./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/weaver/popl20-more-nonblocking-counter-alt2.wvr.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version a0165632 Calling Ultimate with: /usr/lib/jvm/java-11-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99ffcebf-1f54-45dd-a3df-c0bad0542d47/bin/uautomizer-verify-jihMAELWvX/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99ffcebf-1f54-45dd-a3df-c0bad0542d47/bin/uautomizer-verify-jihMAELWvX/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99ffcebf-1f54-45dd-a3df-c0bad0542d47/bin/uautomizer-verify-jihMAELWvX/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99ffcebf-1f54-45dd-a3df-c0bad0542d47/bin/uautomizer-verify-jihMAELWvX/config/AutomizerReach.xml -i ../../sv-benchmarks/c/weaver/popl20-more-nonblocking-counter-alt2.wvr.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99ffcebf-1f54-45dd-a3df-c0bad0542d47/bin/uautomizer-verify-jihMAELWvX/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99ffcebf-1f54-45dd-a3df-c0bad0542d47/bin/uautomizer-verify-jihMAELWvX --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 87e1a1d3acb3ee9b7a4a97eb7b14df31d5b38b7566b1218cea0dabfe5ec8ddbd --- Real Ultimate output --- This is Ultimate 0.2.5-dev-a016563 [2024-11-08 17:56:03,275 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-11-08 17:56:03,377 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99ffcebf-1f54-45dd-a3df-c0bad0542d47/bin/uautomizer-verify-jihMAELWvX/config/svcomp-Reach-32bit-Automizer_Default.epf [2024-11-08 17:56:03,384 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-11-08 17:56:03,387 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-11-08 17:56:03,434 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-11-08 17:56:03,434 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-11-08 17:56:03,434 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-11-08 17:56:03,435 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-11-08 17:56:03,435 INFO L153 SettingsManager]: * Use memory slicer=true [2024-11-08 17:56:03,436 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-11-08 17:56:03,436 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-11-08 17:56:03,437 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-11-08 17:56:03,437 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-11-08 17:56:03,438 INFO L153 SettingsManager]: * Use SBE=true [2024-11-08 17:56:03,438 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-11-08 17:56:03,438 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-11-08 17:56:03,439 INFO L153 SettingsManager]: * sizeof long=4 [2024-11-08 17:56:03,439 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-11-08 17:56:03,442 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-11-08 17:56:03,442 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-11-08 17:56:03,443 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-11-08 17:56:03,445 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-11-08 17:56:03,446 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-11-08 17:56:03,446 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-11-08 17:56:03,446 INFO L153 SettingsManager]: * sizeof long double=12 [2024-11-08 17:56:03,447 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-11-08 17:56:03,447 INFO L153 SettingsManager]: * Use constant arrays=true [2024-11-08 17:56:03,447 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-11-08 17:56:03,448 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-11-08 17:56:03,448 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-11-08 17:56:03,457 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-11-08 17:56:03,458 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-11-08 17:56:03,458 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-11-08 17:56:03,458 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-11-08 17:56:03,459 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-11-08 17:56:03,459 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-11-08 17:56:03,459 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-11-08 17:56:03,459 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-11-08 17:56:03,460 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-11-08 17:56:03,460 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-11-08 17:56:03,460 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-11-08 17:56:03,460 INFO L153 SettingsManager]: * Looper check in Petri net analysis=SEMANTIC WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99ffcebf-1f54-45dd-a3df-c0bad0542d47/bin/uautomizer-verify-jihMAELWvX/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99ffcebf-1f54-45dd-a3df-c0bad0542d47/bin/uautomizer-verify-jihMAELWvX Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 87e1a1d3acb3ee9b7a4a97eb7b14df31d5b38b7566b1218cea0dabfe5ec8ddbd [2024-11-08 17:56:03,741 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-11-08 17:56:03,773 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-11-08 17:56:03,780 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-11-08 17:56:03,801 INFO L270 PluginConnector]: Initializing CDTParser... [2024-11-08 17:56:03,803 INFO L274 PluginConnector]: CDTParser initialized [2024-11-08 17:56:03,804 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99ffcebf-1f54-45dd-a3df-c0bad0542d47/bin/uautomizer-verify-jihMAELWvX/../../sv-benchmarks/c/weaver/popl20-more-nonblocking-counter-alt2.wvr.c Unable to find full path for "g++" [2024-11-08 17:56:05,794 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-11-08 17:56:06,010 INFO L384 CDTParser]: Found 1 translation units. [2024-11-08 17:56:06,014 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99ffcebf-1f54-45dd-a3df-c0bad0542d47/sv-benchmarks/c/weaver/popl20-more-nonblocking-counter-alt2.wvr.c [2024-11-08 17:56:06,026 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99ffcebf-1f54-45dd-a3df-c0bad0542d47/bin/uautomizer-verify-jihMAELWvX/data/9c7a3aaee/cbee1388343e4f88859c9f4b6c685803/FLAGf873e6aba [2024-11-08 17:56:06,047 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99ffcebf-1f54-45dd-a3df-c0bad0542d47/bin/uautomizer-verify-jihMAELWvX/data/9c7a3aaee/cbee1388343e4f88859c9f4b6c685803 [2024-11-08 17:56:06,049 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-11-08 17:56:06,053 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2024-11-08 17:56:06,055 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-11-08 17:56:06,056 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-11-08 17:56:06,062 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-11-08 17:56:06,062 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 08.11 05:56:06" (1/1) ... [2024-11-08 17:56:06,064 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3f95ccad and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.11 05:56:06, skipping insertion in model container [2024-11-08 17:56:06,067 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 08.11 05:56:06" (1/1) ... [2024-11-08 17:56:06,129 INFO L175 MainTranslator]: Built tables and reachable declarations [2024-11-08 17:56:06,401 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_99ffcebf-1f54-45dd-a3df-c0bad0542d47/sv-benchmarks/c/weaver/popl20-more-nonblocking-counter-alt2.wvr.c[2173,2186] [2024-11-08 17:56:06,405 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-08 17:56:06,412 INFO L200 MainTranslator]: Completed pre-run [2024-11-08 17:56:06,433 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_99ffcebf-1f54-45dd-a3df-c0bad0542d47/sv-benchmarks/c/weaver/popl20-more-nonblocking-counter-alt2.wvr.c[2173,2186] [2024-11-08 17:56:06,433 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-08 17:56:06,450 INFO L204 MainTranslator]: Completed translation [2024-11-08 17:56:06,450 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.11 05:56:06 WrapperNode [2024-11-08 17:56:06,450 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-11-08 17:56:06,451 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-11-08 17:56:06,452 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-11-08 17:56:06,452 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-11-08 17:56:06,460 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.11 05:56:06" (1/1) ... [2024-11-08 17:56:06,466 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.11 05:56:06" (1/1) ... [2024-11-08 17:56:06,484 INFO L138 Inliner]: procedures = 20, calls = 14, calls flagged for inlining = 4, calls inlined = 4, statements flattened = 44 [2024-11-08 17:56:06,485 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-11-08 17:56:06,486 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-11-08 17:56:06,486 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-11-08 17:56:06,486 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-11-08 17:56:06,498 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.11 05:56:06" (1/1) ... [2024-11-08 17:56:06,498 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.11 05:56:06" (1/1) ... [2024-11-08 17:56:06,500 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.11 05:56:06" (1/1) ... [2024-11-08 17:56:06,513 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]. [2024-11-08 17:56:06,513 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.11 05:56:06" (1/1) ... [2024-11-08 17:56:06,513 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.11 05:56:06" (1/1) ... [2024-11-08 17:56:06,517 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.11 05:56:06" (1/1) ... [2024-11-08 17:56:06,520 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.11 05:56:06" (1/1) ... [2024-11-08 17:56:06,522 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.11 05:56:06" (1/1) ... [2024-11-08 17:56:06,523 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.11 05:56:06" (1/1) ... [2024-11-08 17:56:06,525 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-11-08 17:56:06,526 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-11-08 17:56:06,526 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-11-08 17:56:06,526 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-11-08 17:56:06,527 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.11 05:56:06" (1/1) ... [2024-11-08 17:56:06,537 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-11-08 17:56:06,548 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99ffcebf-1f54-45dd-a3df-c0bad0542d47/bin/uautomizer-verify-jihMAELWvX/z3 [2024-11-08 17:56:06,562 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99ffcebf-1f54-45dd-a3df-c0bad0542d47/bin/uautomizer-verify-jihMAELWvX/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (exit command is (exit), workingDir is null) [2024-11-08 17:56:06,565 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99ffcebf-1f54-45dd-a3df-c0bad0542d47/bin/uautomizer-verify-jihMAELWvX/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Waiting until timeout for monitored process [2024-11-08 17:56:06,600 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-11-08 17:56:06,600 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2024-11-08 17:56:06,601 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2024-11-08 17:56:06,601 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2024-11-08 17:56:06,601 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2024-11-08 17:56:06,601 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-11-08 17:56:06,601 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2024-11-08 17:56:06,601 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2024-11-08 17:56:06,602 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-11-08 17:56:06,602 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-11-08 17:56:06,606 WARN L207 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement. [2024-11-08 17:56:06,715 INFO L238 CfgBuilder]: Building ICFG [2024-11-08 17:56:06,718 INFO L264 CfgBuilder]: Building CFG for each procedure with an implementation [2024-11-08 17:56:06,959 INFO L283 CfgBuilder]: Omitted future-live optimization because the input is a concurrent program. [2024-11-08 17:56:06,960 INFO L287 CfgBuilder]: Performing block encoding [2024-11-08 17:56:07,120 INFO L311 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-11-08 17:56:07,120 INFO L316 CfgBuilder]: Removed 0 assume(true) statements. [2024-11-08 17:56:07,121 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 08.11 05:56:07 BoogieIcfgContainer [2024-11-08 17:56:07,121 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-11-08 17:56:07,124 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-11-08 17:56:07,124 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-11-08 17:56:07,128 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-11-08 17:56:07,128 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 08.11 05:56:06" (1/3) ... [2024-11-08 17:56:07,129 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@41e660d6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 08.11 05:56:07, skipping insertion in model container [2024-11-08 17:56:07,129 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.11 05:56:06" (2/3) ... [2024-11-08 17:56:07,129 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@41e660d6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 08.11 05:56:07, skipping insertion in model container [2024-11-08 17:56:07,129 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 08.11 05:56:07" (3/3) ... [2024-11-08 17:56:07,131 INFO L112 eAbstractionObserver]: Analyzing ICFG popl20-more-nonblocking-counter-alt2.wvr.c [2024-11-08 17:56:07,149 INFO L214 ceAbstractionStarter]: Automizer settings: Hoare:LoopHeads NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-11-08 17:56:07,150 INFO L154 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2024-11-08 17:56:07,150 INFO L489 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2024-11-08 17:56:07,207 INFO L143 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2024-11-08 17:56:07,243 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 30 places, 27 transitions, 68 flow [2024-11-08 17:56:07,271 INFO L124 PetriNetUnfolderBase]: 4/25 cut-off events. [2024-11-08 17:56:07,272 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2024-11-08 17:56:07,276 INFO L83 FinitePrefix]: Finished finitePrefix Result has 34 conditions, 25 events. 4/25 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 35 event pairs, 0 based on Foata normal form. 0/20 useless extension candidates. Maximal degree in co-relation 20. Up to 2 conditions per place. [2024-11-08 17:56:07,276 INFO L82 GeneralOperation]: Start removeDead. Operand has 30 places, 27 transitions, 68 flow [2024-11-08 17:56:07,284 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 27 places, 24 transitions, 60 flow [2024-11-08 17:56:07,303 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-11-08 17:56:07,311 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;@5a4d046b, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-11-08 17:56:07,311 INFO L334 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2024-11-08 17:56:07,333 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2024-11-08 17:56:07,333 INFO L124 PetriNetUnfolderBase]: 4/23 cut-off events. [2024-11-08 17:56:07,333 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2024-11-08 17:56:07,338 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-08 17:56:07,338 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-08 17:56:07,339 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-11-08 17:56:07,347 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-08 17:56:07,347 INFO L85 PathProgramCache]: Analyzing trace with hash 83035039, now seen corresponding path program 1 times [2024-11-08 17:56:07,358 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-08 17:56:07,359 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1711980737] [2024-11-08 17:56:07,359 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-08 17:56:07,360 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-08 17:56:07,496 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 17:56:07,749 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-08 17:56:07,749 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-08 17:56:07,749 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1711980737] [2024-11-08 17:56:07,750 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1711980737] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-08 17:56:07,750 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-08 17:56:07,751 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-11-08 17:56:07,752 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [117205425] [2024-11-08 17:56:07,753 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-08 17:56:07,762 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-08 17:56:07,767 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-08 17:56:07,796 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-08 17:56:07,796 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-08 17:56:07,807 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 27 [2024-11-08 17:56:07,810 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 27 places, 24 transitions, 60 flow. Second operand has 3 states, 3 states have (on average 15.0) internal successors, (45), 3 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) [2024-11-08 17:56:07,810 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-08 17:56:07,812 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 27 [2024-11-08 17:56:07,813 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-08 17:56:07,941 INFO L124 PetriNetUnfolderBase]: 89/196 cut-off events. [2024-11-08 17:56:07,941 INFO L125 PetriNetUnfolderBase]: For 17/17 co-relation queries the response was YES. [2024-11-08 17:56:07,946 INFO L83 FinitePrefix]: Finished finitePrefix Result has 353 conditions, 196 events. 89/196 cut-off events. For 17/17 co-relation queries the response was YES. Maximal size of possible extension queue 18. Compared 727 event pairs, 22 based on Foata normal form. 1/160 useless extension candidates. Maximal degree in co-relation 304. Up to 74 conditions per place. [2024-11-08 17:56:07,951 INFO L140 encePairwiseOnDemand]: 24/27 looper letters, 21 selfloop transitions, 2 changer transitions 2/34 dead transitions. [2024-11-08 17:56:07,951 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 29 places, 34 transitions, 139 flow [2024-11-08 17:56:07,952 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-08 17:56:07,955 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-11-08 17:56:07,963 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 59 transitions. [2024-11-08 17:56:07,966 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.7283950617283951 [2024-11-08 17:56:07,968 INFO L175 Difference]: Start difference. First operand has 27 places, 24 transitions, 60 flow. Second operand 3 states and 59 transitions. [2024-11-08 17:56:07,969 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 29 places, 34 transitions, 139 flow [2024-11-08 17:56:07,973 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 25 places, 34 transitions, 125 flow, removed 0 selfloop flow, removed 4 redundant places. [2024-11-08 17:56:07,975 INFO L231 Difference]: Finished difference. Result has 26 places, 25 transitions, 64 flow [2024-11-08 17:56:07,978 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=27, PETRI_DIFFERENCE_MINUEND_FLOW=52, PETRI_DIFFERENCE_MINUEND_PLACES=23, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=24, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=22, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=64, PETRI_PLACES=26, PETRI_TRANSITIONS=25} [2024-11-08 17:56:07,981 INFO L277 CegarLoopForPetriNet]: 27 programPoint places, -1 predicate places. [2024-11-08 17:56:07,982 INFO L471 AbstractCegarLoop]: Abstraction has has 26 places, 25 transitions, 64 flow [2024-11-08 17:56:07,982 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 15.0) internal successors, (45), 3 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) [2024-11-08 17:56:07,982 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-08 17:56:07,983 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-08 17:56:07,983 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-11-08 17:56:07,983 INFO L396 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-11-08 17:56:07,984 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-08 17:56:07,984 INFO L85 PathProgramCache]: Analyzing trace with hash 1283301597, now seen corresponding path program 1 times [2024-11-08 17:56:07,984 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-08 17:56:07,985 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1586134145] [2024-11-08 17:56:07,985 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-08 17:56:07,985 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-08 17:56:08,041 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 17:56:08,207 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-08 17:56:08,207 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-08 17:56:08,208 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1586134145] [2024-11-08 17:56:08,208 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1586134145] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-08 17:56:08,208 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-08 17:56:08,208 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-11-08 17:56:08,208 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [865504893] [2024-11-08 17:56:08,209 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-08 17:56:08,210 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-08 17:56:08,210 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-08 17:56:08,211 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-08 17:56:08,211 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2024-11-08 17:56:08,255 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 27 [2024-11-08 17:56:08,255 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 26 places, 25 transitions, 64 flow. Second operand has 4 states, 4 states have (on average 10.0) internal successors, (40), 4 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) [2024-11-08 17:56:08,255 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-08 17:56:08,255 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 27 [2024-11-08 17:56:08,256 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-08 17:56:08,504 INFO L124 PetriNetUnfolderBase]: 312/530 cut-off events. [2024-11-08 17:56:08,504 INFO L125 PetriNetUnfolderBase]: For 15/15 co-relation queries the response was YES. [2024-11-08 17:56:08,508 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1064 conditions, 530 events. 312/530 cut-off events. For 15/15 co-relation queries the response was YES. Maximal size of possible extension queue 31. Compared 2024 event pairs, 159 based on Foata normal form. 0/488 useless extension candidates. Maximal degree in co-relation 559. Up to 353 conditions per place. [2024-11-08 17:56:08,515 INFO L140 encePairwiseOnDemand]: 22/27 looper letters, 27 selfloop transitions, 3 changer transitions 0/35 dead transitions. [2024-11-08 17:56:08,515 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 29 places, 35 transitions, 145 flow [2024-11-08 17:56:08,516 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-11-08 17:56:08,516 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-11-08 17:56:08,517 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 56 transitions. [2024-11-08 17:56:08,517 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5185185185185185 [2024-11-08 17:56:08,517 INFO L175 Difference]: Start difference. First operand has 26 places, 25 transitions, 64 flow. Second operand 4 states and 56 transitions. [2024-11-08 17:56:08,517 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 29 places, 35 transitions, 145 flow [2024-11-08 17:56:08,519 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 28 places, 35 transitions, 143 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-11-08 17:56:08,520 INFO L231 Difference]: Finished difference. Result has 29 places, 26 transitions, 78 flow [2024-11-08 17:56:08,520 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=27, PETRI_DIFFERENCE_MINUEND_FLOW=62, PETRI_DIFFERENCE_MINUEND_PLACES=25, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=25, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=22, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=78, PETRI_PLACES=29, PETRI_TRANSITIONS=26} [2024-11-08 17:56:08,521 INFO L277 CegarLoopForPetriNet]: 27 programPoint places, 2 predicate places. [2024-11-08 17:56:08,522 INFO L471 AbstractCegarLoop]: Abstraction has has 29 places, 26 transitions, 78 flow [2024-11-08 17:56:08,522 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 10.0) internal successors, (40), 4 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) [2024-11-08 17:56:08,522 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-08 17:56:08,523 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-08 17:56:08,523 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-11-08 17:56:08,523 INFO L396 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-11-08 17:56:08,524 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-08 17:56:08,524 INFO L85 PathProgramCache]: Analyzing trace with hash -581218734, now seen corresponding path program 1 times [2024-11-08 17:56:08,525 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-08 17:56:08,525 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1953512712] [2024-11-08 17:56:08,525 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-08 17:56:08,525 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-08 17:56:08,552 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 17:56:09,093 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-08 17:56:09,093 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-08 17:56:09,094 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1953512712] [2024-11-08 17:56:09,094 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1953512712] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-08 17:56:09,094 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2053128321] [2024-11-08 17:56:09,094 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-08 17:56:09,095 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-08 17:56:09,095 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99ffcebf-1f54-45dd-a3df-c0bad0542d47/bin/uautomizer-verify-jihMAELWvX/z3 [2024-11-08 17:56:09,098 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99ffcebf-1f54-45dd-a3df-c0bad0542d47/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-08 17:56:09,101 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99ffcebf-1f54-45dd-a3df-c0bad0542d47/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2024-11-08 17:56:09,206 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 17:56:09,209 INFO L255 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 10 conjuncts are in the unsatisfiable core [2024-11-08 17:56:09,219 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-08 17:56:09,505 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-08 17:56:09,505 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-08 17:56:10,037 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-08 17:56:10,038 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2053128321] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-08 17:56:10,038 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-08 17:56:10,038 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5, 6] total 13 [2024-11-08 17:56:10,039 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [494637524] [2024-11-08 17:56:10,039 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-08 17:56:10,039 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2024-11-08 17:56:10,040 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-08 17:56:10,040 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2024-11-08 17:56:10,043 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=127, Unknown=0, NotChecked=0, Total=182 [2024-11-08 17:56:10,194 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 27 [2024-11-08 17:56:10,195 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 29 places, 26 transitions, 78 flow. Second operand has 14 states, 14 states have (on average 6.785714285714286) internal successors, (95), 14 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-08 17:56:10,195 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-08 17:56:10,195 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 27 [2024-11-08 17:56:10,195 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-08 17:56:10,762 INFO L124 PetriNetUnfolderBase]: 422/697 cut-off events. [2024-11-08 17:56:10,762 INFO L125 PetriNetUnfolderBase]: For 155/155 co-relation queries the response was YES. [2024-11-08 17:56:10,764 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1596 conditions, 697 events. 422/697 cut-off events. For 155/155 co-relation queries the response was YES. Maximal size of possible extension queue 35. Compared 2596 event pairs, 27 based on Foata normal form. 55/688 useless extension candidates. Maximal degree in co-relation 588. Up to 184 conditions per place. [2024-11-08 17:56:10,768 INFO L140 encePairwiseOnDemand]: 16/27 looper letters, 60 selfloop transitions, 26 changer transitions 0/87 dead transitions. [2024-11-08 17:56:10,768 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 39 places, 87 transitions, 417 flow [2024-11-08 17:56:10,769 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-11-08 17:56:10,769 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-11-08 17:56:10,770 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 127 transitions. [2024-11-08 17:56:10,771 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.4276094276094276 [2024-11-08 17:56:10,771 INFO L175 Difference]: Start difference. First operand has 29 places, 26 transitions, 78 flow. Second operand 11 states and 127 transitions. [2024-11-08 17:56:10,771 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 39 places, 87 transitions, 417 flow [2024-11-08 17:56:10,773 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 37 places, 87 transitions, 403 flow, removed 1 selfloop flow, removed 2 redundant places. [2024-11-08 17:56:10,775 INFO L231 Difference]: Finished difference. Result has 45 places, 47 transitions, 254 flow [2024-11-08 17:56:10,775 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=27, PETRI_DIFFERENCE_MINUEND_FLOW=68, PETRI_DIFFERENCE_MINUEND_PLACES=27, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=25, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=8, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=15, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=254, PETRI_PLACES=45, PETRI_TRANSITIONS=47} [2024-11-08 17:56:10,776 INFO L277 CegarLoopForPetriNet]: 27 programPoint places, 18 predicate places. [2024-11-08 17:56:10,776 INFO L471 AbstractCegarLoop]: Abstraction has has 45 places, 47 transitions, 254 flow [2024-11-08 17:56:10,776 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 6.785714285714286) internal successors, (95), 14 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-08 17:56:10,776 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-08 17:56:10,777 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-08 17:56:10,799 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99ffcebf-1f54-45dd-a3df-c0bad0542d47/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2024-11-08 17:56:10,981 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99ffcebf-1f54-45dd-a3df-c0bad0542d47/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-08 17:56:10,981 INFO L396 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-11-08 17:56:10,982 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-08 17:56:10,984 INFO L85 PathProgramCache]: Analyzing trace with hash 1871441864, now seen corresponding path program 2 times [2024-11-08 17:56:10,985 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-08 17:56:10,985 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1791574715] [2024-11-08 17:56:10,985 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-08 17:56:10,985 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-08 17:56:11,010 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 17:56:11,327 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-08 17:56:11,328 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-08 17:56:11,329 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1791574715] [2024-11-08 17:56:11,329 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1791574715] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-08 17:56:11,329 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1194031062] [2024-11-08 17:56:11,329 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-08 17:56:11,330 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-08 17:56:11,330 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99ffcebf-1f54-45dd-a3df-c0bad0542d47/bin/uautomizer-verify-jihMAELWvX/z3 [2024-11-08 17:56:11,332 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99ffcebf-1f54-45dd-a3df-c0bad0542d47/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-08 17:56:11,334 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99ffcebf-1f54-45dd-a3df-c0bad0542d47/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2024-11-08 17:56:11,404 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-08 17:56:11,404 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-08 17:56:11,405 INFO L255 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 9 conjuncts are in the unsatisfiable core [2024-11-08 17:56:11,407 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-08 17:56:11,538 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-08 17:56:11,538 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-08 17:56:11,762 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-08 17:56:11,763 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1194031062] provided 1 perfect and 1 imperfect interpolant sequences [2024-11-08 17:56:11,763 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2024-11-08 17:56:11,763 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [6, 5] total 12 [2024-11-08 17:56:11,763 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [247226191] [2024-11-08 17:56:11,764 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-08 17:56:11,764 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-11-08 17:56:11,765 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-08 17:56:11,765 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-11-08 17:56:11,766 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=99, Unknown=0, NotChecked=0, Total=156 [2024-11-08 17:56:11,780 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 27 [2024-11-08 17:56:11,780 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 45 places, 47 transitions, 254 flow. Second operand has 5 states, 5 states have (on average 12.4) internal successors, (62), 5 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-08 17:56:11,780 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-08 17:56:11,781 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 27 [2024-11-08 17:56:11,781 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-08 17:56:12,001 INFO L124 PetriNetUnfolderBase]: 365/727 cut-off events. [2024-11-08 17:56:12,003 INFO L125 PetriNetUnfolderBase]: For 1164/1230 co-relation queries the response was YES. [2024-11-08 17:56:12,006 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2142 conditions, 727 events. 365/727 cut-off events. For 1164/1230 co-relation queries the response was YES. Maximal size of possible extension queue 39. Compared 3460 event pairs, 66 based on Foata normal form. 11/725 useless extension candidates. Maximal degree in co-relation 1778. Up to 211 conditions per place. [2024-11-08 17:56:12,010 INFO L140 encePairwiseOnDemand]: 23/27 looper letters, 54 selfloop transitions, 13 changer transitions 5/84 dead transitions. [2024-11-08 17:56:12,011 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 48 places, 84 transitions, 558 flow [2024-11-08 17:56:12,011 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-11-08 17:56:12,011 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-11-08 17:56:12,013 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 81 transitions. [2024-11-08 17:56:12,015 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.75 [2024-11-08 17:56:12,015 INFO L175 Difference]: Start difference. First operand has 45 places, 47 transitions, 254 flow. Second operand 4 states and 81 transitions. [2024-11-08 17:56:12,015 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 48 places, 84 transitions, 558 flow [2024-11-08 17:56:12,027 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 46 places, 84 transitions, 541 flow, removed 0 selfloop flow, removed 2 redundant places. [2024-11-08 17:56:12,029 INFO L231 Difference]: Finished difference. Result has 48 places, 57 transitions, 380 flow [2024-11-08 17:56:12,030 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=27, PETRI_DIFFERENCE_MINUEND_FLOW=242, PETRI_DIFFERENCE_MINUEND_PLACES=43, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=47, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=35, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=380, PETRI_PLACES=48, PETRI_TRANSITIONS=57} [2024-11-08 17:56:12,031 INFO L277 CegarLoopForPetriNet]: 27 programPoint places, 21 predicate places. [2024-11-08 17:56:12,032 INFO L471 AbstractCegarLoop]: Abstraction has has 48 places, 57 transitions, 380 flow [2024-11-08 17:56:12,032 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 12.4) internal successors, (62), 5 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-08 17:56:12,033 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-08 17:56:12,033 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-08 17:56:12,054 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99ffcebf-1f54-45dd-a3df-c0bad0542d47/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2024-11-08 17:56:12,233 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99ffcebf-1f54-45dd-a3df-c0bad0542d47/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-08 17:56:12,234 INFO L396 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-11-08 17:56:12,234 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-08 17:56:12,234 INFO L85 PathProgramCache]: Analyzing trace with hash 1251245316, now seen corresponding path program 3 times [2024-11-08 17:56:12,235 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-08 17:56:12,235 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1754197197] [2024-11-08 17:56:12,235 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-08 17:56:12,235 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-08 17:56:12,252 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 17:56:12,520 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 5 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-08 17:56:12,521 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-08 17:56:12,521 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1754197197] [2024-11-08 17:56:12,521 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1754197197] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-08 17:56:12,521 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1629886966] [2024-11-08 17:56:12,521 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-08 17:56:12,522 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-08 17:56:12,522 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99ffcebf-1f54-45dd-a3df-c0bad0542d47/bin/uautomizer-verify-jihMAELWvX/z3 [2024-11-08 17:56:12,524 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99ffcebf-1f54-45dd-a3df-c0bad0542d47/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-08 17:56:12,526 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99ffcebf-1f54-45dd-a3df-c0bad0542d47/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2024-11-08 17:56:12,602 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2024-11-08 17:56:12,602 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-08 17:56:12,605 INFO L255 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 10 conjuncts are in the unsatisfiable core [2024-11-08 17:56:12,607 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-08 17:56:12,848 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 4 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-08 17:56:12,848 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-08 17:56:13,268 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 5 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-08 17:56:13,268 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1629886966] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-08 17:56:13,268 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-08 17:56:13,269 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 8, 7] total 15 [2024-11-08 17:56:13,269 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [913417529] [2024-11-08 17:56:13,269 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-08 17:56:13,270 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2024-11-08 17:56:13,270 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-08 17:56:13,270 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2024-11-08 17:56:13,271 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=149, Unknown=0, NotChecked=0, Total=210 [2024-11-08 17:56:13,295 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 27 [2024-11-08 17:56:13,296 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 48 places, 57 transitions, 380 flow. Second operand has 15 states, 15 states have (on average 7.133333333333334) internal successors, (107), 15 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-08 17:56:13,296 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-08 17:56:13,296 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 27 [2024-11-08 17:56:13,296 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-08 17:56:15,295 INFO L124 PetriNetUnfolderBase]: 2053/3407 cut-off events. [2024-11-08 17:56:15,296 INFO L125 PetriNetUnfolderBase]: For 5750/5756 co-relation queries the response was YES. [2024-11-08 17:56:15,304 INFO L83 FinitePrefix]: Finished finitePrefix Result has 10308 conditions, 3407 events. 2053/3407 cut-off events. For 5750/5756 co-relation queries the response was YES. Maximal size of possible extension queue 150. Compared 18378 event pairs, 88 based on Foata normal form. 54/3457 useless extension candidates. Maximal degree in co-relation 7096. Up to 564 conditions per place. [2024-11-08 17:56:15,319 INFO L140 encePairwiseOnDemand]: 14/27 looper letters, 150 selfloop transitions, 145 changer transitions 55/356 dead transitions. [2024-11-08 17:56:15,319 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 73 places, 356 transitions, 2723 flow [2024-11-08 17:56:15,320 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2024-11-08 17:56:15,320 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2024-11-08 17:56:15,322 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 332 transitions. [2024-11-08 17:56:15,322 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.47293447293447294 [2024-11-08 17:56:15,322 INFO L175 Difference]: Start difference. First operand has 48 places, 57 transitions, 380 flow. Second operand 26 states and 332 transitions. [2024-11-08 17:56:15,322 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 73 places, 356 transitions, 2723 flow [2024-11-08 17:56:15,340 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 73 places, 356 transitions, 2719 flow, removed 2 selfloop flow, removed 0 redundant places. [2024-11-08 17:56:15,346 INFO L231 Difference]: Finished difference. Result has 90 places, 191 transitions, 1900 flow [2024-11-08 17:56:15,346 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=27, PETRI_DIFFERENCE_MINUEND_FLOW=376, PETRI_DIFFERENCE_MINUEND_PLACES=48, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=57, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=26, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=21, PETRI_DIFFERENCE_SUBTRAHEND_STATES=26, PETRI_FLOW=1900, PETRI_PLACES=90, PETRI_TRANSITIONS=191} [2024-11-08 17:56:15,347 INFO L277 CegarLoopForPetriNet]: 27 programPoint places, 63 predicate places. [2024-11-08 17:56:15,347 INFO L471 AbstractCegarLoop]: Abstraction has has 90 places, 191 transitions, 1900 flow [2024-11-08 17:56:15,347 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 7.133333333333334) internal successors, (107), 15 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-08 17:56:15,347 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-08 17:56:15,347 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-08 17:56:15,369 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99ffcebf-1f54-45dd-a3df-c0bad0542d47/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2024-11-08 17:56:15,548 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99ffcebf-1f54-45dd-a3df-c0bad0542d47/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-08 17:56:15,549 INFO L396 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-11-08 17:56:15,549 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-08 17:56:15,549 INFO L85 PathProgramCache]: Analyzing trace with hash 752460816, now seen corresponding path program 4 times [2024-11-08 17:56:15,549 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-08 17:56:15,550 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [481036560] [2024-11-08 17:56:15,550 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-08 17:56:15,550 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-08 17:56:15,571 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 17:56:15,815 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 5 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-08 17:56:15,816 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-08 17:56:15,816 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [481036560] [2024-11-08 17:56:15,817 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [481036560] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-08 17:56:15,817 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2083134880] [2024-11-08 17:56:15,817 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-11-08 17:56:15,818 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-08 17:56:15,818 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99ffcebf-1f54-45dd-a3df-c0bad0542d47/bin/uautomizer-verify-jihMAELWvX/z3 [2024-11-08 17:56:15,820 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99ffcebf-1f54-45dd-a3df-c0bad0542d47/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-08 17:56:15,821 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99ffcebf-1f54-45dd-a3df-c0bad0542d47/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2024-11-08 17:56:15,882 INFO L227 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-11-08 17:56:15,883 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-08 17:56:15,884 INFO L255 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 10 conjuncts are in the unsatisfiable core [2024-11-08 17:56:15,886 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-08 17:56:16,111 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 4 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-08 17:56:16,111 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-08 17:56:16,403 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 5 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-08 17:56:16,404 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2083134880] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-08 17:56:16,404 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-08 17:56:16,404 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 8, 7] total 16 [2024-11-08 17:56:16,404 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1819800283] [2024-11-08 17:56:16,404 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-08 17:56:16,405 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2024-11-08 17:56:16,405 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-08 17:56:16,406 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2024-11-08 17:56:16,406 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=165, Unknown=0, NotChecked=0, Total=240 [2024-11-08 17:56:16,441 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 27 [2024-11-08 17:56:16,442 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 90 places, 191 transitions, 1900 flow. Second operand has 16 states, 16 states have (on average 6.875) internal successors, (110), 16 states have internal predecessors, (110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-08 17:56:16,442 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-08 17:56:16,442 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 27 [2024-11-08 17:56:16,443 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-08 17:56:18,194 INFO L124 PetriNetUnfolderBase]: 2587/4332 cut-off events. [2024-11-08 17:56:18,195 INFO L125 PetriNetUnfolderBase]: For 26386/26418 co-relation queries the response was YES. [2024-11-08 17:56:18,230 INFO L83 FinitePrefix]: Finished finitePrefix Result has 21734 conditions, 4332 events. 2587/4332 cut-off events. For 26386/26418 co-relation queries the response was YES. Maximal size of possible extension queue 197. Compared 25194 event pairs, 130 based on Foata normal form. 42/4370 useless extension candidates. Maximal degree in co-relation 21503. Up to 917 conditions per place. [2024-11-08 17:56:18,262 INFO L140 encePairwiseOnDemand]: 16/27 looper letters, 146 selfloop transitions, 233 changer transitions 25/410 dead transitions. [2024-11-08 17:56:18,262 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 108 places, 410 transitions, 4896 flow [2024-11-08 17:56:18,263 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2024-11-08 17:56:18,263 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2024-11-08 17:56:18,265 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 244 transitions. [2024-11-08 17:56:18,265 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.43033509700176364 [2024-11-08 17:56:18,266 INFO L175 Difference]: Start difference. First operand has 90 places, 191 transitions, 1900 flow. Second operand 21 states and 244 transitions. [2024-11-08 17:56:18,266 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 108 places, 410 transitions, 4896 flow [2024-11-08 17:56:18,437 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 106 places, 410 transitions, 4751 flow, removed 72 selfloop flow, removed 2 redundant places. [2024-11-08 17:56:18,451 INFO L231 Difference]: Finished difference. Result has 121 places, 304 transitions, 4046 flow [2024-11-08 17:56:18,453 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=27, PETRI_DIFFERENCE_MINUEND_FLOW=1807, PETRI_DIFFERENCE_MINUEND_PLACES=86, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=191, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=126, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=35, PETRI_DIFFERENCE_SUBTRAHEND_STATES=21, PETRI_FLOW=4046, PETRI_PLACES=121, PETRI_TRANSITIONS=304} [2024-11-08 17:56:18,453 INFO L277 CegarLoopForPetriNet]: 27 programPoint places, 94 predicate places. [2024-11-08 17:56:18,454 INFO L471 AbstractCegarLoop]: Abstraction has has 121 places, 304 transitions, 4046 flow [2024-11-08 17:56:18,455 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 6.875) internal successors, (110), 16 states have internal predecessors, (110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-08 17:56:18,455 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-08 17:56:18,455 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-08 17:56:18,476 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99ffcebf-1f54-45dd-a3df-c0bad0542d47/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2024-11-08 17:56:18,656 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99ffcebf-1f54-45dd-a3df-c0bad0542d47/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-08 17:56:18,656 INFO L396 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-11-08 17:56:18,657 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-08 17:56:18,657 INFO L85 PathProgramCache]: Analyzing trace with hash 1976768138, now seen corresponding path program 5 times [2024-11-08 17:56:18,657 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-08 17:56:18,657 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [749833110] [2024-11-08 17:56:18,658 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-08 17:56:18,658 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-08 17:56:18,678 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 17:56:19,018 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-08 17:56:19,019 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-08 17:56:19,020 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [749833110] [2024-11-08 17:56:19,020 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [749833110] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-08 17:56:19,022 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1570733706] [2024-11-08 17:56:19,023 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-11-08 17:56:19,023 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-08 17:56:19,023 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99ffcebf-1f54-45dd-a3df-c0bad0542d47/bin/uautomizer-verify-jihMAELWvX/z3 [2024-11-08 17:56:19,025 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99ffcebf-1f54-45dd-a3df-c0bad0542d47/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-08 17:56:19,027 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99ffcebf-1f54-45dd-a3df-c0bad0542d47/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2024-11-08 17:56:19,085 INFO L227 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2024-11-08 17:56:19,085 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-08 17:56:19,086 INFO L255 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 10 conjuncts are in the unsatisfiable core [2024-11-08 17:56:19,087 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-08 17:56:19,222 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-08 17:56:19,223 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-08 17:56:19,442 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-08 17:56:19,443 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1570733706] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-08 17:56:19,443 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-08 17:56:19,443 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7, 8] total 16 [2024-11-08 17:56:19,443 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [865642674] [2024-11-08 17:56:19,443 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-08 17:56:19,444 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2024-11-08 17:56:19,444 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-08 17:56:19,445 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2024-11-08 17:56:19,445 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=190, Unknown=0, NotChecked=0, Total=240 [2024-11-08 17:56:19,502 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 27 [2024-11-08 17:56:19,502 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 121 places, 304 transitions, 4046 flow. Second operand has 16 states, 16 states have (on average 6.3125) internal successors, (101), 16 states have internal predecessors, (101), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-08 17:56:19,502 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-08 17:56:19,503 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 27 [2024-11-08 17:56:19,503 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-08 17:56:22,631 INFO L124 PetriNetUnfolderBase]: 4444/7156 cut-off events. [2024-11-08 17:56:22,632 INFO L125 PetriNetUnfolderBase]: For 78901/78901 co-relation queries the response was YES. [2024-11-08 17:56:22,692 INFO L83 FinitePrefix]: Finished finitePrefix Result has 45250 conditions, 7156 events. 4444/7156 cut-off events. For 78901/78901 co-relation queries the response was YES. Maximal size of possible extension queue 311. Compared 41802 event pairs, 137 based on Foata normal form. 143/7299 useless extension candidates. Maximal degree in co-relation 41312. Up to 1722 conditions per place. [2024-11-08 17:56:22,746 INFO L140 encePairwiseOnDemand]: 15/27 looper letters, 411 selfloop transitions, 419 changer transitions 15/846 dead transitions. [2024-11-08 17:56:22,746 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 145 places, 846 transitions, 12522 flow [2024-11-08 17:56:22,747 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2024-11-08 17:56:22,747 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2024-11-08 17:56:22,748 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 310 transitions. [2024-11-08 17:56:22,748 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.41005291005291006 [2024-11-08 17:56:22,748 INFO L175 Difference]: Start difference. First operand has 121 places, 304 transitions, 4046 flow. Second operand 28 states and 310 transitions. [2024-11-08 17:56:22,749 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 145 places, 846 transitions, 12522 flow [2024-11-08 17:56:23,160 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 142 places, 846 transitions, 12155 flow, removed 176 selfloop flow, removed 3 redundant places. [2024-11-08 17:56:23,177 INFO L231 Difference]: Finished difference. Result has 164 places, 607 transitions, 9792 flow [2024-11-08 17:56:23,178 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=27, PETRI_DIFFERENCE_MINUEND_FLOW=3827, PETRI_DIFFERENCE_MINUEND_PLACES=115, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=301, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=145, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=93, PETRI_DIFFERENCE_SUBTRAHEND_STATES=28, PETRI_FLOW=9792, PETRI_PLACES=164, PETRI_TRANSITIONS=607} [2024-11-08 17:56:23,179 INFO L277 CegarLoopForPetriNet]: 27 programPoint places, 137 predicate places. [2024-11-08 17:56:23,179 INFO L471 AbstractCegarLoop]: Abstraction has has 164 places, 607 transitions, 9792 flow [2024-11-08 17:56:23,179 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 6.3125) internal successors, (101), 16 states have internal predecessors, (101), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-08 17:56:23,180 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-08 17:56:23,180 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-08 17:56:23,204 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99ffcebf-1f54-45dd-a3df-c0bad0542d47/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2024-11-08 17:56:23,384 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99ffcebf-1f54-45dd-a3df-c0bad0542d47/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-08 17:56:23,384 INFO L396 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-11-08 17:56:23,385 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-08 17:56:23,385 INFO L85 PathProgramCache]: Analyzing trace with hash -1241422260, now seen corresponding path program 6 times [2024-11-08 17:56:23,385 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-08 17:56:23,386 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1377796708] [2024-11-08 17:56:23,386 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-08 17:56:23,386 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-08 17:56:23,402 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 17:56:23,725 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-08 17:56:23,726 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-08 17:56:23,726 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1377796708] [2024-11-08 17:56:23,726 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1377796708] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-08 17:56:23,726 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1592913615] [2024-11-08 17:56:23,726 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2024-11-08 17:56:23,727 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-08 17:56:23,727 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99ffcebf-1f54-45dd-a3df-c0bad0542d47/bin/uautomizer-verify-jihMAELWvX/z3 [2024-11-08 17:56:23,732 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99ffcebf-1f54-45dd-a3df-c0bad0542d47/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-08 17:56:23,736 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99ffcebf-1f54-45dd-a3df-c0bad0542d47/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2024-11-08 17:56:23,800 INFO L227 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2024-11-08 17:56:23,801 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-08 17:56:23,802 INFO L255 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 10 conjuncts are in the unsatisfiable core [2024-11-08 17:56:23,804 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-08 17:56:24,005 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-08 17:56:24,006 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-08 17:56:24,322 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-08 17:56:24,323 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1592913615] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-08 17:56:24,323 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-08 17:56:24,323 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7, 8] total 18 [2024-11-08 17:56:24,324 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1019944116] [2024-11-08 17:56:24,324 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-08 17:56:24,324 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2024-11-08 17:56:24,325 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-08 17:56:24,326 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2024-11-08 17:56:24,326 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=245, Unknown=0, NotChecked=0, Total=306 [2024-11-08 17:56:24,393 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 27 [2024-11-08 17:56:24,393 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 164 places, 607 transitions, 9792 flow. Second operand has 18 states, 18 states have (on average 6.111111111111111) internal successors, (110), 18 states have internal predecessors, (110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-08 17:56:24,394 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-08 17:56:24,394 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 27 [2024-11-08 17:56:24,394 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-08 17:56:29,306 INFO L124 PetriNetUnfolderBase]: 6192/10041 cut-off events. [2024-11-08 17:56:29,306 INFO L125 PetriNetUnfolderBase]: For 156937/156937 co-relation queries the response was YES. [2024-11-08 17:56:29,399 INFO L83 FinitePrefix]: Finished finitePrefix Result has 74540 conditions, 10041 events. 6192/10041 cut-off events. For 156937/156937 co-relation queries the response was YES. Maximal size of possible extension queue 485. Compared 63916 event pairs, 166 based on Foata normal form. 95/10136 useless extension candidates. Maximal degree in co-relation 71032. Up to 2140 conditions per place. [2024-11-08 17:56:29,473 INFO L140 encePairwiseOnDemand]: 13/27 looper letters, 529 selfloop transitions, 787 changer transitions 14/1331 dead transitions. [2024-11-08 17:56:29,473 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 203 places, 1331 transitions, 23282 flow [2024-11-08 17:56:29,474 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2024-11-08 17:56:29,474 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 40 states. [2024-11-08 17:56:29,479 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 440 transitions. [2024-11-08 17:56:29,480 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.4074074074074074 [2024-11-08 17:56:29,480 INFO L175 Difference]: Start difference. First operand has 164 places, 607 transitions, 9792 flow. Second operand 40 states and 440 transitions. [2024-11-08 17:56:29,480 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 203 places, 1331 transitions, 23282 flow [2024-11-08 17:56:30,674 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 200 places, 1331 transitions, 22593 flow, removed 341 selfloop flow, removed 3 redundant places. [2024-11-08 17:56:30,702 INFO L231 Difference]: Finished difference. Result has 231 places, 1012 transitions, 18992 flow [2024-11-08 17:56:30,703 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=27, PETRI_DIFFERENCE_MINUEND_FLOW=9479, PETRI_DIFFERENCE_MINUEND_PLACES=161, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=607, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=403, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=136, PETRI_DIFFERENCE_SUBTRAHEND_STATES=40, PETRI_FLOW=18992, PETRI_PLACES=231, PETRI_TRANSITIONS=1012} [2024-11-08 17:56:30,704 INFO L277 CegarLoopForPetriNet]: 27 programPoint places, 204 predicate places. [2024-11-08 17:56:30,704 INFO L471 AbstractCegarLoop]: Abstraction has has 231 places, 1012 transitions, 18992 flow [2024-11-08 17:56:30,705 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 6.111111111111111) internal successors, (110), 18 states have internal predecessors, (110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-08 17:56:30,705 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-08 17:56:30,705 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-08 17:56:30,728 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99ffcebf-1f54-45dd-a3df-c0bad0542d47/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2024-11-08 17:56:30,905 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99ffcebf-1f54-45dd-a3df-c0bad0542d47/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-08 17:56:30,906 INFO L396 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-11-08 17:56:30,906 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-08 17:56:30,907 INFO L85 PathProgramCache]: Analyzing trace with hash -2132480164, now seen corresponding path program 7 times [2024-11-08 17:56:30,907 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-08 17:56:30,907 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1354125980] [2024-11-08 17:56:30,907 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-08 17:56:30,907 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-08 17:56:30,919 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 17:56:31,174 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-08 17:56:31,175 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-08 17:56:31,175 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1354125980] [2024-11-08 17:56:31,175 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1354125980] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-08 17:56:31,175 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1721574930] [2024-11-08 17:56:31,176 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-11-08 17:56:31,176 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-08 17:56:31,176 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99ffcebf-1f54-45dd-a3df-c0bad0542d47/bin/uautomizer-verify-jihMAELWvX/z3 [2024-11-08 17:56:31,178 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99ffcebf-1f54-45dd-a3df-c0bad0542d47/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-08 17:56:31,179 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99ffcebf-1f54-45dd-a3df-c0bad0542d47/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2024-11-08 17:56:31,243 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 17:56:31,244 INFO L255 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 10 conjuncts are in the unsatisfiable core [2024-11-08 17:56:31,246 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-08 17:56:31,455 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-08 17:56:31,455 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-08 17:56:31,807 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-08 17:56:31,808 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1721574930] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-08 17:56:31,808 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-08 17:56:31,808 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 7] total 18 [2024-11-08 17:56:31,808 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1978462763] [2024-11-08 17:56:31,808 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-08 17:56:31,809 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2024-11-08 17:56:31,809 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-08 17:56:31,810 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2024-11-08 17:56:31,810 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=229, Unknown=0, NotChecked=0, Total=306 [2024-11-08 17:56:31,847 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 27 [2024-11-08 17:56:31,848 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 231 places, 1012 transitions, 18992 flow. Second operand has 18 states, 18 states have (on average 6.666666666666667) internal successors, (120), 18 states have internal predecessors, (120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-08 17:56:31,848 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-08 17:56:31,848 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 27 [2024-11-08 17:56:31,848 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-08 17:56:41,834 INFO L124 PetriNetUnfolderBase]: 10611/17575 cut-off events. [2024-11-08 17:56:41,834 INFO L125 PetriNetUnfolderBase]: For 474129/474231 co-relation queries the response was YES. [2024-11-08 17:56:42,097 INFO L83 FinitePrefix]: Finished finitePrefix Result has 155951 conditions, 17575 events. 10611/17575 cut-off events. For 474129/474231 co-relation queries the response was YES. Maximal size of possible extension queue 699. Compared 124119 event pairs, 212 based on Foata normal form. 165/17720 useless extension candidates. Maximal degree in co-relation 155508. Up to 3933 conditions per place. [2024-11-08 17:56:42,432 INFO L140 encePairwiseOnDemand]: 15/27 looper letters, 671 selfloop transitions, 1723 changer transitions 33/2457 dead transitions. [2024-11-08 17:56:42,432 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 279 places, 2457 transitions, 50185 flow [2024-11-08 17:56:42,437 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2024-11-08 17:56:42,437 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 49 states. [2024-11-08 17:56:42,444 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 617 transitions. [2024-11-08 17:56:42,447 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.46636432350718066 [2024-11-08 17:56:42,447 INFO L175 Difference]: Start difference. First operand has 231 places, 1012 transitions, 18992 flow. Second operand 49 states and 617 transitions. [2024-11-08 17:56:42,447 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 279 places, 2457 transitions, 50185 flow [2024-11-08 17:56:48,451 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 275 places, 2457 transitions, 48869 flow, removed 630 selfloop flow, removed 4 redundant places. [2024-11-08 17:56:48,497 INFO L231 Difference]: Finished difference. Result has 307 places, 2016 transitions, 44165 flow [2024-11-08 17:56:48,499 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=27, PETRI_DIFFERENCE_MINUEND_FLOW=18264, PETRI_DIFFERENCE_MINUEND_PLACES=227, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1002, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=775, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=144, PETRI_DIFFERENCE_SUBTRAHEND_STATES=49, PETRI_FLOW=44165, PETRI_PLACES=307, PETRI_TRANSITIONS=2016} [2024-11-08 17:56:48,499 INFO L277 CegarLoopForPetriNet]: 27 programPoint places, 280 predicate places. [2024-11-08 17:56:48,499 INFO L471 AbstractCegarLoop]: Abstraction has has 307 places, 2016 transitions, 44165 flow [2024-11-08 17:56:48,500 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 6.666666666666667) internal successors, (120), 18 states have internal predecessors, (120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-08 17:56:48,500 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-08 17:56:48,500 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-08 17:56:48,514 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99ffcebf-1f54-45dd-a3df-c0bad0542d47/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2024-11-08 17:56:48,700 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99ffcebf-1f54-45dd-a3df-c0bad0542d47/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-08 17:56:48,701 INFO L396 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-11-08 17:56:48,701 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-08 17:56:48,701 INFO L85 PathProgramCache]: Analyzing trace with hash -956893536, now seen corresponding path program 8 times [2024-11-08 17:56:48,701 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-08 17:56:48,701 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [745270878] [2024-11-08 17:56:48,701 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-08 17:56:48,702 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-08 17:56:48,712 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 17:56:48,893 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 5 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-08 17:56:48,893 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-08 17:56:48,894 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [745270878] [2024-11-08 17:56:48,894 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [745270878] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-08 17:56:48,894 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [716026974] [2024-11-08 17:56:48,894 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-08 17:56:48,894 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-08 17:56:48,894 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99ffcebf-1f54-45dd-a3df-c0bad0542d47/bin/uautomizer-verify-jihMAELWvX/z3 [2024-11-08 17:56:48,896 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99ffcebf-1f54-45dd-a3df-c0bad0542d47/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-08 17:56:48,898 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99ffcebf-1f54-45dd-a3df-c0bad0542d47/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2024-11-08 17:56:48,950 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-08 17:56:48,951 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-08 17:56:48,952 INFO L255 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 10 conjuncts are in the unsatisfiable core [2024-11-08 17:56:48,953 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-08 17:56:49,087 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 5 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-08 17:56:49,088 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-08 17:56:49,310 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 6 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-08 17:56:49,312 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [716026974] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-08 17:56:49,312 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-08 17:56:49,313 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 8, 7] total 15 [2024-11-08 17:56:49,313 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [444488976] [2024-11-08 17:56:49,313 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-08 17:56:49,313 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2024-11-08 17:56:49,314 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-08 17:56:49,314 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2024-11-08 17:56:49,314 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=149, Unknown=0, NotChecked=0, Total=210 [2024-11-08 17:56:49,343 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 27 [2024-11-08 17:56:49,344 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 307 places, 2016 transitions, 44165 flow. Second operand has 15 states, 15 states have (on average 6.866666666666666) internal successors, (103), 15 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-08 17:56:49,344 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-08 17:56:49,344 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 27 [2024-11-08 17:56:49,344 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-08 17:57:01,866 INFO L124 PetriNetUnfolderBase]: 10467/17229 cut-off events. [2024-11-08 17:57:01,867 INFO L125 PetriNetUnfolderBase]: For 603004/603134 co-relation queries the response was YES. [2024-11-08 17:57:02,201 INFO L83 FinitePrefix]: Finished finitePrefix Result has 173959 conditions, 17229 events. 10467/17229 cut-off events. For 603004/603134 co-relation queries the response was YES. Maximal size of possible extension queue 683. Compared 120731 event pairs, 314 based on Foata normal form. 48/17245 useless extension candidates. Maximal degree in co-relation 173490. Up to 3783 conditions per place. [2024-11-08 17:57:02,358 INFO L140 encePairwiseOnDemand]: 14/27 looper letters, 738 selfloop transitions, 1441 changer transitions 7/2216 dead transitions. [2024-11-08 17:57:02,358 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 329 places, 2216 transitions, 52673 flow [2024-11-08 17:57:02,359 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2024-11-08 17:57:02,359 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 25 states. [2024-11-08 17:57:02,360 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 294 transitions. [2024-11-08 17:57:02,361 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.43555555555555553 [2024-11-08 17:57:02,361 INFO L175 Difference]: Start difference. First operand has 307 places, 2016 transitions, 44165 flow. Second operand 25 states and 294 transitions. [2024-11-08 17:57:02,361 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 329 places, 2216 transitions, 52673 flow [2024-11-08 17:57:12,959 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 327 places, 2216 transitions, 51306 flow, removed 677 selfloop flow, removed 2 redundant places. [2024-11-08 17:57:13,012 INFO L231 Difference]: Finished difference. Result has 333 places, 2076 transitions, 48936 flow [2024-11-08 17:57:13,013 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=27, PETRI_DIFFERENCE_MINUEND_FLOW=42876, PETRI_DIFFERENCE_MINUEND_PLACES=303, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=2009, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1373, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=605, PETRI_DIFFERENCE_SUBTRAHEND_STATES=25, PETRI_FLOW=48936, PETRI_PLACES=333, PETRI_TRANSITIONS=2076} [2024-11-08 17:57:13,014 INFO L277 CegarLoopForPetriNet]: 27 programPoint places, 306 predicate places. [2024-11-08 17:57:13,014 INFO L471 AbstractCegarLoop]: Abstraction has has 333 places, 2076 transitions, 48936 flow [2024-11-08 17:57:13,015 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 6.866666666666666) internal successors, (103), 15 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-08 17:57:13,015 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-08 17:57:13,015 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-08 17:57:13,029 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99ffcebf-1f54-45dd-a3df-c0bad0542d47/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Ended with exit code 0 [2024-11-08 17:57:13,215 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99ffcebf-1f54-45dd-a3df-c0bad0542d47/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2024-11-08 17:57:13,216 INFO L396 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-11-08 17:57:13,216 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-08 17:57:13,216 INFO L85 PathProgramCache]: Analyzing trace with hash 524035972, now seen corresponding path program 9 times [2024-11-08 17:57:13,217 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-08 17:57:13,217 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [230438246] [2024-11-08 17:57:13,217 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-08 17:57:13,217 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-08 17:57:13,228 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 17:57:13,462 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-08 17:57:13,462 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-08 17:57:13,463 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [230438246] [2024-11-08 17:57:13,463 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [230438246] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-08 17:57:13,463 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1935626731] [2024-11-08 17:57:13,463 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-08 17:57:13,463 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-08 17:57:13,463 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99ffcebf-1f54-45dd-a3df-c0bad0542d47/bin/uautomizer-verify-jihMAELWvX/z3 [2024-11-08 17:57:13,465 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99ffcebf-1f54-45dd-a3df-c0bad0542d47/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-08 17:57:13,467 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99ffcebf-1f54-45dd-a3df-c0bad0542d47/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2024-11-08 17:57:13,523 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2024-11-08 17:57:13,524 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-08 17:57:13,525 INFO L255 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 10 conjuncts are in the unsatisfiable core [2024-11-08 17:57:13,526 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-08 17:57:13,720 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-08 17:57:13,721 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-08 17:57:14,000 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 4 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-08 17:57:14,000 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1935626731] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-08 17:57:14,001 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-08 17:57:14,001 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 7] total 17 [2024-11-08 17:57:14,001 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1609374326] [2024-11-08 17:57:14,001 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-08 17:57:14,002 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2024-11-08 17:57:14,003 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-08 17:57:14,003 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2024-11-08 17:57:14,004 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=194, Unknown=0, NotChecked=0, Total=272 [2024-11-08 17:57:14,047 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 27 [2024-11-08 17:57:14,048 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 333 places, 2076 transitions, 48936 flow. Second operand has 17 states, 17 states have (on average 6.647058823529412) internal successors, (113), 17 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-08 17:57:14,049 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-08 17:57:14,049 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 27 [2024-11-08 17:57:14,049 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-08 17:57:31,569 INFO L124 PetriNetUnfolderBase]: 12156/20108 cut-off events. [2024-11-08 17:57:31,569 INFO L125 PetriNetUnfolderBase]: For 902846/902932 co-relation queries the response was YES. [2024-11-08 17:57:31,976 INFO L83 FinitePrefix]: Finished finitePrefix Result has 215553 conditions, 20108 events. 12156/20108 cut-off events. For 902846/902932 co-relation queries the response was YES. Maximal size of possible extension queue 840. Compared 146182 event pairs, 394 based on Foata normal form. 97/20191 useless extension candidates. Maximal degree in co-relation 215075. Up to 5479 conditions per place. [2024-11-08 17:57:32,105 INFO L140 encePairwiseOnDemand]: 15/27 looper letters, 718 selfloop transitions, 1903 changer transitions 13/2664 dead transitions. [2024-11-08 17:57:32,105 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 355 places, 2664 transitions, 67696 flow [2024-11-08 17:57:32,106 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2024-11-08 17:57:32,106 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 25 states. [2024-11-08 17:57:32,107 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 309 transitions. [2024-11-08 17:57:32,107 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.4577777777777778 [2024-11-08 17:57:32,107 INFO L175 Difference]: Start difference. First operand has 333 places, 2076 transitions, 48936 flow. Second operand 25 states and 309 transitions. [2024-11-08 17:57:32,107 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 355 places, 2664 transitions, 67696 flow [2024-11-08 17:57:48,801 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 348 places, 2664 transitions, 67330 flow, removed 128 selfloop flow, removed 7 redundant places. [2024-11-08 17:57:48,869 INFO L231 Difference]: Finished difference. Result has 361 places, 2452 transitions, 66003 flow [2024-11-08 17:57:48,871 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=27, PETRI_DIFFERENCE_MINUEND_FLOW=48648, PETRI_DIFFERENCE_MINUEND_PLACES=324, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=2076, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1554, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=393, PETRI_DIFFERENCE_SUBTRAHEND_STATES=25, PETRI_FLOW=66003, PETRI_PLACES=361, PETRI_TRANSITIONS=2452} [2024-11-08 17:57:48,871 INFO L277 CegarLoopForPetriNet]: 27 programPoint places, 334 predicate places. [2024-11-08 17:57:48,871 INFO L471 AbstractCegarLoop]: Abstraction has has 361 places, 2452 transitions, 66003 flow [2024-11-08 17:57:48,872 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 6.647058823529412) internal successors, (113), 17 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-08 17:57:48,872 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-08 17:57:48,872 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-08 17:57:48,893 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99ffcebf-1f54-45dd-a3df-c0bad0542d47/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Ended with exit code 0 [2024-11-08 17:57:49,076 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99ffcebf-1f54-45dd-a3df-c0bad0542d47/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-08 17:57:49,076 INFO L396 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-11-08 17:57:49,076 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-08 17:57:49,077 INFO L85 PathProgramCache]: Analyzing trace with hash 902191170, now seen corresponding path program 10 times [2024-11-08 17:57:49,077 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-08 17:57:49,077 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [603283491] [2024-11-08 17:57:49,077 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-08 17:57:49,077 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-08 17:57:49,087 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 17:57:49,246 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-08 17:57:49,246 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-08 17:57:49,246 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [603283491] [2024-11-08 17:57:49,246 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [603283491] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-08 17:57:49,247 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1734209031] [2024-11-08 17:57:49,247 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-11-08 17:57:49,247 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-08 17:57:49,247 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99ffcebf-1f54-45dd-a3df-c0bad0542d47/bin/uautomizer-verify-jihMAELWvX/z3 [2024-11-08 17:57:49,250 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99ffcebf-1f54-45dd-a3df-c0bad0542d47/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-08 17:57:49,252 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99ffcebf-1f54-45dd-a3df-c0bad0542d47/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2024-11-08 17:57:49,317 INFO L227 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-11-08 17:57:49,317 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-08 17:57:49,318 INFO L255 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 10 conjuncts are in the unsatisfiable core [2024-11-08 17:57:49,319 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-08 17:57:49,426 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-08 17:57:49,426 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-08 17:57:49,632 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-08 17:57:49,632 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1734209031] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-08 17:57:49,633 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-08 17:57:49,633 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7, 8] total 15 [2024-11-08 17:57:49,633 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [853766024] [2024-11-08 17:57:49,633 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-08 17:57:49,633 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2024-11-08 17:57:49,633 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-08 17:57:49,634 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2024-11-08 17:57:49,634 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=165, Unknown=0, NotChecked=0, Total=210 [2024-11-08 17:57:49,666 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 27 [2024-11-08 17:57:49,666 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 361 places, 2452 transitions, 66003 flow. Second operand has 15 states, 15 states have (on average 6.4) internal successors, (96), 15 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-08 17:57:49,666 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-08 17:57:49,666 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 27 [2024-11-08 17:57:49,667 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-08 17:58:15,545 INFO L124 PetriNetUnfolderBase]: 17783/28978 cut-off events. [2024-11-08 17:58:15,545 INFO L125 PetriNetUnfolderBase]: For 1578367/1578367 co-relation queries the response was YES. [2024-11-08 17:58:16,146 INFO L83 FinitePrefix]: Finished finitePrefix Result has 332513 conditions, 28978 events. 17783/28978 cut-off events. For 1578367/1578367 co-relation queries the response was YES. Maximal size of possible extension queue 1184. Compared 215913 event pairs, 388 based on Foata normal form. 277/29255 useless extension candidates. Maximal degree in co-relation 331844. Up to 6014 conditions per place. [2024-11-08 17:58:16,283 INFO L140 encePairwiseOnDemand]: 14/27 looper letters, 1060 selfloop transitions, 3050 changer transitions 65/4176 dead transitions. [2024-11-08 17:58:16,284 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 400 places, 4176 transitions, 120275 flow [2024-11-08 17:58:16,284 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2024-11-08 17:58:16,284 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 40 states. [2024-11-08 17:58:16,285 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 422 transitions. [2024-11-08 17:58:16,286 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.3907407407407407 [2024-11-08 17:58:16,286 INFO L175 Difference]: Start difference. First operand has 361 places, 2452 transitions, 66003 flow. Second operand 40 states and 422 transitions. [2024-11-08 17:58:16,286 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 400 places, 4176 transitions, 120275 flow [2024-11-08 17:58:54,631 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 388 places, 4176 transitions, 118477 flow, removed 311 selfloop flow, removed 12 redundant places. [2024-11-08 17:58:54,743 INFO L231 Difference]: Finished difference. Result has 416 places, 3670 transitions, 111518 flow [2024-11-08 17:58:54,745 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=27, PETRI_DIFFERENCE_MINUEND_FLOW=64528, PETRI_DIFFERENCE_MINUEND_PLACES=349, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=2437, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1864, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=381, PETRI_DIFFERENCE_SUBTRAHEND_STATES=40, PETRI_FLOW=111518, PETRI_PLACES=416, PETRI_TRANSITIONS=3670} [2024-11-08 17:58:54,745 INFO L277 CegarLoopForPetriNet]: 27 programPoint places, 389 predicate places. [2024-11-08 17:58:54,745 INFO L471 AbstractCegarLoop]: Abstraction has has 416 places, 3670 transitions, 111518 flow [2024-11-08 17:58:54,746 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 6.4) internal successors, (96), 15 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-08 17:58:54,746 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-08 17:58:54,746 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-08 17:58:54,766 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99ffcebf-1f54-45dd-a3df-c0bad0542d47/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2024-11-08 17:58:54,950 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99ffcebf-1f54-45dd-a3df-c0bad0542d47/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2024-11-08 17:58:54,950 INFO L396 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-11-08 17:58:54,950 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-08 17:58:54,950 INFO L85 PathProgramCache]: Analyzing trace with hash 1594626004, now seen corresponding path program 11 times [2024-11-08 17:58:54,951 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-08 17:58:54,951 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1111740248] [2024-11-08 17:58:54,951 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-08 17:58:54,951 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-08 17:58:54,963 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 17:58:55,170 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 5 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-08 17:58:55,170 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-08 17:58:55,170 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1111740248] [2024-11-08 17:58:55,171 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1111740248] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-08 17:58:55,171 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2073884975] [2024-11-08 17:58:55,171 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-11-08 17:58:55,171 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-08 17:58:55,171 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99ffcebf-1f54-45dd-a3df-c0bad0542d47/bin/uautomizer-verify-jihMAELWvX/z3 [2024-11-08 17:58:55,173 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99ffcebf-1f54-45dd-a3df-c0bad0542d47/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-08 17:58:55,174 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99ffcebf-1f54-45dd-a3df-c0bad0542d47/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2024-11-08 17:58:55,222 INFO L227 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-08 17:58:55,222 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-08 17:58:55,224 WARN L253 TraceCheckSpWp]: Trace formula consists of 18 conjuncts, 9 conjuncts are in the unsatisfiable core [2024-11-08 17:58:55,225 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-08 17:58:55,409 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 6 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-08 17:58:55,409 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-08 17:58:55,671 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 6 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-08 17:58:55,671 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2073884975] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-08 17:58:55,671 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-08 17:58:55,671 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 8] total 18 [2024-11-08 17:58:55,672 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1993389614] [2024-11-08 17:58:55,672 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-08 17:58:55,672 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2024-11-08 17:58:55,673 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-08 17:58:55,673 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2024-11-08 17:58:55,673 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=223, Unknown=0, NotChecked=0, Total=306 [2024-11-08 17:58:55,702 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 27 [2024-11-08 17:58:55,702 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 416 places, 3670 transitions, 111518 flow. Second operand has 18 states, 18 states have (on average 6.5) internal successors, (117), 18 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) [2024-11-08 17:58:55,702 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-08 17:58:55,702 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 27 [2024-11-08 17:58:55,703 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand