./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/pthread/triangular-longest-1.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version e7bb482b 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_0dcf83f7-8b7f-4f8b-857f-2b32dfddd8be/bin/uautomizer-verify-WvqO1wxjHP/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0dcf83f7-8b7f-4f8b-857f-2b32dfddd8be/bin/uautomizer-verify-WvqO1wxjHP/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0dcf83f7-8b7f-4f8b-857f-2b32dfddd8be/bin/uautomizer-verify-WvqO1wxjHP/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0dcf83f7-8b7f-4f8b-857f-2b32dfddd8be/bin/uautomizer-verify-WvqO1wxjHP/config/AutomizerReach.xml -i ../../sv-benchmarks/c/pthread/triangular-longest-1.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0dcf83f7-8b7f-4f8b-857f-2b32dfddd8be/bin/uautomizer-verify-WvqO1wxjHP/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0dcf83f7-8b7f-4f8b-857f-2b32dfddd8be/bin/uautomizer-verify-WvqO1wxjHP --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 81809963fcaff21fd6241cde97e522447f695a8b323a0a16c5a31b7f82b0f683 --- Real Ultimate output --- This is Ultimate 0.2.3-dev-e7bb482 [2023-11-06 23:03:22,330 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-11-06 23:03:22,441 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0dcf83f7-8b7f-4f8b-857f-2b32dfddd8be/bin/uautomizer-verify-WvqO1wxjHP/config/svcomp-Reach-32bit-Automizer_Default.epf [2023-11-06 23:03:22,451 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-11-06 23:03:22,452 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-11-06 23:03:22,510 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-11-06 23:03:22,511 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-11-06 23:03:22,512 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-11-06 23:03:22,513 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-11-06 23:03:22,519 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-11-06 23:03:22,520 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-11-06 23:03:22,520 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-11-06 23:03:22,521 INFO L153 SettingsManager]: * Use SBE=true [2023-11-06 23:03:22,521 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-11-06 23:03:22,522 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-11-06 23:03:22,522 INFO L153 SettingsManager]: * sizeof long=4 [2023-11-06 23:03:22,523 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-11-06 23:03:22,523 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-11-06 23:03:22,524 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-11-06 23:03:22,524 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-11-06 23:03:22,525 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-11-06 23:03:22,526 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-11-06 23:03:22,526 INFO L153 SettingsManager]: * sizeof long double=12 [2023-11-06 23:03:22,526 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-11-06 23:03:22,527 INFO L153 SettingsManager]: * Use constant arrays=true [2023-11-06 23:03:22,527 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-11-06 23:03:22,528 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-11-06 23:03:22,528 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-11-06 23:03:22,529 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-06 23:03:22,529 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-11-06 23:03:22,530 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-11-06 23:03:22,530 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-11-06 23:03:22,530 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-11-06 23:03:22,531 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-11-06 23:03:22,531 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-11-06 23:03:22,531 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-11-06 23:03:22,539 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-11-06 23:03:22,539 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-11-06 23:03:22,539 INFO L153 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-11-06 23:03:22,539 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_0dcf83f7-8b7f-4f8b-857f-2b32dfddd8be/bin/uautomizer-verify-WvqO1wxjHP/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0dcf83f7-8b7f-4f8b-857f-2b32dfddd8be/bin/uautomizer-verify-WvqO1wxjHP Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 81809963fcaff21fd6241cde97e522447f695a8b323a0a16c5a31b7f82b0f683 [2023-11-06 23:03:22,829 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-11-06 23:03:22,858 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-11-06 23:03:22,861 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-11-06 23:03:22,862 INFO L270 PluginConnector]: Initializing CDTParser... [2023-11-06 23:03:22,863 INFO L274 PluginConnector]: CDTParser initialized [2023-11-06 23:03:22,864 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0dcf83f7-8b7f-4f8b-857f-2b32dfddd8be/bin/uautomizer-verify-WvqO1wxjHP/../../sv-benchmarks/c/pthread/triangular-longest-1.i [2023-11-06 23:03:25,905 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-11-06 23:03:26,219 INFO L384 CDTParser]: Found 1 translation units. [2023-11-06 23:03:26,219 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0dcf83f7-8b7f-4f8b-857f-2b32dfddd8be/sv-benchmarks/c/pthread/triangular-longest-1.i [2023-11-06 23:03:26,234 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0dcf83f7-8b7f-4f8b-857f-2b32dfddd8be/bin/uautomizer-verify-WvqO1wxjHP/data/4f6a757af/30314f01da9948a881dbb82d394fd963/FLAG08585e5ec [2023-11-06 23:03:26,249 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0dcf83f7-8b7f-4f8b-857f-2b32dfddd8be/bin/uautomizer-verify-WvqO1wxjHP/data/4f6a757af/30314f01da9948a881dbb82d394fd963 [2023-11-06 23:03:26,252 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-11-06 23:03:26,254 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2023-11-06 23:03:26,255 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-11-06 23:03:26,256 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-11-06 23:03:26,261 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-11-06 23:03:26,262 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.11 11:03:26" (1/1) ... [2023-11-06 23:03:26,263 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1260d214 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 11:03:26, skipping insertion in model container [2023-11-06 23:03:26,263 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.11 11:03:26" (1/1) ... [2023-11-06 23:03:26,327 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-11-06 23:03:26,719 WARN L240 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_0dcf83f7-8b7f-4f8b-857f-2b32dfddd8be/sv-benchmarks/c/pthread/triangular-longest-1.i[30962,30975] [2023-11-06 23:03:26,724 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-06 23:03:26,735 INFO L202 MainTranslator]: Completed pre-run [2023-11-06 23:03:26,811 WARN L240 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_0dcf83f7-8b7f-4f8b-857f-2b32dfddd8be/sv-benchmarks/c/pthread/triangular-longest-1.i[30962,30975] [2023-11-06 23:03:26,819 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-06 23:03:26,859 WARN L672 CHandler]: The function __VERIFIER_atomic_begin is called, but not defined or handled by StandardFunctionHandler. [2023-11-06 23:03:26,860 WARN L672 CHandler]: The function __VERIFIER_atomic_end is called, but not defined or handled by StandardFunctionHandler. [2023-11-06 23:03:26,868 INFO L206 MainTranslator]: Completed translation [2023-11-06 23:03:26,869 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 11:03:26 WrapperNode [2023-11-06 23:03:26,869 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-11-06 23:03:26,870 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-11-06 23:03:26,870 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-11-06 23:03:26,870 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-11-06 23:03:26,878 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 11:03:26" (1/1) ... [2023-11-06 23:03:26,912 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 11:03:26" (1/1) ... [2023-11-06 23:03:26,951 INFO L138 Inliner]: procedures = 169, calls = 24, calls flagged for inlining = 2, calls inlined = 2, statements flattened = 46 [2023-11-06 23:03:26,952 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-11-06 23:03:26,952 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-11-06 23:03:26,953 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-11-06 23:03:26,953 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-11-06 23:03:26,962 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 11:03:26" (1/1) ... [2023-11-06 23:03:26,978 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 11:03:26" (1/1) ... [2023-11-06 23:03:26,985 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 11:03:26" (1/1) ... [2023-11-06 23:03:26,985 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 11:03:26" (1/1) ... [2023-11-06 23:03:27,004 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 11:03:26" (1/1) ... [2023-11-06 23:03:27,008 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 11:03:26" (1/1) ... [2023-11-06 23:03:27,009 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 11:03:26" (1/1) ... [2023-11-06 23:03:27,038 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 11:03:26" (1/1) ... [2023-11-06 23:03:27,058 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-11-06 23:03:27,058 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-11-06 23:03:27,059 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-11-06 23:03:27,059 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-11-06 23:03:27,060 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 11:03:26" (1/1) ... [2023-11-06 23:03:27,073 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-06 23:03:27,094 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0dcf83f7-8b7f-4f8b-857f-2b32dfddd8be/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 23:03:27,116 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0dcf83f7-8b7f-4f8b-857f-2b32dfddd8be/bin/uautomizer-verify-WvqO1wxjHP/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-11-06 23:03:27,149 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0dcf83f7-8b7f-4f8b-857f-2b32dfddd8be/bin/uautomizer-verify-WvqO1wxjHP/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-11-06 23:03:27,162 INFO L130 BoogieDeclarations]: Found specification of procedure t1 [2023-11-06 23:03:27,162 INFO L138 BoogieDeclarations]: Found implementation of procedure t1 [2023-11-06 23:03:27,163 INFO L130 BoogieDeclarations]: Found specification of procedure t2 [2023-11-06 23:03:27,163 INFO L138 BoogieDeclarations]: Found implementation of procedure t2 [2023-11-06 23:03:27,163 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-11-06 23:03:27,163 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2023-11-06 23:03:27,163 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-11-06 23:03:27,163 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-11-06 23:03:27,164 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-11-06 23:03:27,164 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-11-06 23:03:27,165 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2023-11-06 23:03:27,165 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-11-06 23:03:27,166 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-11-06 23:03:27,167 WARN L210 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement [2023-11-06 23:03:27,350 INFO L236 CfgBuilder]: Building ICFG [2023-11-06 23:03:27,351 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-11-06 23:03:27,477 INFO L277 CfgBuilder]: Performing block encoding [2023-11-06 23:03:27,484 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-11-06 23:03:27,485 INFO L302 CfgBuilder]: Removed 2 assume(true) statements. [2023-11-06 23:03:27,492 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.11 11:03:27 BoogieIcfgContainer [2023-11-06 23:03:27,492 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-11-06 23:03:27,495 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-11-06 23:03:27,496 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-11-06 23:03:27,500 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-11-06 23:03:27,500 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 06.11 11:03:26" (1/3) ... [2023-11-06 23:03:27,501 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2e9194f3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.11 11:03:27, skipping insertion in model container [2023-11-06 23:03:27,501 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 11:03:26" (2/3) ... [2023-11-06 23:03:27,503 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2e9194f3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.11 11:03:27, skipping insertion in model container [2023-11-06 23:03:27,504 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.11 11:03:27" (3/3) ... [2023-11-06 23:03:27,506 INFO L112 eAbstractionObserver]: Analyzing ICFG triangular-longest-1.i [2023-11-06 23:03:27,515 WARN L145 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2023-11-06 23:03:27,526 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-11-06 23:03:27,527 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-11-06 23:03:27,527 INFO L519 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-11-06 23:03:27,590 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2023-11-06 23:03:27,633 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 71 places, 69 transitions, 146 flow [2023-11-06 23:03:27,672 INFO L124 PetriNetUnfolderBase]: 5/67 cut-off events. [2023-11-06 23:03:27,672 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-11-06 23:03:27,678 INFO L83 FinitePrefix]: Finished finitePrefix Result has 74 conditions, 67 events. 5/67 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 73 event pairs, 0 based on Foata normal form. 0/61 useless extension candidates. Maximal degree in co-relation 50. Up to 2 conditions per place. [2023-11-06 23:03:27,678 INFO L82 GeneralOperation]: Start removeDead. Operand has 71 places, 69 transitions, 146 flow [2023-11-06 23:03:27,683 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 69 places, 67 transitions, 140 flow [2023-11-06 23:03:27,687 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-11-06 23:03:27,697 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 69 places, 67 transitions, 140 flow [2023-11-06 23:03:27,700 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 69 places, 67 transitions, 140 flow [2023-11-06 23:03:27,701 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 69 places, 67 transitions, 140 flow [2023-11-06 23:03:27,725 INFO L124 PetriNetUnfolderBase]: 5/67 cut-off events. [2023-11-06 23:03:27,725 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-11-06 23:03:27,726 INFO L83 FinitePrefix]: Finished finitePrefix Result has 74 conditions, 67 events. 5/67 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 73 event pairs, 0 based on Foata normal form. 0/61 useless extension candidates. Maximal degree in co-relation 50. Up to 2 conditions per place. [2023-11-06 23:03:27,728 INFO L119 LiptonReduction]: Number of co-enabled transitions 1296 [2023-11-06 23:03:30,343 INFO L134 LiptonReduction]: Checked pairs total: 1192 [2023-11-06 23:03:30,345 INFO L136 LiptonReduction]: Total number of compositions: 62 [2023-11-06 23:03:30,371 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-06 23:03:30,379 INFO L357 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mPorIndependenceSettings=[Lde.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings;@42ca74d8, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-11-06 23:03:30,379 INFO L358 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2023-11-06 23:03:30,392 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-11-06 23:03:30,393 INFO L124 PetriNetUnfolderBase]: 3/13 cut-off events. [2023-11-06 23:03:30,393 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-11-06 23:03:30,393 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 23:03:30,394 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1] [2023-11-06 23:03:30,395 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-06 23:03:30,401 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 23:03:30,401 INFO L85 PathProgramCache]: Analyzing trace with hash -425197577, now seen corresponding path program 1 times [2023-11-06 23:03:30,416 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 23:03:30,417 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1066870247] [2023-11-06 23:03:30,417 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 23:03:30,418 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 23:03:30,589 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 23:03:30,981 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 23:03:30,982 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 23:03:30,982 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1066870247] [2023-11-06 23:03:30,983 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1066870247] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-06 23:03:30,983 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-06 23:03:30,984 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-06 23:03:30,986 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [913459770] [2023-11-06 23:03:30,986 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 23:03:30,995 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-06 23:03:31,001 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 23:03:31,027 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-06 23:03:31,028 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-06 23:03:31,075 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 56 out of 131 [2023-11-06 23:03:31,078 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 18 places, 14 transitions, 34 flow. Second operand has 4 states, 4 states have (on average 57.5) internal successors, (230), 4 states have internal predecessors, (230), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 23:03:31,078 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 23:03:31,078 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 56 of 131 [2023-11-06 23:03:31,080 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 23:03:31,178 INFO L124 PetriNetUnfolderBase]: 94/152 cut-off events. [2023-11-06 23:03:31,179 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2023-11-06 23:03:31,180 INFO L83 FinitePrefix]: Finished finitePrefix Result has 316 conditions, 152 events. 94/152 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 14. Compared 384 event pairs, 23 based on Foata normal form. 0/106 useless extension candidates. Maximal degree in co-relation 306. Up to 76 conditions per place. [2023-11-06 23:03:31,182 INFO L140 encePairwiseOnDemand]: 125/131 looper letters, 18 selfloop transitions, 4 changer transitions 4/26 dead transitions. [2023-11-06 23:03:31,182 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 21 places, 26 transitions, 110 flow [2023-11-06 23:03:31,183 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-06 23:03:31,186 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-11-06 23:03:31,195 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 253 transitions. [2023-11-06 23:03:31,198 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.48282442748091603 [2023-11-06 23:03:31,198 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 253 transitions. [2023-11-06 23:03:31,199 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 253 transitions. [2023-11-06 23:03:31,200 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 23:03:31,203 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 253 transitions. [2023-11-06 23:03:31,206 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 63.25) internal successors, (253), 4 states have internal predecessors, (253), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 23:03:31,211 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 131.0) internal successors, (655), 5 states have internal predecessors, (655), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 23:03:31,212 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 131.0) internal successors, (655), 5 states have internal predecessors, (655), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 23:03:31,214 INFO L175 Difference]: Start difference. First operand has 18 places, 14 transitions, 34 flow. Second operand 4 states and 253 transitions. [2023-11-06 23:03:31,215 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 21 places, 26 transitions, 110 flow [2023-11-06 23:03:31,217 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 19 places, 26 transitions, 108 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-11-06 23:03:31,219 INFO L231 Difference]: Finished difference. Result has 21 places, 15 transitions, 53 flow [2023-11-06 23:03:31,221 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=131, PETRI_DIFFERENCE_MINUEND_FLOW=30, PETRI_DIFFERENCE_MINUEND_PLACES=16, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=13, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=10, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=53, PETRI_PLACES=21, PETRI_TRANSITIONS=15} [2023-11-06 23:03:31,224 INFO L281 CegarLoopForPetriNet]: 18 programPoint places, 3 predicate places. [2023-11-06 23:03:31,224 INFO L495 AbstractCegarLoop]: Abstraction has has 21 places, 15 transitions, 53 flow [2023-11-06 23:03:31,225 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 57.5) internal successors, (230), 4 states have internal predecessors, (230), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 23:03:31,225 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 23:03:31,225 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 23:03:31,225 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-11-06 23:03:31,226 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-06 23:03:31,226 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 23:03:31,226 INFO L85 PathProgramCache]: Analyzing trace with hash -593367787, now seen corresponding path program 1 times [2023-11-06 23:03:31,227 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 23:03:31,227 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1466560477] [2023-11-06 23:03:31,227 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 23:03:31,227 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 23:03:31,246 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 23:03:31,362 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 23:03:31,362 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 23:03:31,363 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1466560477] [2023-11-06 23:03:31,363 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1466560477] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-06 23:03:31,363 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-06 23:03:31,363 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-06 23:03:31,364 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2119578165] [2023-11-06 23:03:31,364 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 23:03:31,365 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-06 23:03:31,365 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 23:03:31,366 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-06 23:03:31,366 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-11-06 23:03:31,402 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 55 out of 131 [2023-11-06 23:03:31,403 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 21 places, 15 transitions, 53 flow. Second operand has 5 states, 5 states have (on average 56.6) internal successors, (283), 5 states have internal predecessors, (283), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 23:03:31,403 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 23:03:31,403 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 55 of 131 [2023-11-06 23:03:31,403 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 23:03:31,555 INFO L124 PetriNetUnfolderBase]: 126/217 cut-off events. [2023-11-06 23:03:31,556 INFO L125 PetriNetUnfolderBase]: For 73/73 co-relation queries the response was YES. [2023-11-06 23:03:31,560 INFO L83 FinitePrefix]: Finished finitePrefix Result has 547 conditions, 217 events. 126/217 cut-off events. For 73/73 co-relation queries the response was YES. Maximal size of possible extension queue 19. Compared 658 event pairs, 19 based on Foata normal form. 10/191 useless extension candidates. Maximal degree in co-relation 535. Up to 89 conditions per place. [2023-11-06 23:03:31,563 INFO L140 encePairwiseOnDemand]: 126/131 looper letters, 33 selfloop transitions, 9 changer transitions 0/42 dead transitions. [2023-11-06 23:03:31,563 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 25 places, 42 transitions, 215 flow [2023-11-06 23:03:31,565 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-11-06 23:03:31,565 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-11-06 23:03:31,570 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 368 transitions. [2023-11-06 23:03:31,571 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4681933842239186 [2023-11-06 23:03:31,571 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 368 transitions. [2023-11-06 23:03:31,572 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 368 transitions. [2023-11-06 23:03:31,573 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 23:03:31,573 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 368 transitions. [2023-11-06 23:03:31,576 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 61.333333333333336) internal successors, (368), 6 states have internal predecessors, (368), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 23:03:31,581 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 131.0) internal successors, (917), 7 states have internal predecessors, (917), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 23:03:31,584 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 131.0) internal successors, (917), 7 states have internal predecessors, (917), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 23:03:31,584 INFO L175 Difference]: Start difference. First operand has 21 places, 15 transitions, 53 flow. Second operand 6 states and 368 transitions. [2023-11-06 23:03:31,585 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 25 places, 42 transitions, 215 flow [2023-11-06 23:03:31,587 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 25 places, 42 transitions, 215 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-11-06 23:03:31,589 INFO L231 Difference]: Finished difference. Result has 29 places, 24 transitions, 134 flow [2023-11-06 23:03:31,589 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=131, PETRI_DIFFERENCE_MINUEND_FLOW=53, PETRI_DIFFERENCE_MINUEND_PLACES=20, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=15, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=9, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=134, PETRI_PLACES=29, PETRI_TRANSITIONS=24} [2023-11-06 23:03:31,591 INFO L281 CegarLoopForPetriNet]: 18 programPoint places, 11 predicate places. [2023-11-06 23:03:31,591 INFO L495 AbstractCegarLoop]: Abstraction has has 29 places, 24 transitions, 134 flow [2023-11-06 23:03:31,591 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 56.6) internal successors, (283), 5 states have internal predecessors, (283), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 23:03:31,597 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 23:03:31,598 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 23:03:31,598 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-11-06 23:03:31,598 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-06 23:03:31,599 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 23:03:31,599 INFO L85 PathProgramCache]: Analyzing trace with hash -593353837, now seen corresponding path program 2 times [2023-11-06 23:03:31,599 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 23:03:31,600 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [430173867] [2023-11-06 23:03:31,600 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 23:03:31,601 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 23:03:31,626 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 23:03:31,767 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 23:03:31,768 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 23:03:31,768 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [430173867] [2023-11-06 23:03:31,768 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [430173867] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-06 23:03:31,768 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-06 23:03:31,768 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-06 23:03:31,768 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1020634813] [2023-11-06 23:03:31,769 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 23:03:31,769 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-06 23:03:31,769 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 23:03:31,770 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-06 23:03:31,770 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-11-06 23:03:31,793 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 55 out of 131 [2023-11-06 23:03:31,794 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 29 places, 24 transitions, 134 flow. Second operand has 5 states, 5 states have (on average 56.6) internal successors, (283), 5 states have internal predecessors, (283), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 23:03:31,794 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 23:03:31,794 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 55 of 131 [2023-11-06 23:03:31,794 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 23:03:31,902 INFO L124 PetriNetUnfolderBase]: 114/199 cut-off events. [2023-11-06 23:03:31,902 INFO L125 PetriNetUnfolderBase]: For 280/280 co-relation queries the response was YES. [2023-11-06 23:03:31,903 INFO L83 FinitePrefix]: Finished finitePrefix Result has 654 conditions, 199 events. 114/199 cut-off events. For 280/280 co-relation queries the response was YES. Maximal size of possible extension queue 20. Compared 618 event pairs, 19 based on Foata normal form. 10/209 useless extension candidates. Maximal degree in co-relation 636. Up to 84 conditions per place. [2023-11-06 23:03:31,907 INFO L140 encePairwiseOnDemand]: 126/131 looper letters, 29 selfloop transitions, 9 changer transitions 4/42 dead transitions. [2023-11-06 23:03:31,907 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 33 places, 42 transitions, 284 flow [2023-11-06 23:03:31,908 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-06 23:03:31,908 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-11-06 23:03:31,909 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 308 transitions. [2023-11-06 23:03:31,909 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.47022900763358777 [2023-11-06 23:03:31,909 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 308 transitions. [2023-11-06 23:03:31,910 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 308 transitions. [2023-11-06 23:03:31,910 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 23:03:31,910 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 308 transitions. [2023-11-06 23:03:31,911 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 61.6) internal successors, (308), 5 states have internal predecessors, (308), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 23:03:31,913 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 131.0) internal successors, (786), 6 states have internal predecessors, (786), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 23:03:31,914 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 131.0) internal successors, (786), 6 states have internal predecessors, (786), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 23:03:31,914 INFO L175 Difference]: Start difference. First operand has 29 places, 24 transitions, 134 flow. Second operand 5 states and 308 transitions. [2023-11-06 23:03:31,915 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 33 places, 42 transitions, 284 flow [2023-11-06 23:03:31,920 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 33 places, 42 transitions, 282 flow, removed 1 selfloop flow, removed 0 redundant places. [2023-11-06 23:03:31,922 INFO L231 Difference]: Finished difference. Result has 35 places, 26 transitions, 182 flow [2023-11-06 23:03:31,922 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=131, PETRI_DIFFERENCE_MINUEND_FLOW=132, PETRI_DIFFERENCE_MINUEND_PLACES=29, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=24, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=15, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=182, PETRI_PLACES=35, PETRI_TRANSITIONS=26} [2023-11-06 23:03:31,924 INFO L281 CegarLoopForPetriNet]: 18 programPoint places, 17 predicate places. [2023-11-06 23:03:31,927 INFO L495 AbstractCegarLoop]: Abstraction has has 35 places, 26 transitions, 182 flow [2023-11-06 23:03:31,928 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 56.6) internal successors, (283), 5 states have internal predecessors, (283), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 23:03:31,928 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 23:03:31,928 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 23:03:31,928 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-11-06 23:03:31,929 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-06 23:03:31,929 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 23:03:31,929 INFO L85 PathProgramCache]: Analyzing trace with hash 1274942511, now seen corresponding path program 1 times [2023-11-06 23:03:31,929 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 23:03:31,930 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1583673980] [2023-11-06 23:03:31,930 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 23:03:31,930 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 23:03:31,959 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 23:03:32,119 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 23:03:32,119 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 23:03:32,119 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1583673980] [2023-11-06 23:03:32,120 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1583673980] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-06 23:03:32,120 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-06 23:03:32,120 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-11-06 23:03:32,121 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1596685592] [2023-11-06 23:03:32,121 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 23:03:32,122 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-11-06 23:03:32,122 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 23:03:32,125 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-11-06 23:03:32,125 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2023-11-06 23:03:32,164 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 55 out of 131 [2023-11-06 23:03:32,165 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 35 places, 26 transitions, 182 flow. Second operand has 6 states, 6 states have (on average 56.666666666666664) internal successors, (340), 6 states have internal predecessors, (340), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 23:03:32,166 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 23:03:32,166 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 55 of 131 [2023-11-06 23:03:32,166 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 23:03:32,360 INFO L124 PetriNetUnfolderBase]: 126/219 cut-off events. [2023-11-06 23:03:32,361 INFO L125 PetriNetUnfolderBase]: For 533/533 co-relation queries the response was YES. [2023-11-06 23:03:32,363 INFO L83 FinitePrefix]: Finished finitePrefix Result has 794 conditions, 219 events. 126/219 cut-off events. For 533/533 co-relation queries the response was YES. Maximal size of possible extension queue 21. Compared 714 event pairs, 19 based on Foata normal form. 4/223 useless extension candidates. Maximal degree in co-relation 772. Up to 86 conditions per place. [2023-11-06 23:03:32,364 INFO L140 encePairwiseOnDemand]: 126/131 looper letters, 32 selfloop transitions, 16 changer transitions 11/59 dead transitions. [2023-11-06 23:03:32,365 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 43 places, 59 transitions, 425 flow [2023-11-06 23:03:32,365 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-11-06 23:03:32,365 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2023-11-06 23:03:32,367 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 547 transitions. [2023-11-06 23:03:32,368 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46395250212044103 [2023-11-06 23:03:32,368 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 547 transitions. [2023-11-06 23:03:32,368 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 547 transitions. [2023-11-06 23:03:32,369 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 23:03:32,369 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 547 transitions. [2023-11-06 23:03:32,371 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 60.77777777777778) internal successors, (547), 9 states have internal predecessors, (547), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 23:03:32,375 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 131.0) internal successors, (1310), 10 states have internal predecessors, (1310), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 23:03:32,376 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 131.0) internal successors, (1310), 10 states have internal predecessors, (1310), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 23:03:32,376 INFO L175 Difference]: Start difference. First operand has 35 places, 26 transitions, 182 flow. Second operand 9 states and 547 transitions. [2023-11-06 23:03:32,376 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 43 places, 59 transitions, 425 flow [2023-11-06 23:03:32,384 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 39 places, 59 transitions, 388 flow, removed 9 selfloop flow, removed 4 redundant places. [2023-11-06 23:03:32,386 INFO L231 Difference]: Finished difference. Result has 42 places, 32 transitions, 251 flow [2023-11-06 23:03:32,386 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=131, PETRI_DIFFERENCE_MINUEND_FLOW=156, PETRI_DIFFERENCE_MINUEND_PLACES=31, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=26, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=13, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=251, PETRI_PLACES=42, PETRI_TRANSITIONS=32} [2023-11-06 23:03:32,388 INFO L281 CegarLoopForPetriNet]: 18 programPoint places, 24 predicate places. [2023-11-06 23:03:32,389 INFO L495 AbstractCegarLoop]: Abstraction has has 42 places, 32 transitions, 251 flow [2023-11-06 23:03:32,389 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 56.666666666666664) internal successors, (340), 6 states have internal predecessors, (340), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 23:03:32,389 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 23:03:32,389 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 23:03:32,390 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-11-06 23:03:32,390 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-06 23:03:32,390 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 23:03:32,390 INFO L85 PathProgramCache]: Analyzing trace with hash 1275101541, now seen corresponding path program 2 times [2023-11-06 23:03:32,391 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 23:03:32,391 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [175298316] [2023-11-06 23:03:32,391 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 23:03:32,391 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 23:03:32,412 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 23:03:32,505 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 23:03:32,505 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 23:03:32,506 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [175298316] [2023-11-06 23:03:32,506 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [175298316] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-06 23:03:32,506 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-06 23:03:32,506 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-11-06 23:03:32,507 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [896170371] [2023-11-06 23:03:32,507 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 23:03:32,507 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-11-06 23:03:32,507 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 23:03:32,508 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-11-06 23:03:32,508 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2023-11-06 23:03:32,535 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 55 out of 131 [2023-11-06 23:03:32,536 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 42 places, 32 transitions, 251 flow. Second operand has 6 states, 6 states have (on average 56.666666666666664) internal successors, (340), 6 states have internal predecessors, (340), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 23:03:32,536 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 23:03:32,536 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 55 of 131 [2023-11-06 23:03:32,536 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 23:03:32,662 INFO L124 PetriNetUnfolderBase]: 162/283 cut-off events. [2023-11-06 23:03:32,662 INFO L125 PetriNetUnfolderBase]: For 793/793 co-relation queries the response was YES. [2023-11-06 23:03:32,664 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1090 conditions, 283 events. 162/283 cut-off events. For 793/793 co-relation queries the response was YES. Maximal size of possible extension queue 24. Compared 956 event pairs, 22 based on Foata normal form. 8/291 useless extension candidates. Maximal degree in co-relation 1066. Up to 77 conditions per place. [2023-11-06 23:03:32,666 INFO L140 encePairwiseOnDemand]: 126/131 looper letters, 38 selfloop transitions, 20 changer transitions 3/61 dead transitions. [2023-11-06 23:03:32,666 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 49 places, 61 transitions, 497 flow [2023-11-06 23:03:32,667 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-11-06 23:03:32,667 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2023-11-06 23:03:32,669 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 486 transitions. [2023-11-06 23:03:32,669 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4637404580152672 [2023-11-06 23:03:32,669 INFO L72 ComplementDD]: Start complementDD. Operand 8 states and 486 transitions. [2023-11-06 23:03:32,669 INFO L73 IsDeterministic]: Start isDeterministic. Operand 8 states and 486 transitions. [2023-11-06 23:03:32,670 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 23:03:32,670 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 8 states and 486 transitions. [2023-11-06 23:03:32,672 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 9 states, 8 states have (on average 60.75) internal successors, (486), 8 states have internal predecessors, (486), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 23:03:32,674 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 9 states, 9 states have (on average 131.0) internal successors, (1179), 9 states have internal predecessors, (1179), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 23:03:32,675 INFO L81 ComplementDD]: Finished complementDD. Result has 9 states, 9 states have (on average 131.0) internal successors, (1179), 9 states have internal predecessors, (1179), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 23:03:32,675 INFO L175 Difference]: Start difference. First operand has 42 places, 32 transitions, 251 flow. Second operand 8 states and 486 transitions. [2023-11-06 23:03:32,675 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 49 places, 61 transitions, 497 flow [2023-11-06 23:03:32,680 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 47 places, 61 transitions, 467 flow, removed 9 selfloop flow, removed 2 redundant places. [2023-11-06 23:03:32,682 INFO L231 Difference]: Finished difference. Result has 51 places, 38 transitions, 344 flow [2023-11-06 23:03:32,682 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=131, PETRI_DIFFERENCE_MINUEND_FLOW=221, PETRI_DIFFERENCE_MINUEND_PLACES=40, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=32, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=14, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=15, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=344, PETRI_PLACES=51, PETRI_TRANSITIONS=38} [2023-11-06 23:03:32,685 INFO L281 CegarLoopForPetriNet]: 18 programPoint places, 33 predicate places. [2023-11-06 23:03:32,685 INFO L495 AbstractCegarLoop]: Abstraction has has 51 places, 38 transitions, 344 flow [2023-11-06 23:03:32,685 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 56.666666666666664) internal successors, (340), 6 states have internal predecessors, (340), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 23:03:32,685 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 23:03:32,685 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 23:03:32,686 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2023-11-06 23:03:32,686 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-06 23:03:32,687 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 23:03:32,687 INFO L85 PathProgramCache]: Analyzing trace with hash 1305502311, now seen corresponding path program 3 times [2023-11-06 23:03:32,687 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 23:03:32,687 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1614249989] [2023-11-06 23:03:32,687 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 23:03:32,688 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 23:03:32,701 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 23:03:32,829 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 23:03:32,829 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 23:03:32,830 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1614249989] [2023-11-06 23:03:32,830 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1614249989] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-06 23:03:32,830 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-06 23:03:32,830 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-11-06 23:03:32,830 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [594942038] [2023-11-06 23:03:32,831 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 23:03:32,831 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-11-06 23:03:32,831 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 23:03:32,833 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-11-06 23:03:32,834 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2023-11-06 23:03:32,885 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 55 out of 131 [2023-11-06 23:03:32,886 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 51 places, 38 transitions, 344 flow. Second operand has 6 states, 6 states have (on average 56.666666666666664) internal successors, (340), 6 states have internal predecessors, (340), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 23:03:32,886 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 23:03:32,886 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 55 of 131 [2023-11-06 23:03:32,886 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 23:03:33,021 INFO L124 PetriNetUnfolderBase]: 150/263 cut-off events. [2023-11-06 23:03:33,021 INFO L125 PetriNetUnfolderBase]: For 1223/1223 co-relation queries the response was YES. [2023-11-06 23:03:33,023 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1191 conditions, 263 events. 150/263 cut-off events. For 1223/1223 co-relation queries the response was YES. Maximal size of possible extension queue 24. Compared 884 event pairs, 22 based on Foata normal form. 8/271 useless extension candidates. Maximal degree in co-relation 1163. Up to 65 conditions per place. [2023-11-06 23:03:33,025 INFO L140 encePairwiseOnDemand]: 126/131 looper letters, 30 selfloop transitions, 20 changer transitions 8/58 dead transitions. [2023-11-06 23:03:33,025 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 57 places, 58 transitions, 566 flow [2023-11-06 23:03:33,025 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-11-06 23:03:33,025 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2023-11-06 23:03:33,027 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 425 transitions. [2023-11-06 23:03:33,028 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46346782988004365 [2023-11-06 23:03:33,028 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 425 transitions. [2023-11-06 23:03:33,028 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 425 transitions. [2023-11-06 23:03:33,028 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 23:03:33,029 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 425 transitions. [2023-11-06 23:03:33,030 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 60.714285714285715) internal successors, (425), 7 states have internal predecessors, (425), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 23:03:33,032 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 131.0) internal successors, (1048), 8 states have internal predecessors, (1048), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 23:03:33,033 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 131.0) internal successors, (1048), 8 states have internal predecessors, (1048), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 23:03:33,033 INFO L175 Difference]: Start difference. First operand has 51 places, 38 transitions, 344 flow. Second operand 7 states and 425 transitions. [2023-11-06 23:03:33,033 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 57 places, 58 transitions, 566 flow [2023-11-06 23:03:33,041 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 54 places, 58 transitions, 531 flow, removed 9 selfloop flow, removed 3 redundant places. [2023-11-06 23:03:33,043 INFO L231 Difference]: Finished difference. Result has 56 places, 39 transitions, 388 flow [2023-11-06 23:03:33,043 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=131, PETRI_DIFFERENCE_MINUEND_FLOW=309, PETRI_DIFFERENCE_MINUEND_PLACES=48, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=38, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=19, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=18, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=388, PETRI_PLACES=56, PETRI_TRANSITIONS=39} [2023-11-06 23:03:33,044 INFO L281 CegarLoopForPetriNet]: 18 programPoint places, 38 predicate places. [2023-11-06 23:03:33,044 INFO L495 AbstractCegarLoop]: Abstraction has has 56 places, 39 transitions, 388 flow [2023-11-06 23:03:33,045 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 56.666666666666664) internal successors, (340), 6 states have internal predecessors, (340), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 23:03:33,045 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 23:03:33,045 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 23:03:33,045 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2023-11-06 23:03:33,046 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-06 23:03:33,046 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 23:03:33,046 INFO L85 PathProgramCache]: Analyzing trace with hash 1815886077, now seen corresponding path program 4 times [2023-11-06 23:03:33,047 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 23:03:33,047 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1094326390] [2023-11-06 23:03:33,047 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 23:03:33,047 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 23:03:33,060 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 23:03:33,166 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 23:03:33,166 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 23:03:33,166 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1094326390] [2023-11-06 23:03:33,166 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1094326390] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-06 23:03:33,167 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1955234440] [2023-11-06 23:03:33,167 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-11-06 23:03:33,167 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 23:03:33,167 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0dcf83f7-8b7f-4f8b-857f-2b32dfddd8be/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 23:03:33,175 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0dcf83f7-8b7f-4f8b-857f-2b32dfddd8be/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 23:03:33,210 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0dcf83f7-8b7f-4f8b-857f-2b32dfddd8be/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-11-06 23:03:33,280 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-11-06 23:03:33,281 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-06 23:03:33,283 INFO L262 TraceCheckSpWp]: Trace formula consists of 119 conjuncts, 9 conjunts are in the unsatisfiable core [2023-11-06 23:03:33,287 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 23:03:33,390 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 23:03:33,391 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 23:03:33,516 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 23:03:33,517 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1955234440] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-06 23:03:33,517 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-06 23:03:33,517 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 10 [2023-11-06 23:03:33,517 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1885201271] [2023-11-06 23:03:33,517 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-06 23:03:33,518 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-11-06 23:03:33,518 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 23:03:33,519 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-11-06 23:03:33,519 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=95, Unknown=0, NotChecked=0, Total=132 [2023-11-06 23:03:33,563 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 55 out of 131 [2023-11-06 23:03:33,564 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 56 places, 39 transitions, 388 flow. Second operand has 12 states, 12 states have (on average 56.916666666666664) internal successors, (683), 12 states have internal predecessors, (683), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 23:03:33,564 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 23:03:33,565 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 55 of 131 [2023-11-06 23:03:33,565 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 23:03:33,836 INFO L124 PetriNetUnfolderBase]: 198/343 cut-off events. [2023-11-06 23:03:33,836 INFO L125 PetriNetUnfolderBase]: For 2136/2136 co-relation queries the response was YES. [2023-11-06 23:03:33,838 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1658 conditions, 343 events. 198/343 cut-off events. For 2136/2136 co-relation queries the response was YES. Maximal size of possible extension queue 25. Compared 1141 event pairs, 18 based on Foata normal form. 16/359 useless extension candidates. Maximal degree in co-relation 1628. Up to 87 conditions per place. [2023-11-06 23:03:33,840 INFO L140 encePairwiseOnDemand]: 126/131 looper letters, 34 selfloop transitions, 35 changer transitions 22/91 dead transitions. [2023-11-06 23:03:33,840 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 69 places, 91 transitions, 946 flow [2023-11-06 23:03:33,841 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2023-11-06 23:03:33,841 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2023-11-06 23:03:33,844 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 844 transitions. [2023-11-06 23:03:33,844 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.460196292257361 [2023-11-06 23:03:33,845 INFO L72 ComplementDD]: Start complementDD. Operand 14 states and 844 transitions. [2023-11-06 23:03:33,845 INFO L73 IsDeterministic]: Start isDeterministic. Operand 14 states and 844 transitions. [2023-11-06 23:03:33,846 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 23:03:33,846 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 14 states and 844 transitions. [2023-11-06 23:03:33,848 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 15 states, 14 states have (on average 60.285714285714285) internal successors, (844), 14 states have internal predecessors, (844), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 23:03:33,852 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 15 states, 15 states have (on average 131.0) internal successors, (1965), 15 states have internal predecessors, (1965), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 23:03:33,853 INFO L81 ComplementDD]: Finished complementDD. Result has 15 states, 15 states have (on average 131.0) internal successors, (1965), 15 states have internal predecessors, (1965), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 23:03:33,853 INFO L175 Difference]: Start difference. First operand has 56 places, 39 transitions, 388 flow. Second operand 14 states and 844 transitions. [2023-11-06 23:03:33,853 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 69 places, 91 transitions, 946 flow [2023-11-06 23:03:33,862 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 64 places, 91 transitions, 884 flow, removed 15 selfloop flow, removed 5 redundant places. [2023-11-06 23:03:33,865 INFO L231 Difference]: Finished difference. Result has 69 places, 55 transitions, 689 flow [2023-11-06 23:03:33,865 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=131, PETRI_DIFFERENCE_MINUEND_FLOW=346, PETRI_DIFFERENCE_MINUEND_PLACES=51, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=39, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=25, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=13, PETRI_DIFFERENCE_SUBTRAHEND_STATES=14, PETRI_FLOW=689, PETRI_PLACES=69, PETRI_TRANSITIONS=55} [2023-11-06 23:03:33,865 INFO L281 CegarLoopForPetriNet]: 18 programPoint places, 51 predicate places. [2023-11-06 23:03:33,866 INFO L495 AbstractCegarLoop]: Abstraction has has 69 places, 55 transitions, 689 flow [2023-11-06 23:03:33,866 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 56.916666666666664) internal successors, (683), 12 states have internal predecessors, (683), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 23:03:33,866 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 23:03:33,867 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 23:03:33,877 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0dcf83f7-8b7f-4f8b-857f-2b32dfddd8be/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-11-06 23:03:34,072 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0dcf83f7-8b7f-4f8b-857f-2b32dfddd8be/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 23:03:34,073 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-06 23:03:34,073 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 23:03:34,073 INFO L85 PathProgramCache]: Analyzing trace with hash 173906857, now seen corresponding path program 5 times [2023-11-06 23:03:34,073 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 23:03:34,073 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1187746527] [2023-11-06 23:03:34,074 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 23:03:34,074 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 23:03:34,089 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 23:03:34,249 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-06 23:03:34,249 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 23:03:34,249 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1187746527] [2023-11-06 23:03:34,249 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1187746527] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-06 23:03:34,250 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [577400413] [2023-11-06 23:03:34,250 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-11-06 23:03:34,250 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 23:03:34,250 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0dcf83f7-8b7f-4f8b-857f-2b32dfddd8be/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 23:03:34,251 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0dcf83f7-8b7f-4f8b-857f-2b32dfddd8be/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 23:03:34,277 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0dcf83f7-8b7f-4f8b-857f-2b32dfddd8be/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-11-06 23:03:34,337 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2023-11-06 23:03:34,338 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-06 23:03:34,339 INFO L262 TraceCheckSpWp]: Trace formula consists of 134 conjuncts, 11 conjunts are in the unsatisfiable core [2023-11-06 23:03:34,341 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 23:03:34,419 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-06 23:03:34,419 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 23:03:34,589 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-06 23:03:34,589 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [577400413] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-06 23:03:34,590 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-06 23:03:34,590 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 14 [2023-11-06 23:03:34,590 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1397632236] [2023-11-06 23:03:34,590 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-06 23:03:34,591 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2023-11-06 23:03:34,591 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 23:03:34,592 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2023-11-06 23:03:34,592 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=175, Unknown=0, NotChecked=0, Total=240 [2023-11-06 23:03:34,656 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 55 out of 131 [2023-11-06 23:03:34,657 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 69 places, 55 transitions, 689 flow. Second operand has 16 states, 16 states have (on average 56.8125) internal successors, (909), 16 states have internal predecessors, (909), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 23:03:34,657 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 23:03:34,657 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 55 of 131 [2023-11-06 23:03:34,658 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 23:03:34,981 INFO L124 PetriNetUnfolderBase]: 254/455 cut-off events. [2023-11-06 23:03:34,981 INFO L125 PetriNetUnfolderBase]: For 4621/4621 co-relation queries the response was YES. [2023-11-06 23:03:34,983 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2435 conditions, 455 events. 254/455 cut-off events. For 4621/4621 co-relation queries the response was YES. Maximal size of possible extension queue 26. Compared 1591 event pairs, 55 based on Foata normal form. 32/487 useless extension candidates. Maximal degree in co-relation 2400. Up to 249 conditions per place. [2023-11-06 23:03:34,986 INFO L140 encePairwiseOnDemand]: 126/131 looper letters, 65 selfloop transitions, 25 changer transitions 27/117 dead transitions. [2023-11-06 23:03:34,987 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 84 places, 117 transitions, 1455 flow [2023-11-06 23:03:34,987 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2023-11-06 23:03:34,987 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2023-11-06 23:03:34,990 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 963 transitions. [2023-11-06 23:03:34,991 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4594465648854962 [2023-11-06 23:03:34,991 INFO L72 ComplementDD]: Start complementDD. Operand 16 states and 963 transitions. [2023-11-06 23:03:34,992 INFO L73 IsDeterministic]: Start isDeterministic. Operand 16 states and 963 transitions. [2023-11-06 23:03:34,993 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 23:03:34,993 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 16 states and 963 transitions. [2023-11-06 23:03:34,996 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 17 states, 16 states have (on average 60.1875) internal successors, (963), 16 states have internal predecessors, (963), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 23:03:35,000 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 17 states, 17 states have (on average 131.0) internal successors, (2227), 17 states have internal predecessors, (2227), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 23:03:35,000 INFO L81 ComplementDD]: Finished complementDD. Result has 17 states, 17 states have (on average 131.0) internal successors, (2227), 17 states have internal predecessors, (2227), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 23:03:35,001 INFO L175 Difference]: Start difference. First operand has 69 places, 55 transitions, 689 flow. Second operand 16 states and 963 transitions. [2023-11-06 23:03:35,001 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 84 places, 117 transitions, 1455 flow [2023-11-06 23:03:35,019 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 79 places, 117 transitions, 1094 flow, removed 167 selfloop flow, removed 5 redundant places. [2023-11-06 23:03:35,022 INFO L231 Difference]: Finished difference. Result has 89 places, 69 transitions, 762 flow [2023-11-06 23:03:35,023 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=131, PETRI_DIFFERENCE_MINUEND_FLOW=492, PETRI_DIFFERENCE_MINUEND_PLACES=64, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=55, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=13, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=39, PETRI_DIFFERENCE_SUBTRAHEND_STATES=16, PETRI_FLOW=762, PETRI_PLACES=89, PETRI_TRANSITIONS=69} [2023-11-06 23:03:35,023 INFO L281 CegarLoopForPetriNet]: 18 programPoint places, 71 predicate places. [2023-11-06 23:03:35,024 INFO L495 AbstractCegarLoop]: Abstraction has has 89 places, 69 transitions, 762 flow [2023-11-06 23:03:35,024 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 56.8125) internal successors, (909), 16 states have internal predecessors, (909), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 23:03:35,024 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 23:03:35,025 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 23:03:35,035 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0dcf83f7-8b7f-4f8b-857f-2b32dfddd8be/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-11-06 23:03:35,230 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0dcf83f7-8b7f-4f8b-857f-2b32dfddd8be/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 23:03:35,230 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-06 23:03:35,231 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 23:03:35,231 INFO L85 PathProgramCache]: Analyzing trace with hash 118604779, now seen corresponding path program 6 times [2023-11-06 23:03:35,231 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 23:03:35,231 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [289418705] [2023-11-06 23:03:35,231 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 23:03:35,231 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 23:03:35,245 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 23:03:35,407 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-06 23:03:35,407 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 23:03:35,407 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [289418705] [2023-11-06 23:03:35,408 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [289418705] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-06 23:03:35,408 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1372978098] [2023-11-06 23:03:35,408 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-11-06 23:03:35,408 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 23:03:35,408 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0dcf83f7-8b7f-4f8b-857f-2b32dfddd8be/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 23:03:35,409 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0dcf83f7-8b7f-4f8b-857f-2b32dfddd8be/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 23:03:35,430 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0dcf83f7-8b7f-4f8b-857f-2b32dfddd8be/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-11-06 23:03:35,499 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2023-11-06 23:03:35,499 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-06 23:03:35,500 INFO L262 TraceCheckSpWp]: Trace formula consists of 134 conjuncts, 11 conjunts are in the unsatisfiable core [2023-11-06 23:03:35,502 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 23:03:35,617 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-06 23:03:35,617 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 23:03:35,769 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-06 23:03:35,769 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1372978098] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-06 23:03:35,769 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-06 23:03:35,769 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 15 [2023-11-06 23:03:35,769 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [251888538] [2023-11-06 23:03:35,769 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-06 23:03:35,770 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2023-11-06 23:03:35,770 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 23:03:35,771 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2023-11-06 23:03:35,771 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=212, Unknown=0, NotChecked=0, Total=272 [2023-11-06 23:03:35,842 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 55 out of 131 [2023-11-06 23:03:35,844 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 89 places, 69 transitions, 762 flow. Second operand has 17 states, 17 states have (on average 56.8235294117647) internal successors, (966), 17 states have internal predecessors, (966), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 23:03:35,844 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 23:03:35,844 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 55 of 131 [2023-11-06 23:03:35,844 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 23:03:36,402 INFO L124 PetriNetUnfolderBase]: 408/747 cut-off events. [2023-11-06 23:03:36,402 INFO L125 PetriNetUnfolderBase]: For 12692/12692 co-relation queries the response was YES. [2023-11-06 23:03:36,406 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4031 conditions, 747 events. 408/747 cut-off events. For 12692/12692 co-relation queries the response was YES. Maximal size of possible extension queue 45. Compared 3260 event pairs, 44 based on Foata normal form. 32/779 useless extension candidates. Maximal degree in co-relation 3987. Up to 227 conditions per place. [2023-11-06 23:03:36,410 INFO L140 encePairwiseOnDemand]: 126/131 looper letters, 73 selfloop transitions, 71 changer transitions 37/181 dead transitions. [2023-11-06 23:03:36,410 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 110 places, 181 transitions, 2078 flow [2023-11-06 23:03:36,411 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2023-11-06 23:03:36,411 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2023-11-06 23:03:36,415 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 1324 transitions. [2023-11-06 23:03:36,416 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4594031922276197 [2023-11-06 23:03:36,416 INFO L72 ComplementDD]: Start complementDD. Operand 22 states and 1324 transitions. [2023-11-06 23:03:36,416 INFO L73 IsDeterministic]: Start isDeterministic. Operand 22 states and 1324 transitions. [2023-11-06 23:03:36,417 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 23:03:36,417 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 22 states and 1324 transitions. [2023-11-06 23:03:36,421 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 23 states, 22 states have (on average 60.18181818181818) internal successors, (1324), 22 states have internal predecessors, (1324), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 23:03:36,426 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 23 states, 23 states have (on average 131.0) internal successors, (3013), 23 states have internal predecessors, (3013), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 23:03:36,428 INFO L81 ComplementDD]: Finished complementDD. Result has 23 states, 23 states have (on average 131.0) internal successors, (3013), 23 states have internal predecessors, (3013), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 23:03:36,428 INFO L175 Difference]: Start difference. First operand has 89 places, 69 transitions, 762 flow. Second operand 22 states and 1324 transitions. [2023-11-06 23:03:36,428 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 110 places, 181 transitions, 2078 flow [2023-11-06 23:03:36,518 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 106 places, 181 transitions, 1986 flow, removed 38 selfloop flow, removed 4 redundant places. [2023-11-06 23:03:36,522 INFO L231 Difference]: Finished difference. Result has 120 places, 107 transitions, 1489 flow [2023-11-06 23:03:36,523 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=131, PETRI_DIFFERENCE_MINUEND_FLOW=670, PETRI_DIFFERENCE_MINUEND_PLACES=85, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=69, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=36, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=23, PETRI_DIFFERENCE_SUBTRAHEND_STATES=22, PETRI_FLOW=1489, PETRI_PLACES=120, PETRI_TRANSITIONS=107} [2023-11-06 23:03:36,523 INFO L281 CegarLoopForPetriNet]: 18 programPoint places, 102 predicate places. [2023-11-06 23:03:36,524 INFO L495 AbstractCegarLoop]: Abstraction has has 120 places, 107 transitions, 1489 flow [2023-11-06 23:03:36,524 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 56.8235294117647) internal successors, (966), 17 states have internal predecessors, (966), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 23:03:36,524 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 23:03:36,525 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 23:03:36,536 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0dcf83f7-8b7f-4f8b-857f-2b32dfddd8be/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2023-11-06 23:03:36,735 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0dcf83f7-8b7f-4f8b-857f-2b32dfddd8be/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 23:03:36,736 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-06 23:03:36,736 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 23:03:36,736 INFO L85 PathProgramCache]: Analyzing trace with hash 1404710505, now seen corresponding path program 7 times [2023-11-06 23:03:36,736 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 23:03:36,737 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [659896805] [2023-11-06 23:03:36,737 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 23:03:36,737 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 23:03:36,759 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 23:03:36,904 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-06 23:03:36,904 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 23:03:36,904 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [659896805] [2023-11-06 23:03:36,904 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [659896805] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-06 23:03:36,905 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [622967744] [2023-11-06 23:03:36,905 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-11-06 23:03:36,905 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 23:03:36,905 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0dcf83f7-8b7f-4f8b-857f-2b32dfddd8be/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 23:03:36,906 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0dcf83f7-8b7f-4f8b-857f-2b32dfddd8be/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 23:03:36,936 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0dcf83f7-8b7f-4f8b-857f-2b32dfddd8be/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-11-06 23:03:36,996 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 23:03:36,997 INFO L262 TraceCheckSpWp]: Trace formula consists of 134 conjuncts, 11 conjunts are in the unsatisfiable core [2023-11-06 23:03:36,998 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 23:03:37,047 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-06 23:03:37,048 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 23:03:37,156 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-06 23:03:37,156 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [622967744] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-06 23:03:37,157 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-06 23:03:37,157 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 14 [2023-11-06 23:03:37,157 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [434222569] [2023-11-06 23:03:37,157 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-06 23:03:37,158 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2023-11-06 23:03:37,159 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 23:03:37,160 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2023-11-06 23:03:37,160 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=180, Unknown=0, NotChecked=0, Total=240 [2023-11-06 23:03:37,208 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 55 out of 131 [2023-11-06 23:03:37,209 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 120 places, 107 transitions, 1489 flow. Second operand has 16 states, 16 states have (on average 56.8125) internal successors, (909), 16 states have internal predecessors, (909), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 23:03:37,209 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 23:03:37,209 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 55 of 131 [2023-11-06 23:03:37,210 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 23:03:37,963 INFO L124 PetriNetUnfolderBase]: 632/1131 cut-off events. [2023-11-06 23:03:37,963 INFO L125 PetriNetUnfolderBase]: For 36478/36478 co-relation queries the response was YES. [2023-11-06 23:03:37,969 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7982 conditions, 1131 events. 632/1131 cut-off events. For 36478/36478 co-relation queries the response was YES. Maximal size of possible extension queue 70. Compared 5406 event pairs, 26 based on Foata normal form. 32/1163 useless extension candidates. Maximal degree in co-relation 7923. Up to 363 conditions per place. [2023-11-06 23:03:37,978 INFO L140 encePairwiseOnDemand]: 126/131 looper letters, 71 selfloop transitions, 133 changer transitions 46/250 dead transitions. [2023-11-06 23:03:37,978 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 145 places, 250 transitions, 3773 flow [2023-11-06 23:03:37,978 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2023-11-06 23:03:37,978 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2023-11-06 23:03:37,983 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 1565 transitions. [2023-11-06 23:03:37,984 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45948326482677626 [2023-11-06 23:03:37,984 INFO L72 ComplementDD]: Start complementDD. Operand 26 states and 1565 transitions. [2023-11-06 23:03:37,985 INFO L73 IsDeterministic]: Start isDeterministic. Operand 26 states and 1565 transitions. [2023-11-06 23:03:37,986 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 23:03:37,986 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 26 states and 1565 transitions. [2023-11-06 23:03:37,990 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 27 states, 26 states have (on average 60.19230769230769) internal successors, (1565), 26 states have internal predecessors, (1565), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 23:03:37,997 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 27 states, 27 states have (on average 131.0) internal successors, (3537), 27 states have internal predecessors, (3537), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 23:03:37,999 INFO L81 ComplementDD]: Finished complementDD. Result has 27 states, 27 states have (on average 131.0) internal successors, (3537), 27 states have internal predecessors, (3537), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 23:03:37,999 INFO L175 Difference]: Start difference. First operand has 120 places, 107 transitions, 1489 flow. Second operand 26 states and 1565 transitions. [2023-11-06 23:03:37,999 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 145 places, 250 transitions, 3773 flow [2023-11-06 23:03:38,087 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 138 places, 250 transitions, 3441 flow, removed 152 selfloop flow, removed 7 redundant places. [2023-11-06 23:03:38,093 INFO L231 Difference]: Finished difference. Result has 152 places, 161 transitions, 2619 flow [2023-11-06 23:03:38,093 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=131, PETRI_DIFFERENCE_MINUEND_FLOW=1241, PETRI_DIFFERENCE_MINUEND_PLACES=113, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=107, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=83, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=17, PETRI_DIFFERENCE_SUBTRAHEND_STATES=26, PETRI_FLOW=2619, PETRI_PLACES=152, PETRI_TRANSITIONS=161} [2023-11-06 23:03:38,094 INFO L281 CegarLoopForPetriNet]: 18 programPoint places, 134 predicate places. [2023-11-06 23:03:38,094 INFO L495 AbstractCegarLoop]: Abstraction has has 152 places, 161 transitions, 2619 flow [2023-11-06 23:03:38,095 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 56.8125) internal successors, (909), 16 states have internal predecessors, (909), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 23:03:38,095 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 23:03:38,095 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 23:03:38,106 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0dcf83f7-8b7f-4f8b-857f-2b32dfddd8be/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2023-11-06 23:03:38,301 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0dcf83f7-8b7f-4f8b-857f-2b32dfddd8be/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2023-11-06 23:03:38,301 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-06 23:03:38,302 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 23:03:38,302 INFO L85 PathProgramCache]: Analyzing trace with hash -1383414637, now seen corresponding path program 8 times [2023-11-06 23:03:38,302 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 23:03:38,302 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1778971050] [2023-11-06 23:03:38,302 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 23:03:38,302 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 23:03:38,319 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 23:03:38,542 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 23:03:38,543 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 23:03:38,543 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1778971050] [2023-11-06 23:03:38,543 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1778971050] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-06 23:03:38,543 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1674306906] [2023-11-06 23:03:38,543 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-06 23:03:38,544 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 23:03:38,544 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0dcf83f7-8b7f-4f8b-857f-2b32dfddd8be/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 23:03:38,545 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0dcf83f7-8b7f-4f8b-857f-2b32dfddd8be/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 23:03:38,566 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0dcf83f7-8b7f-4f8b-857f-2b32dfddd8be/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-11-06 23:03:38,632 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-11-06 23:03:38,632 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-06 23:03:38,633 INFO L262 TraceCheckSpWp]: Trace formula consists of 149 conjuncts, 16 conjunts are in the unsatisfiable core [2023-11-06 23:03:38,635 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 23:03:38,699 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 23:03:38,700 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 23:03:38,898 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 23:03:38,898 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1674306906] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-06 23:03:38,898 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-06 23:03:38,898 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 23 [2023-11-06 23:03:38,899 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [399285465] [2023-11-06 23:03:38,899 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-06 23:03:38,899 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2023-11-06 23:03:38,900 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 23:03:38,900 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2023-11-06 23:03:38,901 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=146, Invalid=454, Unknown=0, NotChecked=0, Total=600 [2023-11-06 23:03:38,981 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 55 out of 131 [2023-11-06 23:03:38,983 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 152 places, 161 transitions, 2619 flow. Second operand has 25 states, 25 states have (on average 56.44) internal successors, (1411), 25 states have internal predecessors, (1411), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 23:03:38,983 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 23:03:38,983 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 55 of 131 [2023-11-06 23:03:38,983 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 23:03:40,336 INFO L124 PetriNetUnfolderBase]: 1004/1767 cut-off events. [2023-11-06 23:03:40,337 INFO L125 PetriNetUnfolderBase]: For 100324/100324 co-relation queries the response was YES. [2023-11-06 23:03:40,348 INFO L83 FinitePrefix]: Finished finitePrefix Result has 16354 conditions, 1767 events. 1004/1767 cut-off events. For 100324/100324 co-relation queries the response was YES. Maximal size of possible extension queue 83. Compared 8576 event pairs, 20 based on Foata normal form. 48/1815 useless extension candidates. Maximal degree in co-relation 16281. Up to 606 conditions per place. [2023-11-06 23:03:40,410 INFO L140 encePairwiseOnDemand]: 126/131 looper letters, 77 selfloop transitions, 229 changer transitions 74/380 dead transitions. [2023-11-06 23:03:40,410 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 191 places, 380 transitions, 8097 flow [2023-11-06 23:03:40,411 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2023-11-06 23:03:40,411 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 40 states. [2023-11-06 23:03:40,417 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 2403 transitions. [2023-11-06 23:03:40,419 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.458587786259542 [2023-11-06 23:03:40,420 INFO L72 ComplementDD]: Start complementDD. Operand 40 states and 2403 transitions. [2023-11-06 23:03:40,420 INFO L73 IsDeterministic]: Start isDeterministic. Operand 40 states and 2403 transitions. [2023-11-06 23:03:40,421 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 23:03:40,422 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 40 states and 2403 transitions. [2023-11-06 23:03:40,428 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 41 states, 40 states have (on average 60.075) internal successors, (2403), 40 states have internal predecessors, (2403), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 23:03:40,439 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 41 states, 41 states have (on average 131.0) internal successors, (5371), 41 states have internal predecessors, (5371), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 23:03:40,441 INFO L81 ComplementDD]: Finished complementDD. Result has 41 states, 41 states have (on average 131.0) internal successors, (5371), 41 states have internal predecessors, (5371), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 23:03:40,441 INFO L175 Difference]: Start difference. First operand has 152 places, 161 transitions, 2619 flow. Second operand 40 states and 2403 transitions. [2023-11-06 23:03:40,441 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 191 places, 380 transitions, 8097 flow [2023-11-06 23:03:40,620 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 182 places, 380 transitions, 6048 flow, removed 1003 selfloop flow, removed 9 redundant places. [2023-11-06 23:03:40,630 INFO L231 Difference]: Finished difference. Result has 201 places, 271 transitions, 4950 flow [2023-11-06 23:03:40,631 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=131, PETRI_DIFFERENCE_MINUEND_FLOW=2064, PETRI_DIFFERENCE_MINUEND_PLACES=143, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=161, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=137, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=19, PETRI_DIFFERENCE_SUBTRAHEND_STATES=40, PETRI_FLOW=4950, PETRI_PLACES=201, PETRI_TRANSITIONS=271} [2023-11-06 23:03:40,631 INFO L281 CegarLoopForPetriNet]: 18 programPoint places, 183 predicate places. [2023-11-06 23:03:40,632 INFO L495 AbstractCegarLoop]: Abstraction has has 201 places, 271 transitions, 4950 flow [2023-11-06 23:03:40,633 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 56.44) internal successors, (1411), 25 states have internal predecessors, (1411), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 23:03:40,633 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 23:03:40,633 INFO L208 CegarLoopForPetriNet]: trace histogram [10, 8, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 23:03:40,639 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0dcf83f7-8b7f-4f8b-857f-2b32dfddd8be/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2023-11-06 23:03:40,838 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0dcf83f7-8b7f-4f8b-857f-2b32dfddd8be/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2023-11-06 23:03:40,839 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-06 23:03:40,839 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 23:03:40,839 INFO L85 PathProgramCache]: Analyzing trace with hash 366049001, now seen corresponding path program 9 times [2023-11-06 23:03:40,839 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 23:03:40,840 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1009713828] [2023-11-06 23:03:40,840 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 23:03:40,840 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 23:03:40,862 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 23:03:41,274 INFO L134 CoverageAnalysis]: Checked inductivity of 73 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-06 23:03:41,274 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 23:03:41,274 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1009713828] [2023-11-06 23:03:41,275 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1009713828] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-06 23:03:41,275 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1231518825] [2023-11-06 23:03:41,275 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-11-06 23:03:41,275 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 23:03:41,275 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0dcf83f7-8b7f-4f8b-857f-2b32dfddd8be/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 23:03:41,279 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0dcf83f7-8b7f-4f8b-857f-2b32dfddd8be/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 23:03:41,303 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0dcf83f7-8b7f-4f8b-857f-2b32dfddd8be/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2023-11-06 23:03:41,393 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 9 check-sat command(s) [2023-11-06 23:03:41,394 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-06 23:03:41,396 INFO L262 TraceCheckSpWp]: Trace formula consists of 189 conjuncts, 23 conjunts are in the unsatisfiable core [2023-11-06 23:03:41,429 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 23:03:41,530 INFO L134 CoverageAnalysis]: Checked inductivity of 73 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-06 23:03:41,530 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 23:03:42,122 INFO L134 CoverageAnalysis]: Checked inductivity of 73 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-06 23:03:42,122 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1231518825] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-06 23:03:42,122 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-06 23:03:42,122 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19, 19] total 38 [2023-11-06 23:03:42,123 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1541631276] [2023-11-06 23:03:42,123 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-06 23:03:42,123 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 40 states [2023-11-06 23:03:42,124 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 23:03:42,125 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2023-11-06 23:03:42,126 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=395, Invalid=1165, Unknown=0, NotChecked=0, Total=1560 [2023-11-06 23:03:42,260 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 55 out of 131 [2023-11-06 23:03:42,265 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 201 places, 271 transitions, 4950 flow. Second operand has 40 states, 40 states have (on average 56.3) internal successors, (2252), 40 states have internal predecessors, (2252), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 23:03:42,265 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 23:03:42,265 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 55 of 131 [2023-11-06 23:03:42,266 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 23:03:44,141 INFO L124 PetriNetUnfolderBase]: 1124/2007 cut-off events. [2023-11-06 23:03:44,141 INFO L125 PetriNetUnfolderBase]: For 157895/157895 co-relation queries the response was YES. [2023-11-06 23:03:44,155 INFO L83 FinitePrefix]: Finished finitePrefix Result has 19301 conditions, 2007 events. 1124/2007 cut-off events. For 157895/157895 co-relation queries the response was YES. Maximal size of possible extension queue 83. Compared 9553 event pairs, 349 based on Foata normal form. 80/2087 useless extension candidates. Maximal degree in co-relation 19209. Up to 1529 conditions per place. [2023-11-06 23:03:44,175 INFO L140 encePairwiseOnDemand]: 126/131 looper letters, 292 selfloop transitions, 59 changer transitions 75/426 dead transitions. [2023-11-06 23:03:44,175 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 240 places, 426 transitions, 9274 flow [2023-11-06 23:03:44,176 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2023-11-06 23:03:44,176 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 40 states. [2023-11-06 23:03:44,180 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 2391 transitions. [2023-11-06 23:03:44,182 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45629770992366414 [2023-11-06 23:03:44,182 INFO L72 ComplementDD]: Start complementDD. Operand 40 states and 2391 transitions. [2023-11-06 23:03:44,182 INFO L73 IsDeterministic]: Start isDeterministic. Operand 40 states and 2391 transitions. [2023-11-06 23:03:44,183 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 23:03:44,183 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 40 states and 2391 transitions. [2023-11-06 23:03:44,189 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 41 states, 40 states have (on average 59.775) internal successors, (2391), 40 states have internal predecessors, (2391), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 23:03:44,199 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 41 states, 41 states have (on average 131.0) internal successors, (5371), 41 states have internal predecessors, (5371), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 23:03:44,201 INFO L81 ComplementDD]: Finished complementDD. Result has 41 states, 41 states have (on average 131.0) internal successors, (5371), 41 states have internal predecessors, (5371), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 23:03:44,201 INFO L175 Difference]: Start difference. First operand has 201 places, 271 transitions, 4950 flow. Second operand 40 states and 2391 transitions. [2023-11-06 23:03:44,201 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 240 places, 426 transitions, 9274 flow [2023-11-06 23:03:44,473 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 232 places, 426 transitions, 6972 flow, removed 1121 selfloop flow, removed 8 redundant places. [2023-11-06 23:03:44,484 INFO L231 Difference]: Finished difference. Result has 254 places, 301 transitions, 4773 flow [2023-11-06 23:03:44,485 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=131, PETRI_DIFFERENCE_MINUEND_FLOW=3534, PETRI_DIFFERENCE_MINUEND_PLACES=193, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=271, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=33, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=234, PETRI_DIFFERENCE_SUBTRAHEND_STATES=40, PETRI_FLOW=4773, PETRI_PLACES=254, PETRI_TRANSITIONS=301} [2023-11-06 23:03:44,486 INFO L281 CegarLoopForPetriNet]: 18 programPoint places, 236 predicate places. [2023-11-06 23:03:44,486 INFO L495 AbstractCegarLoop]: Abstraction has has 254 places, 301 transitions, 4773 flow [2023-11-06 23:03:44,487 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 40 states, 40 states have (on average 56.3) internal successors, (2252), 40 states have internal predecessors, (2252), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 23:03:44,488 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 23:03:44,488 INFO L208 CegarLoopForPetriNet]: trace histogram [10, 8, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 23:03:44,495 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0dcf83f7-8b7f-4f8b-857f-2b32dfddd8be/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2023-11-06 23:03:44,694 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0dcf83f7-8b7f-4f8b-857f-2b32dfddd8be/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2023-11-06 23:03:44,694 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-06 23:03:44,695 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 23:03:44,695 INFO L85 PathProgramCache]: Analyzing trace with hash -1689170901, now seen corresponding path program 10 times [2023-11-06 23:03:44,695 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 23:03:44,695 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [185984037] [2023-11-06 23:03:44,695 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 23:03:44,696 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 23:03:44,740 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 23:03:45,216 INFO L134 CoverageAnalysis]: Checked inductivity of 73 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-06 23:03:45,217 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 23:03:45,217 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [185984037] [2023-11-06 23:03:45,217 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [185984037] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-06 23:03:45,217 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [563443565] [2023-11-06 23:03:45,217 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-11-06 23:03:45,217 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 23:03:45,218 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0dcf83f7-8b7f-4f8b-857f-2b32dfddd8be/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 23:03:45,219 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0dcf83f7-8b7f-4f8b-857f-2b32dfddd8be/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 23:03:45,228 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0dcf83f7-8b7f-4f8b-857f-2b32dfddd8be/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2023-11-06 23:03:45,320 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-11-06 23:03:45,321 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-06 23:03:45,322 INFO L262 TraceCheckSpWp]: Trace formula consists of 194 conjuncts, 23 conjunts are in the unsatisfiable core [2023-11-06 23:03:45,324 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 23:03:45,422 INFO L134 CoverageAnalysis]: Checked inductivity of 73 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-06 23:03:45,422 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 23:03:46,034 INFO L134 CoverageAnalysis]: Checked inductivity of 73 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-06 23:03:46,034 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [563443565] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-06 23:03:46,035 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-06 23:03:46,035 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19, 19] total 39 [2023-11-06 23:03:46,035 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [306611643] [2023-11-06 23:03:46,035 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-06 23:03:46,036 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 41 states [2023-11-06 23:03:46,036 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 23:03:46,037 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2023-11-06 23:03:46,038 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=366, Invalid=1274, Unknown=0, NotChecked=0, Total=1640 [2023-11-06 23:03:46,177 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 55 out of 131 [2023-11-06 23:03:46,180 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 254 places, 301 transitions, 4773 flow. Second operand has 41 states, 41 states have (on average 56.31707317073171) internal successors, (2309), 41 states have internal predecessors, (2309), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 23:03:46,180 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 23:03:46,180 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 55 of 131 [2023-11-06 23:03:46,180 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 23:03:48,424 INFO L124 PetriNetUnfolderBase]: 1404/2567 cut-off events. [2023-11-06 23:03:48,425 INFO L125 PetriNetUnfolderBase]: For 334181/334181 co-relation queries the response was YES. [2023-11-06 23:03:48,446 INFO L83 FinitePrefix]: Finished finitePrefix Result has 24881 conditions, 2567 events. 1404/2567 cut-off events. For 334181/334181 co-relation queries the response was YES. Maximal size of possible extension queue 87. Compared 12933 event pairs, 246 based on Foata normal form. 80/2647 useless extension candidates. Maximal degree in co-relation 24767. Up to 1101 conditions per place. [2023-11-06 23:03:48,473 INFO L140 encePairwiseOnDemand]: 126/131 looper letters, 272 selfloop transitions, 184 changer transitions 87/543 dead transitions. [2023-11-06 23:03:48,473 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 299 places, 543 transitions, 10343 flow [2023-11-06 23:03:48,473 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2023-11-06 23:03:48,474 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 46 states. [2023-11-06 23:03:48,479 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 2752 transitions. [2023-11-06 23:03:48,481 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4566876866910056 [2023-11-06 23:03:48,481 INFO L72 ComplementDD]: Start complementDD. Operand 46 states and 2752 transitions. [2023-11-06 23:03:48,481 INFO L73 IsDeterministic]: Start isDeterministic. Operand 46 states and 2752 transitions. [2023-11-06 23:03:48,483 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 23:03:48,483 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 46 states and 2752 transitions. [2023-11-06 23:03:48,498 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 47 states, 46 states have (on average 59.82608695652174) internal successors, (2752), 46 states have internal predecessors, (2752), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 23:03:48,516 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 47 states, 47 states have (on average 131.0) internal successors, (6157), 47 states have internal predecessors, (6157), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 23:03:48,519 INFO L81 ComplementDD]: Finished complementDD. Result has 47 states, 47 states have (on average 131.0) internal successors, (6157), 47 states have internal predecessors, (6157), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 23:03:48,519 INFO L175 Difference]: Start difference. First operand has 254 places, 301 transitions, 4773 flow. Second operand 46 states and 2752 transitions. [2023-11-06 23:03:48,519 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 299 places, 543 transitions, 10343 flow [2023-11-06 23:03:49,283 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 285 places, 543 transitions, 9468 flow, removed 412 selfloop flow, removed 14 redundant places. [2023-11-06 23:03:49,293 INFO L231 Difference]: Finished difference. Result has 305 places, 370 transitions, 6462 flow [2023-11-06 23:03:49,294 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=131, PETRI_DIFFERENCE_MINUEND_FLOW=3898, PETRI_DIFFERENCE_MINUEND_PLACES=240, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=301, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=123, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=161, PETRI_DIFFERENCE_SUBTRAHEND_STATES=46, PETRI_FLOW=6462, PETRI_PLACES=305, PETRI_TRANSITIONS=370} [2023-11-06 23:03:49,294 INFO L281 CegarLoopForPetriNet]: 18 programPoint places, 287 predicate places. [2023-11-06 23:03:49,295 INFO L495 AbstractCegarLoop]: Abstraction has has 305 places, 370 transitions, 6462 flow [2023-11-06 23:03:49,295 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 41 states, 41 states have (on average 56.31707317073171) internal successors, (2309), 41 states have internal predecessors, (2309), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 23:03:49,296 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 23:03:49,296 INFO L208 CegarLoopForPetriNet]: trace histogram [10, 8, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 23:03:49,302 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0dcf83f7-8b7f-4f8b-857f-2b32dfddd8be/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2023-11-06 23:03:49,501 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12,8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0dcf83f7-8b7f-4f8b-857f-2b32dfddd8be/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 23:03:49,501 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-06 23:03:49,502 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 23:03:49,502 INFO L85 PathProgramCache]: Analyzing trace with hash 1105462529, now seen corresponding path program 11 times [2023-11-06 23:03:49,502 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 23:03:49,502 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1645277983] [2023-11-06 23:03:49,502 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 23:03:49,502 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 23:03:49,518 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 23:03:50,089 INFO L134 CoverageAnalysis]: Checked inductivity of 73 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-06 23:03:50,089 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 23:03:50,089 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1645277983] [2023-11-06 23:03:50,089 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1645277983] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-06 23:03:50,090 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1964035019] [2023-11-06 23:03:50,090 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-11-06 23:03:50,090 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 23:03:50,090 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0dcf83f7-8b7f-4f8b-857f-2b32dfddd8be/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 23:03:50,095 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0dcf83f7-8b7f-4f8b-857f-2b32dfddd8be/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 23:03:50,104 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0dcf83f7-8b7f-4f8b-857f-2b32dfddd8be/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2023-11-06 23:03:50,200 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 10 check-sat command(s) [2023-11-06 23:03:50,200 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-06 23:03:50,202 INFO L262 TraceCheckSpWp]: Trace formula consists of 194 conjuncts, 23 conjunts are in the unsatisfiable core [2023-11-06 23:03:50,205 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 23:03:50,291 INFO L134 CoverageAnalysis]: Checked inductivity of 73 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-06 23:03:50,291 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 23:03:50,874 INFO L134 CoverageAnalysis]: Checked inductivity of 73 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-06 23:03:50,875 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1964035019] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-06 23:03:50,875 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-06 23:03:50,875 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19, 19] total 38 [2023-11-06 23:03:50,876 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [119128731] [2023-11-06 23:03:50,876 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-06 23:03:50,876 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 40 states [2023-11-06 23:03:50,877 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 23:03:50,878 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2023-11-06 23:03:50,879 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=317, Invalid=1243, Unknown=0, NotChecked=0, Total=1560 [2023-11-06 23:03:51,066 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 55 out of 131 [2023-11-06 23:03:51,069 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 305 places, 370 transitions, 6462 flow. Second operand has 40 states, 40 states have (on average 56.3) internal successors, (2252), 40 states have internal predecessors, (2252), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 23:03:51,070 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 23:03:51,070 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 55 of 131 [2023-11-06 23:03:51,070 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 23:03:53,943 INFO L124 PetriNetUnfolderBase]: 1944/3643 cut-off events. [2023-11-06 23:03:53,943 INFO L125 PetriNetUnfolderBase]: For 732245/732245 co-relation queries the response was YES. [2023-11-06 23:03:54,029 INFO L83 FinitePrefix]: Finished finitePrefix Result has 41381 conditions, 3643 events. 1944/3643 cut-off events. For 732245/732245 co-relation queries the response was YES. Maximal size of possible extension queue 114. Compared 20532 event pairs, 112 based on Foata normal form. 80/3723 useless extension candidates. Maximal degree in co-relation 41246. Up to 1070 conditions per place. [2023-11-06 23:03:54,073 INFO L140 encePairwiseOnDemand]: 126/131 looper letters, 201 selfloop transitions, 413 changer transitions 97/711 dead transitions. [2023-11-06 23:03:54,073 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 355 places, 711 transitions, 15174 flow [2023-11-06 23:03:54,074 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2023-11-06 23:03:54,074 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 51 states. [2023-11-06 23:03:54,090 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 3051 transitions. [2023-11-06 23:03:54,095 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4566681634485855 [2023-11-06 23:03:54,095 INFO L72 ComplementDD]: Start complementDD. Operand 51 states and 3051 transitions. [2023-11-06 23:03:54,095 INFO L73 IsDeterministic]: Start isDeterministic. Operand 51 states and 3051 transitions. [2023-11-06 23:03:54,099 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 23:03:54,100 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 51 states and 3051 transitions. [2023-11-06 23:03:54,112 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 52 states, 51 states have (on average 59.8235294117647) internal successors, (3051), 51 states have internal predecessors, (3051), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 23:03:54,128 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 52 states, 52 states have (on average 131.0) internal successors, (6812), 52 states have internal predecessors, (6812), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 23:03:54,131 INFO L81 ComplementDD]: Finished complementDD. Result has 52 states, 52 states have (on average 131.0) internal successors, (6812), 52 states have internal predecessors, (6812), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 23:03:54,131 INFO L175 Difference]: Start difference. First operand has 305 places, 370 transitions, 6462 flow. Second operand 51 states and 3051 transitions. [2023-11-06 23:03:54,131 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 355 places, 711 transitions, 15174 flow [2023-11-06 23:03:55,698 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 341 places, 711 transitions, 13494 flow, removed 801 selfloop flow, removed 14 redundant places. [2023-11-06 23:03:55,713 INFO L231 Difference]: Finished difference. Result has 367 places, 514 transitions, 10027 flow [2023-11-06 23:03:55,714 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=131, PETRI_DIFFERENCE_MINUEND_FLOW=5168, PETRI_DIFFERENCE_MINUEND_PLACES=291, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=370, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=287, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=67, PETRI_DIFFERENCE_SUBTRAHEND_STATES=51, PETRI_FLOW=10027, PETRI_PLACES=367, PETRI_TRANSITIONS=514} [2023-11-06 23:03:55,714 INFO L281 CegarLoopForPetriNet]: 18 programPoint places, 349 predicate places. [2023-11-06 23:03:55,714 INFO L495 AbstractCegarLoop]: Abstraction has has 367 places, 514 transitions, 10027 flow [2023-11-06 23:03:55,715 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 40 states, 40 states have (on average 56.3) internal successors, (2252), 40 states have internal predecessors, (2252), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 23:03:55,715 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 23:03:55,716 INFO L208 CegarLoopForPetriNet]: trace histogram [10, 8, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 23:03:55,723 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0dcf83f7-8b7f-4f8b-857f-2b32dfddd8be/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2023-11-06 23:03:55,921 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0dcf83f7-8b7f-4f8b-857f-2b32dfddd8be/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2023-11-06 23:03:55,921 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-06 23:03:55,922 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 23:03:55,923 INFO L85 PathProgramCache]: Analyzing trace with hash 1113955151, now seen corresponding path program 12 times [2023-11-06 23:03:55,923 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 23:03:55,923 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [892568501] [2023-11-06 23:03:55,923 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 23:03:55,923 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 23:03:55,940 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 23:03:56,313 INFO L134 CoverageAnalysis]: Checked inductivity of 73 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-06 23:03:56,313 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 23:03:56,314 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [892568501] [2023-11-06 23:03:56,314 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [892568501] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-06 23:03:56,314 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1554654985] [2023-11-06 23:03:56,314 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-11-06 23:03:56,314 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 23:03:56,314 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0dcf83f7-8b7f-4f8b-857f-2b32dfddd8be/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 23:03:56,315 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0dcf83f7-8b7f-4f8b-857f-2b32dfddd8be/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 23:03:56,338 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0dcf83f7-8b7f-4f8b-857f-2b32dfddd8be/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2023-11-06 23:03:56,433 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 10 check-sat command(s) [2023-11-06 23:03:56,433 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-06 23:03:56,435 INFO L262 TraceCheckSpWp]: Trace formula consists of 194 conjuncts, 23 conjunts are in the unsatisfiable core [2023-11-06 23:03:56,437 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 23:03:56,494 INFO L134 CoverageAnalysis]: Checked inductivity of 73 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-06 23:03:56,494 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 23:03:56,981 INFO L134 CoverageAnalysis]: Checked inductivity of 73 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-06 23:03:56,981 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1554654985] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-06 23:03:56,981 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-06 23:03:56,982 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19, 19] total 38 [2023-11-06 23:03:56,982 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [276739371] [2023-11-06 23:03:56,982 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-06 23:03:56,982 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 40 states [2023-11-06 23:03:56,983 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 23:03:56,984 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2023-11-06 23:03:56,984 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=290, Invalid=1270, Unknown=0, NotChecked=0, Total=1560 [2023-11-06 23:03:57,105 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 55 out of 131 [2023-11-06 23:03:57,108 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 367 places, 514 transitions, 10027 flow. Second operand has 40 states, 40 states have (on average 56.3) internal successors, (2252), 40 states have internal predecessors, (2252), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 23:03:57,108 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 23:03:57,108 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 55 of 131 [2023-11-06 23:03:57,108 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 23:04:01,001 INFO L124 PetriNetUnfolderBase]: 2604/4839 cut-off events. [2023-11-06 23:04:01,002 INFO L125 PetriNetUnfolderBase]: For 1427207/1427207 co-relation queries the response was YES. [2023-11-06 23:04:01,048 INFO L83 FinitePrefix]: Finished finitePrefix Result has 65636 conditions, 4839 events. 2604/4839 cut-off events. For 1427207/1427207 co-relation queries the response was YES. Maximal size of possible extension queue 140. Compared 28651 event pairs, 40 based on Foata normal form. 80/4919 useless extension candidates. Maximal degree in co-relation 65474. Up to 1438 conditions per place. [2023-11-06 23:04:01,164 INFO L140 encePairwiseOnDemand]: 126/131 looper letters, 172 selfloop transitions, 629 changer transitions 101/902 dead transitions. [2023-11-06 23:04:01,164 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 429 places, 902 transitions, 22394 flow [2023-11-06 23:04:01,165 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 63 states. [2023-11-06 23:04:01,165 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 63 states. [2023-11-06 23:04:01,170 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 3772 transitions. [2023-11-06 23:04:01,171 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4570459226947777 [2023-11-06 23:04:01,172 INFO L72 ComplementDD]: Start complementDD. Operand 63 states and 3772 transitions. [2023-11-06 23:04:01,172 INFO L73 IsDeterministic]: Start isDeterministic. Operand 63 states and 3772 transitions. [2023-11-06 23:04:01,174 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 23:04:01,174 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 63 states and 3772 transitions. [2023-11-06 23:04:01,192 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 64 states, 63 states have (on average 59.87301587301587) internal successors, (3772), 63 states have internal predecessors, (3772), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 23:04:01,203 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 64 states, 64 states have (on average 131.0) internal successors, (8384), 64 states have internal predecessors, (8384), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 23:04:01,205 INFO L81 ComplementDD]: Finished complementDD. Result has 64 states, 64 states have (on average 131.0) internal successors, (8384), 64 states have internal predecessors, (8384), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 23:04:01,205 INFO L175 Difference]: Start difference. First operand has 367 places, 514 transitions, 10027 flow. Second operand 63 states and 3772 transitions. [2023-11-06 23:04:01,206 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 429 places, 902 transitions, 22394 flow [2023-11-06 23:04:04,779 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 415 places, 902 transitions, 18124 flow, removed 2077 selfloop flow, removed 14 redundant places. [2023-11-06 23:04:04,796 INFO L231 Difference]: Finished difference. Result has 448 places, 676 transitions, 13813 flow [2023-11-06 23:04:04,797 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=131, PETRI_DIFFERENCE_MINUEND_FLOW=7855, PETRI_DIFFERENCE_MINUEND_PLACES=353, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=514, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=471, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=35, PETRI_DIFFERENCE_SUBTRAHEND_STATES=63, PETRI_FLOW=13813, PETRI_PLACES=448, PETRI_TRANSITIONS=676} [2023-11-06 23:04:04,797 INFO L281 CegarLoopForPetriNet]: 18 programPoint places, 430 predicate places. [2023-11-06 23:04:04,798 INFO L495 AbstractCegarLoop]: Abstraction has has 448 places, 676 transitions, 13813 flow [2023-11-06 23:04:04,798 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 40 states, 40 states have (on average 56.3) internal successors, (2252), 40 states have internal predecessors, (2252), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 23:04:04,798 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 23:04:04,799 INFO L208 CegarLoopForPetriNet]: trace histogram [10, 9, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 23:04:04,805 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0dcf83f7-8b7f-4f8b-857f-2b32dfddd8be/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2023-11-06 23:04:05,004 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0dcf83f7-8b7f-4f8b-857f-2b32dfddd8be/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2023-11-06 23:04:05,005 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-06 23:04:05,005 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 23:04:05,005 INFO L85 PathProgramCache]: Analyzing trace with hash -1393981061, now seen corresponding path program 13 times [2023-11-06 23:04:05,005 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 23:04:05,005 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [86301719] [2023-11-06 23:04:05,005 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 23:04:05,006 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 23:04:05,053 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 23:04:05,453 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 80 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-06 23:04:05,453 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 23:04:05,453 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [86301719] [2023-11-06 23:04:05,454 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [86301719] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-06 23:04:05,454 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [115839767] [2023-11-06 23:04:05,454 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-11-06 23:04:05,454 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 23:04:05,454 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0dcf83f7-8b7f-4f8b-857f-2b32dfddd8be/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 23:04:05,455 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0dcf83f7-8b7f-4f8b-857f-2b32dfddd8be/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 23:04:05,472 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0dcf83f7-8b7f-4f8b-857f-2b32dfddd8be/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2023-11-06 23:04:05,566 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 23:04:05,568 INFO L262 TraceCheckSpWp]: Trace formula consists of 199 conjuncts, 24 conjunts are in the unsatisfiable core [2023-11-06 23:04:05,570 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 23:04:05,631 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 80 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-06 23:04:05,632 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 23:04:06,121 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 80 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-06 23:04:06,122 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [115839767] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-06 23:04:06,122 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-06 23:04:06,122 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20, 20] total 41 [2023-11-06 23:04:06,122 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1104638971] [2023-11-06 23:04:06,122 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-06 23:04:06,122 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 43 states [2023-11-06 23:04:06,123 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 23:04:06,123 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2023-11-06 23:04:06,124 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=430, Invalid=1376, Unknown=0, NotChecked=0, Total=1806 [2023-11-06 23:04:06,235 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 55 out of 131 [2023-11-06 23:04:06,237 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 448 places, 676 transitions, 13813 flow. Second operand has 43 states, 43 states have (on average 56.30232558139535) internal successors, (2421), 43 states have internal predecessors, (2421), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 23:04:06,237 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 23:04:06,238 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 55 of 131 [2023-11-06 23:04:06,238 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 23:04:11,857 INFO L124 PetriNetUnfolderBase]: 3012/5583 cut-off events. [2023-11-06 23:04:11,858 INFO L125 PetriNetUnfolderBase]: For 1865885/1865885 co-relation queries the response was YES. [2023-11-06 23:04:11,910 INFO L83 FinitePrefix]: Finished finitePrefix Result has 86026 conditions, 5583 events. 3012/5583 cut-off events. For 1865885/1865885 co-relation queries the response was YES. Maximal size of possible extension queue 140. Compared 32854 event pairs, 12 based on Foata normal form. 84/5667 useless extension candidates. Maximal degree in co-relation 85832. Up to 1766 conditions per place. [2023-11-06 23:04:11,946 INFO L140 encePairwiseOnDemand]: 126/131 looper letters, 130 selfloop transitions, 740 changer transitions 148/1018 dead transitions. [2023-11-06 23:04:11,946 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 524 places, 1018 transitions, 31561 flow [2023-11-06 23:04:11,946 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 77 states. [2023-11-06 23:04:11,947 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 77 states. [2023-11-06 23:04:11,954 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 77 states to 77 states and 4612 transitions. [2023-11-06 23:04:11,957 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45722216714583125 [2023-11-06 23:04:11,957 INFO L72 ComplementDD]: Start complementDD. Operand 77 states and 4612 transitions. [2023-11-06 23:04:11,957 INFO L73 IsDeterministic]: Start isDeterministic. Operand 77 states and 4612 transitions. [2023-11-06 23:04:11,960 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 23:04:11,960 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 77 states and 4612 transitions. [2023-11-06 23:04:11,968 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 78 states, 77 states have (on average 59.896103896103895) internal successors, (4612), 77 states have internal predecessors, (4612), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 23:04:11,984 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 78 states, 78 states have (on average 131.0) internal successors, (10218), 78 states have internal predecessors, (10218), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 23:04:11,987 INFO L81 ComplementDD]: Finished complementDD. Result has 78 states, 78 states have (on average 131.0) internal successors, (10218), 78 states have internal predecessors, (10218), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 23:04:11,987 INFO L175 Difference]: Start difference. First operand has 448 places, 676 transitions, 13813 flow. Second operand 77 states and 4612 transitions. [2023-11-06 23:04:11,987 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 524 places, 1018 transitions, 31561 flow [2023-11-06 23:04:16,736 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 506 places, 1018 transitions, 25294 flow, removed 3025 selfloop flow, removed 18 redundant places. [2023-11-06 23:04:16,758 INFO L231 Difference]: Finished difference. Result has 544 places, 789 transitions, 18102 flow [2023-11-06 23:04:16,758 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=131, PETRI_DIFFERENCE_MINUEND_FLOW=10896, PETRI_DIFFERENCE_MINUEND_PLACES=430, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=676, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=628, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=46, PETRI_DIFFERENCE_SUBTRAHEND_STATES=77, PETRI_FLOW=18102, PETRI_PLACES=544, PETRI_TRANSITIONS=789} [2023-11-06 23:04:16,759 INFO L281 CegarLoopForPetriNet]: 18 programPoint places, 526 predicate places. [2023-11-06 23:04:16,759 INFO L495 AbstractCegarLoop]: Abstraction has has 544 places, 789 transitions, 18102 flow [2023-11-06 23:04:16,759 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 43 states, 43 states have (on average 56.30232558139535) internal successors, (2421), 43 states have internal predecessors, (2421), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 23:04:16,759 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 23:04:16,760 INFO L208 CegarLoopForPetriNet]: trace histogram [18, 18, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 23:04:16,766 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0dcf83f7-8b7f-4f8b-857f-2b32dfddd8be/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2023-11-06 23:04:16,965 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0dcf83f7-8b7f-4f8b-857f-2b32dfddd8be/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2023-11-06 23:04:16,965 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-06 23:04:16,965 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 23:04:16,966 INFO L85 PathProgramCache]: Analyzing trace with hash -1397016811, now seen corresponding path program 14 times [2023-11-06 23:04:16,966 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 23:04:16,966 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [330388732] [2023-11-06 23:04:16,966 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 23:04:16,966 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 23:04:17,002 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 23:04:17,943 INFO L134 CoverageAnalysis]: Checked inductivity of 306 backedges. 0 proven. 306 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 23:04:17,943 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 23:04:17,943 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [330388732] [2023-11-06 23:04:17,943 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [330388732] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-06 23:04:17,943 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1670307897] [2023-11-06 23:04:17,943 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-06 23:04:17,944 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 23:04:17,944 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0dcf83f7-8b7f-4f8b-857f-2b32dfddd8be/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 23:04:17,945 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0dcf83f7-8b7f-4f8b-857f-2b32dfddd8be/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 23:04:17,947 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0dcf83f7-8b7f-4f8b-857f-2b32dfddd8be/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2023-11-06 23:04:18,058 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-11-06 23:04:18,058 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-06 23:04:18,060 INFO L262 TraceCheckSpWp]: Trace formula consists of 284 conjuncts, 42 conjunts are in the unsatisfiable core [2023-11-06 23:04:18,070 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 23:04:18,204 INFO L134 CoverageAnalysis]: Checked inductivity of 306 backedges. 0 proven. 306 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 23:04:18,205 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 23:04:19,154 INFO L134 CoverageAnalysis]: Checked inductivity of 306 backedges. 0 proven. 306 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 23:04:19,155 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1670307897] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-06 23:04:19,155 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-06 23:04:19,155 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [38, 38, 38] total 76 [2023-11-06 23:04:19,155 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [344523944] [2023-11-06 23:04:19,155 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-06 23:04:19,156 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 78 states [2023-11-06 23:04:19,157 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 23:04:19,158 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 78 interpolants. [2023-11-06 23:04:19,161 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1428, Invalid=4578, Unknown=0, NotChecked=0, Total=6006 [2023-11-06 23:04:19,318 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 55 out of 131 [2023-11-06 23:04:19,322 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 544 places, 789 transitions, 18102 flow. Second operand has 78 states, 78 states have (on average 56.14102564102564) internal successors, (4379), 78 states have internal predecessors, (4379), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 23:04:19,322 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 23:04:19,322 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 55 of 131 [2023-11-06 23:04:19,323 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 23:04:26,908 INFO L124 PetriNetUnfolderBase]: 3268/6011 cut-off events. [2023-11-06 23:04:26,908 INFO L125 PetriNetUnfolderBase]: For 2802132/2802132 co-relation queries the response was YES. [2023-11-06 23:04:26,979 INFO L83 FinitePrefix]: Finished finitePrefix Result has 109420 conditions, 6011 events. 3268/6011 cut-off events. For 2802132/2802132 co-relation queries the response was YES. Maximal size of possible extension queue 141. Compared 34939 event pairs, 18 based on Foata normal form. 28/6039 useless extension candidates. Maximal degree in co-relation 109189. Up to 1930 conditions per place. [2023-11-06 23:04:27,025 INFO L140 encePairwiseOnDemand]: 126/131 looper letters, 167 selfloop transitions, 804 changer transitions 170/1141 dead transitions. [2023-11-06 23:04:27,025 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 631 places, 1141 transitions, 37228 flow [2023-11-06 23:04:27,031 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 88 states. [2023-11-06 23:04:27,031 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 88 states. [2023-11-06 23:04:27,039 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 88 states to 88 states and 5254 transitions. [2023-11-06 23:04:27,042 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45575988896599584 [2023-11-06 23:04:27,042 INFO L72 ComplementDD]: Start complementDD. Operand 88 states and 5254 transitions. [2023-11-06 23:04:27,042 INFO L73 IsDeterministic]: Start isDeterministic. Operand 88 states and 5254 transitions. [2023-11-06 23:04:27,045 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 23:04:27,045 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 88 states and 5254 transitions. [2023-11-06 23:04:27,057 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 89 states, 88 states have (on average 59.70454545454545) internal successors, (5254), 88 states have internal predecessors, (5254), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 23:04:27,072 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 89 states, 89 states have (on average 131.0) internal successors, (11659), 89 states have internal predecessors, (11659), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 23:04:27,074 INFO L81 ComplementDD]: Finished complementDD. Result has 89 states, 89 states have (on average 131.0) internal successors, (11659), 89 states have internal predecessors, (11659), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 23:04:27,074 INFO L175 Difference]: Start difference. First operand has 544 places, 789 transitions, 18102 flow. Second operand 88 states and 5254 transitions. [2023-11-06 23:04:27,074 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 631 places, 1141 transitions, 37228 flow [2023-11-06 23:04:35,817 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 613 places, 1141 transitions, 29400 flow, removed 3761 selfloop flow, removed 18 redundant places. [2023-11-06 23:04:35,839 INFO L231 Difference]: Finished difference. Result has 627 places, 853 transitions, 17984 flow [2023-11-06 23:04:35,840 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=131, PETRI_DIFFERENCE_MINUEND_FLOW=13626, PETRI_DIFFERENCE_MINUEND_PLACES=526, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=789, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=741, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=46, PETRI_DIFFERENCE_SUBTRAHEND_STATES=88, PETRI_FLOW=17984, PETRI_PLACES=627, PETRI_TRANSITIONS=853} [2023-11-06 23:04:35,840 INFO L281 CegarLoopForPetriNet]: 18 programPoint places, 609 predicate places. [2023-11-06 23:04:35,840 INFO L495 AbstractCegarLoop]: Abstraction has has 627 places, 853 transitions, 17984 flow [2023-11-06 23:04:35,841 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 78 states, 78 states have (on average 56.14102564102564) internal successors, (4379), 78 states have internal predecessors, (4379), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 23:04:35,841 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 23:04:35,841 INFO L208 CegarLoopForPetriNet]: trace histogram [20, 20, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 23:04:35,846 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0dcf83f7-8b7f-4f8b-857f-2b32dfddd8be/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2023-11-06 23:04:36,041 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0dcf83f7-8b7f-4f8b-857f-2b32dfddd8be/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2023-11-06 23:04:36,042 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-06 23:04:36,042 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 23:04:36,042 INFO L85 PathProgramCache]: Analyzing trace with hash -1655893737, now seen corresponding path program 15 times [2023-11-06 23:04:36,042 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 23:04:36,042 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1917905451] [2023-11-06 23:04:36,042 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 23:04:36,043 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 23:04:36,073 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 23:04:37,400 INFO L134 CoverageAnalysis]: Checked inductivity of 380 backedges. 0 proven. 380 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 23:04:37,401 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 23:04:37,401 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1917905451] [2023-11-06 23:04:37,401 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1917905451] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-06 23:04:37,401 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [578663255] [2023-11-06 23:04:37,401 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-11-06 23:04:37,401 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 23:04:37,401 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0dcf83f7-8b7f-4f8b-857f-2b32dfddd8be/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 23:04:37,402 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0dcf83f7-8b7f-4f8b-857f-2b32dfddd8be/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 23:04:37,404 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0dcf83f7-8b7f-4f8b-857f-2b32dfddd8be/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2023-11-06 23:04:37,561 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 20 check-sat command(s) [2023-11-06 23:04:37,561 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-06 23:04:37,564 INFO L262 TraceCheckSpWp]: Trace formula consists of 304 conjuncts, 46 conjunts are in the unsatisfiable core [2023-11-06 23:04:37,567 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 23:04:37,731 INFO L134 CoverageAnalysis]: Checked inductivity of 380 backedges. 0 proven. 380 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 23:04:37,731 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 23:04:38,024 INFO L134 CoverageAnalysis]: Checked inductivity of 380 backedges. 0 proven. 380 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 23:04:38,024 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [578663255] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-06 23:04:38,024 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-06 23:04:38,024 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [42, 42, 42] total 42 [2023-11-06 23:04:38,025 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1305792115] [2023-11-06 23:04:38,025 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-06 23:04:38,025 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 44 states [2023-11-06 23:04:38,026 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 23:04:38,026 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2023-11-06 23:04:38,027 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=466, Invalid=1426, Unknown=0, NotChecked=0, Total=1892 [2023-11-06 23:04:38,145 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 55 out of 131 [2023-11-06 23:04:38,147 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 627 places, 853 transitions, 17984 flow. Second operand has 44 states, 44 states have (on average 56.09090909090909) internal successors, (2468), 44 states have internal predecessors, (2468), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 23:04:38,147 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 23:04:38,147 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 55 of 131 [2023-11-06 23:04:38,147 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 23:04:44,061 INFO L124 PetriNetUnfolderBase]: 3316/6107 cut-off events. [2023-11-06 23:04:44,062 INFO L125 PetriNetUnfolderBase]: For 3102285/3102285 co-relation queries the response was YES. [2023-11-06 23:04:44,126 INFO L83 FinitePrefix]: Finished finitePrefix Result has 110766 conditions, 6107 events. 3316/6107 cut-off events. For 3102285/3102285 co-relation queries the response was YES. Maximal size of possible extension queue 140. Compared 36096 event pairs, 1186 based on Foata normal form. 8/6115 useless extension candidates. Maximal degree in co-relation 110520. Up to 4857 conditions per place. [2023-11-06 23:04:44,162 INFO L140 encePairwiseOnDemand]: 126/131 looper letters, 767 selfloop transitions, 153 changer transitions 87/1007 dead transitions. [2023-11-06 23:04:44,162 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 672 places, 1007 transitions, 27236 flow [2023-11-06 23:04:44,171 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2023-11-06 23:04:44,171 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 46 states. [2023-11-06 23:04:44,174 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 2727 transitions. [2023-11-06 23:04:44,175 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45253899767673417 [2023-11-06 23:04:44,175 INFO L72 ComplementDD]: Start complementDD. Operand 46 states and 2727 transitions. [2023-11-06 23:04:44,175 INFO L73 IsDeterministic]: Start isDeterministic. Operand 46 states and 2727 transitions. [2023-11-06 23:04:44,176 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 23:04:44,177 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 46 states and 2727 transitions. [2023-11-06 23:04:44,181 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 47 states, 46 states have (on average 59.28260869565217) internal successors, (2727), 46 states have internal predecessors, (2727), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 23:04:44,186 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 47 states, 47 states have (on average 131.0) internal successors, (6157), 47 states have internal predecessors, (6157), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 23:04:44,187 INFO L81 ComplementDD]: Finished complementDD. Result has 47 states, 47 states have (on average 131.0) internal successors, (6157), 47 states have internal predecessors, (6157), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 23:04:44,187 INFO L175 Difference]: Start difference. First operand has 627 places, 853 transitions, 17984 flow. Second operand 46 states and 2727 transitions. [2023-11-06 23:04:44,187 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 672 places, 1007 transitions, 27236 flow [2023-11-06 23:04:52,992 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 638 places, 1007 transitions, 23618 flow, removed 1494 selfloop flow, removed 34 redundant places. [2023-11-06 23:04:53,013 INFO L231 Difference]: Finished difference. Result has 646 places, 865 transitions, 16030 flow [2023-11-06 23:04:53,015 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=131, PETRI_DIFFERENCE_MINUEND_FLOW=15222, PETRI_DIFFERENCE_MINUEND_PLACES=593, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=853, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=141, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=700, PETRI_DIFFERENCE_SUBTRAHEND_STATES=46, PETRI_FLOW=16030, PETRI_PLACES=646, PETRI_TRANSITIONS=865} [2023-11-06 23:04:53,015 INFO L281 CegarLoopForPetriNet]: 18 programPoint places, 628 predicate places. [2023-11-06 23:04:53,016 INFO L495 AbstractCegarLoop]: Abstraction has has 646 places, 865 transitions, 16030 flow [2023-11-06 23:04:53,016 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 44 states, 44 states have (on average 56.09090909090909) internal successors, (2468), 44 states have internal predecessors, (2468), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 23:04:53,016 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 23:04:53,016 INFO L208 CegarLoopForPetriNet]: trace histogram [20, 20, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 23:04:53,023 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0dcf83f7-8b7f-4f8b-857f-2b32dfddd8be/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2023-11-06 23:04:53,222 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0dcf83f7-8b7f-4f8b-857f-2b32dfddd8be/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2023-11-06 23:04:53,222 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-06 23:04:53,222 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 23:04:53,222 INFO L85 PathProgramCache]: Analyzing trace with hash 925769881, now seen corresponding path program 16 times [2023-11-06 23:04:53,222 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 23:04:53,223 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1511704281] [2023-11-06 23:04:53,223 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 23:04:53,223 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 23:04:53,254 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 23:04:54,663 INFO L134 CoverageAnalysis]: Checked inductivity of 380 backedges. 0 proven. 380 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 23:04:54,663 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 23:04:54,663 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1511704281] [2023-11-06 23:04:54,664 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1511704281] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-06 23:04:54,664 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [941028409] [2023-11-06 23:04:54,664 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-11-06 23:04:54,664 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 23:04:54,664 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0dcf83f7-8b7f-4f8b-857f-2b32dfddd8be/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 23:04:54,667 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0dcf83f7-8b7f-4f8b-857f-2b32dfddd8be/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 23:04:54,706 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0dcf83f7-8b7f-4f8b-857f-2b32dfddd8be/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2023-11-06 23:04:54,817 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-11-06 23:04:54,817 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-06 23:04:54,820 INFO L262 TraceCheckSpWp]: Trace formula consists of 304 conjuncts, 46 conjunts are in the unsatisfiable core [2023-11-06 23:04:54,824 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 23:04:55,060 INFO L134 CoverageAnalysis]: Checked inductivity of 380 backedges. 0 proven. 380 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 23:04:55,060 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 23:04:55,380 INFO L134 CoverageAnalysis]: Checked inductivity of 380 backedges. 0 proven. 380 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 23:04:55,380 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [941028409] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-06 23:04:55,380 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-06 23:04:55,380 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [42, 42, 42] total 43 [2023-11-06 23:04:55,381 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2092824834] [2023-11-06 23:04:55,381 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-06 23:04:55,381 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 45 states [2023-11-06 23:04:55,382 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 23:04:55,382 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 45 interpolants. [2023-11-06 23:04:55,384 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=450, Invalid=1530, Unknown=0, NotChecked=0, Total=1980 [2023-11-06 23:04:55,557 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 55 out of 131 [2023-11-06 23:04:55,559 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 646 places, 865 transitions, 16030 flow. Second operand has 45 states, 45 states have (on average 56.111111111111114) internal successors, (2525), 45 states have internal predecessors, (2525), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 23:04:55,559 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 23:04:55,559 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 55 of 131 [2023-11-06 23:04:55,559 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 23:05:02,997 INFO L124 PetriNetUnfolderBase]: 3584/6643 cut-off events. [2023-11-06 23:05:02,997 INFO L125 PetriNetUnfolderBase]: For 3504797/3504797 co-relation queries the response was YES. [2023-11-06 23:05:03,268 INFO L83 FinitePrefix]: Finished finitePrefix Result has 119059 conditions, 6643 events. 3584/6643 cut-off events. For 3504797/3504797 co-relation queries the response was YES. Maximal size of possible extension queue 148. Compared 40126 event pairs, 1054 based on Foata normal form. 8/6651 useless extension candidates. Maximal degree in co-relation 118804. Up to 4397 conditions per place. [2023-11-06 23:05:03,319 INFO L140 encePairwiseOnDemand]: 126/131 looper letters, 711 selfloop transitions, 283 changer transitions 93/1087 dead transitions. [2023-11-06 23:05:03,319 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 694 places, 1087 transitions, 26157 flow [2023-11-06 23:05:03,319 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2023-11-06 23:05:03,319 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 49 states. [2023-11-06 23:05:03,323 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 2909 transitions. [2023-11-06 23:05:03,324 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4531858544944695 [2023-11-06 23:05:03,324 INFO L72 ComplementDD]: Start complementDD. Operand 49 states and 2909 transitions. [2023-11-06 23:05:03,324 INFO L73 IsDeterministic]: Start isDeterministic. Operand 49 states and 2909 transitions. [2023-11-06 23:05:03,325 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 23:05:03,325 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 49 states and 2909 transitions. [2023-11-06 23:05:03,331 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 50 states, 49 states have (on average 59.36734693877551) internal successors, (2909), 49 states have internal predecessors, (2909), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 23:05:03,338 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 50 states, 50 states have (on average 131.0) internal successors, (6550), 50 states have internal predecessors, (6550), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 23:05:03,339 INFO L81 ComplementDD]: Finished complementDD. Result has 50 states, 50 states have (on average 131.0) internal successors, (6550), 50 states have internal predecessors, (6550), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 23:05:03,339 INFO L175 Difference]: Start difference. First operand has 646 places, 865 transitions, 16030 flow. Second operand 49 states and 2909 transitions. [2023-11-06 23:05:03,340 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 694 places, 1087 transitions, 26157 flow [2023-11-06 23:05:12,787 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 687 places, 1087 transitions, 25788 flow, removed 162 selfloop flow, removed 7 redundant places. [2023-11-06 23:05:12,836 INFO L231 Difference]: Finished difference. Result has 726 places, 934 transitions, 18598 flow [2023-11-06 23:05:12,837 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=131, PETRI_DIFFERENCE_MINUEND_FLOW=15661, PETRI_DIFFERENCE_MINUEND_PLACES=639, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=865, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=214, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=584, PETRI_DIFFERENCE_SUBTRAHEND_STATES=49, PETRI_FLOW=18598, PETRI_PLACES=726, PETRI_TRANSITIONS=934} [2023-11-06 23:05:12,838 INFO L281 CegarLoopForPetriNet]: 18 programPoint places, 708 predicate places. [2023-11-06 23:05:12,838 INFO L495 AbstractCegarLoop]: Abstraction has has 726 places, 934 transitions, 18598 flow [2023-11-06 23:05:12,839 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 45 states, 45 states have (on average 56.111111111111114) internal successors, (2525), 45 states have internal predecessors, (2525), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 23:05:12,839 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 23:05:12,839 INFO L208 CegarLoopForPetriNet]: trace histogram [20, 20, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 23:05:12,844 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0dcf83f7-8b7f-4f8b-857f-2b32dfddd8be/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Ended with exit code 0 [2023-11-06 23:05:13,039 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0dcf83f7-8b7f-4f8b-857f-2b32dfddd8be/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 23:05:13,040 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-06 23:05:13,040 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 23:05:13,040 INFO L85 PathProgramCache]: Analyzing trace with hash 1750004491, now seen corresponding path program 17 times [2023-11-06 23:05:13,040 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 23:05:13,040 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1206271175] [2023-11-06 23:05:13,040 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 23:05:13,040 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 23:05:13,073 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 23:05:14,284 INFO L134 CoverageAnalysis]: Checked inductivity of 380 backedges. 0 proven. 380 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 23:05:14,285 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 23:05:14,285 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1206271175] [2023-11-06 23:05:14,285 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1206271175] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-06 23:05:14,285 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [297509230] [2023-11-06 23:05:14,285 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-11-06 23:05:14,285 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 23:05:14,286 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0dcf83f7-8b7f-4f8b-857f-2b32dfddd8be/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 23:05:14,289 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0dcf83f7-8b7f-4f8b-857f-2b32dfddd8be/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 23:05:14,292 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0dcf83f7-8b7f-4f8b-857f-2b32dfddd8be/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2023-11-06 23:05:14,405 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 20 check-sat command(s) [2023-11-06 23:05:14,406 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-06 23:05:14,408 INFO L262 TraceCheckSpWp]: Trace formula consists of 304 conjuncts, 46 conjunts are in the unsatisfiable core [2023-11-06 23:05:14,411 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 23:05:14,570 INFO L134 CoverageAnalysis]: Checked inductivity of 380 backedges. 0 proven. 380 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 23:05:14,570 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 23:05:14,832 INFO L134 CoverageAnalysis]: Checked inductivity of 380 backedges. 0 proven. 380 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 23:05:14,833 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [297509230] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-06 23:05:14,833 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-06 23:05:14,833 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [42, 42, 42] total 42 [2023-11-06 23:05:14,833 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1651905006] [2023-11-06 23:05:14,833 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-06 23:05:14,834 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 44 states [2023-11-06 23:05:14,834 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 23:05:14,835 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2023-11-06 23:05:14,836 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=430, Invalid=1462, Unknown=0, NotChecked=0, Total=1892 [2023-11-06 23:05:15,025 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 55 out of 131 [2023-11-06 23:05:15,027 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 726 places, 934 transitions, 18598 flow. Second operand has 44 states, 44 states have (on average 56.09090909090909) internal successors, (2468), 44 states have internal predecessors, (2468), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 23:05:15,027 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 23:05:15,028 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 55 of 131 [2023-11-06 23:05:15,028 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 23:05:22,875 INFO L124 PetriNetUnfolderBase]: 4040/7555 cut-off events. [2023-11-06 23:05:22,876 INFO L125 PetriNetUnfolderBase]: For 4210011/4210011 co-relation queries the response was YES. [2023-11-06 23:05:23,088 INFO L83 FinitePrefix]: Finished finitePrefix Result has 140119 conditions, 7555 events. 4040/7555 cut-off events. For 4210011/4210011 co-relation queries the response was YES. Maximal size of possible extension queue 165. Compared 47304 event pairs, 1028 based on Foata normal form. 8/7563 useless extension candidates. Maximal degree in co-relation 139825. Up to 4293 conditions per place. [2023-11-06 23:05:23,148 INFO L140 encePairwiseOnDemand]: 126/131 looper letters, 694 selfloop transitions, 412 changer transitions 91/1197 dead transitions. [2023-11-06 23:05:23,149 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 773 places, 1197 transitions, 30028 flow [2023-11-06 23:05:23,149 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2023-11-06 23:05:23,149 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 48 states. [2023-11-06 23:05:23,153 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 2846 transitions. [2023-11-06 23:05:23,154 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4526081424936387 [2023-11-06 23:05:23,155 INFO L72 ComplementDD]: Start complementDD. Operand 48 states and 2846 transitions. [2023-11-06 23:05:23,155 INFO L73 IsDeterministic]: Start isDeterministic. Operand 48 states and 2846 transitions. [2023-11-06 23:05:23,156 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 23:05:23,157 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 48 states and 2846 transitions. [2023-11-06 23:05:23,162 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 49 states, 48 states have (on average 59.291666666666664) internal successors, (2846), 48 states have internal predecessors, (2846), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 23:05:23,169 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 49 states, 49 states have (on average 131.0) internal successors, (6419), 49 states have internal predecessors, (6419), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 23:05:23,171 INFO L81 ComplementDD]: Finished complementDD. Result has 49 states, 49 states have (on average 131.0) internal successors, (6419), 49 states have internal predecessors, (6419), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 23:05:23,171 INFO L175 Difference]: Start difference. First operand has 726 places, 934 transitions, 18598 flow. Second operand 48 states and 2846 transitions. [2023-11-06 23:05:23,171 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 773 places, 1197 transitions, 30028 flow [2023-11-06 23:05:39,875 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 764 places, 1197 transitions, 29387 flow, removed 286 selfloop flow, removed 9 redundant places. [2023-11-06 23:05:39,900 INFO L231 Difference]: Finished difference. Result has 802 places, 1050 transitions, 22463 flow [2023-11-06 23:05:39,900 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=131, PETRI_DIFFERENCE_MINUEND_FLOW=18001, PETRI_DIFFERENCE_MINUEND_PLACES=717, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=934, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=296, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=528, PETRI_DIFFERENCE_SUBTRAHEND_STATES=48, PETRI_FLOW=22463, PETRI_PLACES=802, PETRI_TRANSITIONS=1050} [2023-11-06 23:05:39,901 INFO L281 CegarLoopForPetriNet]: 18 programPoint places, 784 predicate places. [2023-11-06 23:05:39,901 INFO L495 AbstractCegarLoop]: Abstraction has has 802 places, 1050 transitions, 22463 flow [2023-11-06 23:05:39,901 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 44 states, 44 states have (on average 56.09090909090909) internal successors, (2468), 44 states have internal predecessors, (2468), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 23:05:39,901 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 23:05:39,902 INFO L208 CegarLoopForPetriNet]: trace histogram [20, 20, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 23:05:39,906 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0dcf83f7-8b7f-4f8b-857f-2b32dfddd8be/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2023-11-06 23:05:40,106 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0dcf83f7-8b7f-4f8b-857f-2b32dfddd8be/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 23:05:40,106 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-06 23:05:40,107 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 23:05:40,107 INFO L85 PathProgramCache]: Analyzing trace with hash -221910515, now seen corresponding path program 18 times [2023-11-06 23:05:40,107 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 23:05:40,108 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [785481801] [2023-11-06 23:05:40,108 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 23:05:40,108 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 23:05:40,157 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 23:05:41,508 INFO L134 CoverageAnalysis]: Checked inductivity of 380 backedges. 0 proven. 380 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 23:05:41,509 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 23:05:41,509 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [785481801] [2023-11-06 23:05:41,509 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [785481801] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-06 23:05:41,509 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1275105383] [2023-11-06 23:05:41,509 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-11-06 23:05:41,509 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 23:05:41,509 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0dcf83f7-8b7f-4f8b-857f-2b32dfddd8be/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 23:05:41,511 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0dcf83f7-8b7f-4f8b-857f-2b32dfddd8be/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 23:05:41,542 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0dcf83f7-8b7f-4f8b-857f-2b32dfddd8be/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2023-11-06 23:05:41,670 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 20 check-sat command(s) [2023-11-06 23:05:41,670 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-06 23:05:41,673 INFO L262 TraceCheckSpWp]: Trace formula consists of 304 conjuncts, 46 conjunts are in the unsatisfiable core [2023-11-06 23:05:41,675 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 23:05:41,905 INFO L134 CoverageAnalysis]: Checked inductivity of 380 backedges. 0 proven. 380 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 23:05:41,906 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 23:05:42,180 INFO L134 CoverageAnalysis]: Checked inductivity of 380 backedges. 0 proven. 380 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 23:05:42,181 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1275105383] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-06 23:05:42,181 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-06 23:05:42,181 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [42, 42, 42] total 43 [2023-11-06 23:05:42,181 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [432104149] [2023-11-06 23:05:42,182 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-06 23:05:42,182 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 45 states [2023-11-06 23:05:42,182 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 23:05:42,183 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 45 interpolants. [2023-11-06 23:05:42,184 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=415, Invalid=1565, Unknown=0, NotChecked=0, Total=1980 [2023-11-06 23:05:42,343 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 55 out of 131 [2023-11-06 23:05:42,345 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 802 places, 1050 transitions, 22463 flow. Second operand has 45 states, 45 states have (on average 56.111111111111114) internal successors, (2525), 45 states have internal predecessors, (2525), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 23:05:42,345 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 23:05:42,345 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 55 of 131 [2023-11-06 23:05:42,345 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 23:05:52,432 INFO L124 PetriNetUnfolderBase]: 4352/8179 cut-off events. [2023-11-06 23:05:52,432 INFO L125 PetriNetUnfolderBase]: For 4714823/4714823 co-relation queries the response was YES. [2023-11-06 23:05:52,636 INFO L83 FinitePrefix]: Finished finitePrefix Result has 156156 conditions, 8179 events. 4352/8179 cut-off events. For 4714823/4714823 co-relation queries the response was YES. Maximal size of possible extension queue 173. Compared 52202 event pairs, 922 based on Foata normal form. 8/8187 useless extension candidates. Maximal degree in co-relation 155824. Up to 3937 conditions per place. [2023-11-06 23:05:52,927 INFO L140 encePairwiseOnDemand]: 126/131 looper letters, 650 selfloop transitions, 540 changer transitions 97/1287 dead transitions. [2023-11-06 23:05:52,927 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 852 places, 1287 transitions, 33798 flow [2023-11-06 23:05:52,928 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2023-11-06 23:05:52,928 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 51 states. [2023-11-06 23:05:52,932 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 3029 transitions. [2023-11-06 23:05:52,934 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4533752432270618 [2023-11-06 23:05:52,934 INFO L72 ComplementDD]: Start complementDD. Operand 51 states and 3029 transitions. [2023-11-06 23:05:52,935 INFO L73 IsDeterministic]: Start isDeterministic. Operand 51 states and 3029 transitions. [2023-11-06 23:05:52,936 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 23:05:52,936 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 51 states and 3029 transitions. [2023-11-06 23:05:52,942 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 52 states, 51 states have (on average 59.3921568627451) internal successors, (3029), 51 states have internal predecessors, (3029), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 23:05:52,950 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 52 states, 52 states have (on average 131.0) internal successors, (6812), 52 states have internal predecessors, (6812), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 23:05:52,951 INFO L81 ComplementDD]: Finished complementDD. Result has 52 states, 52 states have (on average 131.0) internal successors, (6812), 52 states have internal predecessors, (6812), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 23:05:52,951 INFO L175 Difference]: Start difference. First operand has 802 places, 1050 transitions, 22463 flow. Second operand 51 states and 3029 transitions. [2023-11-06 23:05:52,951 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 852 places, 1287 transitions, 33798 flow [2023-11-06 23:06:12,821 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 843 places, 1287 transitions, 32876 flow, removed 397 selfloop flow, removed 9 redundant places. [2023-11-06 23:06:12,850 INFO L231 Difference]: Finished difference. Result has 880 places, 1130 transitions, 26026 flow [2023-11-06 23:06:12,851 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=131, PETRI_DIFFERENCE_MINUEND_FLOW=21845, PETRI_DIFFERENCE_MINUEND_PLACES=793, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1050, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=460, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=515, PETRI_DIFFERENCE_SUBTRAHEND_STATES=51, PETRI_FLOW=26026, PETRI_PLACES=880, PETRI_TRANSITIONS=1130} [2023-11-06 23:06:12,852 INFO L281 CegarLoopForPetriNet]: 18 programPoint places, 862 predicate places. [2023-11-06 23:06:12,852 INFO L495 AbstractCegarLoop]: Abstraction has has 880 places, 1130 transitions, 26026 flow [2023-11-06 23:06:12,852 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 45 states, 45 states have (on average 56.111111111111114) internal successors, (2525), 45 states have internal predecessors, (2525), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 23:06:12,852 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 23:06:12,852 INFO L208 CegarLoopForPetriNet]: trace histogram [20, 20, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 23:06:12,857 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0dcf83f7-8b7f-4f8b-857f-2b32dfddd8be/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2023-11-06 23:06:13,052 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0dcf83f7-8b7f-4f8b-857f-2b32dfddd8be/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 23:06:13,053 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-06 23:06:13,053 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 23:06:13,053 INFO L85 PathProgramCache]: Analyzing trace with hash -628571649, now seen corresponding path program 19 times [2023-11-06 23:06:13,053 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 23:06:13,053 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [479970105] [2023-11-06 23:06:13,053 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 23:06:13,054 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 23:06:13,081 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 23:06:14,253 INFO L134 CoverageAnalysis]: Checked inductivity of 380 backedges. 0 proven. 380 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 23:06:14,253 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 23:06:14,253 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [479970105] [2023-11-06 23:06:14,253 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [479970105] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-06 23:06:14,253 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1016033777] [2023-11-06 23:06:14,253 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-11-06 23:06:14,254 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 23:06:14,254 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0dcf83f7-8b7f-4f8b-857f-2b32dfddd8be/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 23:06:14,255 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0dcf83f7-8b7f-4f8b-857f-2b32dfddd8be/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 23:06:14,257 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0dcf83f7-8b7f-4f8b-857f-2b32dfddd8be/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2023-11-06 23:06:14,364 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 23:06:14,366 INFO L262 TraceCheckSpWp]: Trace formula consists of 304 conjuncts, 46 conjunts are in the unsatisfiable core [2023-11-06 23:06:14,369 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 23:06:14,516 INFO L134 CoverageAnalysis]: Checked inductivity of 380 backedges. 0 proven. 380 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 23:06:14,516 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 23:06:14,752 INFO L134 CoverageAnalysis]: Checked inductivity of 380 backedges. 0 proven. 380 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 23:06:14,753 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1016033777] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-06 23:06:14,753 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-06 23:06:14,753 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [42, 42, 42] total 42 [2023-11-06 23:06:14,753 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [445045650] [2023-11-06 23:06:14,753 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-06 23:06:14,754 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 44 states [2023-11-06 23:06:14,754 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 23:06:14,755 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2023-11-06 23:06:14,756 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=398, Invalid=1494, Unknown=0, NotChecked=0, Total=1892 [2023-11-06 23:06:14,968 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 55 out of 131 [2023-11-06 23:06:14,970 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 880 places, 1130 transitions, 26026 flow. Second operand has 44 states, 44 states have (on average 56.09090909090909) internal successors, (2468), 44 states have internal predecessors, (2468), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 23:06:14,970 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 23:06:14,970 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 55 of 131 [2023-11-06 23:06:14,970 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 23:06:24,909 INFO L124 PetriNetUnfolderBase]: 4456/8387 cut-off events. [2023-11-06 23:06:24,909 INFO L125 PetriNetUnfolderBase]: For 4802720/4802720 co-relation queries the response was YES. [2023-11-06 23:06:25,370 INFO L83 FinitePrefix]: Finished finitePrefix Result has 161963 conditions, 8387 events. 4456/8387 cut-off events. For 4802720/4802720 co-relation queries the response was YES. Maximal size of possible extension queue 174. Compared 53723 event pairs, 738 based on Foata normal form. 8/8395 useless extension candidates. Maximal degree in co-relation 161594. Up to 3213 conditions per place. [2023-11-06 23:06:25,429 INFO L140 encePairwiseOnDemand]: 126/131 looper letters, 550 selfloop transitions, 660 changer transitions 95/1305 dead transitions. [2023-11-06 23:06:25,429 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 929 places, 1305 transitions, 35886 flow [2023-11-06 23:06:25,429 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2023-11-06 23:06:25,429 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 50 states. [2023-11-06 23:06:25,432 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 2966 transitions. [2023-11-06 23:06:25,433 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.452824427480916 [2023-11-06 23:06:25,433 INFO L72 ComplementDD]: Start complementDD. Operand 50 states and 2966 transitions. [2023-11-06 23:06:25,433 INFO L73 IsDeterministic]: Start isDeterministic. Operand 50 states and 2966 transitions. [2023-11-06 23:06:25,434 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 23:06:25,434 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 50 states and 2966 transitions. [2023-11-06 23:06:25,437 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 51 states, 50 states have (on average 59.32) internal successors, (2966), 50 states have internal predecessors, (2966), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 23:06:25,443 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 51 states, 51 states have (on average 131.0) internal successors, (6681), 51 states have internal predecessors, (6681), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 23:06:25,444 INFO L81 ComplementDD]: Finished complementDD. Result has 51 states, 51 states have (on average 131.0) internal successors, (6681), 51 states have internal predecessors, (6681), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 23:06:25,445 INFO L175 Difference]: Start difference. First operand has 880 places, 1130 transitions, 26026 flow. Second operand 50 states and 2966 transitions. [2023-11-06 23:06:25,445 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 929 places, 1305 transitions, 35886 flow [2023-11-06 23:06:41,373 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 915 places, 1305 transitions, 34892 flow, removed 361 selfloop flow, removed 14 redundant places. [2023-11-06 23:06:41,415 INFO L231 Difference]: Finished difference. Result has 937 places, 1156 transitions, 27656 flow [2023-11-06 23:06:41,417 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=131, PETRI_DIFFERENCE_MINUEND_FLOW=25104, PETRI_DIFFERENCE_MINUEND_PLACES=866, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1130, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=634, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=470, PETRI_DIFFERENCE_SUBTRAHEND_STATES=50, PETRI_FLOW=27656, PETRI_PLACES=937, PETRI_TRANSITIONS=1156} [2023-11-06 23:06:41,418 INFO L281 CegarLoopForPetriNet]: 18 programPoint places, 919 predicate places. [2023-11-06 23:06:41,418 INFO L495 AbstractCegarLoop]: Abstraction has has 937 places, 1156 transitions, 27656 flow [2023-11-06 23:06:41,419 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 44 states, 44 states have (on average 56.09090909090909) internal successors, (2468), 44 states have internal predecessors, (2468), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 23:06:41,419 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 23:06:41,419 INFO L208 CegarLoopForPetriNet]: trace histogram [20, 20, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 23:06:41,425 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0dcf83f7-8b7f-4f8b-857f-2b32dfddd8be/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2023-11-06 23:06:41,625 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21,17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0dcf83f7-8b7f-4f8b-857f-2b32dfddd8be/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 23:06:41,626 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-06 23:06:41,626 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 23:06:41,626 INFO L85 PathProgramCache]: Analyzing trace with hash 875045877, now seen corresponding path program 20 times [2023-11-06 23:06:41,626 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 23:06:41,627 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1282185206] [2023-11-06 23:06:41,627 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 23:06:41,627 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 23:06:41,654 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 23:06:42,853 INFO L134 CoverageAnalysis]: Checked inductivity of 380 backedges. 0 proven. 380 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 23:06:42,853 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 23:06:42,854 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1282185206] [2023-11-06 23:06:42,854 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1282185206] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-06 23:06:42,854 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [525026955] [2023-11-06 23:06:42,854 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-06 23:06:42,854 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 23:06:42,854 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0dcf83f7-8b7f-4f8b-857f-2b32dfddd8be/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 23:06:42,855 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0dcf83f7-8b7f-4f8b-857f-2b32dfddd8be/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 23:06:42,857 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0dcf83f7-8b7f-4f8b-857f-2b32dfddd8be/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2023-11-06 23:06:42,980 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-11-06 23:06:42,980 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-06 23:06:42,983 INFO L262 TraceCheckSpWp]: Trace formula consists of 304 conjuncts, 46 conjunts are in the unsatisfiable core [2023-11-06 23:06:42,984 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 23:06:43,193 INFO L134 CoverageAnalysis]: Checked inductivity of 380 backedges. 0 proven. 380 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 23:06:43,194 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 23:06:43,469 INFO L134 CoverageAnalysis]: Checked inductivity of 380 backedges. 0 proven. 380 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 23:06:43,470 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [525026955] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-06 23:06:43,470 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-06 23:06:43,470 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [42, 42, 42] total 43 [2023-11-06 23:06:43,470 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1651966313] [2023-11-06 23:06:43,470 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-06 23:06:43,471 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 45 states [2023-11-06 23:06:43,471 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 23:06:43,471 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 45 interpolants. [2023-11-06 23:06:43,472 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=357, Invalid=1623, Unknown=0, NotChecked=0, Total=1980 [2023-11-06 23:06:43,637 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 55 out of 131 [2023-11-06 23:06:43,639 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 937 places, 1156 transitions, 27656 flow. Second operand has 45 states, 45 states have (on average 56.111111111111114) internal successors, (2525), 45 states have internal predecessors, (2525), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 23:06:43,639 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 23:06:43,639 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 55 of 131 [2023-11-06 23:06:43,639 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 23:06:55,757 INFO L124 PetriNetUnfolderBase]: 4836/9147 cut-off events. [2023-11-06 23:06:55,757 INFO L125 PetriNetUnfolderBase]: For 5362055/5362055 co-relation queries the response was YES. [2023-11-06 23:06:56,019 INFO L83 FinitePrefix]: Finished finitePrefix Result has 179252 conditions, 9147 events. 4836/9147 cut-off events. For 5362055/5362055 co-relation queries the response was YES. Maximal size of possible extension queue 198. Compared 60000 event pairs, 582 based on Foata normal form. 8/9155 useless extension candidates. Maximal degree in co-relation 178861. Up to 3154 conditions per place. [2023-11-06 23:06:56,098 INFO L140 encePairwiseOnDemand]: 126/131 looper letters, 469 selfloop transitions, 842 changer transitions 105/1416 dead transitions. [2023-11-06 23:06:56,098 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 991 places, 1416 transitions, 39591 flow [2023-11-06 23:06:56,099 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 55 states. [2023-11-06 23:06:56,099 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 55 states. [2023-11-06 23:06:56,102 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 3269 transitions. [2023-11-06 23:06:56,103 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4537126995142262 [2023-11-06 23:06:56,103 INFO L72 ComplementDD]: Start complementDD. Operand 55 states and 3269 transitions. [2023-11-06 23:06:56,103 INFO L73 IsDeterministic]: Start isDeterministic. Operand 55 states and 3269 transitions. [2023-11-06 23:06:56,104 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 23:06:56,105 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 55 states and 3269 transitions. [2023-11-06 23:06:56,110 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 56 states, 55 states have (on average 59.43636363636364) internal successors, (3269), 55 states have internal predecessors, (3269), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 23:06:56,116 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 56 states, 56 states have (on average 131.0) internal successors, (7336), 56 states have internal predecessors, (7336), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 23:06:56,117 INFO L81 ComplementDD]: Finished complementDD. Result has 56 states, 56 states have (on average 131.0) internal successors, (7336), 56 states have internal predecessors, (7336), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 23:06:56,118 INFO L175 Difference]: Start difference. First operand has 937 places, 1156 transitions, 27656 flow. Second operand 55 states and 3269 transitions. [2023-11-06 23:06:56,118 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 991 places, 1416 transitions, 39591 flow [2023-11-06 23:07:16,205 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 979 places, 1416 transitions, 38819 flow, removed 272 selfloop flow, removed 12 redundant places. [2023-11-06 23:07:16,260 INFO L231 Difference]: Finished difference. Result has 1012 places, 1252 transitions, 32209 flow [2023-11-06 23:07:16,262 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=131, PETRI_DIFFERENCE_MINUEND_FLOW=27044, PETRI_DIFFERENCE_MINUEND_PLACES=925, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1156, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=746, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=318, PETRI_DIFFERENCE_SUBTRAHEND_STATES=55, PETRI_FLOW=32209, PETRI_PLACES=1012, PETRI_TRANSITIONS=1252} [2023-11-06 23:07:16,263 INFO L281 CegarLoopForPetriNet]: 18 programPoint places, 994 predicate places. [2023-11-06 23:07:16,263 INFO L495 AbstractCegarLoop]: Abstraction has has 1012 places, 1252 transitions, 32209 flow [2023-11-06 23:07:16,264 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 45 states, 45 states have (on average 56.111111111111114) internal successors, (2525), 45 states have internal predecessors, (2525), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 23:07:16,264 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 23:07:16,264 INFO L208 CegarLoopForPetriNet]: trace histogram [20, 20, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 23:07:16,270 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0dcf83f7-8b7f-4f8b-857f-2b32dfddd8be/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Forceful destruction successful, exit code 0 [2023-11-06 23:07:16,470 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22,18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0dcf83f7-8b7f-4f8b-857f-2b32dfddd8be/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 23:07:16,470 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-06 23:07:16,471 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 23:07:16,471 INFO L85 PathProgramCache]: Analyzing trace with hash 1199455451, now seen corresponding path program 21 times [2023-11-06 23:07:16,471 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 23:07:16,471 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [781072676] [2023-11-06 23:07:16,471 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 23:07:16,471 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 23:07:16,503 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 23:07:17,719 INFO L134 CoverageAnalysis]: Checked inductivity of 380 backedges. 0 proven. 380 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 23:07:17,719 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 23:07:17,720 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [781072676] [2023-11-06 23:07:17,720 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [781072676] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-06 23:07:17,720 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [421942375] [2023-11-06 23:07:17,720 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-11-06 23:07:17,720 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 23:07:17,720 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0dcf83f7-8b7f-4f8b-857f-2b32dfddd8be/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 23:07:17,721 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0dcf83f7-8b7f-4f8b-857f-2b32dfddd8be/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 23:07:17,724 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0dcf83f7-8b7f-4f8b-857f-2b32dfddd8be/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2023-11-06 23:07:17,882 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 20 check-sat command(s) [2023-11-06 23:07:17,882 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-06 23:07:17,885 INFO L262 TraceCheckSpWp]: Trace formula consists of 304 conjuncts, 46 conjunts are in the unsatisfiable core [2023-11-06 23:07:17,887 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 23:07:18,053 INFO L134 CoverageAnalysis]: Checked inductivity of 380 backedges. 0 proven. 380 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 23:07:18,053 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 23:07:18,367 INFO L134 CoverageAnalysis]: Checked inductivity of 380 backedges. 0 proven. 380 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 23:07:18,368 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [421942375] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-06 23:07:18,368 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-06 23:07:18,368 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [42, 42, 42] total 42 [2023-11-06 23:07:18,368 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [39548685] [2023-11-06 23:07:18,368 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-06 23:07:18,369 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 44 states [2023-11-06 23:07:18,370 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 23:07:18,370 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2023-11-06 23:07:18,371 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=326, Invalid=1566, Unknown=0, NotChecked=0, Total=1892 [2023-11-06 23:07:18,535 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 55 out of 131 [2023-11-06 23:07:18,537 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 1012 places, 1252 transitions, 32209 flow. Second operand has 44 states, 44 states have (on average 56.09090909090909) internal successors, (2468), 44 states have internal predecessors, (2468), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 23:07:18,538 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 23:07:18,538 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 55 of 131 [2023-11-06 23:07:18,538 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand