./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/weaver/parallel-misc-4.wvr.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version e7bb482b Calling Ultimate with: /usr/lib/jvm/java-1.11.0-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_359d5117-3c4b-41d6-9bce-ea2e82d16c2e/bin/uautomizer-verify-WvqO1wxjHP/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_359d5117-3c4b-41d6-9bce-ea2e82d16c2e/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_359d5117-3c4b-41d6-9bce-ea2e82d16c2e/bin/uautomizer-verify-WvqO1wxjHP/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_359d5117-3c4b-41d6-9bce-ea2e82d16c2e/bin/uautomizer-verify-WvqO1wxjHP/config/AutomizerReach.xml -i ../../sv-benchmarks/c/weaver/parallel-misc-4.wvr.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_359d5117-3c4b-41d6-9bce-ea2e82d16c2e/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_359d5117-3c4b-41d6-9bce-ea2e82d16c2e/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 4ed4cbcf73a390a7811d007883e420d1e9d8d4b9f5e59201847b4262dc4b0025 --- Real Ultimate output --- This is Ultimate 0.2.3-dev-e7bb482 [2023-11-06 22:33:10,324 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-11-06 22:33:10,451 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_359d5117-3c4b-41d6-9bce-ea2e82d16c2e/bin/uautomizer-verify-WvqO1wxjHP/config/svcomp-Reach-32bit-Automizer_Default.epf [2023-11-06 22:33:10,461 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-11-06 22:33:10,462 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-11-06 22:33:10,509 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-11-06 22:33:10,511 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-11-06 22:33:10,511 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-11-06 22:33:10,512 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-11-06 22:33:10,517 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-11-06 22:33:10,518 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-11-06 22:33:10,518 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-11-06 22:33:10,519 INFO L153 SettingsManager]: * Use SBE=true [2023-11-06 22:33:10,521 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-11-06 22:33:10,521 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-11-06 22:33:10,522 INFO L153 SettingsManager]: * sizeof long=4 [2023-11-06 22:33:10,522 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-11-06 22:33:10,522 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-11-06 22:33:10,523 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-11-06 22:33:10,523 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-11-06 22:33:10,524 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-11-06 22:33:10,524 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-11-06 22:33:10,525 INFO L153 SettingsManager]: * sizeof long double=12 [2023-11-06 22:33:10,525 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-11-06 22:33:10,525 INFO L153 SettingsManager]: * Use constant arrays=true [2023-11-06 22:33:10,526 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-11-06 22:33:10,527 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-11-06 22:33:10,527 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-11-06 22:33:10,528 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-06 22:33:10,528 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-11-06 22:33:10,530 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-11-06 22:33:10,530 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-11-06 22:33:10,530 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-11-06 22:33:10,539 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-11-06 22:33:10,540 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-11-06 22:33:10,540 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-11-06 22:33:10,540 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-11-06 22:33:10,541 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-11-06 22:33:10,541 INFO L153 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-11-06 22:33:10,541 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_359d5117-3c4b-41d6-9bce-ea2e82d16c2e/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_359d5117-3c4b-41d6-9bce-ea2e82d16c2e/bin/uautomizer-verify-WvqO1wxjHP Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 4ed4cbcf73a390a7811d007883e420d1e9d8d4b9f5e59201847b4262dc4b0025 [2023-11-06 22:33:10,852 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-11-06 22:33:10,888 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-11-06 22:33:10,890 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-11-06 22:33:10,892 INFO L270 PluginConnector]: Initializing CDTParser... [2023-11-06 22:33:10,893 INFO L274 PluginConnector]: CDTParser initialized [2023-11-06 22:33:10,894 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_359d5117-3c4b-41d6-9bce-ea2e82d16c2e/bin/uautomizer-verify-WvqO1wxjHP/../../sv-benchmarks/c/weaver/parallel-misc-4.wvr.c [2023-11-06 22:33:14,046 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-11-06 22:33:14,319 INFO L384 CDTParser]: Found 1 translation units. [2023-11-06 22:33:14,319 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_359d5117-3c4b-41d6-9bce-ea2e82d16c2e/sv-benchmarks/c/weaver/parallel-misc-4.wvr.c [2023-11-06 22:33:14,328 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_359d5117-3c4b-41d6-9bce-ea2e82d16c2e/bin/uautomizer-verify-WvqO1wxjHP/data/590a3002b/98ffdbbdd7e045bcbe4dd73e3b7423c0/FLAGad04be13c [2023-11-06 22:33:14,348 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_359d5117-3c4b-41d6-9bce-ea2e82d16c2e/bin/uautomizer-verify-WvqO1wxjHP/data/590a3002b/98ffdbbdd7e045bcbe4dd73e3b7423c0 [2023-11-06 22:33:14,350 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-11-06 22:33:14,352 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2023-11-06 22:33:14,353 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-11-06 22:33:14,354 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-11-06 22:33:14,363 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-11-06 22:33:14,363 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.11 10:33:14" (1/1) ... [2023-11-06 22:33:14,364 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@69c9b110 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:33:14, skipping insertion in model container [2023-11-06 22:33:14,365 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.11 10:33:14" (1/1) ... [2023-11-06 22:33:14,389 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-11-06 22:33:14,576 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_359d5117-3c4b-41d6-9bce-ea2e82d16c2e/sv-benchmarks/c/weaver/parallel-misc-4.wvr.c[2950,2963] [2023-11-06 22:33:14,582 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-06 22:33:14,592 INFO L202 MainTranslator]: Completed pre-run [2023-11-06 22:33:14,617 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_359d5117-3c4b-41d6-9bce-ea2e82d16c2e/sv-benchmarks/c/weaver/parallel-misc-4.wvr.c[2950,2963] [2023-11-06 22:33:14,618 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-06 22:33:14,627 WARN L672 CHandler]: The function __VERIFIER_atomic_begin is called, but not defined or handled by StandardFunctionHandler. [2023-11-06 22:33:14,629 WARN L672 CHandler]: The function __VERIFIER_atomic_end is called, but not defined or handled by StandardFunctionHandler. [2023-11-06 22:33:14,637 INFO L206 MainTranslator]: Completed translation [2023-11-06 22:33:14,638 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:33:14 WrapperNode [2023-11-06 22:33:14,639 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-11-06 22:33:14,640 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-11-06 22:33:14,640 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-11-06 22:33:14,641 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-11-06 22:33:14,647 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:33:14" (1/1) ... [2023-11-06 22:33:14,654 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:33:14" (1/1) ... [2023-11-06 22:33:14,674 INFO L138 Inliner]: procedures = 22, calls = 43, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 74 [2023-11-06 22:33:14,674 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-11-06 22:33:14,675 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-11-06 22:33:14,675 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-11-06 22:33:14,676 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-11-06 22:33:14,685 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:33:14" (1/1) ... [2023-11-06 22:33:14,685 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:33:14" (1/1) ... [2023-11-06 22:33:14,688 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:33:14" (1/1) ... [2023-11-06 22:33:14,688 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:33:14" (1/1) ... [2023-11-06 22:33:14,694 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:33:14" (1/1) ... [2023-11-06 22:33:14,698 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:33:14" (1/1) ... [2023-11-06 22:33:14,700 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:33:14" (1/1) ... [2023-11-06 22:33:14,701 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:33:14" (1/1) ... [2023-11-06 22:33:14,706 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-11-06 22:33:14,708 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-11-06 22:33:14,713 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-11-06 22:33:14,714 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-11-06 22:33:14,715 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:33:14" (1/1) ... [2023-11-06 22:33:14,722 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-06 22:33:14,746 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_359d5117-3c4b-41d6-9bce-ea2e82d16c2e/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 22:33:14,769 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_359d5117-3c4b-41d6-9bce-ea2e82d16c2e/bin/uautomizer-verify-WvqO1wxjHP/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-11-06 22:33:14,776 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_359d5117-3c4b-41d6-9bce-ea2e82d16c2e/bin/uautomizer-verify-WvqO1wxjHP/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-11-06 22:33:14,815 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-11-06 22:33:14,815 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2023-11-06 22:33:14,815 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2023-11-06 22:33:14,815 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2023-11-06 22:33:14,816 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2023-11-06 22:33:14,816 INFO L130 BoogieDeclarations]: Found specification of procedure thread3 [2023-11-06 22:33:14,816 INFO L138 BoogieDeclarations]: Found implementation of procedure thread3 [2023-11-06 22:33:14,816 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-11-06 22:33:14,816 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-11-06 22:33:14,817 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-11-06 22:33:14,817 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2023-11-06 22:33:14,819 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2023-11-06 22:33:14,820 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-11-06 22:33:14,820 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-11-06 22:33:14,820 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-11-06 22:33:14,821 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-11-06 22:33:14,822 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 22:33:14,980 INFO L236 CfgBuilder]: Building ICFG [2023-11-06 22:33:14,982 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-11-06 22:33:15,279 INFO L277 CfgBuilder]: Performing block encoding [2023-11-06 22:33:15,324 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-11-06 22:33:15,329 INFO L302 CfgBuilder]: Removed 2 assume(true) statements. [2023-11-06 22:33:15,332 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.11 10:33:15 BoogieIcfgContainer [2023-11-06 22:33:15,334 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-11-06 22:33:15,338 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-11-06 22:33:15,339 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-11-06 22:33:15,342 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-11-06 22:33:15,343 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 06.11 10:33:14" (1/3) ... [2023-11-06 22:33:15,344 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4779cfde and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.11 10:33:15, skipping insertion in model container [2023-11-06 22:33:15,345 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:33:14" (2/3) ... [2023-11-06 22:33:15,346 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4779cfde and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.11 10:33:15, skipping insertion in model container [2023-11-06 22:33:15,346 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.11 10:33:15" (3/3) ... [2023-11-06 22:33:15,349 INFO L112 eAbstractionObserver]: Analyzing ICFG parallel-misc-4.wvr.c [2023-11-06 22:33:15,359 WARN L145 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2023-11-06 22:33:15,370 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-11-06 22:33:15,371 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-11-06 22:33:15,371 INFO L519 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-11-06 22:33:15,466 INFO L144 ThreadInstanceAdder]: Constructed 3 joinOtherThreadTransitions. [2023-11-06 22:33:15,515 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 108 places, 105 transitions, 231 flow [2023-11-06 22:33:15,579 INFO L124 PetriNetUnfolderBase]: 7/102 cut-off events. [2023-11-06 22:33:15,579 INFO L125 PetriNetUnfolderBase]: For 3/3 co-relation queries the response was YES. [2023-11-06 22:33:15,585 INFO L83 FinitePrefix]: Finished finitePrefix Result has 115 conditions, 102 events. 7/102 cut-off events. For 3/3 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 70 event pairs, 0 based on Foata normal form. 0/94 useless extension candidates. Maximal degree in co-relation 79. Up to 2 conditions per place. [2023-11-06 22:33:15,585 INFO L82 GeneralOperation]: Start removeDead. Operand has 108 places, 105 transitions, 231 flow [2023-11-06 22:33:15,590 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 94 places, 91 transitions, 200 flow [2023-11-06 22:33:15,594 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-11-06 22:33:15,612 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 94 places, 91 transitions, 200 flow [2023-11-06 22:33:15,617 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 94 places, 91 transitions, 200 flow [2023-11-06 22:33:15,618 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 94 places, 91 transitions, 200 flow [2023-11-06 22:33:15,663 INFO L124 PetriNetUnfolderBase]: 7/91 cut-off events. [2023-11-06 22:33:15,663 INFO L125 PetriNetUnfolderBase]: For 3/3 co-relation queries the response was YES. [2023-11-06 22:33:15,665 INFO L83 FinitePrefix]: Finished finitePrefix Result has 104 conditions, 91 events. 7/91 cut-off events. For 3/3 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 68 event pairs, 0 based on Foata normal form. 0/84 useless extension candidates. Maximal degree in co-relation 79. Up to 2 conditions per place. [2023-11-06 22:33:15,667 INFO L119 LiptonReduction]: Number of co-enabled transitions 1134 [2023-11-06 22:33:19,582 INFO L134 LiptonReduction]: Checked pairs total: 1391 [2023-11-06 22:33:19,582 INFO L136 LiptonReduction]: Total number of compositions: 73 [2023-11-06 22:33:19,598 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-06 22:33:19,604 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;@6f064abc, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-11-06 22:33:19,605 INFO L358 AbstractCegarLoop]: Starting to check reachability of 4 error locations. [2023-11-06 22:33:19,613 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-11-06 22:33:19,613 INFO L124 PetriNetUnfolderBase]: 2/21 cut-off events. [2023-11-06 22:33:19,614 INFO L125 PetriNetUnfolderBase]: For 3/3 co-relation queries the response was YES. [2023-11-06 22:33:19,614 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 22:33:19,615 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 22:33:19,615 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-11-06 22:33:19,621 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:33:19,621 INFO L85 PathProgramCache]: Analyzing trace with hash 446454821, now seen corresponding path program 1 times [2023-11-06 22:33:19,631 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:33:19,631 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [121202446] [2023-11-06 22:33:19,632 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:33:19,632 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:33:19,805 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:33:20,324 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 22:33:20,326 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:33:20,326 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [121202446] [2023-11-06 22:33:20,327 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [121202446] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-06 22:33:20,328 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-06 22:33:20,328 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-11-06 22:33:20,330 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [984863] [2023-11-06 22:33:20,331 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 22:33:20,340 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-06 22:33:20,348 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:33:20,378 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-06 22:33:20,378 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-11-06 22:33:20,465 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 84 out of 178 [2023-11-06 22:33:20,472 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 30 places, 22 transitions, 62 flow. Second operand has 5 states, 5 states have (on average 87.4) internal successors, (437), 5 states have internal predecessors, (437), 0 states have call successors, (0), 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 22:33:20,473 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 22:33:20,473 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 84 of 178 [2023-11-06 22:33:20,474 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 22:33:20,823 INFO L124 PetriNetUnfolderBase]: 416/658 cut-off events. [2023-11-06 22:33:20,823 INFO L125 PetriNetUnfolderBase]: For 77/77 co-relation queries the response was YES. [2023-11-06 22:33:20,831 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1403 conditions, 658 events. 416/658 cut-off events. For 77/77 co-relation queries the response was YES. Maximal size of possible extension queue 53. Compared 2572 event pairs, 65 based on Foata normal form. 0/521 useless extension candidates. Maximal degree in co-relation 1127. Up to 373 conditions per place. [2023-11-06 22:33:20,840 INFO L140 encePairwiseOnDemand]: 171/178 looper letters, 52 selfloop transitions, 5 changer transitions 19/77 dead transitions. [2023-11-06 22:33:20,840 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 36 places, 77 transitions, 360 flow [2023-11-06 22:33:20,841 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-11-06 22:33:20,844 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2023-11-06 22:33:20,864 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 666 transitions. [2023-11-06 22:33:20,869 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5345104333868379 [2023-11-06 22:33:20,870 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 666 transitions. [2023-11-06 22:33:20,871 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 666 transitions. [2023-11-06 22:33:20,876 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 22:33:20,879 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 666 transitions. [2023-11-06 22:33:20,886 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 95.14285714285714) internal successors, (666), 7 states have internal predecessors, (666), 0 states have call successors, (0), 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 22:33:20,897 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 178.0) internal successors, (1424), 8 states have internal predecessors, (1424), 0 states have call successors, (0), 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 22:33:20,899 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 178.0) internal successors, (1424), 8 states have internal predecessors, (1424), 0 states have call successors, (0), 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 22:33:20,901 INFO L175 Difference]: Start difference. First operand has 30 places, 22 transitions, 62 flow. Second operand 7 states and 666 transitions. [2023-11-06 22:33:20,902 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 36 places, 77 transitions, 360 flow [2023-11-06 22:33:20,907 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 30 places, 77 transitions, 324 flow, removed 0 selfloop flow, removed 6 redundant places. [2023-11-06 22:33:20,909 INFO L231 Difference]: Finished difference. Result has 35 places, 26 transitions, 99 flow [2023-11-06 22:33:20,912 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=178, PETRI_DIFFERENCE_MINUEND_FLOW=50, PETRI_DIFFERENCE_MINUEND_PLACES=24, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=22, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=18, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=99, PETRI_PLACES=35, PETRI_TRANSITIONS=26} [2023-11-06 22:33:20,915 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 5 predicate places. [2023-11-06 22:33:20,916 INFO L495 AbstractCegarLoop]: Abstraction has has 35 places, 26 transitions, 99 flow [2023-11-06 22:33:20,916 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 87.4) internal successors, (437), 5 states have internal predecessors, (437), 0 states have call successors, (0), 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 22:33:20,916 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 22:33:20,917 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 22:33:20,917 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-11-06 22:33:20,917 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-11-06 22:33:20,918 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:33:20,918 INFO L85 PathProgramCache]: Analyzing trace with hash 310854369, now seen corresponding path program 2 times [2023-11-06 22:33:20,919 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:33:20,919 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [102698377] [2023-11-06 22:33:20,919 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:33:20,919 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:33:20,976 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:33:21,101 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 22:33:21,101 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:33:21,101 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [102698377] [2023-11-06 22:33:21,102 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [102698377] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-06 22:33:21,102 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-06 22:33:21,102 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-06 22:33:21,102 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1466267647] [2023-11-06 22:33:21,103 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 22:33:21,104 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-06 22:33:21,104 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:33:21,105 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-06 22:33:21,106 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-06 22:33:21,131 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 87 out of 178 [2023-11-06 22:33:21,132 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 35 places, 26 transitions, 99 flow. Second operand has 4 states, 4 states have (on average 91.25) internal successors, (365), 4 states have internal predecessors, (365), 0 states have call successors, (0), 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 22:33:21,132 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 22:33:21,133 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 87 of 178 [2023-11-06 22:33:21,133 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 22:33:21,312 INFO L124 PetriNetUnfolderBase]: 268/444 cut-off events. [2023-11-06 22:33:21,312 INFO L125 PetriNetUnfolderBase]: For 605/621 co-relation queries the response was YES. [2023-11-06 22:33:21,313 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1416 conditions, 444 events. 268/444 cut-off events. For 605/621 co-relation queries the response was YES. Maximal size of possible extension queue 34. Compared 1664 event pairs, 18 based on Foata normal form. 28/462 useless extension candidates. Maximal degree in co-relation 919. Up to 249 conditions per place. [2023-11-06 22:33:21,317 INFO L140 encePairwiseOnDemand]: 174/178 looper letters, 37 selfloop transitions, 6 changer transitions 0/44 dead transitions. [2023-11-06 22:33:21,318 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 36 places, 44 transitions, 262 flow [2023-11-06 22:33:21,318 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-06 22:33:21,318 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-11-06 22:33:21,320 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 386 transitions. [2023-11-06 22:33:21,320 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5421348314606742 [2023-11-06 22:33:21,320 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 386 transitions. [2023-11-06 22:33:21,321 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 386 transitions. [2023-11-06 22:33:21,321 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 22:33:21,321 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 386 transitions. [2023-11-06 22:33:21,323 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 96.5) internal successors, (386), 4 states have internal predecessors, (386), 0 states have call successors, (0), 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 22:33:21,325 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 178.0) internal successors, (890), 5 states have internal predecessors, (890), 0 states have call successors, (0), 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 22:33:21,326 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 178.0) internal successors, (890), 5 states have internal predecessors, (890), 0 states have call successors, (0), 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 22:33:21,326 INFO L175 Difference]: Start difference. First operand has 35 places, 26 transitions, 99 flow. Second operand 4 states and 386 transitions. [2023-11-06 22:33:21,327 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 36 places, 44 transitions, 262 flow [2023-11-06 22:33:21,330 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 33 places, 44 transitions, 247 flow, removed 3 selfloop flow, removed 3 redundant places. [2023-11-06 22:33:21,331 INFO L231 Difference]: Finished difference. Result has 35 places, 29 transitions, 124 flow [2023-11-06 22:33:21,332 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=178, PETRI_DIFFERENCE_MINUEND_FLOW=91, PETRI_DIFFERENCE_MINUEND_PLACES=30, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=26, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=22, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=124, PETRI_PLACES=35, PETRI_TRANSITIONS=29} [2023-11-06 22:33:21,333 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 5 predicate places. [2023-11-06 22:33:21,333 INFO L495 AbstractCegarLoop]: Abstraction has has 35 places, 29 transitions, 124 flow [2023-11-06 22:33:21,334 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 91.25) internal successors, (365), 4 states have internal predecessors, (365), 0 states have call successors, (0), 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 22:33:21,334 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 22:33:21,334 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 22:33:21,334 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-11-06 22:33:21,335 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-11-06 22:33:21,335 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:33:21,336 INFO L85 PathProgramCache]: Analyzing trace with hash 1382655641, now seen corresponding path program 3 times [2023-11-06 22:33:21,336 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:33:21,336 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [133404428] [2023-11-06 22:33:21,336 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:33:21,337 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:33:21,368 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:33:21,485 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 22:33:21,485 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:33:21,486 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [133404428] [2023-11-06 22:33:21,486 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [133404428] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-06 22:33:21,486 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-06 22:33:21,486 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-06 22:33:21,487 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1081668938] [2023-11-06 22:33:21,487 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 22:33:21,487 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-06 22:33:21,488 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:33:21,488 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-06 22:33:21,491 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-06 22:33:21,513 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 87 out of 178 [2023-11-06 22:33:21,514 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 35 places, 29 transitions, 124 flow. Second operand has 4 states, 4 states have (on average 91.25) internal successors, (365), 4 states have internal predecessors, (365), 0 states have call successors, (0), 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 22:33:21,515 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 22:33:21,515 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 87 of 178 [2023-11-06 22:33:21,515 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 22:33:21,660 INFO L124 PetriNetUnfolderBase]: 199/353 cut-off events. [2023-11-06 22:33:21,660 INFO L125 PetriNetUnfolderBase]: For 413/430 co-relation queries the response was YES. [2023-11-06 22:33:21,661 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1136 conditions, 353 events. 199/353 cut-off events. For 413/430 co-relation queries the response was YES. Maximal size of possible extension queue 26. Compared 1224 event pairs, 32 based on Foata normal form. 33/386 useless extension candidates. Maximal degree in co-relation 1025. Up to 221 conditions per place. [2023-11-06 22:33:21,664 INFO L140 encePairwiseOnDemand]: 174/178 looper letters, 33 selfloop transitions, 7 changer transitions 2/44 dead transitions. [2023-11-06 22:33:21,665 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 38 places, 44 transitions, 281 flow [2023-11-06 22:33:21,665 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-06 22:33:21,665 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-11-06 22:33:21,667 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 382 transitions. [2023-11-06 22:33:21,667 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5365168539325843 [2023-11-06 22:33:21,668 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 382 transitions. [2023-11-06 22:33:21,668 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 382 transitions. [2023-11-06 22:33:21,669 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 22:33:21,669 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 382 transitions. [2023-11-06 22:33:21,670 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 95.5) internal successors, (382), 4 states have internal predecessors, (382), 0 states have call successors, (0), 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 22:33:21,673 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 178.0) internal successors, (890), 5 states have internal predecessors, (890), 0 states have call successors, (0), 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 22:33:21,674 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 178.0) internal successors, (890), 5 states have internal predecessors, (890), 0 states have call successors, (0), 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 22:33:21,674 INFO L175 Difference]: Start difference. First operand has 35 places, 29 transitions, 124 flow. Second operand 4 states and 382 transitions. [2023-11-06 22:33:21,674 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 38 places, 44 transitions, 281 flow [2023-11-06 22:33:21,681 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 37 places, 44 transitions, 273 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-11-06 22:33:21,683 INFO L231 Difference]: Finished difference. Result has 39 places, 31 transitions, 156 flow [2023-11-06 22:33:21,683 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=178, PETRI_DIFFERENCE_MINUEND_FLOW=119, PETRI_DIFFERENCE_MINUEND_PLACES=34, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=29, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=23, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=156, PETRI_PLACES=39, PETRI_TRANSITIONS=31} [2023-11-06 22:33:21,685 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 9 predicate places. [2023-11-06 22:33:21,688 INFO L495 AbstractCegarLoop]: Abstraction has has 39 places, 31 transitions, 156 flow [2023-11-06 22:33:21,689 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 91.25) internal successors, (365), 4 states have internal predecessors, (365), 0 states have call successors, (0), 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 22:33:21,690 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 22:33:21,690 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 22:33:21,690 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-11-06 22:33:21,690 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-11-06 22:33:21,692 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:33:21,692 INFO L85 PathProgramCache]: Analyzing trace with hash 1533535495, now seen corresponding path program 4 times [2023-11-06 22:33:21,692 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:33:21,693 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2040634187] [2023-11-06 22:33:21,693 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:33:21,693 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:33:21,738 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:33:21,888 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 22:33:21,888 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:33:21,888 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2040634187] [2023-11-06 22:33:21,888 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2040634187] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-06 22:33:21,889 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-06 22:33:21,889 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-11-06 22:33:21,889 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2107583718] [2023-11-06 22:33:21,889 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 22:33:21,891 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-06 22:33:21,892 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:33:21,893 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-06 22:33:21,894 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-11-06 22:33:21,944 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 86 out of 178 [2023-11-06 22:33:21,945 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 39 places, 31 transitions, 156 flow. Second operand has 5 states, 5 states have (on average 89.6) internal successors, (448), 5 states have internal predecessors, (448), 0 states have call successors, (0), 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 22:33:21,945 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 22:33:21,946 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 86 of 178 [2023-11-06 22:33:21,946 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 22:33:22,107 INFO L124 PetriNetUnfolderBase]: 209/361 cut-off events. [2023-11-06 22:33:22,107 INFO L125 PetriNetUnfolderBase]: For 632/657 co-relation queries the response was YES. [2023-11-06 22:33:22,109 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1248 conditions, 361 events. 209/361 cut-off events. For 632/657 co-relation queries the response was YES. Maximal size of possible extension queue 28. Compared 1240 event pairs, 22 based on Foata normal form. 25/381 useless extension candidates. Maximal degree in co-relation 1078. Up to 146 conditions per place. [2023-11-06 22:33:22,112 INFO L140 encePairwiseOnDemand]: 172/178 looper letters, 38 selfloop transitions, 10 changer transitions 0/50 dead transitions. [2023-11-06 22:33:22,112 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 43 places, 50 transitions, 338 flow [2023-11-06 22:33:22,113 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-06 22:33:22,113 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-11-06 22:33:22,115 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 471 transitions. [2023-11-06 22:33:22,115 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5292134831460674 [2023-11-06 22:33:22,116 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 471 transitions. [2023-11-06 22:33:22,116 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 471 transitions. [2023-11-06 22:33:22,116 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 22:33:22,117 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 471 transitions. [2023-11-06 22:33:22,118 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 94.2) internal successors, (471), 5 states have internal predecessors, (471), 0 states have call successors, (0), 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 22:33:22,121 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 178.0) internal successors, (1068), 6 states have internal predecessors, (1068), 0 states have call successors, (0), 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 22:33:22,122 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 178.0) internal successors, (1068), 6 states have internal predecessors, (1068), 0 states have call successors, (0), 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 22:33:22,122 INFO L175 Difference]: Start difference. First operand has 39 places, 31 transitions, 156 flow. Second operand 5 states and 471 transitions. [2023-11-06 22:33:22,123 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 43 places, 50 transitions, 338 flow [2023-11-06 22:33:22,126 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 42 places, 50 transitions, 328 flow, removed 2 selfloop flow, removed 1 redundant places. [2023-11-06 22:33:22,128 INFO L231 Difference]: Finished difference. Result has 44 places, 34 transitions, 202 flow [2023-11-06 22:33:22,128 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=178, PETRI_DIFFERENCE_MINUEND_FLOW=146, PETRI_DIFFERENCE_MINUEND_PLACES=38, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=31, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=21, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=202, PETRI_PLACES=44, PETRI_TRANSITIONS=34} [2023-11-06 22:33:22,130 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 14 predicate places. [2023-11-06 22:33:22,130 INFO L495 AbstractCegarLoop]: Abstraction has has 44 places, 34 transitions, 202 flow [2023-11-06 22:33:22,132 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 89.6) internal successors, (448), 5 states have internal predecessors, (448), 0 states have call successors, (0), 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 22:33:22,132 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 22:33:22,132 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 22:33:22,133 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-11-06 22:33:22,133 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-11-06 22:33:22,133 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:33:22,133 INFO L85 PathProgramCache]: Analyzing trace with hash 1261577215, now seen corresponding path program 5 times [2023-11-06 22:33:22,134 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:33:22,135 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1710118362] [2023-11-06 22:33:22,135 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:33:22,135 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:33:22,178 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:33:22,349 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 22:33:22,352 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:33:22,353 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1710118362] [2023-11-06 22:33:22,353 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1710118362] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-06 22:33:22,353 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-06 22:33:22,353 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-11-06 22:33:22,354 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1389797526] [2023-11-06 22:33:22,354 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 22:33:22,355 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-06 22:33:22,355 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:33:22,365 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-06 22:33:22,366 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-11-06 22:33:22,416 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 83 out of 178 [2023-11-06 22:33:22,417 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 44 places, 34 transitions, 202 flow. Second operand has 5 states, 5 states have (on average 86.4) internal successors, (432), 5 states have internal predecessors, (432), 0 states have call successors, (0), 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 22:33:22,417 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 22:33:22,418 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 83 of 178 [2023-11-06 22:33:22,418 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 22:33:22,598 INFO L124 PetriNetUnfolderBase]: 199/330 cut-off events. [2023-11-06 22:33:22,598 INFO L125 PetriNetUnfolderBase]: For 981/1009 co-relation queries the response was YES. [2023-11-06 22:33:22,600 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1300 conditions, 330 events. 199/330 cut-off events. For 981/1009 co-relation queries the response was YES. Maximal size of possible extension queue 28. Compared 1058 event pairs, 15 based on Foata normal form. 27/353 useless extension candidates. Maximal degree in co-relation 880. Up to 240 conditions per place. [2023-11-06 22:33:22,603 INFO L140 encePairwiseOnDemand]: 171/178 looper letters, 31 selfloop transitions, 3 changer transitions 18/54 dead transitions. [2023-11-06 22:33:22,603 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 50 places, 54 transitions, 402 flow [2023-11-06 22:33:22,604 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-11-06 22:33:22,604 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2023-11-06 22:33:22,606 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 629 transitions. [2023-11-06 22:33:22,607 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5048154093097913 [2023-11-06 22:33:22,607 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 629 transitions. [2023-11-06 22:33:22,607 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 629 transitions. [2023-11-06 22:33:22,608 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 22:33:22,609 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 629 transitions. [2023-11-06 22:33:22,611 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 89.85714285714286) internal successors, (629), 7 states have internal predecessors, (629), 0 states have call successors, (0), 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 22:33:22,615 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 178.0) internal successors, (1424), 8 states have internal predecessors, (1424), 0 states have call successors, (0), 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 22:33:22,618 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 178.0) internal successors, (1424), 8 states have internal predecessors, (1424), 0 states have call successors, (0), 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 22:33:22,618 INFO L175 Difference]: Start difference. First operand has 44 places, 34 transitions, 202 flow. Second operand 7 states and 629 transitions. [2023-11-06 22:33:22,618 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 50 places, 54 transitions, 402 flow [2023-11-06 22:33:22,621 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 48 places, 54 transitions, 392 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-11-06 22:33:22,624 INFO L231 Difference]: Finished difference. Result has 52 places, 30 transitions, 168 flow [2023-11-06 22:33:22,624 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=178, PETRI_DIFFERENCE_MINUEND_FLOW=194, PETRI_DIFFERENCE_MINUEND_PLACES=42, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=34, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=31, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=168, PETRI_PLACES=52, PETRI_TRANSITIONS=30} [2023-11-06 22:33:22,626 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 22 predicate places. [2023-11-06 22:33:22,627 INFO L495 AbstractCegarLoop]: Abstraction has has 52 places, 30 transitions, 168 flow [2023-11-06 22:33:22,627 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 86.4) internal successors, (432), 5 states have internal predecessors, (432), 0 states have call successors, (0), 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 22:33:22,627 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 22:33:22,628 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 22:33:22,628 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2023-11-06 22:33:22,628 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-11-06 22:33:22,628 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:33:22,629 INFO L85 PathProgramCache]: Analyzing trace with hash -1095774586, now seen corresponding path program 1 times [2023-11-06 22:33:22,629 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:33:22,629 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1893395696] [2023-11-06 22:33:22,629 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:33:22,630 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:33:22,653 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:33:22,868 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 22:33:22,868 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:33:22,869 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1893395696] [2023-11-06 22:33:22,869 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1893395696] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-06 22:33:22,869 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [46006785] [2023-11-06 22:33:22,870 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:33:22,870 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:33:22,870 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_359d5117-3c4b-41d6-9bce-ea2e82d16c2e/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 22:33:22,874 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_359d5117-3c4b-41d6-9bce-ea2e82d16c2e/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 22:33:22,883 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_359d5117-3c4b-41d6-9bce-ea2e82d16c2e/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-11-06 22:33:22,978 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:33:22,980 INFO L262 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 4 conjunts are in the unsatisfiable core [2023-11-06 22:33:22,986 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 22:33:23,087 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:33:23,088 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-06 22:33:23,088 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [46006785] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-06 22:33:23,088 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-06 22:33:23,088 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [5] total 7 [2023-11-06 22:33:23,089 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1485286323] [2023-11-06 22:33:23,089 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 22:33:23,089 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-06 22:33:23,090 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:33:23,090 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-06 22:33:23,091 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2023-11-06 22:33:23,117 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 87 out of 178 [2023-11-06 22:33:23,118 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 52 places, 30 transitions, 168 flow. Second operand has 4 states, 4 states have (on average 91.75) internal successors, (367), 4 states have internal predecessors, (367), 0 states have call successors, (0), 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 22:33:23,118 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 22:33:23,118 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 87 of 178 [2023-11-06 22:33:23,119 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 22:33:23,291 INFO L124 PetriNetUnfolderBase]: 199/321 cut-off events. [2023-11-06 22:33:23,291 INFO L125 PetriNetUnfolderBase]: For 1130/1146 co-relation queries the response was YES. [2023-11-06 22:33:23,293 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1341 conditions, 321 events. 199/321 cut-off events. For 1130/1146 co-relation queries the response was YES. Maximal size of possible extension queue 25. Compared 999 event pairs, 28 based on Foata normal form. 28/348 useless extension candidates. Maximal degree in co-relation 1190. Up to 136 conditions per place. [2023-11-06 22:33:23,296 INFO L140 encePairwiseOnDemand]: 173/178 looper letters, 41 selfloop transitions, 6 changer transitions 0/49 dead transitions. [2023-11-06 22:33:23,296 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 50 places, 49 transitions, 372 flow [2023-11-06 22:33:23,297 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-06 22:33:23,299 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-11-06 22:33:23,301 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 477 transitions. [2023-11-06 22:33:23,302 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5359550561797752 [2023-11-06 22:33:23,302 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 477 transitions. [2023-11-06 22:33:23,302 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 477 transitions. [2023-11-06 22:33:23,302 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 22:33:23,303 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 477 transitions. [2023-11-06 22:33:23,305 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 95.4) internal successors, (477), 5 states have internal predecessors, (477), 0 states have call successors, (0), 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 22:33:23,307 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 178.0) internal successors, (1068), 6 states have internal predecessors, (1068), 0 states have call successors, (0), 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 22:33:23,308 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 178.0) internal successors, (1068), 6 states have internal predecessors, (1068), 0 states have call successors, (0), 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 22:33:23,308 INFO L175 Difference]: Start difference. First operand has 52 places, 30 transitions, 168 flow. Second operand 5 states and 477 transitions. [2023-11-06 22:33:23,308 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 50 places, 49 transitions, 372 flow [2023-11-06 22:33:23,313 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 43 places, 49 transitions, 344 flow, removed 10 selfloop flow, removed 7 redundant places. [2023-11-06 22:33:23,314 INFO L231 Difference]: Finished difference. Result has 44 places, 31 transitions, 173 flow [2023-11-06 22:33:23,315 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=178, PETRI_DIFFERENCE_MINUEND_FLOW=152, PETRI_DIFFERENCE_MINUEND_PLACES=39, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=30, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=24, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=173, PETRI_PLACES=44, PETRI_TRANSITIONS=31} [2023-11-06 22:33:23,317 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 14 predicate places. [2023-11-06 22:33:23,317 INFO L495 AbstractCegarLoop]: Abstraction has has 44 places, 31 transitions, 173 flow [2023-11-06 22:33:23,318 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 91.75) internal successors, (367), 4 states have internal predecessors, (367), 0 states have call successors, (0), 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 22:33:23,318 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 22:33:23,318 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 22:33:23,328 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_359d5117-3c4b-41d6-9bce-ea2e82d16c2e/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-11-06 22:33:23,526 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_359d5117-3c4b-41d6-9bce-ea2e82d16c2e/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:33:23,526 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-11-06 22:33:23,527 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:33:23,527 INFO L85 PathProgramCache]: Analyzing trace with hash 436588632, now seen corresponding path program 2 times [2023-11-06 22:33:23,527 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:33:23,527 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1581607338] [2023-11-06 22:33:23,528 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:33:23,528 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:33:23,557 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:33:23,740 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:33:23,741 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:33:23,741 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1581607338] [2023-11-06 22:33:23,741 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1581607338] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-06 22:33:23,741 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-06 22:33:23,742 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-11-06 22:33:23,742 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1278387235] [2023-11-06 22:33:23,742 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 22:33:23,742 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-11-06 22:33:23,743 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:33:23,743 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-11-06 22:33:23,743 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2023-11-06 22:33:23,827 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 79 out of 178 [2023-11-06 22:33:23,828 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 44 places, 31 transitions, 173 flow. Second operand has 6 states, 6 states have (on average 82.16666666666667) internal successors, (493), 6 states have internal predecessors, (493), 0 states have call successors, (0), 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 22:33:23,828 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 22:33:23,829 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 79 of 178 [2023-11-06 22:33:23,829 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 22:33:24,086 INFO L124 PetriNetUnfolderBase]: 342/560 cut-off events. [2023-11-06 22:33:24,086 INFO L125 PetriNetUnfolderBase]: For 1697/1713 co-relation queries the response was YES. [2023-11-06 22:33:24,089 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2313 conditions, 560 events. 342/560 cut-off events. For 1697/1713 co-relation queries the response was YES. Maximal size of possible extension queue 44. Compared 2085 event pairs, 19 based on Foata normal form. 36/591 useless extension candidates. Maximal degree in co-relation 1965. Up to 308 conditions per place. [2023-11-06 22:33:24,093 INFO L140 encePairwiseOnDemand]: 171/178 looper letters, 39 selfloop transitions, 5 changer transitions 38/84 dead transitions. [2023-11-06 22:33:24,094 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 51 places, 84 transitions, 643 flow [2023-11-06 22:33:24,094 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-11-06 22:33:24,094 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2023-11-06 22:33:24,097 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 705 transitions. [2023-11-06 22:33:24,098 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.49508426966292135 [2023-11-06 22:33:24,098 INFO L72 ComplementDD]: Start complementDD. Operand 8 states and 705 transitions. [2023-11-06 22:33:24,098 INFO L73 IsDeterministic]: Start isDeterministic. Operand 8 states and 705 transitions. [2023-11-06 22:33:24,099 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 22:33:24,099 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 8 states and 705 transitions. [2023-11-06 22:33:24,101 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 9 states, 8 states have (on average 88.125) internal successors, (705), 8 states have internal predecessors, (705), 0 states have call successors, (0), 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 22:33:24,105 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 9 states, 9 states have (on average 178.0) internal successors, (1602), 9 states have internal predecessors, (1602), 0 states have call successors, (0), 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 22:33:24,106 INFO L81 ComplementDD]: Finished complementDD. Result has 9 states, 9 states have (on average 178.0) internal successors, (1602), 9 states have internal predecessors, (1602), 0 states have call successors, (0), 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 22:33:24,106 INFO L175 Difference]: Start difference. First operand has 44 places, 31 transitions, 173 flow. Second operand 8 states and 705 transitions. [2023-11-06 22:33:24,106 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 51 places, 84 transitions, 643 flow [2023-11-06 22:33:24,111 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 48 places, 84 transitions, 626 flow, removed 0 selfloop flow, removed 3 redundant places. [2023-11-06 22:33:24,113 INFO L231 Difference]: Finished difference. Result has 53 places, 33 transitions, 225 flow [2023-11-06 22:33:24,113 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=178, PETRI_DIFFERENCE_MINUEND_FLOW=164, PETRI_DIFFERENCE_MINUEND_PLACES=41, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=31, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=26, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=225, PETRI_PLACES=53, PETRI_TRANSITIONS=33} [2023-11-06 22:33:24,114 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 23 predicate places. [2023-11-06 22:33:24,114 INFO L495 AbstractCegarLoop]: Abstraction has has 53 places, 33 transitions, 225 flow [2023-11-06 22:33:24,114 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 82.16666666666667) internal successors, (493), 6 states have internal predecessors, (493), 0 states have call successors, (0), 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 22:33:24,114 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 22:33:24,115 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 22:33:24,115 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2023-11-06 22:33:24,115 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-11-06 22:33:24,116 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:33:24,116 INFO L85 PathProgramCache]: Analyzing trace with hash -1012889070, now seen corresponding path program 1 times [2023-11-06 22:33:24,116 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:33:24,116 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1527472427] [2023-11-06 22:33:24,116 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:33:24,117 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:33:24,134 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:33:24,327 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:33:24,328 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:33:24,328 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1527472427] [2023-11-06 22:33:24,328 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1527472427] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-06 22:33:24,328 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-06 22:33:24,328 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-11-06 22:33:24,329 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1482528322] [2023-11-06 22:33:24,329 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 22:33:24,329 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-11-06 22:33:24,330 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:33:24,330 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-11-06 22:33:24,330 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2023-11-06 22:33:24,397 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 79 out of 178 [2023-11-06 22:33:24,398 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 53 places, 33 transitions, 225 flow. Second operand has 6 states, 6 states have (on average 82.16666666666667) internal successors, (493), 6 states have internal predecessors, (493), 0 states have call successors, (0), 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 22:33:24,398 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 22:33:24,399 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 79 of 178 [2023-11-06 22:33:24,399 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 22:33:24,642 INFO L124 PetriNetUnfolderBase]: 350/573 cut-off events. [2023-11-06 22:33:24,642 INFO L125 PetriNetUnfolderBase]: For 3738/3776 co-relation queries the response was YES. [2023-11-06 22:33:24,646 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2917 conditions, 573 events. 350/573 cut-off events. For 3738/3776 co-relation queries the response was YES. Maximal size of possible extension queue 45. Compared 2097 event pairs, 31 based on Foata normal form. 41/604 useless extension candidates. Maximal degree in co-relation 2507. Up to 327 conditions per place. [2023-11-06 22:33:24,651 INFO L140 encePairwiseOnDemand]: 171/178 looper letters, 39 selfloop transitions, 5 changer transitions 28/74 dead transitions. [2023-11-06 22:33:24,651 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 56 places, 74 transitions, 686 flow [2023-11-06 22:33:24,652 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-11-06 22:33:24,652 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2023-11-06 22:33:24,654 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 695 transitions. [2023-11-06 22:33:24,655 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.488061797752809 [2023-11-06 22:33:24,655 INFO L72 ComplementDD]: Start complementDD. Operand 8 states and 695 transitions. [2023-11-06 22:33:24,655 INFO L73 IsDeterministic]: Start isDeterministic. Operand 8 states and 695 transitions. [2023-11-06 22:33:24,656 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 22:33:24,656 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 8 states and 695 transitions. [2023-11-06 22:33:24,659 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 9 states, 8 states have (on average 86.875) internal successors, (695), 8 states have internal predecessors, (695), 0 states have call successors, (0), 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 22:33:24,662 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 9 states, 9 states have (on average 178.0) internal successors, (1602), 9 states have internal predecessors, (1602), 0 states have call successors, (0), 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 22:33:24,663 INFO L81 ComplementDD]: Finished complementDD. Result has 9 states, 9 states have (on average 178.0) internal successors, (1602), 9 states have internal predecessors, (1602), 0 states have call successors, (0), 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 22:33:24,663 INFO L175 Difference]: Start difference. First operand has 53 places, 33 transitions, 225 flow. Second operand 8 states and 695 transitions. [2023-11-06 22:33:24,664 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 56 places, 74 transitions, 686 flow [2023-11-06 22:33:24,674 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 50 places, 74 transitions, 583 flow, removed 48 selfloop flow, removed 6 redundant places. [2023-11-06 22:33:24,676 INFO L231 Difference]: Finished difference. Result has 55 places, 35 transitions, 247 flow [2023-11-06 22:33:24,676 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=178, PETRI_DIFFERENCE_MINUEND_FLOW=186, PETRI_DIFFERENCE_MINUEND_PLACES=43, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=33, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=28, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=247, PETRI_PLACES=55, PETRI_TRANSITIONS=35} [2023-11-06 22:33:24,677 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 25 predicate places. [2023-11-06 22:33:24,677 INFO L495 AbstractCegarLoop]: Abstraction has has 55 places, 35 transitions, 247 flow [2023-11-06 22:33:24,678 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 82.16666666666667) internal successors, (493), 6 states have internal predecessors, (493), 0 states have call successors, (0), 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 22:33:24,678 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 22:33:24,678 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 22:33:24,678 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2023-11-06 22:33:24,679 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-11-06 22:33:24,679 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:33:24,679 INFO L85 PathProgramCache]: Analyzing trace with hash 812996853, now seen corresponding path program 1 times [2023-11-06 22:33:24,679 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:33:24,680 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [853485509] [2023-11-06 22:33:24,680 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:33:24,680 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:33:24,700 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:33:24,950 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:33:24,950 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:33:24,951 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [853485509] [2023-11-06 22:33:24,951 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [853485509] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-06 22:33:24,951 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1857391155] [2023-11-06 22:33:24,951 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:33:24,951 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:33:24,952 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_359d5117-3c4b-41d6-9bce-ea2e82d16c2e/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 22:33:24,953 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_359d5117-3c4b-41d6-9bce-ea2e82d16c2e/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 22:33:24,966 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_359d5117-3c4b-41d6-9bce-ea2e82d16c2e/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-11-06 22:33:25,056 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:33:25,057 INFO L262 TraceCheckSpWp]: Trace formula consists of 148 conjuncts, 8 conjunts are in the unsatisfiable core [2023-11-06 22:33:25,060 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 22:33:25,239 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:33:25,239 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 22:33:25,769 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:33:25,769 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1857391155] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-06 22:33:25,769 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-06 22:33:25,770 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 15 [2023-11-06 22:33:25,770 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1076975600] [2023-11-06 22:33:25,770 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-06 22:33:25,771 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2023-11-06 22:33:25,772 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:33:25,772 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2023-11-06 22:33:25,773 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=186, Unknown=0, NotChecked=0, Total=240 [2023-11-06 22:33:25,980 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 72 out of 178 [2023-11-06 22:33:25,982 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 55 places, 35 transitions, 247 flow. Second operand has 16 states, 16 states have (on average 75.0625) internal successors, (1201), 16 states have internal predecessors, (1201), 0 states have call successors, (0), 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 22:33:25,982 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 22:33:25,982 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 72 of 178 [2023-11-06 22:33:25,982 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 22:33:27,335 INFO L124 PetriNetUnfolderBase]: 637/1029 cut-off events. [2023-11-06 22:33:27,335 INFO L125 PetriNetUnfolderBase]: For 6926/6952 co-relation queries the response was YES. [2023-11-06 22:33:27,341 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5342 conditions, 1029 events. 637/1029 cut-off events. For 6926/6952 co-relation queries the response was YES. Maximal size of possible extension queue 70. Compared 4352 event pairs, 10 based on Foata normal form. 68/1096 useless extension candidates. Maximal degree in co-relation 4948. Up to 383 conditions per place. [2023-11-06 22:33:27,349 INFO L140 encePairwiseOnDemand]: 170/178 looper letters, 88 selfloop transitions, 37 changer transitions 117/244 dead transitions. [2023-11-06 22:33:27,349 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 82 places, 244 transitions, 2236 flow [2023-11-06 22:33:27,349 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2023-11-06 22:33:27,350 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2023-11-06 22:33:27,358 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 2533 transitions. [2023-11-06 22:33:27,360 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44469803370786515 [2023-11-06 22:33:27,361 INFO L72 ComplementDD]: Start complementDD. Operand 32 states and 2533 transitions. [2023-11-06 22:33:27,361 INFO L73 IsDeterministic]: Start isDeterministic. Operand 32 states and 2533 transitions. [2023-11-06 22:33:27,363 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 22:33:27,364 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 32 states and 2533 transitions. [2023-11-06 22:33:27,372 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 33 states, 32 states have (on average 79.15625) internal successors, (2533), 32 states have internal predecessors, (2533), 0 states have call successors, (0), 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 22:33:27,385 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 33 states, 33 states have (on average 178.0) internal successors, (5874), 33 states have internal predecessors, (5874), 0 states have call successors, (0), 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 22:33:27,388 INFO L81 ComplementDD]: Finished complementDD. Result has 33 states, 33 states have (on average 178.0) internal successors, (5874), 33 states have internal predecessors, (5874), 0 states have call successors, (0), 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 22:33:27,388 INFO L175 Difference]: Start difference. First operand has 55 places, 35 transitions, 247 flow. Second operand 32 states and 2533 transitions. [2023-11-06 22:33:27,388 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 82 places, 244 transitions, 2236 flow [2023-11-06 22:33:27,403 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 78 places, 244 transitions, 2136 flow, removed 45 selfloop flow, removed 4 redundant places. [2023-11-06 22:33:27,407 INFO L231 Difference]: Finished difference. Result has 94 places, 65 transitions, 680 flow [2023-11-06 22:33:27,407 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=178, PETRI_DIFFERENCE_MINUEND_FLOW=216, PETRI_DIFFERENCE_MINUEND_PLACES=47, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=35, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=15, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=19, PETRI_DIFFERENCE_SUBTRAHEND_STATES=32, PETRI_FLOW=680, PETRI_PLACES=94, PETRI_TRANSITIONS=65} [2023-11-06 22:33:27,408 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 64 predicate places. [2023-11-06 22:33:27,408 INFO L495 AbstractCegarLoop]: Abstraction has has 94 places, 65 transitions, 680 flow [2023-11-06 22:33:27,409 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 75.0625) internal successors, (1201), 16 states have internal predecessors, (1201), 0 states have call successors, (0), 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 22:33:27,409 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 22:33:27,410 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 22:33:27,421 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_359d5117-3c4b-41d6-9bce-ea2e82d16c2e/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-11-06 22:33:27,615 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_359d5117-3c4b-41d6-9bce-ea2e82d16c2e/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:33:27,616 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-11-06 22:33:27,616 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:33:27,616 INFO L85 PathProgramCache]: Analyzing trace with hash -118296533, now seen corresponding path program 2 times [2023-11-06 22:33:27,617 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:33:27,617 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1024761649] [2023-11-06 22:33:27,617 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:33:27,617 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:33:27,640 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:33:27,905 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:33:27,905 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:33:27,905 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1024761649] [2023-11-06 22:33:27,906 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1024761649] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-06 22:33:27,906 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1150843613] [2023-11-06 22:33:27,906 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-06 22:33:27,906 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:33:27,906 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_359d5117-3c4b-41d6-9bce-ea2e82d16c2e/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 22:33:27,908 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_359d5117-3c4b-41d6-9bce-ea2e82d16c2e/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 22:33:27,935 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_359d5117-3c4b-41d6-9bce-ea2e82d16c2e/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-11-06 22:33:28,016 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-11-06 22:33:28,016 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-06 22:33:28,018 INFO L262 TraceCheckSpWp]: Trace formula consists of 148 conjuncts, 10 conjunts are in the unsatisfiable core [2023-11-06 22:33:28,020 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 22:33:28,136 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:33:28,137 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 22:33:28,307 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:33:28,308 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1150843613] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-06 22:33:28,308 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-06 22:33:28,308 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7, 6] total 15 [2023-11-06 22:33:28,308 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1531598726] [2023-11-06 22:33:28,309 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-06 22:33:28,309 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2023-11-06 22:33:28,310 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:33:28,310 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2023-11-06 22:33:28,310 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=188, Unknown=0, NotChecked=0, Total=240 [2023-11-06 22:33:28,462 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 77 out of 178 [2023-11-06 22:33:28,464 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 94 places, 65 transitions, 680 flow. Second operand has 16 states, 16 states have (on average 80.0625) internal successors, (1281), 16 states have internal predecessors, (1281), 0 states have call successors, (0), 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 22:33:28,464 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 22:33:28,464 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 77 of 178 [2023-11-06 22:33:28,465 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 22:33:30,042 INFO L124 PetriNetUnfolderBase]: 964/1586 cut-off events. [2023-11-06 22:33:30,042 INFO L125 PetriNetUnfolderBase]: For 20527/20569 co-relation queries the response was YES. [2023-11-06 22:33:30,049 INFO L83 FinitePrefix]: Finished finitePrefix Result has 10052 conditions, 1586 events. 964/1586 cut-off events. For 20527/20569 co-relation queries the response was YES. Maximal size of possible extension queue 81. Compared 7313 event pairs, 16 based on Foata normal form. 96/1679 useless extension candidates. Maximal degree in co-relation 9431. Up to 563 conditions per place. [2023-11-06 22:33:30,062 INFO L140 encePairwiseOnDemand]: 171/178 looper letters, 130 selfloop transitions, 70 changer transitions 165/366 dead transitions. [2023-11-06 22:33:30,063 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 119 places, 366 transitions, 4434 flow [2023-11-06 22:33:30,063 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2023-11-06 22:33:30,063 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 41 states. [2023-11-06 22:33:30,075 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 3459 transitions. [2023-11-06 22:33:30,078 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4739654699917786 [2023-11-06 22:33:30,078 INFO L72 ComplementDD]: Start complementDD. Operand 41 states and 3459 transitions. [2023-11-06 22:33:30,078 INFO L73 IsDeterministic]: Start isDeterministic. Operand 41 states and 3459 transitions. [2023-11-06 22:33:30,081 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 22:33:30,082 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 41 states and 3459 transitions. [2023-11-06 22:33:30,092 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 42 states, 41 states have (on average 84.36585365853658) internal successors, (3459), 41 states have internal predecessors, (3459), 0 states have call successors, (0), 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 22:33:30,109 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 42 states, 42 states have (on average 178.0) internal successors, (7476), 42 states have internal predecessors, (7476), 0 states have call successors, (0), 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 22:33:30,112 INFO L81 ComplementDD]: Finished complementDD. Result has 42 states, 42 states have (on average 178.0) internal successors, (7476), 42 states have internal predecessors, (7476), 0 states have call successors, (0), 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 22:33:30,112 INFO L175 Difference]: Start difference. First operand has 94 places, 65 transitions, 680 flow. Second operand 41 states and 3459 transitions. [2023-11-06 22:33:30,113 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 119 places, 366 transitions, 4434 flow [2023-11-06 22:33:30,179 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 102 places, 366 transitions, 3100 flow, removed 647 selfloop flow, removed 17 redundant places. [2023-11-06 22:33:30,184 INFO L231 Difference]: Finished difference. Result has 117 places, 112 transitions, 954 flow [2023-11-06 22:33:30,184 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=178, PETRI_DIFFERENCE_MINUEND_FLOW=382, PETRI_DIFFERENCE_MINUEND_PLACES=62, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=65, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=31, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=28, PETRI_DIFFERENCE_SUBTRAHEND_STATES=41, PETRI_FLOW=954, PETRI_PLACES=117, PETRI_TRANSITIONS=112} [2023-11-06 22:33:30,185 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 87 predicate places. [2023-11-06 22:33:30,185 INFO L495 AbstractCegarLoop]: Abstraction has has 117 places, 112 transitions, 954 flow [2023-11-06 22:33:30,187 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 80.0625) internal successors, (1281), 16 states have internal predecessors, (1281), 0 states have call successors, (0), 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 22:33:30,187 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 22:33:30,188 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 22:33:30,195 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_359d5117-3c4b-41d6-9bce-ea2e82d16c2e/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2023-11-06 22:33:30,393 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_359d5117-3c4b-41d6-9bce-ea2e82d16c2e/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2023-11-06 22:33:30,394 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-11-06 22:33:30,394 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:33:30,394 INFO L85 PathProgramCache]: Analyzing trace with hash -777199938, now seen corresponding path program 3 times [2023-11-06 22:33:30,394 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:33:30,394 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1969904151] [2023-11-06 22:33:30,394 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:33:30,395 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:33:30,429 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:33:30,856 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:33:30,856 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:33:30,856 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1969904151] [2023-11-06 22:33:30,857 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1969904151] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-06 22:33:30,857 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1978256852] [2023-11-06 22:33:30,857 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-11-06 22:33:30,857 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:33:30,857 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_359d5117-3c4b-41d6-9bce-ea2e82d16c2e/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 22:33:30,860 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_359d5117-3c4b-41d6-9bce-ea2e82d16c2e/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 22:33:30,895 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_359d5117-3c4b-41d6-9bce-ea2e82d16c2e/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-11-06 22:33:30,984 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2023-11-06 22:33:30,985 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-06 22:33:30,986 INFO L262 TraceCheckSpWp]: Trace formula consists of 154 conjuncts, 13 conjunts are in the unsatisfiable core [2023-11-06 22:33:30,988 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 22:33:31,153 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:33:31,153 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 22:33:31,452 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-06 22:33:31,452 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1978256852] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-06 22:33:31,452 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-06 22:33:31,452 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9, 6] total 19 [2023-11-06 22:33:31,453 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1793862436] [2023-11-06 22:33:31,453 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-06 22:33:31,454 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2023-11-06 22:33:31,455 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:33:31,456 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2023-11-06 22:33:31,456 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=304, Unknown=0, NotChecked=0, Total=380 [2023-11-06 22:33:31,619 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 77 out of 178 [2023-11-06 22:33:31,621 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 117 places, 112 transitions, 954 flow. Second operand has 20 states, 20 states have (on average 79.7) internal successors, (1594), 20 states have internal predecessors, (1594), 0 states have call successors, (0), 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 22:33:31,621 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 22:33:31,621 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 77 of 178 [2023-11-06 22:33:31,622 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 22:33:33,099 INFO L124 PetriNetUnfolderBase]: 973/1595 cut-off events. [2023-11-06 22:33:33,100 INFO L125 PetriNetUnfolderBase]: For 11360/11387 co-relation queries the response was YES. [2023-11-06 22:33:33,107 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8419 conditions, 1595 events. 973/1595 cut-off events. For 11360/11387 co-relation queries the response was YES. Maximal size of possible extension queue 76. Compared 7235 event pairs, 16 based on Foata normal form. 50/1644 useless extension candidates. Maximal degree in co-relation 7265. Up to 516 conditions per place. [2023-11-06 22:33:33,120 INFO L140 encePairwiseOnDemand]: 171/178 looper letters, 160 selfloop transitions, 60 changer transitions 95/320 dead transitions. [2023-11-06 22:33:33,120 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 127 places, 320 transitions, 3658 flow [2023-11-06 22:33:33,121 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2023-11-06 22:33:33,121 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 31 states. [2023-11-06 22:33:33,125 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 2578 transitions. [2023-11-06 22:33:33,127 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4671982602392171 [2023-11-06 22:33:33,128 INFO L72 ComplementDD]: Start complementDD. Operand 31 states and 2578 transitions. [2023-11-06 22:33:33,128 INFO L73 IsDeterministic]: Start isDeterministic. Operand 31 states and 2578 transitions. [2023-11-06 22:33:33,129 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 22:33:33,129 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 31 states and 2578 transitions. [2023-11-06 22:33:33,135 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 32 states, 31 states have (on average 83.16129032258064) internal successors, (2578), 31 states have internal predecessors, (2578), 0 states have call successors, (0), 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 22:33:33,145 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 32 states, 32 states have (on average 178.0) internal successors, (5696), 32 states have internal predecessors, (5696), 0 states have call successors, (0), 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 22:33:33,148 INFO L81 ComplementDD]: Finished complementDD. Result has 32 states, 32 states have (on average 178.0) internal successors, (5696), 32 states have internal predecessors, (5696), 0 states have call successors, (0), 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 22:33:33,148 INFO L175 Difference]: Start difference. First operand has 117 places, 112 transitions, 954 flow. Second operand 31 states and 2578 transitions. [2023-11-06 22:33:33,148 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 127 places, 320 transitions, 3658 flow [2023-11-06 22:33:33,189 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 108 places, 320 transitions, 2916 flow, removed 326 selfloop flow, removed 19 redundant places. [2023-11-06 22:33:33,194 INFO L231 Difference]: Finished difference. Result has 118 places, 146 transitions, 1266 flow [2023-11-06 22:33:33,195 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=178, PETRI_DIFFERENCE_MINUEND_FLOW=777, PETRI_DIFFERENCE_MINUEND_PLACES=78, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=112, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=31, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=76, PETRI_DIFFERENCE_SUBTRAHEND_STATES=31, PETRI_FLOW=1266, PETRI_PLACES=118, PETRI_TRANSITIONS=146} [2023-11-06 22:33:33,195 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 88 predicate places. [2023-11-06 22:33:33,195 INFO L495 AbstractCegarLoop]: Abstraction has has 118 places, 146 transitions, 1266 flow [2023-11-06 22:33:33,196 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 79.7) internal successors, (1594), 20 states have internal predecessors, (1594), 0 states have call successors, (0), 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 22:33:33,196 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 22:33:33,197 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 22:33:33,207 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_359d5117-3c4b-41d6-9bce-ea2e82d16c2e/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2023-11-06 22:33:33,407 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_359d5117-3c4b-41d6-9bce-ea2e82d16c2e/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2023-11-06 22:33:33,408 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-11-06 22:33:33,408 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:33:33,408 INFO L85 PathProgramCache]: Analyzing trace with hash -283918928, now seen corresponding path program 2 times [2023-11-06 22:33:33,408 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:33:33,408 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [174336593] [2023-11-06 22:33:33,408 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:33:33,409 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:33:33,443 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:33:33,754 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:33:33,754 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:33:33,755 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [174336593] [2023-11-06 22:33:33,755 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [174336593] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-06 22:33:33,755 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2088339077] [2023-11-06 22:33:33,755 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-06 22:33:33,755 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:33:33,756 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_359d5117-3c4b-41d6-9bce-ea2e82d16c2e/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 22:33:33,759 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_359d5117-3c4b-41d6-9bce-ea2e82d16c2e/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 22:33:33,789 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_359d5117-3c4b-41d6-9bce-ea2e82d16c2e/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-11-06 22:33:33,857 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-11-06 22:33:33,857 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-06 22:33:33,858 INFO L262 TraceCheckSpWp]: Trace formula consists of 154 conjuncts, 14 conjunts are in the unsatisfiable core [2023-11-06 22:33:33,860 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 22:33:34,033 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:33:34,034 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 22:33:34,461 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:33:34,462 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2088339077] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-06 22:33:34,462 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-06 22:33:34,462 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 8, 9] total 21 [2023-11-06 22:33:34,464 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [349703911] [2023-11-06 22:33:34,465 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-06 22:33:34,465 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2023-11-06 22:33:34,467 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:33:34,467 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2023-11-06 22:33:34,468 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=96, Invalid=366, Unknown=0, NotChecked=0, Total=462 [2023-11-06 22:33:34,671 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 68 out of 178 [2023-11-06 22:33:34,673 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 118 places, 146 transitions, 1266 flow. Second operand has 22 states, 22 states have (on average 70.63636363636364) internal successors, (1554), 22 states have internal predecessors, (1554), 0 states have call successors, (0), 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 22:33:34,673 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 22:33:34,673 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 68 of 178 [2023-11-06 22:33:34,673 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 22:33:39,966 INFO L124 PetriNetUnfolderBase]: 2257/3626 cut-off events. [2023-11-06 22:33:39,967 INFO L125 PetriNetUnfolderBase]: For 16792/16792 co-relation queries the response was YES. [2023-11-06 22:33:39,981 INFO L83 FinitePrefix]: Finished finitePrefix Result has 18178 conditions, 3626 events. 2257/3626 cut-off events. For 16792/16792 co-relation queries the response was YES. Maximal size of possible extension queue 164. Compared 18544 event pairs, 35 based on Foata normal form. 194/3820 useless extension candidates. Maximal degree in co-relation 16593. Up to 740 conditions per place. [2023-11-06 22:33:40,008 INFO L140 encePairwiseOnDemand]: 169/178 looper letters, 281 selfloop transitions, 295 changer transitions 272/848 dead transitions. [2023-11-06 22:33:40,008 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 204 places, 848 transitions, 8621 flow [2023-11-06 22:33:40,009 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 101 states. [2023-11-06 22:33:40,009 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 101 states. [2023-11-06 22:33:40,020 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 101 states to 101 states and 7452 transitions. [2023-11-06 22:33:40,026 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.414506619201246 [2023-11-06 22:33:40,026 INFO L72 ComplementDD]: Start complementDD. Operand 101 states and 7452 transitions. [2023-11-06 22:33:40,027 INFO L73 IsDeterministic]: Start isDeterministic. Operand 101 states and 7452 transitions. [2023-11-06 22:33:40,031 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 22:33:40,031 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 101 states and 7452 transitions. [2023-11-06 22:33:40,047 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 102 states, 101 states have (on average 73.78217821782178) internal successors, (7452), 101 states have internal predecessors, (7452), 0 states have call successors, (0), 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 22:33:40,077 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 102 states, 102 states have (on average 178.0) internal successors, (18156), 102 states have internal predecessors, (18156), 0 states have call successors, (0), 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 22:33:40,083 INFO L81 ComplementDD]: Finished complementDD. Result has 102 states, 102 states have (on average 178.0) internal successors, (18156), 102 states have internal predecessors, (18156), 0 states have call successors, (0), 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 22:33:40,083 INFO L175 Difference]: Start difference. First operand has 118 places, 146 transitions, 1266 flow. Second operand 101 states and 7452 transitions. [2023-11-06 22:33:40,083 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 204 places, 848 transitions, 8621 flow [2023-11-06 22:33:40,238 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 192 places, 848 transitions, 7595 flow, removed 384 selfloop flow, removed 12 redundant places. [2023-11-06 22:33:40,251 INFO L231 Difference]: Finished difference. Result has 230 places, 370 transitions, 3720 flow [2023-11-06 22:33:40,251 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=178, PETRI_DIFFERENCE_MINUEND_FLOW=1114, PETRI_DIFFERENCE_MINUEND_PLACES=92, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=146, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=98, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=40, PETRI_DIFFERENCE_SUBTRAHEND_STATES=101, PETRI_FLOW=3720, PETRI_PLACES=230, PETRI_TRANSITIONS=370} [2023-11-06 22:33:40,252 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 200 predicate places. [2023-11-06 22:33:40,252 INFO L495 AbstractCegarLoop]: Abstraction has has 230 places, 370 transitions, 3720 flow [2023-11-06 22:33:40,253 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 70.63636363636364) internal successors, (1554), 22 states have internal predecessors, (1554), 0 states have call successors, (0), 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 22:33:40,253 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 22:33:40,254 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 22:33:40,264 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_359d5117-3c4b-41d6-9bce-ea2e82d16c2e/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2023-11-06 22:33:40,459 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_359d5117-3c4b-41d6-9bce-ea2e82d16c2e/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:33:40,459 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-11-06 22:33:40,460 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:33:40,460 INFO L85 PathProgramCache]: Analyzing trace with hash 1171575895, now seen corresponding path program 3 times [2023-11-06 22:33:40,460 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:33:40,460 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1054206104] [2023-11-06 22:33:40,460 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:33:40,461 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:33:40,481 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:33:40,914 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 5 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:33:40,914 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:33:40,914 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1054206104] [2023-11-06 22:33:40,914 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1054206104] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-06 22:33:40,915 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [279447362] [2023-11-06 22:33:40,915 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-11-06 22:33:40,915 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:33:40,915 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_359d5117-3c4b-41d6-9bce-ea2e82d16c2e/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 22:33:40,917 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_359d5117-3c4b-41d6-9bce-ea2e82d16c2e/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 22:33:40,939 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_359d5117-3c4b-41d6-9bce-ea2e82d16c2e/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2023-11-06 22:33:41,053 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2023-11-06 22:33:41,053 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-06 22:33:41,055 INFO L262 TraceCheckSpWp]: Trace formula consists of 160 conjuncts, 12 conjunts are in the unsatisfiable core [2023-11-06 22:33:41,058 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 22:33:41,313 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:33:41,313 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 22:33:41,848 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-06 22:33:41,849 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [279447362] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-06 22:33:41,849 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-06 22:33:41,849 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9, 8] total 22 [2023-11-06 22:33:41,849 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1931253844] [2023-11-06 22:33:41,850 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-06 22:33:41,850 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2023-11-06 22:33:41,851 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:33:41,851 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2023-11-06 22:33:41,852 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=115, Invalid=391, Unknown=0, NotChecked=0, Total=506 [2023-11-06 22:33:42,094 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 69 out of 178 [2023-11-06 22:33:42,096 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 230 places, 370 transitions, 3720 flow. Second operand has 23 states, 23 states have (on average 71.8695652173913) internal successors, (1653), 23 states have internal predecessors, (1653), 0 states have call successors, (0), 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 22:33:42,096 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 22:33:42,096 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 69 of 178 [2023-11-06 22:33:42,096 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 22:33:44,544 INFO L124 PetriNetUnfolderBase]: 2072/3329 cut-off events. [2023-11-06 22:33:44,544 INFO L125 PetriNetUnfolderBase]: For 45716/45716 co-relation queries the response was YES. [2023-11-06 22:33:44,564 INFO L83 FinitePrefix]: Finished finitePrefix Result has 19041 conditions, 3329 events. 2072/3329 cut-off events. For 45716/45716 co-relation queries the response was YES. Maximal size of possible extension queue 129. Compared 16521 event pairs, 67 based on Foata normal form. 68/3397 useless extension candidates. Maximal degree in co-relation 18510. Up to 1249 conditions per place. [2023-11-06 22:33:44,587 INFO L140 encePairwiseOnDemand]: 169/178 looper letters, 352 selfloop transitions, 151 changer transitions 138/641 dead transitions. [2023-11-06 22:33:44,588 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 240 places, 641 transitions, 7125 flow [2023-11-06 22:33:44,588 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2023-11-06 22:33:44,588 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 50 states. [2023-11-06 22:33:44,593 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 3744 transitions. [2023-11-06 22:33:44,595 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42067415730337077 [2023-11-06 22:33:44,595 INFO L72 ComplementDD]: Start complementDD. Operand 50 states and 3744 transitions. [2023-11-06 22:33:44,595 INFO L73 IsDeterministic]: Start isDeterministic. Operand 50 states and 3744 transitions. [2023-11-06 22:33:44,597 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 22:33:44,597 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 50 states and 3744 transitions. [2023-11-06 22:33:44,604 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 51 states, 50 states have (on average 74.88) internal successors, (3744), 50 states have internal predecessors, (3744), 0 states have call successors, (0), 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 22:33:44,616 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 51 states, 51 states have (on average 178.0) internal successors, (9078), 51 states have internal predecessors, (9078), 0 states have call successors, (0), 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 22:33:44,619 INFO L81 ComplementDD]: Finished complementDD. Result has 51 states, 51 states have (on average 178.0) internal successors, (9078), 51 states have internal predecessors, (9078), 0 states have call successors, (0), 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 22:33:44,619 INFO L175 Difference]: Start difference. First operand has 230 places, 370 transitions, 3720 flow. Second operand 50 states and 3744 transitions. [2023-11-06 22:33:44,620 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 240 places, 641 transitions, 7125 flow [2023-11-06 22:33:44,835 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 202 places, 641 transitions, 6150 flow, removed 420 selfloop flow, removed 38 redundant places. [2023-11-06 22:33:44,847 INFO L231 Difference]: Finished difference. Result has 229 places, 402 transitions, 3828 flow [2023-11-06 22:33:44,848 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=178, PETRI_DIFFERENCE_MINUEND_FLOW=3044, PETRI_DIFFERENCE_MINUEND_PLACES=153, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=370, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=111, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=249, PETRI_DIFFERENCE_SUBTRAHEND_STATES=50, PETRI_FLOW=3828, PETRI_PLACES=229, PETRI_TRANSITIONS=402} [2023-11-06 22:33:44,848 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 199 predicate places. [2023-11-06 22:33:44,849 INFO L495 AbstractCegarLoop]: Abstraction has has 229 places, 402 transitions, 3828 flow [2023-11-06 22:33:44,849 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 71.8695652173913) internal successors, (1653), 23 states have internal predecessors, (1653), 0 states have call successors, (0), 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 22:33:44,849 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 22:33:44,850 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 22:33:44,854 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_359d5117-3c4b-41d6-9bce-ea2e82d16c2e/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2023-11-06 22:33:45,051 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_359d5117-3c4b-41d6-9bce-ea2e82d16c2e/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:33:45,052 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-11-06 22:33:45,052 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:33:45,052 INFO L85 PathProgramCache]: Analyzing trace with hash 393626489, now seen corresponding path program 4 times [2023-11-06 22:33:45,052 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:33:45,052 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [964786412] [2023-11-06 22:33:45,053 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:33:45,053 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:33:45,075 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:33:45,509 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 2 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:33:45,509 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:33:45,509 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [964786412] [2023-11-06 22:33:45,510 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [964786412] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-06 22:33:45,510 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [785328981] [2023-11-06 22:33:45,510 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-11-06 22:33:45,510 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:33:45,511 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_359d5117-3c4b-41d6-9bce-ea2e82d16c2e/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 22:33:45,524 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_359d5117-3c4b-41d6-9bce-ea2e82d16c2e/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 22:33:45,543 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_359d5117-3c4b-41d6-9bce-ea2e82d16c2e/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2023-11-06 22:33:45,623 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-11-06 22:33:45,623 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-06 22:33:45,625 INFO L262 TraceCheckSpWp]: Trace formula consists of 160 conjuncts, 14 conjunts are in the unsatisfiable core [2023-11-06 22:33:45,627 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 22:33:45,866 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 2 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:33:45,866 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 22:33:46,173 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 2 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:33:46,173 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [785328981] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-06 22:33:46,173 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-06 22:33:46,174 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 10, 8] total 22 [2023-11-06 22:33:46,174 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [94987642] [2023-11-06 22:33:46,174 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-06 22:33:46,175 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2023-11-06 22:33:46,176 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:33:46,176 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2023-11-06 22:33:46,177 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=102, Invalid=404, Unknown=0, NotChecked=0, Total=506 [2023-11-06 22:33:46,368 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 72 out of 178 [2023-11-06 22:33:46,370 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 229 places, 402 transitions, 3828 flow. Second operand has 23 states, 23 states have (on average 74.65217391304348) internal successors, (1717), 23 states have internal predecessors, (1717), 0 states have call successors, (0), 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 22:33:46,370 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 22:33:46,370 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 72 of 178 [2023-11-06 22:33:46,370 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 22:33:51,334 INFO L124 PetriNetUnfolderBase]: 3824/6204 cut-off events. [2023-11-06 22:33:51,334 INFO L125 PetriNetUnfolderBase]: For 72533/72578 co-relation queries the response was YES. [2023-11-06 22:33:51,363 INFO L83 FinitePrefix]: Finished finitePrefix Result has 36974 conditions, 6204 events. 3824/6204 cut-off events. For 72533/72578 co-relation queries the response was YES. Maximal size of possible extension queue 281. Compared 36002 event pairs, 28 based on Foata normal form. 217/6421 useless extension candidates. Maximal degree in co-relation 35821. Up to 1124 conditions per place. [2023-11-06 22:33:51,397 INFO L140 encePairwiseOnDemand]: 170/178 looper letters, 344 selfloop transitions, 510 changer transitions 468/1327 dead transitions. [2023-11-06 22:33:51,397 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 299 places, 1327 transitions, 16204 flow [2023-11-06 22:33:51,398 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 99 states. [2023-11-06 22:33:51,398 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 99 states. [2023-11-06 22:33:51,410 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 99 states to 99 states and 7682 transitions. [2023-11-06 22:33:51,414 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43593235728067187 [2023-11-06 22:33:51,414 INFO L72 ComplementDD]: Start complementDD. Operand 99 states and 7682 transitions. [2023-11-06 22:33:51,415 INFO L73 IsDeterministic]: Start isDeterministic. Operand 99 states and 7682 transitions. [2023-11-06 22:33:51,420 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 22:33:51,420 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 99 states and 7682 transitions. [2023-11-06 22:33:51,439 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 100 states, 99 states have (on average 77.5959595959596) internal successors, (7682), 99 states have internal predecessors, (7682), 0 states have call successors, (0), 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 22:33:51,464 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 100 states, 100 states have (on average 178.0) internal successors, (17800), 100 states have internal predecessors, (17800), 0 states have call successors, (0), 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 22:33:51,470 INFO L81 ComplementDD]: Finished complementDD. Result has 100 states, 100 states have (on average 178.0) internal successors, (17800), 100 states have internal predecessors, (17800), 0 states have call successors, (0), 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 22:33:51,470 INFO L175 Difference]: Start difference. First operand has 229 places, 402 transitions, 3828 flow. Second operand 99 states and 7682 transitions. [2023-11-06 22:33:51,471 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 299 places, 1327 transitions, 16204 flow [2023-11-06 22:33:51,902 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 270 places, 1327 transitions, 14047 flow, removed 849 selfloop flow, removed 29 redundant places. [2023-11-06 22:33:51,917 INFO L231 Difference]: Finished difference. Result has 323 places, 625 transitions, 7689 flow [2023-11-06 22:33:51,917 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=178, PETRI_DIFFERENCE_MINUEND_FLOW=3573, PETRI_DIFFERENCE_MINUEND_PLACES=172, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=402, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=299, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=71, PETRI_DIFFERENCE_SUBTRAHEND_STATES=99, PETRI_FLOW=7689, PETRI_PLACES=323, PETRI_TRANSITIONS=625} [2023-11-06 22:33:51,918 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 293 predicate places. [2023-11-06 22:33:51,918 INFO L495 AbstractCegarLoop]: Abstraction has has 323 places, 625 transitions, 7689 flow [2023-11-06 22:33:51,918 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 74.65217391304348) internal successors, (1717), 23 states have internal predecessors, (1717), 0 states have call successors, (0), 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 22:33:51,919 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 22:33:51,919 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 22:33:51,924 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_359d5117-3c4b-41d6-9bce-ea2e82d16c2e/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2023-11-06 22:33:52,119 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_359d5117-3c4b-41d6-9bce-ea2e82d16c2e/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2023-11-06 22:33:52,119 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-11-06 22:33:52,120 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:33:52,120 INFO L85 PathProgramCache]: Analyzing trace with hash -270406819, now seen corresponding path program 5 times [2023-11-06 22:33:52,120 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:33:52,120 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2056240630] [2023-11-06 22:33:52,120 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:33:52,121 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:33:52,142 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:33:52,511 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 3 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:33:52,511 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:33:52,512 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2056240630] [2023-11-06 22:33:52,512 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2056240630] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-06 22:33:52,512 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [805883512] [2023-11-06 22:33:52,512 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-11-06 22:33:52,512 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:33:52,513 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_359d5117-3c4b-41d6-9bce-ea2e82d16c2e/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 22:33:52,514 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_359d5117-3c4b-41d6-9bce-ea2e82d16c2e/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 22:33:52,543 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_359d5117-3c4b-41d6-9bce-ea2e82d16c2e/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2023-11-06 22:33:52,624 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2023-11-06 22:33:52,625 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-06 22:33:52,626 INFO L262 TraceCheckSpWp]: Trace formula consists of 160 conjuncts, 19 conjunts are in the unsatisfiable core [2023-11-06 22:33:52,629 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 22:33:52,921 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 3 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:33:52,921 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 22:33:53,384 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 3 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:33:53,384 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [805883512] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-06 22:33:53,384 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-06 22:33:53,385 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 10, 10] total 24 [2023-11-06 22:33:53,385 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1288354109] [2023-11-06 22:33:53,385 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-06 22:33:53,385 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2023-11-06 22:33:53,386 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:33:53,386 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2023-11-06 22:33:53,386 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=128, Invalid=472, Unknown=0, NotChecked=0, Total=600 [2023-11-06 22:33:53,678 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 69 out of 178 [2023-11-06 22:33:53,680 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 323 places, 625 transitions, 7689 flow. Second operand has 25 states, 25 states have (on average 71.48) internal successors, (1787), 25 states have internal predecessors, (1787), 0 states have call successors, (0), 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 22:33:53,680 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 22:33:53,680 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 69 of 178 [2023-11-06 22:33:53,680 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 22:34:07,103 INFO L124 PetriNetUnfolderBase]: 9795/16378 cut-off events. [2023-11-06 22:34:07,103 INFO L125 PetriNetUnfolderBase]: For 335414/335414 co-relation queries the response was YES. [2023-11-06 22:34:07,237 INFO L83 FinitePrefix]: Finished finitePrefix Result has 120261 conditions, 16378 events. 9795/16378 cut-off events. For 335414/335414 co-relation queries the response was YES. Maximal size of possible extension queue 652. Compared 114972 event pairs, 81 based on Foata normal form. 490/16868 useless extension candidates. Maximal degree in co-relation 120003. Up to 3304 conditions per place. [2023-11-06 22:34:07,323 INFO L140 encePairwiseOnDemand]: 168/178 looper letters, 652 selfloop transitions, 1575 changer transitions 983/3210 dead transitions. [2023-11-06 22:34:07,323 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 461 places, 3210 transitions, 48037 flow [2023-11-06 22:34:07,324 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 187 states. [2023-11-06 22:34:07,324 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 187 states. [2023-11-06 22:34:07,338 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 187 states to 187 states and 14010 transitions. [2023-11-06 22:34:07,344 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42089767469807127 [2023-11-06 22:34:07,344 INFO L72 ComplementDD]: Start complementDD. Operand 187 states and 14010 transitions. [2023-11-06 22:34:07,345 INFO L73 IsDeterministic]: Start isDeterministic. Operand 187 states and 14010 transitions. [2023-11-06 22:34:07,349 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 22:34:07,349 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 187 states and 14010 transitions. [2023-11-06 22:34:07,373 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 188 states, 187 states have (on average 74.91978609625669) internal successors, (14010), 187 states have internal predecessors, (14010), 0 states have call successors, (0), 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 22:34:07,406 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 188 states, 188 states have (on average 178.0) internal successors, (33464), 188 states have internal predecessors, (33464), 0 states have call successors, (0), 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 22:34:07,417 INFO L81 ComplementDD]: Finished complementDD. Result has 188 states, 188 states have (on average 178.0) internal successors, (33464), 188 states have internal predecessors, (33464), 0 states have call successors, (0), 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 22:34:07,417 INFO L175 Difference]: Start difference. First operand has 323 places, 625 transitions, 7689 flow. Second operand 187 states and 14010 transitions. [2023-11-06 22:34:07,417 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 461 places, 3210 transitions, 48037 flow [2023-11-06 22:34:11,241 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 416 places, 3210 transitions, 39530 flow, removed 3604 selfloop flow, removed 45 redundant places. [2023-11-06 22:34:11,277 INFO L231 Difference]: Finished difference. Result has 490 places, 1796 transitions, 25883 flow [2023-11-06 22:34:11,278 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=178, PETRI_DIFFERENCE_MINUEND_FLOW=6709, PETRI_DIFFERENCE_MINUEND_PLACES=230, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=625, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=528, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=50, PETRI_DIFFERENCE_SUBTRAHEND_STATES=187, PETRI_FLOW=25883, PETRI_PLACES=490, PETRI_TRANSITIONS=1796} [2023-11-06 22:34:11,278 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 460 predicate places. [2023-11-06 22:34:11,279 INFO L495 AbstractCegarLoop]: Abstraction has has 490 places, 1796 transitions, 25883 flow [2023-11-06 22:34:11,279 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 71.48) internal successors, (1787), 25 states have internal predecessors, (1787), 0 states have call successors, (0), 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 22:34:11,279 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 22:34:11,280 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 22:34:11,285 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_359d5117-3c4b-41d6-9bce-ea2e82d16c2e/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2023-11-06 22:34:11,480 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_359d5117-3c4b-41d6-9bce-ea2e82d16c2e/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2023-11-06 22:34:11,480 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-11-06 22:34:11,480 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:34:11,481 INFO L85 PathProgramCache]: Analyzing trace with hash 923601907, now seen corresponding path program 6 times [2023-11-06 22:34:11,481 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:34:11,481 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [362729629] [2023-11-06 22:34:11,481 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:34:11,481 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:34:11,499 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:34:11,802 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 3 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:34:11,802 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:34:11,802 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [362729629] [2023-11-06 22:34:11,802 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [362729629] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-06 22:34:11,802 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [275493946] [2023-11-06 22:34:11,803 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-11-06 22:34:11,803 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:34:11,803 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_359d5117-3c4b-41d6-9bce-ea2e82d16c2e/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 22:34:11,808 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_359d5117-3c4b-41d6-9bce-ea2e82d16c2e/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 22:34:11,811 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_359d5117-3c4b-41d6-9bce-ea2e82d16c2e/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2023-11-06 22:34:11,912 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2023-11-06 22:34:11,912 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-06 22:34:11,914 INFO L262 TraceCheckSpWp]: Trace formula consists of 160 conjuncts, 17 conjunts are in the unsatisfiable core [2023-11-06 22:34:11,916 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 22:34:12,136 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 3 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:34:12,136 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 22:34:12,522 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:34:12,523 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [275493946] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-06 22:34:12,523 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-06 22:34:12,523 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 10, 9] total 23 [2023-11-06 22:34:12,523 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1178509649] [2023-11-06 22:34:12,524 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-06 22:34:12,524 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2023-11-06 22:34:12,524 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:34:12,525 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2023-11-06 22:34:12,525 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=107, Invalid=445, Unknown=0, NotChecked=0, Total=552 [2023-11-06 22:34:12,760 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 68 out of 178 [2023-11-06 22:34:12,762 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 490 places, 1796 transitions, 25883 flow. Second operand has 24 states, 24 states have (on average 70.66666666666667) internal successors, (1696), 24 states have internal predecessors, (1696), 0 states have call successors, (0), 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 22:34:12,762 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 22:34:12,762 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 68 of 178 [2023-11-06 22:34:12,763 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 22:34:28,213 INFO L124 PetriNetUnfolderBase]: 12628/21039 cut-off events. [2023-11-06 22:34:28,213 INFO L125 PetriNetUnfolderBase]: For 677132/677132 co-relation queries the response was YES. [2023-11-06 22:34:28,496 INFO L83 FinitePrefix]: Finished finitePrefix Result has 163792 conditions, 21039 events. 12628/21039 cut-off events. For 677132/677132 co-relation queries the response was YES. Maximal size of possible extension queue 773. Compared 153008 event pairs, 275 based on Foata normal form. 586/21625 useless extension candidates. Maximal degree in co-relation 163618. Up to 4892 conditions per place. [2023-11-06 22:34:28,622 INFO L140 encePairwiseOnDemand]: 169/178 looper letters, 1082 selfloop transitions, 1892 changer transitions 777/3751 dead transitions. [2023-11-06 22:34:28,622 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 508 places, 3751 transitions, 60928 flow [2023-11-06 22:34:28,622 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 98 states. [2023-11-06 22:34:28,623 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 98 states. [2023-11-06 22:34:28,630 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 98 states to 98 states and 7235 transitions. [2023-11-06 22:34:28,633 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41475578995643203 [2023-11-06 22:34:28,633 INFO L72 ComplementDD]: Start complementDD. Operand 98 states and 7235 transitions. [2023-11-06 22:34:28,634 INFO L73 IsDeterministic]: Start isDeterministic. Operand 98 states and 7235 transitions. [2023-11-06 22:34:28,636 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 22:34:28,636 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 98 states and 7235 transitions. [2023-11-06 22:34:28,648 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 99 states, 98 states have (on average 73.8265306122449) internal successors, (7235), 98 states have internal predecessors, (7235), 0 states have call successors, (0), 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 22:34:28,665 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 99 states, 99 states have (on average 178.0) internal successors, (17622), 99 states have internal predecessors, (17622), 0 states have call successors, (0), 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 22:34:28,669 INFO L81 ComplementDD]: Finished complementDD. Result has 99 states, 99 states have (on average 178.0) internal successors, (17622), 99 states have internal predecessors, (17622), 0 states have call successors, (0), 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 22:34:28,669 INFO L175 Difference]: Start difference. First operand has 490 places, 1796 transitions, 25883 flow. Second operand 98 states and 7235 transitions. [2023-11-06 22:34:28,669 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 508 places, 3751 transitions, 60928 flow [2023-11-06 22:34:41,438 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 450 places, 3751 transitions, 51848 flow, removed 3978 selfloop flow, removed 58 redundant places. [2023-11-06 22:34:41,494 INFO L231 Difference]: Finished difference. Result has 504 places, 2645 transitions, 39327 flow [2023-11-06 22:34:41,497 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=178, PETRI_DIFFERENCE_MINUEND_FLOW=22174, PETRI_DIFFERENCE_MINUEND_PLACES=353, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1786, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1040, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=595, PETRI_DIFFERENCE_SUBTRAHEND_STATES=98, PETRI_FLOW=39327, PETRI_PLACES=504, PETRI_TRANSITIONS=2645} [2023-11-06 22:34:41,497 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 474 predicate places. [2023-11-06 22:34:41,497 INFO L495 AbstractCegarLoop]: Abstraction has has 504 places, 2645 transitions, 39327 flow [2023-11-06 22:34:41,498 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 70.66666666666667) internal successors, (1696), 24 states have internal predecessors, (1696), 0 states have call successors, (0), 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 22:34:41,498 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 22:34:41,498 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 22:34:41,504 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_359d5117-3c4b-41d6-9bce-ea2e82d16c2e/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Ended with exit code 0 [2023-11-06 22:34:41,704 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_359d5117-3c4b-41d6-9bce-ea2e82d16c2e/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2023-11-06 22:34:41,704 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-11-06 22:34:41,704 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:34:41,705 INFO L85 PathProgramCache]: Analyzing trace with hash 2045553472, now seen corresponding path program 7 times [2023-11-06 22:34:41,705 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:34:41,705 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1868906080] [2023-11-06 22:34:41,705 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:34:41,705 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:34:41,731 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:34:42,286 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 3 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:34:42,286 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:34:42,287 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1868906080] [2023-11-06 22:34:42,287 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1868906080] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-06 22:34:42,287 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1493982406] [2023-11-06 22:34:42,287 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-11-06 22:34:42,287 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:34:42,287 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_359d5117-3c4b-41d6-9bce-ea2e82d16c2e/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 22:34:42,289 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_359d5117-3c4b-41d6-9bce-ea2e82d16c2e/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 22:34:42,296 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_359d5117-3c4b-41d6-9bce-ea2e82d16c2e/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2023-11-06 22:34:42,395 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:34:42,397 INFO L262 TraceCheckSpWp]: Trace formula consists of 166 conjuncts, 20 conjunts are in the unsatisfiable core [2023-11-06 22:34:42,399 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 22:34:42,710 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 3 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:34:42,710 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 22:34:43,244 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:34:43,245 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1493982406] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-06 22:34:43,245 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-06 22:34:43,245 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 13, 11] total 30 [2023-11-06 22:34:43,245 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [912892784] [2023-11-06 22:34:43,246 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-06 22:34:43,246 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2023-11-06 22:34:43,247 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:34:43,247 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2023-11-06 22:34:43,248 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=163, Invalid=767, Unknown=0, NotChecked=0, Total=930 [2023-11-06 22:34:43,470 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 68 out of 178 [2023-11-06 22:34:43,472 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 504 places, 2645 transitions, 39327 flow. Second operand has 31 states, 31 states have (on average 70.29032258064517) internal successors, (2179), 31 states have internal predecessors, (2179), 0 states have call successors, (0), 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 22:34:43,472 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 22:34:43,472 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 68 of 178 [2023-11-06 22:34:43,472 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand