11 redundant places. [2024-11-28 02:07:48,774 INFO L231 Difference]: Finished difference. Result has 439 places, 751 transitions, 14386 flow [2024-11-28 02:07:48,775 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=22, PETRI_DIFFERENCE_MINUEND_FLOW=12222, PETRI_DIFFERENCE_MINUEND_PLACES=376, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=713, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=523, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=184, PETRI_DIFFERENCE_SUBTRAHEND_STATES=56, PETRI_FLOW=14386, PETRI_PLACES=439, PETRI_TRANSITIONS=751} [2024-11-28 02:07:48,776 INFO L279 CegarLoopForPetriNet]: 24 programPoint places, 415 predicate places. [2024-11-28 02:07:48,776 INFO L471 AbstractCegarLoop]: Abstraction has has 439 places, 751 transitions, 14386 flow [2024-11-28 02:07:48,776 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 4.68) internal successors, (117), 25 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 02:07:48,776 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-28 02:07:48,776 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 02:07:48,786 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4c6a019f-02cd-4563-9ada-3009abc1415a/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Ended with exit code 0 [2024-11-28 02:07:48,980 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4c6a019f-02cd-4563-9ada-3009abc1415a/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21 [2024-11-28 02:07:48,980 INFO L396 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-11-28 02:07:48,981 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 02:07:48,981 INFO L85 PathProgramCache]: Analyzing trace with hash -1951564486, now seen corresponding path program 1 times [2024-11-28 02:07:48,981 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 02:07:48,981 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [68606874] [2024-11-28 02:07:48,981 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-28 02:07:48,981 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 02:07:48,987 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 02:07:49,230 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-28 02:07:49,230 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 02:07:49,230 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [68606874] [2024-11-28 02:07:49,231 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [68606874] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-28 02:07:49,231 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [804668501] [2024-11-28 02:07:49,231 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-28 02:07:49,231 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 02:07:49,231 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4c6a019f-02cd-4563-9ada-3009abc1415a/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 02:07:49,233 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4c6a019f-02cd-4563-9ada-3009abc1415a/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 02:07:49,236 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4c6a019f-02cd-4563-9ada-3009abc1415a/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2024-11-28 02:07:49,284 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 02:07:49,285 INFO L256 TraceCheckSpWp]: Trace formula consists of 104 conjuncts, 19 conjuncts are in the unsatisfiable core [2024-11-28 02:07:49,287 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 02:07:49,560 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-28 02:07:49,562 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-28 02:07:49,885 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-28 02:07:49,885 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [804668501] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-28 02:07:49,885 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-28 02:07:49,885 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12, 12] total 32 [2024-11-28 02:07:49,885 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1262808058] [2024-11-28 02:07:49,886 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-28 02:07:49,886 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2024-11-28 02:07:49,886 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 02:07:49,887 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2024-11-28 02:07:49,887 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=216, Invalid=840, Unknown=0, NotChecked=0, Total=1056 [2024-11-28 02:07:49,892 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 22 [2024-11-28 02:07:49,893 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 439 places, 751 transitions, 14386 flow. Second operand has 33 states, 33 states have (on average 4.484848484848484) internal successors, (148), 33 states have internal predecessors, (148), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 02:07:49,893 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-28 02:07:49,893 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 22 [2024-11-28 02:07:49,893 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-28 02:07:51,378 INFO L124 PetriNetUnfolderBase]: 1628/3054 cut-off events. [2024-11-28 02:07:51,378 INFO L125 PetriNetUnfolderBase]: For 108664/108664 co-relation queries the response was YES. [2024-11-28 02:07:51,405 INFO L83 FinitePrefix]: Finished finitePrefix Result has 29209 conditions, 3054 events. 1628/3054 cut-off events. For 108664/108664 co-relation queries the response was YES. Maximal size of possible extension queue 211. Compared 19594 event pairs, 49 based on Foata normal form. 19/3073 useless extension candidates. Maximal degree in co-relation 29082. Up to 1286 conditions per place. [2024-11-28 02:07:51,416 INFO L140 encePairwiseOnDemand]: 10/22 looper letters, 378 selfloop transitions, 438 changer transitions 19/836 dead transitions. [2024-11-28 02:07:51,416 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 458 places, 836 transitions, 17245 flow [2024-11-28 02:07:51,416 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2024-11-28 02:07:51,416 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23 states. [2024-11-28 02:07:51,417 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 203 transitions. [2024-11-28 02:07:51,417 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.40118577075098816 [2024-11-28 02:07:51,417 INFO L175 Difference]: Start difference. First operand has 439 places, 751 transitions, 14386 flow. Second operand 23 states and 203 transitions. [2024-11-28 02:07:51,417 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 458 places, 836 transitions, 17245 flow [2024-11-28 02:07:52,064 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 432 places, 836 transitions, 16770 flow, removed 145 selfloop flow, removed 26 redundant places. [2024-11-28 02:07:52,077 INFO L231 Difference]: Finished difference. Result has 437 places, 767 transitions, 15558 flow [2024-11-28 02:07:52,078 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=22, PETRI_DIFFERENCE_MINUEND_FLOW=13915, PETRI_DIFFERENCE_MINUEND_PLACES=410, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=751, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=419, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=324, PETRI_DIFFERENCE_SUBTRAHEND_STATES=23, PETRI_FLOW=15558, PETRI_PLACES=437, PETRI_TRANSITIONS=767} [2024-11-28 02:07:52,078 INFO L279 CegarLoopForPetriNet]: 24 programPoint places, 413 predicate places. [2024-11-28 02:07:52,078 INFO L471 AbstractCegarLoop]: Abstraction has has 437 places, 767 transitions, 15558 flow [2024-11-28 02:07:52,078 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 33 states have (on average 4.484848484848484) internal successors, (148), 33 states have internal predecessors, (148), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 02:07:52,078 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-28 02:07:52,079 INFO L206 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 02:07:52,085 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4c6a019f-02cd-4563-9ada-3009abc1415a/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Ended with exit code 0 [2024-11-28 02:07:52,279 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22,11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4c6a019f-02cd-4563-9ada-3009abc1415a/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 02:07:52,279 INFO L396 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-11-28 02:07:52,279 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 02:07:52,279 INFO L85 PathProgramCache]: Analyzing trace with hash -919342931, now seen corresponding path program 17 times [2024-11-28 02:07:52,280 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 02:07:52,280 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1952387673] [2024-11-28 02:07:52,280 INFO L95 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-11-28 02:07:52,280 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 02:07:52,285 INFO L229 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-28 02:07:52,286 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 02:07:52,518 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-28 02:07:52,518 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 02:07:52,518 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1952387673] [2024-11-28 02:07:52,518 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1952387673] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-28 02:07:52,519 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [109322] [2024-11-28 02:07:52,519 INFO L95 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-11-28 02:07:52,519 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 02:07:52,519 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4c6a019f-02cd-4563-9ada-3009abc1415a/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 02:07:52,521 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4c6a019f-02cd-4563-9ada-3009abc1415a/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 02:07:52,524 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4c6a019f-02cd-4563-9ada-3009abc1415a/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2024-11-28 02:07:52,567 INFO L229 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-28 02:07:52,567 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 02:07:52,568 INFO L256 TraceCheckSpWp]: Trace formula consists of 103 conjuncts, 21 conjuncts are in the unsatisfiable core [2024-11-28 02:07:52,569 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 02:07:52,938 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-28 02:07:52,938 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-28 02:07:53,288 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-28 02:07:53,288 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [109322] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-28 02:07:53,288 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-28 02:07:53,288 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11, 11] total 29 [2024-11-28 02:07:53,289 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1625943464] [2024-11-28 02:07:53,289 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-28 02:07:53,289 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2024-11-28 02:07:53,289 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 02:07:53,290 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2024-11-28 02:07:53,290 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=131, Invalid=739, Unknown=0, NotChecked=0, Total=870 [2024-11-28 02:07:53,298 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 22 [2024-11-28 02:07:53,298 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 437 places, 767 transitions, 15558 flow. Second operand has 30 states, 30 states have (on average 4.733333333333333) internal successors, (142), 30 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 02:07:53,298 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-28 02:07:53,299 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 22 [2024-11-28 02:07:53,299 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-28 02:07:59,713 INFO L124 PetriNetUnfolderBase]: 3089/5680 cut-off events. [2024-11-28 02:07:59,713 INFO L125 PetriNetUnfolderBase]: For 249843/249843 co-relation queries the response was YES. [2024-11-28 02:07:59,966 INFO L83 FinitePrefix]: Finished finitePrefix Result has 58289 conditions, 5680 events. 3089/5680 cut-off events. For 249843/249843 co-relation queries the response was YES. Maximal size of possible extension queue 351. Compared 39706 event pairs, 109 based on Foata normal form. 46/5726 useless extension candidates. Maximal degree in co-relation 58164. Up to 1522 conditions per place. [2024-11-28 02:07:59,985 INFO L140 encePairwiseOnDemand]: 9/22 looper letters, 447 selfloop transitions, 1192 changer transitions 24/1664 dead transitions. [2024-11-28 02:07:59,985 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 538 places, 1664 transitions, 36139 flow [2024-11-28 02:07:59,986 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 113 states. [2024-11-28 02:07:59,986 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 113 states. [2024-11-28 02:07:59,987 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 113 states to 113 states and 910 transitions. [2024-11-28 02:07:59,988 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.3660498793242156 [2024-11-28 02:07:59,988 INFO L175 Difference]: Start difference. First operand has 437 places, 767 transitions, 15558 flow. Second operand 113 states and 910 transitions. [2024-11-28 02:07:59,988 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 538 places, 1664 transitions, 36139 flow [2024-11-28 02:08:01,440 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 524 places, 1664 transitions, 35683 flow, removed 161 selfloop flow, removed 14 redundant places. [2024-11-28 02:08:01,461 INFO L231 Difference]: Finished difference. Result has 572 places, 1388 transitions, 32533 flow [2024-11-28 02:08:01,462 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=22, PETRI_DIFFERENCE_MINUEND_FLOW=15309, PETRI_DIFFERENCE_MINUEND_PLACES=412, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=762, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=628, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=89, PETRI_DIFFERENCE_SUBTRAHEND_STATES=113, PETRI_FLOW=32533, PETRI_PLACES=572, PETRI_TRANSITIONS=1388} [2024-11-28 02:08:01,462 INFO L279 CegarLoopForPetriNet]: 24 programPoint places, 548 predicate places. [2024-11-28 02:08:01,462 INFO L471 AbstractCegarLoop]: Abstraction has has 572 places, 1388 transitions, 32533 flow [2024-11-28 02:08:01,462 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 4.733333333333333) internal successors, (142), 30 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 02:08:01,463 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-28 02:08:01,463 INFO L206 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 02:08:01,470 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4c6a019f-02cd-4563-9ada-3009abc1415a/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Ended with exit code 0 [2024-11-28 02:08:01,663 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4c6a019f-02cd-4563-9ada-3009abc1415a/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable23 [2024-11-28 02:08:01,663 INFO L396 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-11-28 02:08:01,664 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 02:08:01,664 INFO L85 PathProgramCache]: Analyzing trace with hash -1576108695, now seen corresponding path program 18 times [2024-11-28 02:08:01,664 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 02:08:01,664 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [174672541] [2024-11-28 02:08:01,664 INFO L95 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2024-11-28 02:08:01,664 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 02:08:01,670 INFO L229 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2024-11-28 02:08:01,670 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 02:08:01,895 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-28 02:08:01,895 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 02:08:01,896 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [174672541] [2024-11-28 02:08:01,896 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [174672541] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-28 02:08:01,896 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [986037243] [2024-11-28 02:08:01,896 INFO L95 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2024-11-28 02:08:01,896 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 02:08:01,896 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4c6a019f-02cd-4563-9ada-3009abc1415a/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 02:08:01,898 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4c6a019f-02cd-4563-9ada-3009abc1415a/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 02:08:01,901 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4c6a019f-02cd-4563-9ada-3009abc1415a/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2024-11-28 02:08:01,946 INFO L229 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2024-11-28 02:08:01,947 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 02:08:01,948 INFO L256 TraceCheckSpWp]: Trace formula consists of 103 conjuncts, 21 conjuncts are in the unsatisfiable core [2024-11-28 02:08:01,949 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 02:08:02,291 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-28 02:08:02,291 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-28 02:08:02,605 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-28 02:08:02,605 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [986037243] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-28 02:08:02,605 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-28 02:08:02,605 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 30 [2024-11-28 02:08:02,606 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [214716116] [2024-11-28 02:08:02,606 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-28 02:08:02,606 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2024-11-28 02:08:02,606 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 02:08:02,607 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2024-11-28 02:08:02,607 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=132, Invalid=798, Unknown=0, NotChecked=0, Total=930 [2024-11-28 02:08:02,638 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 22 [2024-11-28 02:08:02,638 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 572 places, 1388 transitions, 32533 flow. Second operand has 31 states, 31 states have (on average 4.67741935483871) internal successors, (145), 31 states have internal predecessors, (145), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 02:08:02,638 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-28 02:08:02,639 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 22 [2024-11-28 02:08:02,639 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-28 02:08:13,052 INFO L124 PetriNetUnfolderBase]: 5728/10216 cut-off events. [2024-11-28 02:08:13,052 INFO L125 PetriNetUnfolderBase]: For 818134/818134 co-relation queries the response was YES. [2024-11-28 02:08:13,421 INFO L83 FinitePrefix]: Finished finitePrefix Result has 126544 conditions, 10216 events. 5728/10216 cut-off events. For 818134/818134 co-relation queries the response was YES. Maximal size of possible extension queue 616. Compared 76161 event pairs, 103 based on Foata normal form. 4/10220 useless extension candidates. Maximal degree in co-relation 126375. Up to 3160 conditions per place. [2024-11-28 02:08:13,461 INFO L140 encePairwiseOnDemand]: 9/22 looper letters, 648 selfloop transitions, 2101 changer transitions 13/2763 dead transitions. [2024-11-28 02:08:13,461 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 685 places, 2763 transitions, 69560 flow [2024-11-28 02:08:13,461 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 121 states. [2024-11-28 02:08:13,461 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 121 states. [2024-11-28 02:08:13,463 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 121 states to 121 states and 997 transitions. [2024-11-28 02:08:13,463 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.3745304282494365 [2024-11-28 02:08:13,463 INFO L175 Difference]: Start difference. First operand has 572 places, 1388 transitions, 32533 flow. Second operand 121 states and 997 transitions. [2024-11-28 02:08:13,463 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 685 places, 2763 transitions, 69560 flow [2024-11-28 02:08:20,439 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 662 places, 2763 transitions, 66859 flow, removed 1258 selfloop flow, removed 23 redundant places. [2024-11-28 02:08:20,498 INFO L231 Difference]: Finished difference. Result has 705 places, 2453 transitions, 62190 flow [2024-11-28 02:08:20,499 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=22, PETRI_DIFFERENCE_MINUEND_FLOW=31148, PETRI_DIFFERENCE_MINUEND_PLACES=542, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1387, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1118, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=173, PETRI_DIFFERENCE_SUBTRAHEND_STATES=121, PETRI_FLOW=62190, PETRI_PLACES=705, PETRI_TRANSITIONS=2453} [2024-11-28 02:08:20,499 INFO L279 CegarLoopForPetriNet]: 24 programPoint places, 681 predicate places. [2024-11-28 02:08:20,500 INFO L471 AbstractCegarLoop]: Abstraction has has 705 places, 2453 transitions, 62190 flow [2024-11-28 02:08:20,500 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 31 states have (on average 4.67741935483871) internal successors, (145), 31 states have internal predecessors, (145), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 02:08:20,500 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-28 02:08:20,500 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 02:08:20,505 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4c6a019f-02cd-4563-9ada-3009abc1415a/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Ended with exit code 0 [2024-11-28 02:08:20,700 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4c6a019f-02cd-4563-9ada-3009abc1415a/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable24 [2024-11-28 02:08:20,701 INFO L396 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-11-28 02:08:20,701 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 02:08:20,701 INFO L85 PathProgramCache]: Analyzing trace with hash 549646006, now seen corresponding path program 2 times [2024-11-28 02:08:20,701 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 02:08:20,701 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1033364927] [2024-11-28 02:08:20,701 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-28 02:08:20,701 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 02:08:20,710 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-28 02:08:20,710 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 02:08:20,914 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-28 02:08:20,915 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 02:08:20,915 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1033364927] [2024-11-28 02:08:20,915 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1033364927] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-28 02:08:20,915 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1744295478] [2024-11-28 02:08:20,915 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-28 02:08:20,915 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 02:08:20,915 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4c6a019f-02cd-4563-9ada-3009abc1415a/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 02:08:20,917 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4c6a019f-02cd-4563-9ada-3009abc1415a/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 02:08:20,918 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4c6a019f-02cd-4563-9ada-3009abc1415a/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2024-11-28 02:08:20,961 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-28 02:08:20,962 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 02:08:20,962 INFO L256 TraceCheckSpWp]: Trace formula consists of 104 conjuncts, 19 conjuncts are in the unsatisfiable core [2024-11-28 02:08:20,963 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 02:08:21,209 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-28 02:08:21,210 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-28 02:08:21,453 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-28 02:08:21,453 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1744295478] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-28 02:08:21,454 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-28 02:08:21,454 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12, 12] total 32 [2024-11-28 02:08:21,454 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [469778579] [2024-11-28 02:08:21,454 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-28 02:08:21,454 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2024-11-28 02:08:21,454 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 02:08:21,455 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2024-11-28 02:08:21,455 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=208, Invalid=848, Unknown=0, NotChecked=0, Total=1056 [2024-11-28 02:08:21,461 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 22 [2024-11-28 02:08:21,461 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 705 places, 2453 transitions, 62190 flow. Second operand has 33 states, 33 states have (on average 4.424242424242424) internal successors, (146), 33 states have internal predecessors, (146), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 02:08:21,462 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-28 02:08:21,462 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 22 [2024-11-28 02:08:21,462 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-28 02:08:30,670 INFO L124 PetriNetUnfolderBase]: 5878/10538 cut-off events. [2024-11-28 02:08:30,670 INFO L125 PetriNetUnfolderBase]: For 1034265/1034265 co-relation queries the response was YES. [2024-11-28 02:08:30,888 INFO L83 FinitePrefix]: Finished finitePrefix Result has 140497 conditions, 10538 events. 5878/10538 cut-off events. For 1034265/1034265 co-relation queries the response was YES. Maximal size of possible extension queue 668. Compared 79293 event pairs, 190 based on Foata normal form. 2/10540 useless extension candidates. Maximal degree in co-relation 140295. Up to 6149 conditions per place. [2024-11-28 02:08:30,930 INFO L140 encePairwiseOnDemand]: 9/22 looper letters, 1056 selfloop transitions, 1582 changer transitions 23/2662 dead transitions. [2024-11-28 02:08:30,931 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 737 places, 2662 transitions, 72993 flow [2024-11-28 02:08:30,931 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2024-11-28 02:08:30,931 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 36 states. [2024-11-28 02:08:30,932 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 291 transitions. [2024-11-28 02:08:30,932 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.36742424242424243 [2024-11-28 02:08:30,932 INFO L175 Difference]: Start difference. First operand has 705 places, 2453 transitions, 62190 flow. Second operand 36 states and 291 transitions. [2024-11-28 02:08:30,932 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 737 places, 2662 transitions, 72993 flow [2024-11-28 02:08:40,128 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 711 places, 2662 transitions, 71628 flow, removed 586 selfloop flow, removed 26 redundant places. [2024-11-28 02:08:40,202 INFO L231 Difference]: Finished difference. Result has 714 places, 2572 transitions, 68637 flow [2024-11-28 02:08:40,204 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=22, PETRI_DIFFERENCE_MINUEND_FLOW=60848, PETRI_DIFFERENCE_MINUEND_PLACES=676, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=2453, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1453, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=995, PETRI_DIFFERENCE_SUBTRAHEND_STATES=36, PETRI_FLOW=68637, PETRI_PLACES=714, PETRI_TRANSITIONS=2572} [2024-11-28 02:08:40,204 INFO L279 CegarLoopForPetriNet]: 24 programPoint places, 690 predicate places. [2024-11-28 02:08:40,204 INFO L471 AbstractCegarLoop]: Abstraction has has 714 places, 2572 transitions, 68637 flow [2024-11-28 02:08:40,205 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 33 states have (on average 4.424242424242424) internal successors, (146), 33 states have internal predecessors, (146), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 02:08:40,205 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-28 02:08:40,205 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 02:08:40,214 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4c6a019f-02cd-4563-9ada-3009abc1415a/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Ended with exit code 0 [2024-11-28 02:08:40,405 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4c6a019f-02cd-4563-9ada-3009abc1415a/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable25 [2024-11-28 02:08:40,406 INFO L396 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-11-28 02:08:40,406 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 02:08:40,406 INFO L85 PathProgramCache]: Analyzing trace with hash -1624506186, now seen corresponding path program 3 times [2024-11-28 02:08:40,406 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 02:08:40,406 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2063526097] [2024-11-28 02:08:40,406 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-28 02:08:40,407 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 02:08:40,414 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2024-11-28 02:08:40,414 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 02:08:40,668 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-28 02:08:40,668 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 02:08:40,668 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2063526097] [2024-11-28 02:08:40,668 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2063526097] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-28 02:08:40,669 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2029130841] [2024-11-28 02:08:40,669 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-28 02:08:40,669 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 02:08:40,669 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4c6a019f-02cd-4563-9ada-3009abc1415a/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 02:08:40,670 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4c6a019f-02cd-4563-9ada-3009abc1415a/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 02:08:40,672 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4c6a019f-02cd-4563-9ada-3009abc1415a/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2024-11-28 02:08:40,716 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2024-11-28 02:08:40,716 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 02:08:40,717 INFO L256 TraceCheckSpWp]: Trace formula consists of 104 conjuncts, 19 conjuncts are in the unsatisfiable core [2024-11-28 02:08:40,718 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 02:08:41,016 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-28 02:08:41,017 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-28 02:08:41,304 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-28 02:08:41,304 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2029130841] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-28 02:08:41,305 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-28 02:08:41,305 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12, 12] total 32 [2024-11-28 02:08:41,305 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2135931032] [2024-11-28 02:08:41,305 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-28 02:08:41,305 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2024-11-28 02:08:41,305 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 02:08:41,306 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2024-11-28 02:08:41,306 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=224, Invalid=832, Unknown=0, NotChecked=0, Total=1056 [2024-11-28 02:08:41,310 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 22 [2024-11-28 02:08:41,311 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 714 places, 2572 transitions, 68637 flow. Second operand has 33 states, 33 states have (on average 4.393939393939394) internal successors, (145), 33 states have internal predecessors, (145), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 02:08:41,311 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-28 02:08:41,311 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 22 [2024-11-28 02:08:41,311 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-28 02:08:54,229 INFO L124 PetriNetUnfolderBase]: 6506/11596 cut-off events. [2024-11-28 02:08:54,229 INFO L125 PetriNetUnfolderBase]: For 1234425/1234425 co-relation queries the response was YES. [2024-11-28 02:08:54,490 INFO L83 FinitePrefix]: Finished finitePrefix Result has 159042 conditions, 11596 events. 6506/11596 cut-off events. For 1234425/1234425 co-relation queries the response was YES. Maximal size of possible extension queue 693. Compared 87821 event pairs, 143 based on Foata normal form. 2/11598 useless extension candidates. Maximal degree in co-relation 158850. Up to 4874 conditions per place. [2024-11-28 02:08:54,542 INFO L140 encePairwiseOnDemand]: 9/22 looper letters, 1045 selfloop transitions, 2145 changer transitions 6/3197 dead transitions. [2024-11-28 02:08:54,542 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 775 places, 3197 transitions, 89158 flow [2024-11-28 02:08:54,542 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 67 states. [2024-11-28 02:08:54,542 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 67 states. [2024-11-28 02:08:54,543 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67 states to 67 states and 513 transitions. [2024-11-28 02:08:54,543 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.3480325644504749 [2024-11-28 02:08:54,543 INFO L175 Difference]: Start difference. First operand has 714 places, 2572 transitions, 68637 flow. Second operand 67 states and 513 transitions. [2024-11-28 02:08:54,543 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 775 places, 3197 transitions, 89158 flow [2024-11-28 02:09:07,367 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 746 places, 3197 transitions, 85130 flow, removed 194 selfloop flow, removed 29 redundant places. [2024-11-28 02:09:07,449 INFO L231 Difference]: Finished difference. Result has 765 places, 3048 transitions, 83740 flow [2024-11-28 02:09:07,450 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=22, PETRI_DIFFERENCE_MINUEND_FLOW=65358, PETRI_DIFFERENCE_MINUEND_PLACES=680, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=2572, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1741, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=743, PETRI_DIFFERENCE_SUBTRAHEND_STATES=67, PETRI_FLOW=83740, PETRI_PLACES=765, PETRI_TRANSITIONS=3048} [2024-11-28 02:09:07,451 INFO L279 CegarLoopForPetriNet]: 24 programPoint places, 741 predicate places. [2024-11-28 02:09:07,451 INFO L471 AbstractCegarLoop]: Abstraction has has 765 places, 3048 transitions, 83740 flow [2024-11-28 02:09:07,451 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 33 states have (on average 4.393939393939394) internal successors, (145), 33 states have internal predecessors, (145), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 02:09:07,451 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-28 02:09:07,451 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 02:09:07,458 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4c6a019f-02cd-4563-9ada-3009abc1415a/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2024-11-28 02:09:07,652 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4c6a019f-02cd-4563-9ada-3009abc1415a/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2024-11-28 02:09:07,652 INFO L396 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-11-28 02:09:07,652 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 02:09:07,653 INFO L85 PathProgramCache]: Analyzing trace with hash 980970062, now seen corresponding path program 4 times [2024-11-28 02:09:07,653 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 02:09:07,653 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1253011025] [2024-11-28 02:09:07,653 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-11-28 02:09:07,653 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 02:09:07,660 INFO L229 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-11-28 02:09:07,660 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 02:09:07,854 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-28 02:09:07,855 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 02:09:07,855 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1253011025] [2024-11-28 02:09:07,855 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1253011025] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-28 02:09:07,855 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [155032303] [2024-11-28 02:09:07,855 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-11-28 02:09:07,855 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 02:09:07,855 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4c6a019f-02cd-4563-9ada-3009abc1415a/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 02:09:07,857 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4c6a019f-02cd-4563-9ada-3009abc1415a/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 02:09:07,858 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4c6a019f-02cd-4563-9ada-3009abc1415a/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2024-11-28 02:09:07,905 INFO L229 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-11-28 02:09:07,905 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 02:09:07,906 INFO L256 TraceCheckSpWp]: Trace formula consists of 104 conjuncts, 21 conjuncts are in the unsatisfiable core [2024-11-28 02:09:07,907 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 02:09:08,225 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-28 02:09:08,225 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-28 02:09:08,487 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-28 02:09:08,488 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [155032303] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-28 02:09:08,488 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-28 02:09:08,488 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12, 12] total 32 [2024-11-28 02:09:08,488 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [780294167] [2024-11-28 02:09:08,488 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-28 02:09:08,488 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2024-11-28 02:09:08,489 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 02:09:08,489 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2024-11-28 02:09:08,490 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=152, Invalid=904, Unknown=0, NotChecked=0, Total=1056 [2024-11-28 02:09:08,494 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 22 [2024-11-28 02:09:08,495 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 765 places, 3048 transitions, 83740 flow. Second operand has 33 states, 33 states have (on average 4.424242424242424) internal successors, (146), 33 states have internal predecessors, (146), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 02:09:08,495 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-28 02:09:08,495 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 22 [2024-11-28 02:09:08,495 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-28 02:09:22,947 INFO L124 PetriNetUnfolderBase]: 6579/11725 cut-off events. [2024-11-28 02:09:22,947 INFO L125 PetriNetUnfolderBase]: For 1187568/1187568 co-relation queries the response was YES. [2024-11-28 02:09:23,288 INFO L83 FinitePrefix]: Finished finitePrefix Result has 162242 conditions, 11725 events. 6579/11725 cut-off events. For 1187568/1187568 co-relation queries the response was YES. Maximal size of possible extension queue 701. Compared 88915 event pairs, 158 based on Foata normal form. 3/11728 useless extension candidates. Maximal degree in co-relation 162037. Up to 6631 conditions per place. [2024-11-28 02:09:23,344 INFO L140 encePairwiseOnDemand]: 9/22 looper letters, 1252 selfloop transitions, 1938 changer transitions 23/3214 dead transitions. [2024-11-28 02:09:23,344 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 822 places, 3214 transitions, 93647 flow [2024-11-28 02:09:23,503 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 59 states. [2024-11-28 02:09:23,503 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 59 states. [2024-11-28 02:09:23,504 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 450 transitions. [2024-11-28 02:09:23,504 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.34668721109399075 [2024-11-28 02:09:23,504 INFO L175 Difference]: Start difference. First operand has 765 places, 3048 transitions, 83740 flow. Second operand 59 states and 450 transitions. [2024-11-28 02:09:23,504 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 822 places, 3214 transitions, 93647 flow [2024-11-28 02:09:44,375 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 800 places, 3214 transitions, 89298 flow, removed 946 selfloop flow, removed 22 redundant places. [2024-11-28 02:09:44,435 INFO L231 Difference]: Finished difference. Result has 813 places, 3087 transitions, 84977 flow [2024-11-28 02:09:44,437 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=22, PETRI_DIFFERENCE_MINUEND_FLOW=79958, PETRI_DIFFERENCE_MINUEND_PLACES=742, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=3048, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1892, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=1143, PETRI_DIFFERENCE_SUBTRAHEND_STATES=59, PETRI_FLOW=84977, PETRI_PLACES=813, PETRI_TRANSITIONS=3087} [2024-11-28 02:09:44,437 INFO L279 CegarLoopForPetriNet]: 24 programPoint places, 789 predicate places. [2024-11-28 02:09:44,437 INFO L471 AbstractCegarLoop]: Abstraction has has 813 places, 3087 transitions, 84977 flow [2024-11-28 02:09:44,438 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 33 states have (on average 4.424242424242424) internal successors, (146), 33 states have internal predecessors, (146), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 02:09:44,438 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-28 02:09:44,438 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 02:09:44,447 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4c6a019f-02cd-4563-9ada-3009abc1415a/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Ended with exit code 0 [2024-11-28 02:09:44,638 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4c6a019f-02cd-4563-9ada-3009abc1415a/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27 [2024-11-28 02:09:44,638 INFO L396 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-11-28 02:09:44,639 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 02:09:44,639 INFO L85 PathProgramCache]: Analyzing trace with hash 959562806, now seen corresponding path program 5 times [2024-11-28 02:09:44,639 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 02:09:44,639 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [957005074] [2024-11-28 02:09:44,639 INFO L95 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-11-28 02:09:44,639 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 02:09:44,642 INFO L229 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-28 02:09:44,642 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 02:09:44,861 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-28 02:09:44,861 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 02:09:44,861 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [957005074] [2024-11-28 02:09:44,861 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [957005074] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-28 02:09:44,861 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1475614195] [2024-11-28 02:09:44,861 INFO L95 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-11-28 02:09:44,861 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 02:09:44,861 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4c6a019f-02cd-4563-9ada-3009abc1415a/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 02:09:44,863 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4c6a019f-02cd-4563-9ada-3009abc1415a/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 02:09:44,864 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4c6a019f-02cd-4563-9ada-3009abc1415a/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2024-11-28 02:09:44,912 INFO L229 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-28 02:09:44,912 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 02:09:44,913 INFO L256 TraceCheckSpWp]: Trace formula consists of 104 conjuncts, 21 conjuncts are in the unsatisfiable core [2024-11-28 02:09:44,915 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 02:09:45,170 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-28 02:09:45,170 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-28 02:09:45,387 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-28 02:09:45,387 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1475614195] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-28 02:09:45,387 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-28 02:09:45,387 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12, 12] total 32 [2024-11-28 02:09:45,387 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2069854887] [2024-11-28 02:09:45,387 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-28 02:09:45,387 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2024-11-28 02:09:45,388 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 02:09:45,388 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2024-11-28 02:09:45,388 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=155, Invalid=901, Unknown=0, NotChecked=0, Total=1056 [2024-11-28 02:09:45,392 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 22 [2024-11-28 02:09:45,393 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 813 places, 3087 transitions, 84977 flow. Second operand has 33 states, 33 states have (on average 4.424242424242424) internal successors, (146), 33 states have internal predecessors, (146), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 02:09:45,393 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-28 02:09:45,393 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 22 [2024-11-28 02:09:45,393 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-28 02:09:58,928 INFO L124 PetriNetUnfolderBase]: 6816/12135 cut-off events. [2024-11-28 02:09:58,928 INFO L125 PetriNetUnfolderBase]: For 1003013/1003013 co-relation queries the response was YES. [2024-11-28 02:09:59,469 INFO L83 FinitePrefix]: Finished finitePrefix Result has 159005 conditions, 12135 events. 6816/12135 cut-off events. For 1003013/1003013 co-relation queries the response was YES. Maximal size of possible extension queue 726. Compared 92765 event pairs, 147 based on Foata normal form. 5/12140 useless extension candidates. Maximal degree in co-relation 158792. Up to 5262 conditions per place. [2024-11-28 02:09:59,522 INFO L140 encePairwiseOnDemand]: 9/22 looper letters, 1040 selfloop transitions, 2297 changer transitions 26/3364 dead transitions. [2024-11-28 02:09:59,522 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 880 places, 3364 transitions, 97198 flow [2024-11-28 02:09:59,523 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 74 states. [2024-11-28 02:09:59,523 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 74 states. [2024-11-28 02:09:59,524 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74 states to 74 states and 558 transitions. [2024-11-28 02:09:59,524 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.34275184275184273 [2024-11-28 02:09:59,524 INFO L175 Difference]: Start difference. First operand has 813 places, 3087 transitions, 84977 flow. Second operand 74 states and 558 transitions. [2024-11-28 02:09:59,524 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 880 places, 3364 transitions, 97198 flow [2024-11-28 02:10:12,839 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 859 places, 3364 transitions, 96083 flow, removed 91 selfloop flow, removed 21 redundant places. [2024-11-28 02:10:12,905 INFO L231 Difference]: Finished difference. Result has 873 places, 3189 transitions, 94307 flow [2024-11-28 02:10:12,907 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=22, PETRI_DIFFERENCE_MINUEND_FLOW=83956, PETRI_DIFFERENCE_MINUEND_PLACES=786, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=3087, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2183, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=840, PETRI_DIFFERENCE_SUBTRAHEND_STATES=74, PETRI_FLOW=94307, PETRI_PLACES=873, PETRI_TRANSITIONS=3189} [2024-11-28 02:10:12,907 INFO L279 CegarLoopForPetriNet]: 24 programPoint places, 849 predicate places. [2024-11-28 02:10:12,907 INFO L471 AbstractCegarLoop]: Abstraction has has 873 places, 3189 transitions, 94307 flow [2024-11-28 02:10:12,908 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 33 states have (on average 4.424242424242424) internal successors, (146), 33 states have internal predecessors, (146), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 02:10:12,908 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-28 02:10:12,908 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 02:10:12,914 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4c6a019f-02cd-4563-9ada-3009abc1415a/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Ended with exit code 0 [2024-11-28 02:10:13,108 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4c6a019f-02cd-4563-9ada-3009abc1415a/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2024-11-28 02:10:13,108 INFO L396 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-11-28 02:10:13,109 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 02:10:13,109 INFO L85 PathProgramCache]: Analyzing trace with hash 284972206, now seen corresponding path program 6 times [2024-11-28 02:10:13,109 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 02:10:13,109 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [498869258] [2024-11-28 02:10:13,109 INFO L95 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2024-11-28 02:10:13,109 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 02:10:13,113 INFO L229 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2024-11-28 02:10:13,113 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 02:10:13,319 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-28 02:10:13,319 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 02:10:13,319 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [498869258] [2024-11-28 02:10:13,319 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [498869258] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-28 02:10:13,319 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [778639909] [2024-11-28 02:10:13,319 INFO L95 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2024-11-28 02:10:13,319 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 02:10:13,320 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4c6a019f-02cd-4563-9ada-3009abc1415a/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 02:10:13,321 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4c6a019f-02cd-4563-9ada-3009abc1415a/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 02:10:13,322 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4c6a019f-02cd-4563-9ada-3009abc1415a/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2024-11-28 02:10:13,364 INFO L229 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2024-11-28 02:10:13,364 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 02:10:13,365 INFO L256 TraceCheckSpWp]: Trace formula consists of 104 conjuncts, 19 conjuncts are in the unsatisfiable core [2024-11-28 02:10:13,366 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 02:10:13,605 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-28 02:10:13,605 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-28 02:10:13,851 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-28 02:10:13,852 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [778639909] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-28 02:10:13,852 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-28 02:10:13,852 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12, 12] total 32 [2024-11-28 02:10:13,852 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1814750137] [2024-11-28 02:10:13,852 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-28 02:10:13,852 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2024-11-28 02:10:13,853 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 02:10:13,853 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2024-11-28 02:10:13,853 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=219, Invalid=837, Unknown=0, NotChecked=0, Total=1056 [2024-11-28 02:10:13,856 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 22 [2024-11-28 02:10:13,856 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 873 places, 3189 transitions, 94307 flow. Second operand has 33 states, 33 states have (on average 4.393939393939394) internal successors, (145), 33 states have internal predecessors, (145), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 02:10:13,856 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-28 02:10:13,856 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 22 [2024-11-28 02:10:13,856 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand