./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/weaver/popl20-nonblocking-cntr-alt.wvr.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 0e0057cc 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_efe2ab4f-2cfc-4214-b362-87e4b63bce63/bin/uautomizer-verify-VRDe98Ueme/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_efe2ab4f-2cfc-4214-b362-87e4b63bce63/bin/uautomizer-verify-VRDe98Ueme/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_efe2ab4f-2cfc-4214-b362-87e4b63bce63/bin/uautomizer-verify-VRDe98Ueme/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_efe2ab4f-2cfc-4214-b362-87e4b63bce63/bin/uautomizer-verify-VRDe98Ueme/config/AutomizerReach.xml -i ../../sv-benchmarks/c/weaver/popl20-nonblocking-cntr-alt.wvr.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_efe2ab4f-2cfc-4214-b362-87e4b63bce63/bin/uautomizer-verify-VRDe98Ueme/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_efe2ab4f-2cfc-4214-b362-87e4b63bce63/bin/uautomizer-verify-VRDe98Ueme --witnessprinter.witness.filename witness --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 0ead2366baa94ec77674f75cd829f45857f5651e204e91d33a749a2af2868461 --- Real Ultimate output --- This is Ultimate 0.2.4-dev-0e0057c [2023-11-26 11:46:53,531 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-11-26 11:46:53,606 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_efe2ab4f-2cfc-4214-b362-87e4b63bce63/bin/uautomizer-verify-VRDe98Ueme/config/svcomp-Reach-32bit-Automizer_Default.epf [2023-11-26 11:46:53,614 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-11-26 11:46:53,615 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-11-26 11:46:53,666 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-11-26 11:46:53,666 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-11-26 11:46:53,667 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-11-26 11:46:53,668 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2023-11-26 11:46:53,674 INFO L153 SettingsManager]: * Use memory slicer=true [2023-11-26 11:46:53,675 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-11-26 11:46:53,675 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-11-26 11:46:53,676 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-11-26 11:46:53,678 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-11-26 11:46:53,678 INFO L153 SettingsManager]: * Use SBE=true [2023-11-26 11:46:53,679 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-11-26 11:46:53,679 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-11-26 11:46:53,680 INFO L153 SettingsManager]: * sizeof long=4 [2023-11-26 11:46:53,680 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-11-26 11:46:53,681 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-11-26 11:46:53,682 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-11-26 11:46:53,683 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-11-26 11:46:53,683 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-11-26 11:46:53,684 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-11-26 11:46:53,684 INFO L153 SettingsManager]: * sizeof long double=12 [2023-11-26 11:46:53,685 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-11-26 11:46:53,685 INFO L153 SettingsManager]: * Use constant arrays=true [2023-11-26 11:46:53,686 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-11-26 11:46:53,686 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-11-26 11:46:53,687 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2023-11-26 11:46:53,688 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-11-26 11:46:53,688 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2023-11-26 11:46:53,689 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-11-26 11:46:53,689 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-11-26 11:46:53,689 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2023-11-26 11:46:53,690 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-11-26 11:46:53,690 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-11-26 11:46:53,690 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2023-11-26 11:46:53,690 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-11-26 11:46:53,691 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-11-26 11:46:53,691 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-11-26 11:46:53,691 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-11-26 11:46:53,692 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_efe2ab4f-2cfc-4214-b362-87e4b63bce63/bin/uautomizer-verify-VRDe98Ueme/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_efe2ab4f-2cfc-4214-b362-87e4b63bce63/bin/uautomizer-verify-VRDe98Ueme Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 0ead2366baa94ec77674f75cd829f45857f5651e204e91d33a749a2af2868461 [2023-11-26 11:46:54,043 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-11-26 11:46:54,098 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-11-26 11:46:54,101 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-11-26 11:46:54,102 INFO L270 PluginConnector]: Initializing CDTParser... [2023-11-26 11:46:54,103 INFO L274 PluginConnector]: CDTParser initialized [2023-11-26 11:46:54,104 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_efe2ab4f-2cfc-4214-b362-87e4b63bce63/bin/uautomizer-verify-VRDe98Ueme/../../sv-benchmarks/c/weaver/popl20-nonblocking-cntr-alt.wvr.c [2023-11-26 11:46:57,722 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-11-26 11:46:58,021 INFO L384 CDTParser]: Found 1 translation units. [2023-11-26 11:46:58,022 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_efe2ab4f-2cfc-4214-b362-87e4b63bce63/sv-benchmarks/c/weaver/popl20-nonblocking-cntr-alt.wvr.c [2023-11-26 11:46:58,033 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_efe2ab4f-2cfc-4214-b362-87e4b63bce63/bin/uautomizer-verify-VRDe98Ueme/data/2e6a9a25b/d1e0ee457060465292662b5e5b544230/FLAGaa4a68340 [2023-11-26 11:46:58,052 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_efe2ab4f-2cfc-4214-b362-87e4b63bce63/bin/uautomizer-verify-VRDe98Ueme/data/2e6a9a25b/d1e0ee457060465292662b5e5b544230 [2023-11-26 11:46:58,056 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-11-26 11:46:58,058 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2023-11-26 11:46:58,060 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-11-26 11:46:58,060 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-11-26 11:46:58,067 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-11-26 11:46:58,069 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 26.11 11:46:58" (1/1) ... [2023-11-26 11:46:58,070 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@2e379b46 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 11:46:58, skipping insertion in model container [2023-11-26 11:46:58,071 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 26.11 11:46:58" (1/1) ... [2023-11-26 11:46:58,100 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-11-26 11:46:58,377 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_efe2ab4f-2cfc-4214-b362-87e4b63bce63/sv-benchmarks/c/weaver/popl20-nonblocking-cntr-alt.wvr.c[2124,2137] [2023-11-26 11:46:58,383 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-26 11:46:58,397 INFO L202 MainTranslator]: Completed pre-run [2023-11-26 11:46:58,425 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_efe2ab4f-2cfc-4214-b362-87e4b63bce63/sv-benchmarks/c/weaver/popl20-nonblocking-cntr-alt.wvr.c[2124,2137] [2023-11-26 11:46:58,426 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-26 11:46:58,437 WARN L675 CHandler]: The function __VERIFIER_atomic_begin is called, but not defined or handled by StandardFunctionHandler. [2023-11-26 11:46:58,438 WARN L675 CHandler]: The function __VERIFIER_atomic_end is called, but not defined or handled by StandardFunctionHandler. [2023-11-26 11:46:58,448 INFO L206 MainTranslator]: Completed translation [2023-11-26 11:46:58,449 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 11:46:58 WrapperNode [2023-11-26 11:46:58,449 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-11-26 11:46:58,451 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-11-26 11:46:58,451 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-11-26 11:46:58,452 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-11-26 11:46:58,461 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 11:46:58" (1/1) ... [2023-11-26 11:46:58,471 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 11:46:58" (1/1) ... [2023-11-26 11:46:58,496 INFO L138 Inliner]: procedures = 21, calls = 24, calls flagged for inlining = 4, calls inlined = 4, statements flattened = 58 [2023-11-26 11:46:58,496 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-11-26 11:46:58,497 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-11-26 11:46:58,498 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-11-26 11:46:58,498 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-11-26 11:46:58,521 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 11:46:58" (1/1) ... [2023-11-26 11:46:58,521 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 11:46:58" (1/1) ... [2023-11-26 11:46:58,527 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 11:46:58" (1/1) ... [2023-11-26 11:46:58,546 INFO L175 MemorySlicer]: Split 6 memory accesses to 3 slices as follows [2, 2, 2]. 33 percent of accesses are in the largest equivalence class. The 2 initializations are split as follows [2, 0, 0]. The 2 writes are split as follows [0, 1, 1]. [2023-11-26 11:46:58,546 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 11:46:58" (1/1) ... [2023-11-26 11:46:58,547 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 11:46:58" (1/1) ... [2023-11-26 11:46:58,555 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 11:46:58" (1/1) ... [2023-11-26 11:46:58,560 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 11:46:58" (1/1) ... [2023-11-26 11:46:58,562 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 11:46:58" (1/1) ... [2023-11-26 11:46:58,564 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 11:46:58" (1/1) ... [2023-11-26 11:46:58,568 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-11-26 11:46:58,570 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-11-26 11:46:58,570 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-11-26 11:46:58,570 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-11-26 11:46:58,571 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 11:46:58" (1/1) ... [2023-11-26 11:46:58,608 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2023-11-26 11:46:58,625 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_efe2ab4f-2cfc-4214-b362-87e4b63bce63/bin/uautomizer-verify-VRDe98Ueme/z3 [2023-11-26 11:46:58,641 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_efe2ab4f-2cfc-4214-b362-87e4b63bce63/bin/uautomizer-verify-VRDe98Ueme/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (exit command is (exit), workingDir is null) [2023-11-26 11:46:58,657 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_efe2ab4f-2cfc-4214-b362-87e4b63bce63/bin/uautomizer-verify-VRDe98Ueme/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Waiting until timeout for monitored process [2023-11-26 11:46:58,711 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-11-26 11:46:58,711 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2023-11-26 11:46:58,711 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2023-11-26 11:46:58,713 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2023-11-26 11:46:58,713 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2023-11-26 11:46:58,713 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2023-11-26 11:46:58,716 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#1 [2023-11-26 11:46:58,717 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#2 [2023-11-26 11:46:58,718 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-11-26 11:46:58,718 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#0 [2023-11-26 11:46:58,718 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#1 [2023-11-26 11:46:58,718 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#2 [2023-11-26 11:46:58,719 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2023-11-26 11:46:58,719 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2023-11-26 11:46:58,719 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-11-26 11:46:58,719 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-11-26 11:46:58,720 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#0 [2023-11-26 11:46:58,720 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#1 [2023-11-26 11:46:58,721 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#2 [2023-11-26 11:46:58,721 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-11-26 11:46:58,723 WARN L213 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement [2023-11-26 11:46:58,959 INFO L241 CfgBuilder]: Building ICFG [2023-11-26 11:46:58,962 INFO L267 CfgBuilder]: Building CFG for each procedure with an implementation [2023-11-26 11:46:59,291 INFO L282 CfgBuilder]: Performing block encoding [2023-11-26 11:46:59,586 INFO L304 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-11-26 11:46:59,586 INFO L309 CfgBuilder]: Removed 2 assume(true) statements. [2023-11-26 11:46:59,587 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 26.11 11:46:59 BoogieIcfgContainer [2023-11-26 11:46:59,587 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-11-26 11:46:59,590 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-11-26 11:46:59,591 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-11-26 11:46:59,595 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-11-26 11:46:59,595 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 26.11 11:46:58" (1/3) ... [2023-11-26 11:46:59,596 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@ef2bb13 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 26.11 11:46:59, skipping insertion in model container [2023-11-26 11:46:59,596 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 11:46:58" (2/3) ... [2023-11-26 11:46:59,597 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@ef2bb13 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 26.11 11:46:59, skipping insertion in model container [2023-11-26 11:46:59,597 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 26.11 11:46:59" (3/3) ... [2023-11-26 11:46:59,600 INFO L112 eAbstractionObserver]: Analyzing ICFG popl20-nonblocking-cntr-alt.wvr.c [2023-11-26 11:46:59,612 WARN L145 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2023-11-26 11:46:59,626 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-11-26 11:46:59,627 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-11-26 11:46:59,627 INFO L514 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-11-26 11:46:59,685 INFO L144 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2023-11-26 11:46:59,727 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 27 places, 22 transitions, 58 flow [2023-11-26 11:46:59,758 INFO L124 PetriNetUnfolderBase]: 2/20 cut-off events. [2023-11-26 11:46:59,758 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2023-11-26 11:46:59,761 INFO L83 FinitePrefix]: Finished finitePrefix Result has 29 conditions, 20 events. 2/20 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 3. Compared 18 event pairs, 0 based on Foata normal form. 0/17 useless extension candidates. Maximal degree in co-relation 14. Up to 2 conditions per place. [2023-11-26 11:46:59,761 INFO L82 GeneralOperation]: Start removeDead. Operand has 27 places, 22 transitions, 58 flow [2023-11-26 11:46:59,765 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 24 places, 19 transitions, 50 flow [2023-11-26 11:46:59,792 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-26 11:46:59,801 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=LoopHeads, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mPorIndependenceSettings=[Lde.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings;@3b1c1c0e, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-11-26 11:46:59,801 INFO L358 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2023-11-26 11:46:59,814 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-11-26 11:46:59,814 INFO L124 PetriNetUnfolderBase]: 2/18 cut-off events. [2023-11-26 11:46:59,815 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2023-11-26 11:46:59,815 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-26 11:46:59,816 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-26 11:46:59,816 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-26 11:46:59,823 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 11:46:59,823 INFO L85 PathProgramCache]: Analyzing trace with hash 2041025963, now seen corresponding path program 1 times [2023-11-26 11:46:59,835 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 11:46:59,836 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1069868691] [2023-11-26 11:46:59,836 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 11:46:59,837 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 11:46:59,965 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 11:47:00,371 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-26 11:47:00,373 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 11:47:00,373 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1069868691] [2023-11-26 11:47:00,374 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1069868691] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-26 11:47:00,375 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-26 11:47:00,375 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-26 11:47:00,377 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [979399734] [2023-11-26 11:47:00,379 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-26 11:47:00,390 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-26 11:47:00,401 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-26 11:47:00,440 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-26 11:47:00,441 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-11-26 11:47:00,455 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 22 [2023-11-26 11:47:00,458 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 24 places, 19 transitions, 50 flow. Second operand has 4 states, 4 states have (on average 8.25) internal successors, (33), 4 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 11:47:00,459 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-26 11:47:00,459 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 22 [2023-11-26 11:47:00,460 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-26 11:47:00,642 INFO L124 PetriNetUnfolderBase]: 65/136 cut-off events. [2023-11-26 11:47:00,642 INFO L125 PetriNetUnfolderBase]: For 12/12 co-relation queries the response was YES. [2023-11-26 11:47:00,645 INFO L83 FinitePrefix]: Finished finitePrefix Result has 271 conditions, 136 events. 65/136 cut-off events. For 12/12 co-relation queries the response was YES. Maximal size of possible extension queue 14. Compared 412 event pairs, 33 based on Foata normal form. 10/145 useless extension candidates. Maximal degree in co-relation 217. Up to 92 conditions per place. [2023-11-26 11:47:00,650 INFO L140 encePairwiseOnDemand]: 18/22 looper letters, 21 selfloop transitions, 3 changer transitions 0/27 dead transitions. [2023-11-26 11:47:00,650 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 27 places, 27 transitions, 117 flow [2023-11-26 11:47:00,664 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-26 11:47:00,684 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-11-26 11:47:00,694 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 45 transitions. [2023-11-26 11:47:00,696 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5113636363636364 [2023-11-26 11:47:00,697 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 45 transitions. [2023-11-26 11:47:00,698 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 45 transitions. [2023-11-26 11:47:00,710 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-26 11:47:00,713 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 45 transitions. [2023-11-26 11:47:00,716 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 11.25) internal successors, (45), 4 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 11:47:00,722 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 22.0) internal successors, (110), 5 states have internal predecessors, (110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 11:47:00,722 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 22.0) internal successors, (110), 5 states have internal predecessors, (110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 11:47:00,725 INFO L175 Difference]: Start difference. First operand has 24 places, 19 transitions, 50 flow. Second operand 4 states and 45 transitions. [2023-11-26 11:47:00,727 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 27 places, 27 transitions, 117 flow [2023-11-26 11:47:00,730 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 23 places, 27 transitions, 107 flow, removed 0 selfloop flow, removed 4 redundant places. [2023-11-26 11:47:00,733 INFO L231 Difference]: Finished difference. Result has 24 places, 20 transitions, 56 flow [2023-11-26 11:47:00,735 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=22, PETRI_DIFFERENCE_MINUEND_FLOW=42, PETRI_DIFFERENCE_MINUEND_PLACES=20, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=19, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=16, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=56, PETRI_PLACES=24, PETRI_TRANSITIONS=20} [2023-11-26 11:47:00,742 INFO L281 CegarLoopForPetriNet]: 24 programPoint places, 0 predicate places. [2023-11-26 11:47:00,742 INFO L495 AbstractCegarLoop]: Abstraction has has 24 places, 20 transitions, 56 flow [2023-11-26 11:47:00,743 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 8.25) internal successors, (33), 4 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 11:47:00,743 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-26 11:47:00,743 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-26 11:47:00,744 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-11-26 11:47:00,745 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-26 11:47:00,746 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 11:47:00,746 INFO L85 PathProgramCache]: Analyzing trace with hash -1493584575, now seen corresponding path program 1 times [2023-11-26 11:47:00,746 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 11:47:00,747 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1236303203] [2023-11-26 11:47:00,748 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 11:47:00,749 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 11:47:00,799 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 11:47:01,042 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-26 11:47:01,043 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 11:47:01,043 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1236303203] [2023-11-26 11:47:01,043 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1236303203] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-26 11:47:01,044 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-26 11:47:01,044 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-26 11:47:01,044 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [517715426] [2023-11-26 11:47:01,044 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-26 11:47:01,046 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-26 11:47:01,047 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-26 11:47:01,048 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-26 11:47:01,050 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-11-26 11:47:01,056 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 22 [2023-11-26 11:47:01,057 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 24 places, 20 transitions, 56 flow. Second operand has 4 states, 4 states have (on average 8.5) internal successors, (34), 4 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 11:47:01,058 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-26 11:47:01,058 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 22 [2023-11-26 11:47:01,058 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-26 11:47:01,202 INFO L124 PetriNetUnfolderBase]: 93/182 cut-off events. [2023-11-26 11:47:01,203 INFO L125 PetriNetUnfolderBase]: For 76/76 co-relation queries the response was YES. [2023-11-26 11:47:01,207 INFO L83 FinitePrefix]: Finished finitePrefix Result has 428 conditions, 182 events. 93/182 cut-off events. For 76/76 co-relation queries the response was YES. Maximal size of possible extension queue 15. Compared 614 event pairs, 45 based on Foata normal form. 10/185 useless extension candidates. Maximal degree in co-relation 105. Up to 116 conditions per place. [2023-11-26 11:47:01,210 INFO L140 encePairwiseOnDemand]: 18/22 looper letters, 23 selfloop transitions, 3 changer transitions 0/29 dead transitions. [2023-11-26 11:47:01,211 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 27 places, 29 transitions, 137 flow [2023-11-26 11:47:01,212 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-26 11:47:01,213 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-11-26 11:47:01,213 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 45 transitions. [2023-11-26 11:47:01,214 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5113636363636364 [2023-11-26 11:47:01,215 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 45 transitions. [2023-11-26 11:47:01,215 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 45 transitions. [2023-11-26 11:47:01,219 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-26 11:47:01,220 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 45 transitions. [2023-11-26 11:47:01,222 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 11.25) internal successors, (45), 4 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 11:47:01,225 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 22.0) internal successors, (110), 5 states have internal predecessors, (110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 11:47:01,226 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 22.0) internal successors, (110), 5 states have internal predecessors, (110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 11:47:01,227 INFO L175 Difference]: Start difference. First operand has 24 places, 20 transitions, 56 flow. Second operand 4 states and 45 transitions. [2023-11-26 11:47:01,227 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 27 places, 29 transitions, 137 flow [2023-11-26 11:47:01,229 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 25 places, 29 transitions, 131 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-11-26 11:47:01,230 INFO L231 Difference]: Finished difference. Result has 26 places, 21 transitions, 66 flow [2023-11-26 11:47:01,231 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=22, PETRI_DIFFERENCE_MINUEND_FLOW=52, PETRI_DIFFERENCE_MINUEND_PLACES=22, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=20, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=17, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=66, PETRI_PLACES=26, PETRI_TRANSITIONS=21} [2023-11-26 11:47:01,232 INFO L281 CegarLoopForPetriNet]: 24 programPoint places, 2 predicate places. [2023-11-26 11:47:01,232 INFO L495 AbstractCegarLoop]: Abstraction has has 26 places, 21 transitions, 66 flow [2023-11-26 11:47:01,232 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 8.5) internal successors, (34), 4 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 11:47:01,232 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-26 11:47:01,233 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-26 11:47:01,233 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-11-26 11:47:01,233 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-26 11:47:01,234 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 11:47:01,234 INFO L85 PathProgramCache]: Analyzing trace with hash -474198347, now seen corresponding path program 1 times [2023-11-26 11:47:01,235 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 11:47:01,235 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [249666206] [2023-11-26 11:47:01,235 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 11:47:01,235 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 11:47:01,274 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 11:47:01,894 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-26 11:47:01,894 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 11:47:01,895 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [249666206] [2023-11-26 11:47:01,896 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [249666206] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-26 11:47:01,896 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1080314473] [2023-11-26 11:47:01,896 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 11:47:01,896 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-26 11:47:01,897 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_efe2ab4f-2cfc-4214-b362-87e4b63bce63/bin/uautomizer-verify-VRDe98Ueme/z3 [2023-11-26 11:47:01,900 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_efe2ab4f-2cfc-4214-b362-87e4b63bce63/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-26 11:47:01,920 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_efe2ab4f-2cfc-4214-b362-87e4b63bce63/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-11-26 11:47:02,000 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 11:47:02,003 INFO L262 TraceCheckSpWp]: Trace formula consists of 125 conjuncts, 12 conjunts are in the unsatisfiable core [2023-11-26 11:47:02,013 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-26 11:47:02,411 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-26 11:47:02,411 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-26 11:47:03,154 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-26 11:47:03,154 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1080314473] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-26 11:47:03,155 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-26 11:47:03,155 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 23 [2023-11-26 11:47:03,155 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [714838341] [2023-11-26 11:47:03,155 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-26 11:47:03,156 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2023-11-26 11:47:03,157 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-26 11:47:03,157 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2023-11-26 11:47:03,158 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=127, Invalid=425, Unknown=0, NotChecked=0, Total=552 [2023-11-26 11:47:03,169 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 22 [2023-11-26 11:47:03,170 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 26 places, 21 transitions, 66 flow. Second operand has 24 states, 24 states have (on average 5.0) internal successors, (120), 24 states have internal predecessors, (120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 11:47:03,170 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-26 11:47:03,170 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 22 [2023-11-26 11:47:03,170 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-26 11:47:05,032 INFO L124 PetriNetUnfolderBase]: 596/1052 cut-off events. [2023-11-26 11:47:05,032 INFO L125 PetriNetUnfolderBase]: For 267/267 co-relation queries the response was YES. [2023-11-26 11:47:05,037 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2598 conditions, 1052 events. 596/1052 cut-off events. For 267/267 co-relation queries the response was YES. Maximal size of possible extension queue 77. Compared 4989 event pairs, 14 based on Foata normal form. 2/1054 useless extension candidates. Maximal degree in co-relation 881. Up to 229 conditions per place. [2023-11-26 11:47:05,049 INFO L140 encePairwiseOnDemand]: 10/22 looper letters, 133 selfloop transitions, 111 changer transitions 16/261 dead transitions. [2023-11-26 11:47:05,049 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 64 places, 261 transitions, 1286 flow [2023-11-26 11:47:05,050 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2023-11-26 11:47:05,050 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 39 states. [2023-11-26 11:47:05,058 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 363 transitions. [2023-11-26 11:47:05,060 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4230769230769231 [2023-11-26 11:47:05,060 INFO L72 ComplementDD]: Start complementDD. Operand 39 states and 363 transitions. [2023-11-26 11:47:05,061 INFO L73 IsDeterministic]: Start isDeterministic. Operand 39 states and 363 transitions. [2023-11-26 11:47:05,064 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-26 11:47:05,064 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 39 states and 363 transitions. [2023-11-26 11:47:05,068 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 40 states, 39 states have (on average 9.307692307692308) internal successors, (363), 39 states have internal predecessors, (363), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 11:47:05,074 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 40 states, 40 states have (on average 22.0) internal successors, (880), 40 states have internal predecessors, (880), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 11:47:05,075 INFO L81 ComplementDD]: Finished complementDD. Result has 40 states, 40 states have (on average 22.0) internal successors, (880), 40 states have internal predecessors, (880), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 11:47:05,076 INFO L175 Difference]: Start difference. First operand has 26 places, 21 transitions, 66 flow. Second operand 39 states and 363 transitions. [2023-11-26 11:47:05,076 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 64 places, 261 transitions, 1286 flow [2023-11-26 11:47:05,083 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 62 places, 261 transitions, 1272 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-11-26 11:47:05,088 INFO L231 Difference]: Finished difference. Result has 79 places, 150 transitions, 914 flow [2023-11-26 11:47:05,089 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=22, PETRI_DIFFERENCE_MINUEND_FLOW=62, PETRI_DIFFERENCE_MINUEND_PLACES=24, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=21, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=8, PETRI_DIFFERENCE_SUBTRAHEND_STATES=39, PETRI_FLOW=914, PETRI_PLACES=79, PETRI_TRANSITIONS=150} [2023-11-26 11:47:05,090 INFO L281 CegarLoopForPetriNet]: 24 programPoint places, 55 predicate places. [2023-11-26 11:47:05,091 INFO L495 AbstractCegarLoop]: Abstraction has has 79 places, 150 transitions, 914 flow [2023-11-26 11:47:05,092 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 5.0) internal successors, (120), 24 states have internal predecessors, (120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 11:47:05,093 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-26 11:47:05,093 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-26 11:47:05,110 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_efe2ab4f-2cfc-4214-b362-87e4b63bce63/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-11-26 11:47:05,300 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_efe2ab4f-2cfc-4214-b362-87e4b63bce63/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-26 11:47:05,300 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-26 11:47:05,300 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 11:47:05,301 INFO L85 PathProgramCache]: Analyzing trace with hash 2106595569, now seen corresponding path program 2 times [2023-11-26 11:47:05,301 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 11:47:05,301 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1829210633] [2023-11-26 11:47:05,301 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 11:47:05,301 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 11:47:05,322 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 11:47:05,627 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-26 11:47:05,627 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 11:47:05,627 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1829210633] [2023-11-26 11:47:05,627 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1829210633] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-26 11:47:05,628 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2070892686] [2023-11-26 11:47:05,628 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-26 11:47:05,628 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-26 11:47:05,628 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_efe2ab4f-2cfc-4214-b362-87e4b63bce63/bin/uautomizer-verify-VRDe98Ueme/z3 [2023-11-26 11:47:05,629 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_efe2ab4f-2cfc-4214-b362-87e4b63bce63/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-26 11:47:05,659 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_efe2ab4f-2cfc-4214-b362-87e4b63bce63/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-11-26 11:47:05,721 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-11-26 11:47:05,721 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-26 11:47:05,723 INFO L262 TraceCheckSpWp]: Trace formula consists of 125 conjuncts, 12 conjunts are in the unsatisfiable core [2023-11-26 11:47:05,726 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-26 11:47:05,961 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-26 11:47:05,961 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-26 11:47:06,578 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-26 11:47:06,578 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2070892686] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-26 11:47:06,578 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-26 11:47:06,578 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 23 [2023-11-26 11:47:06,579 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [200078087] [2023-11-26 11:47:06,579 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-26 11:47:06,579 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2023-11-26 11:47:06,580 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-26 11:47:06,581 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2023-11-26 11:47:06,581 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=119, Invalid=433, Unknown=0, NotChecked=0, Total=552 [2023-11-26 11:47:06,604 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 22 [2023-11-26 11:47:06,605 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 79 places, 150 transitions, 914 flow. Second operand has 24 states, 24 states have (on average 4.958333333333333) internal successors, (119), 24 states have internal predecessors, (119), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 11:47:06,605 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-26 11:47:06,605 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 22 [2023-11-26 11:47:06,605 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-26 11:47:08,182 INFO L124 PetriNetUnfolderBase]: 687/1277 cut-off events. [2023-11-26 11:47:08,182 INFO L125 PetriNetUnfolderBase]: For 3089/3089 co-relation queries the response was YES. [2023-11-26 11:47:08,191 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5011 conditions, 1277 events. 687/1277 cut-off events. For 3089/3089 co-relation queries the response was YES. Maximal size of possible extension queue 79. Compared 6388 event pairs, 38 based on Foata normal form. 3/1280 useless extension candidates. Maximal degree in co-relation 4940. Up to 382 conditions per place. [2023-11-26 11:47:08,203 INFO L140 encePairwiseOnDemand]: 11/22 looper letters, 138 selfloop transitions, 115 changer transitions 32/286 dead transitions. [2023-11-26 11:47:08,203 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 104 places, 286 transitions, 2240 flow [2023-11-26 11:47:08,204 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2023-11-26 11:47:08,204 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2023-11-26 11:47:08,207 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 262 transitions. [2023-11-26 11:47:08,208 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44107744107744107 [2023-11-26 11:47:08,212 INFO L72 ComplementDD]: Start complementDD. Operand 27 states and 262 transitions. [2023-11-26 11:47:08,213 INFO L73 IsDeterministic]: Start isDeterministic. Operand 27 states and 262 transitions. [2023-11-26 11:47:08,214 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-26 11:47:08,214 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 27 states and 262 transitions. [2023-11-26 11:47:08,216 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 28 states, 27 states have (on average 9.703703703703704) internal successors, (262), 27 states have internal predecessors, (262), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 11:47:08,247 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 28 states, 28 states have (on average 22.0) internal successors, (616), 28 states have internal predecessors, (616), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 11:47:08,247 INFO L81 ComplementDD]: Finished complementDD. Result has 28 states, 28 states have (on average 22.0) internal successors, (616), 28 states have internal predecessors, (616), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 11:47:08,248 INFO L175 Difference]: Start difference. First operand has 79 places, 150 transitions, 914 flow. Second operand 27 states and 262 transitions. [2023-11-26 11:47:08,248 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 104 places, 286 transitions, 2240 flow [2023-11-26 11:47:08,314 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 101 places, 286 transitions, 2144 flow, removed 35 selfloop flow, removed 3 redundant places. [2023-11-26 11:47:08,324 INFO L231 Difference]: Finished difference. Result has 110 places, 179 transitions, 1392 flow [2023-11-26 11:47:08,325 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=22, PETRI_DIFFERENCE_MINUEND_FLOW=846, PETRI_DIFFERENCE_MINUEND_PLACES=75, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=150, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=88, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=56, PETRI_DIFFERENCE_SUBTRAHEND_STATES=27, PETRI_FLOW=1392, PETRI_PLACES=110, PETRI_TRANSITIONS=179} [2023-11-26 11:47:08,327 INFO L281 CegarLoopForPetriNet]: 24 programPoint places, 86 predicate places. [2023-11-26 11:47:08,328 INFO L495 AbstractCegarLoop]: Abstraction has has 110 places, 179 transitions, 1392 flow [2023-11-26 11:47:08,328 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 4.958333333333333) internal successors, (119), 24 states have internal predecessors, (119), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 11:47:08,328 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-26 11:47:08,329 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-26 11:47:08,342 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_efe2ab4f-2cfc-4214-b362-87e4b63bce63/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-11-26 11:47:08,536 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_efe2ab4f-2cfc-4214-b362-87e4b63bce63/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3 [2023-11-26 11:47:08,537 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-26 11:47:08,539 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 11:47:08,540 INFO L85 PathProgramCache]: Analyzing trace with hash -1243778285, now seen corresponding path program 3 times [2023-11-26 11:47:08,540 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 11:47:08,540 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1776882574] [2023-11-26 11:47:08,540 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 11:47:08,541 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 11:47:08,566 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 11:47:08,919 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-26 11:47:08,919 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 11:47:08,920 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1776882574] [2023-11-26 11:47:08,920 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1776882574] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-26 11:47:08,921 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1594835040] [2023-11-26 11:47:08,921 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-11-26 11:47:08,921 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-26 11:47:08,921 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_efe2ab4f-2cfc-4214-b362-87e4b63bce63/bin/uautomizer-verify-VRDe98Ueme/z3 [2023-11-26 11:47:08,925 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_efe2ab4f-2cfc-4214-b362-87e4b63bce63/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-26 11:47:08,934 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_efe2ab4f-2cfc-4214-b362-87e4b63bce63/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-11-26 11:47:09,036 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2023-11-26 11:47:09,036 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-26 11:47:09,038 INFO L262 TraceCheckSpWp]: Trace formula consists of 125 conjuncts, 12 conjunts are in the unsatisfiable core [2023-11-26 11:47:09,041 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-26 11:47:09,346 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-26 11:47:09,346 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-26 11:47:10,156 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-26 11:47:10,157 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1594835040] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-26 11:47:10,157 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-26 11:47:10,157 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 23 [2023-11-26 11:47:10,158 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [396837625] [2023-11-26 11:47:10,158 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-26 11:47:10,159 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2023-11-26 11:47:10,159 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-26 11:47:10,160 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2023-11-26 11:47:10,161 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=117, Invalid=435, Unknown=0, NotChecked=0, Total=552 [2023-11-26 11:47:10,177 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 22 [2023-11-26 11:47:10,178 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 110 places, 179 transitions, 1392 flow. Second operand has 24 states, 24 states have (on average 4.958333333333333) internal successors, (119), 24 states have internal predecessors, (119), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 11:47:10,178 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-26 11:47:10,178 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 22 [2023-11-26 11:47:10,178 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-26 11:47:11,854 INFO L124 PetriNetUnfolderBase]: 653/1213 cut-off events. [2023-11-26 11:47:11,854 INFO L125 PetriNetUnfolderBase]: For 5186/5186 co-relation queries the response was YES. [2023-11-26 11:47:11,861 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5574 conditions, 1213 events. 653/1213 cut-off events. For 5186/5186 co-relation queries the response was YES. Maximal size of possible extension queue 74. Compared 5958 event pairs, 36 based on Foata normal form. 1/1214 useless extension candidates. Maximal degree in co-relation 5486. Up to 388 conditions per place. [2023-11-26 11:47:11,871 INFO L140 encePairwiseOnDemand]: 10/22 looper letters, 129 selfloop transitions, 124 changer transitions 19/273 dead transitions. [2023-11-26 11:47:11,871 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 134 places, 273 transitions, 2502 flow [2023-11-26 11:47:11,872 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2023-11-26 11:47:11,872 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2023-11-26 11:47:11,873 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 278 transitions. [2023-11-26 11:47:11,874 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4212121212121212 [2023-11-26 11:47:11,874 INFO L72 ComplementDD]: Start complementDD. Operand 30 states and 278 transitions. [2023-11-26 11:47:11,874 INFO L73 IsDeterministic]: Start isDeterministic. Operand 30 states and 278 transitions. [2023-11-26 11:47:11,875 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-26 11:47:11,875 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 30 states and 278 transitions. [2023-11-26 11:47:11,876 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 31 states, 30 states have (on average 9.266666666666667) internal successors, (278), 30 states have internal predecessors, (278), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 11:47:11,878 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 31 states, 31 states have (on average 22.0) internal successors, (682), 31 states have internal predecessors, (682), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 11:47:11,879 INFO L81 ComplementDD]: Finished complementDD. Result has 31 states, 31 states have (on average 22.0) internal successors, (682), 31 states have internal predecessors, (682), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 11:47:11,879 INFO L175 Difference]: Start difference. First operand has 110 places, 179 transitions, 1392 flow. Second operand 30 states and 278 transitions. [2023-11-26 11:47:11,879 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 134 places, 273 transitions, 2502 flow [2023-11-26 11:47:11,913 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 124 places, 273 transitions, 2377 flow, removed 32 selfloop flow, removed 10 redundant places. [2023-11-26 11:47:11,927 INFO L231 Difference]: Finished difference. Result has 131 places, 182 transitions, 1657 flow [2023-11-26 11:47:11,927 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=22, PETRI_DIFFERENCE_MINUEND_FLOW=1312, PETRI_DIFFERENCE_MINUEND_PLACES=95, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=179, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=118, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=56, PETRI_DIFFERENCE_SUBTRAHEND_STATES=30, PETRI_FLOW=1657, PETRI_PLACES=131, PETRI_TRANSITIONS=182} [2023-11-26 11:47:11,930 INFO L281 CegarLoopForPetriNet]: 24 programPoint places, 107 predicate places. [2023-11-26 11:47:11,930 INFO L495 AbstractCegarLoop]: Abstraction has has 131 places, 182 transitions, 1657 flow [2023-11-26 11:47:11,930 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 4.958333333333333) internal successors, (119), 24 states have internal predecessors, (119), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 11:47:11,930 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-26 11:47:11,930 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-26 11:47:11,941 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_efe2ab4f-2cfc-4214-b362-87e4b63bce63/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2023-11-26 11:47:12,136 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_efe2ab4f-2cfc-4214-b362-87e4b63bce63/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-26 11:47:12,139 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-26 11:47:12,141 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 11:47:12,141 INFO L85 PathProgramCache]: Analyzing trace with hash 83752113, now seen corresponding path program 4 times [2023-11-26 11:47:12,141 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 11:47:12,142 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [143681475] [2023-11-26 11:47:12,142 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 11:47:12,142 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 11:47:12,161 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 11:47:12,430 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-26 11:47:12,430 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 11:47:12,431 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [143681475] [2023-11-26 11:47:12,431 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [143681475] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-26 11:47:12,431 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [348606209] [2023-11-26 11:47:12,431 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-11-26 11:47:12,431 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-26 11:47:12,432 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_efe2ab4f-2cfc-4214-b362-87e4b63bce63/bin/uautomizer-verify-VRDe98Ueme/z3 [2023-11-26 11:47:12,433 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_efe2ab4f-2cfc-4214-b362-87e4b63bce63/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-26 11:47:12,452 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_efe2ab4f-2cfc-4214-b362-87e4b63bce63/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-11-26 11:47:12,513 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-11-26 11:47:12,513 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-26 11:47:12,515 INFO L262 TraceCheckSpWp]: Trace formula consists of 125 conjuncts, 14 conjunts are in the unsatisfiable core [2023-11-26 11:47:12,516 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-26 11:47:12,773 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-26 11:47:12,774 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-26 11:47:13,352 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-26 11:47:13,352 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [348606209] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-26 11:47:13,353 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-26 11:47:13,353 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 10] total 23 [2023-11-26 11:47:13,353 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2129939275] [2023-11-26 11:47:13,353 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-26 11:47:13,354 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2023-11-26 11:47:13,354 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-26 11:47:13,355 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2023-11-26 11:47:13,356 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=125, Invalid=427, Unknown=0, NotChecked=0, Total=552 [2023-11-26 11:47:13,364 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 22 [2023-11-26 11:47:13,365 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 131 places, 182 transitions, 1657 flow. Second operand has 24 states, 24 states have (on average 4.791666666666667) internal successors, (115), 24 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 11:47:13,365 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-26 11:47:13,365 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 22 [2023-11-26 11:47:13,365 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-26 11:47:15,578 INFO L124 PetriNetUnfolderBase]: 852/1558 cut-off events. [2023-11-26 11:47:15,579 INFO L125 PetriNetUnfolderBase]: For 7114/7114 co-relation queries the response was YES. [2023-11-26 11:47:15,592 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7802 conditions, 1558 events. 852/1558 cut-off events. For 7114/7114 co-relation queries the response was YES. Maximal size of possible extension queue 89. Compared 8085 event pairs, 30 based on Foata normal form. 3/1561 useless extension candidates. Maximal degree in co-relation 7709. Up to 349 conditions per place. [2023-11-26 11:47:15,605 INFO L140 encePairwiseOnDemand]: 10/22 looper letters, 165 selfloop transitions, 204 changer transitions 21/391 dead transitions. [2023-11-26 11:47:15,606 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 163 places, 391 transitions, 4084 flow [2023-11-26 11:47:15,606 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2023-11-26 11:47:15,606 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 37 states. [2023-11-26 11:47:15,609 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 353 transitions. [2023-11-26 11:47:15,610 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43366093366093367 [2023-11-26 11:47:15,610 INFO L72 ComplementDD]: Start complementDD. Operand 37 states and 353 transitions. [2023-11-26 11:47:15,610 INFO L73 IsDeterministic]: Start isDeterministic. Operand 37 states and 353 transitions. [2023-11-26 11:47:15,611 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-26 11:47:15,613 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 37 states and 353 transitions. [2023-11-26 11:47:15,618 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 38 states, 37 states have (on average 9.54054054054054) internal successors, (353), 37 states have internal predecessors, (353), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 11:47:15,621 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 38 states, 38 states have (on average 22.0) internal successors, (836), 38 states have internal predecessors, (836), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 11:47:15,622 INFO L81 ComplementDD]: Finished complementDD. Result has 38 states, 38 states have (on average 22.0) internal successors, (836), 38 states have internal predecessors, (836), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 11:47:15,622 INFO L175 Difference]: Start difference. First operand has 131 places, 182 transitions, 1657 flow. Second operand 37 states and 353 transitions. [2023-11-26 11:47:15,622 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 163 places, 391 transitions, 4084 flow [2023-11-26 11:47:15,678 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 142 places, 391 transitions, 3763 flow, removed 44 selfloop flow, removed 21 redundant places. [2023-11-26 11:47:15,686 INFO L231 Difference]: Finished difference. Result has 156 places, 274 transitions, 2988 flow [2023-11-26 11:47:15,687 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=22, PETRI_DIFFERENCE_MINUEND_FLOW=1466, PETRI_DIFFERENCE_MINUEND_PLACES=106, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=182, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=124, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=47, PETRI_DIFFERENCE_SUBTRAHEND_STATES=37, PETRI_FLOW=2988, PETRI_PLACES=156, PETRI_TRANSITIONS=274} [2023-11-26 11:47:15,688 INFO L281 CegarLoopForPetriNet]: 24 programPoint places, 132 predicate places. [2023-11-26 11:47:15,688 INFO L495 AbstractCegarLoop]: Abstraction has has 156 places, 274 transitions, 2988 flow [2023-11-26 11:47:15,688 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 4.791666666666667) internal successors, (115), 24 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 11:47:15,688 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-26 11:47:15,689 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-26 11:47:15,698 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_efe2ab4f-2cfc-4214-b362-87e4b63bce63/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2023-11-26 11:47:15,895 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_efe2ab4f-2cfc-4214-b362-87e4b63bce63/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-26 11:47:15,895 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-26 11:47:15,895 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 11:47:15,895 INFO L85 PathProgramCache]: Analyzing trace with hash 1470483625, now seen corresponding path program 5 times [2023-11-26 11:47:15,896 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 11:47:15,896 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1415598818] [2023-11-26 11:47:15,896 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 11:47:15,896 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 11:47:15,908 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 11:47:16,026 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-26 11:47:16,026 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 11:47:16,027 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1415598818] [2023-11-26 11:47:16,027 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1415598818] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-26 11:47:16,027 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [383728693] [2023-11-26 11:47:16,027 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-11-26 11:47:16,028 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-26 11:47:16,028 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_efe2ab4f-2cfc-4214-b362-87e4b63bce63/bin/uautomizer-verify-VRDe98Ueme/z3 [2023-11-26 11:47:16,033 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_efe2ab4f-2cfc-4214-b362-87e4b63bce63/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-26 11:47:16,060 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_efe2ab4f-2cfc-4214-b362-87e4b63bce63/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-11-26 11:47:16,128 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2023-11-26 11:47:16,128 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-26 11:47:16,130 INFO L262 TraceCheckSpWp]: Trace formula consists of 125 conjuncts, 4 conjunts are in the unsatisfiable core [2023-11-26 11:47:16,131 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-26 11:47:16,171 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-26 11:47:16,172 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-26 11:47:16,260 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-26 11:47:16,260 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [383728693] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-26 11:47:16,260 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-26 11:47:16,260 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 8 [2023-11-26 11:47:16,261 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1179359575] [2023-11-26 11:47:16,261 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-26 11:47:16,262 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2023-11-26 11:47:16,262 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-26 11:47:16,263 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2023-11-26 11:47:16,263 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2023-11-26 11:47:16,263 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 22 [2023-11-26 11:47:16,263 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 156 places, 274 transitions, 2988 flow. Second operand has 9 states, 9 states have (on average 7.333333333333333) internal successors, (66), 9 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 11:47:16,264 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-26 11:47:16,264 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 22 [2023-11-26 11:47:16,264 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-26 11:47:16,659 INFO L124 PetriNetUnfolderBase]: 857/1573 cut-off events. [2023-11-26 11:47:16,659 INFO L125 PetriNetUnfolderBase]: For 10249/10253 co-relation queries the response was YES. [2023-11-26 11:47:16,674 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8891 conditions, 1573 events. 857/1573 cut-off events. For 10249/10253 co-relation queries the response was YES. Maximal size of possible extension queue 87. Compared 8182 event pairs, 46 based on Foata normal form. 30/1600 useless extension candidates. Maximal degree in co-relation 8797. Up to 783 conditions per place. [2023-11-26 11:47:16,689 INFO L140 encePairwiseOnDemand]: 16/22 looper letters, 178 selfloop transitions, 122 changer transitions 1/334 dead transitions. [2023-11-26 11:47:16,689 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 154 places, 334 transitions, 4163 flow [2023-11-26 11:47:16,689 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-11-26 11:47:16,689 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-11-26 11:47:16,690 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 67 transitions. [2023-11-26 11:47:16,690 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5075757575757576 [2023-11-26 11:47:16,690 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 67 transitions. [2023-11-26 11:47:16,691 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 67 transitions. [2023-11-26 11:47:16,691 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-26 11:47:16,691 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 67 transitions. [2023-11-26 11:47:16,691 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 11.166666666666666) internal successors, (67), 6 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 11:47:16,692 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 22.0) internal successors, (154), 7 states have internal predecessors, (154), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 11:47:16,692 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 22.0) internal successors, (154), 7 states have internal predecessors, (154), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 11:47:16,692 INFO L175 Difference]: Start difference. First operand has 156 places, 274 transitions, 2988 flow. Second operand 6 states and 67 transitions. [2023-11-26 11:47:16,692 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 154 places, 334 transitions, 4163 flow [2023-11-26 11:47:16,848 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 142 places, 334 transitions, 3873 flow, removed 83 selfloop flow, removed 12 redundant places. [2023-11-26 11:47:16,856 INFO L231 Difference]: Finished difference. Result has 146 places, 294 transitions, 3490 flow [2023-11-26 11:47:16,857 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=22, PETRI_DIFFERENCE_MINUEND_FLOW=2650, PETRI_DIFFERENCE_MINUEND_PLACES=137, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=267, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=95, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=161, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=3490, PETRI_PLACES=146, PETRI_TRANSITIONS=294} [2023-11-26 11:47:16,857 INFO L281 CegarLoopForPetriNet]: 24 programPoint places, 122 predicate places. [2023-11-26 11:47:16,858 INFO L495 AbstractCegarLoop]: Abstraction has has 146 places, 294 transitions, 3490 flow [2023-11-26 11:47:16,858 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 7.333333333333333) internal successors, (66), 9 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 11:47:16,858 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-26 11:47:16,858 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-26 11:47:16,865 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_efe2ab4f-2cfc-4214-b362-87e4b63bce63/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2023-11-26 11:47:17,064 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_efe2ab4f-2cfc-4214-b362-87e4b63bce63/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-26 11:47:17,065 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-26 11:47:17,065 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 11:47:17,065 INFO L85 PathProgramCache]: Analyzing trace with hash 1243559239, now seen corresponding path program 6 times [2023-11-26 11:47:17,065 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 11:47:17,065 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [937617618] [2023-11-26 11:47:17,066 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 11:47:17,066 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 11:47:17,086 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 11:47:17,377 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-26 11:47:17,378 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 11:47:17,378 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [937617618] [2023-11-26 11:47:17,378 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [937617618] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-26 11:47:17,378 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [490517350] [2023-11-26 11:47:17,378 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-11-26 11:47:17,379 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-26 11:47:17,379 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_efe2ab4f-2cfc-4214-b362-87e4b63bce63/bin/uautomizer-verify-VRDe98Ueme/z3 [2023-11-26 11:47:17,381 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_efe2ab4f-2cfc-4214-b362-87e4b63bce63/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-26 11:47:17,383 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_efe2ab4f-2cfc-4214-b362-87e4b63bce63/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2023-11-26 11:47:17,469 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2023-11-26 11:47:17,469 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-26 11:47:17,471 INFO L262 TraceCheckSpWp]: Trace formula consists of 125 conjuncts, 12 conjunts are in the unsatisfiable core [2023-11-26 11:47:17,472 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-26 11:47:17,721 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-26 11:47:17,721 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-26 11:47:18,284 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-26 11:47:18,284 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [490517350] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-26 11:47:18,284 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-26 11:47:18,284 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 23 [2023-11-26 11:47:18,285 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [550303430] [2023-11-26 11:47:18,285 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-26 11:47:18,285 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2023-11-26 11:47:18,286 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-26 11:47:18,287 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2023-11-26 11:47:18,287 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=119, Invalid=433, Unknown=0, NotChecked=0, Total=552 [2023-11-26 11:47:18,297 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 22 [2023-11-26 11:47:18,298 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 146 places, 294 transitions, 3490 flow. Second operand has 24 states, 24 states have (on average 5.0) internal successors, (120), 24 states have internal predecessors, (120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 11:47:18,298 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-26 11:47:18,298 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 22 [2023-11-26 11:47:18,298 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-26 11:47:19,634 INFO L124 PetriNetUnfolderBase]: 1206/2161 cut-off events. [2023-11-26 11:47:19,634 INFO L125 PetriNetUnfolderBase]: For 14192/14192 co-relation queries the response was YES. [2023-11-26 11:47:19,655 INFO L83 FinitePrefix]: Finished finitePrefix Result has 12839 conditions, 2161 events. 1206/2161 cut-off events. For 14192/14192 co-relation queries the response was YES. Maximal size of possible extension queue 132. Compared 11862 event pairs, 45 based on Foata normal form. 2/2147 useless extension candidates. Maximal degree in co-relation 12560. Up to 1037 conditions per place. [2023-11-26 11:47:19,679 INFO L140 encePairwiseOnDemand]: 10/22 looper letters, 198 selfloop transitions, 241 changer transitions 26/466 dead transitions. [2023-11-26 11:47:19,680 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 166 places, 466 transitions, 6176 flow [2023-11-26 11:47:19,681 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2023-11-26 11:47:19,681 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2023-11-26 11:47:19,682 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 191 transitions. [2023-11-26 11:47:19,683 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4134199134199134 [2023-11-26 11:47:19,683 INFO L72 ComplementDD]: Start complementDD. Operand 21 states and 191 transitions. [2023-11-26 11:47:19,683 INFO L73 IsDeterministic]: Start isDeterministic. Operand 21 states and 191 transitions. [2023-11-26 11:47:19,683 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-26 11:47:19,684 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 21 states and 191 transitions. [2023-11-26 11:47:19,684 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 22 states, 21 states have (on average 9.095238095238095) internal successors, (191), 21 states have internal predecessors, (191), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 11:47:19,685 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 22 states, 22 states have (on average 22.0) internal successors, (484), 22 states have internal predecessors, (484), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 11:47:19,686 INFO L81 ComplementDD]: Finished complementDD. Result has 22 states, 22 states have (on average 22.0) internal successors, (484), 22 states have internal predecessors, (484), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 11:47:19,686 INFO L175 Difference]: Start difference. First operand has 146 places, 294 transitions, 3490 flow. Second operand 21 states and 191 transitions. [2023-11-26 11:47:19,686 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 166 places, 466 transitions, 6176 flow [2023-11-26 11:47:19,865 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 166 places, 466 transitions, 6164 flow, removed 6 selfloop flow, removed 0 redundant places. [2023-11-26 11:47:19,877 INFO L231 Difference]: Finished difference. Result has 179 places, 389 transitions, 5651 flow [2023-11-26 11:47:19,879 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=22, PETRI_DIFFERENCE_MINUEND_FLOW=3488, PETRI_DIFFERENCE_MINUEND_PLACES=146, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=294, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=156, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=101, PETRI_DIFFERENCE_SUBTRAHEND_STATES=21, PETRI_FLOW=5651, PETRI_PLACES=179, PETRI_TRANSITIONS=389} [2023-11-26 11:47:19,881 INFO L281 CegarLoopForPetriNet]: 24 programPoint places, 155 predicate places. [2023-11-26 11:47:19,881 INFO L495 AbstractCegarLoop]: Abstraction has has 179 places, 389 transitions, 5651 flow [2023-11-26 11:47:19,881 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 5.0) internal successors, (120), 24 states have internal predecessors, (120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 11:47:19,882 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-26 11:47:19,882 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-26 11:47:19,889 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_efe2ab4f-2cfc-4214-b362-87e4b63bce63/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2023-11-26 11:47:20,089 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_efe2ab4f-2cfc-4214-b362-87e4b63bce63/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-26 11:47:20,089 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-26 11:47:20,089 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 11:47:20,089 INFO L85 PathProgramCache]: Analyzing trace with hash 755950769, now seen corresponding path program 7 times [2023-11-26 11:47:20,090 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 11:47:20,090 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1601088873] [2023-11-26 11:47:20,090 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 11:47:20,090 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 11:47:20,106 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 11:47:20,372 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-26 11:47:20,372 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 11:47:20,372 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1601088873] [2023-11-26 11:47:20,373 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1601088873] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-26 11:47:20,373 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1512983796] [2023-11-26 11:47:20,373 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-11-26 11:47:20,373 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-26 11:47:20,373 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_efe2ab4f-2cfc-4214-b362-87e4b63bce63/bin/uautomizer-verify-VRDe98Ueme/z3 [2023-11-26 11:47:20,374 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_efe2ab4f-2cfc-4214-b362-87e4b63bce63/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-26 11:47:20,394 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_efe2ab4f-2cfc-4214-b362-87e4b63bce63/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2023-11-26 11:47:20,457 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 11:47:20,459 INFO L262 TraceCheckSpWp]: Trace formula consists of 125 conjuncts, 12 conjunts are in the unsatisfiable core [2023-11-26 11:47:20,460 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-26 11:47:20,755 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-26 11:47:20,756 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-26 11:47:21,361 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-26 11:47:21,362 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1512983796] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-26 11:47:21,362 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-26 11:47:21,362 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 23 [2023-11-26 11:47:21,363 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1451633119] [2023-11-26 11:47:21,363 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-26 11:47:21,363 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2023-11-26 11:47:21,364 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-26 11:47:21,364 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2023-11-26 11:47:21,365 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=134, Invalid=418, Unknown=0, NotChecked=0, Total=552 [2023-11-26 11:47:21,375 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 22 [2023-11-26 11:47:21,376 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 179 places, 389 transitions, 5651 flow. Second operand has 24 states, 24 states have (on average 4.875) internal successors, (117), 24 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 11:47:21,376 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-26 11:47:21,376 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 22 [2023-11-26 11:47:21,376 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-26 11:47:23,252 INFO L124 PetriNetUnfolderBase]: 1244/2211 cut-off events. [2023-11-26 11:47:23,253 INFO L125 PetriNetUnfolderBase]: For 20549/20549 co-relation queries the response was YES. [2023-11-26 11:47:23,277 INFO L83 FinitePrefix]: Finished finitePrefix Result has 15232 conditions, 2211 events. 1244/2211 cut-off events. For 20549/20549 co-relation queries the response was YES. Maximal size of possible extension queue 124. Compared 12009 event pairs, 36 based on Foata normal form. 1/2212 useless extension candidates. Maximal degree in co-relation 15132. Up to 1126 conditions per place. [2023-11-26 11:47:23,306 INFO L140 encePairwiseOnDemand]: 10/22 looper letters, 222 selfloop transitions, 279 changer transitions 9/511 dead transitions. [2023-11-26 11:47:23,306 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 201 places, 511 transitions, 7988 flow [2023-11-26 11:47:23,306 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2023-11-26 11:47:23,307 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2023-11-26 11:47:23,308 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 218 transitions. [2023-11-26 11:47:23,308 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3811188811188811 [2023-11-26 11:47:23,309 INFO L72 ComplementDD]: Start complementDD. Operand 26 states and 218 transitions. [2023-11-26 11:47:23,309 INFO L73 IsDeterministic]: Start isDeterministic. Operand 26 states and 218 transitions. [2023-11-26 11:47:23,309 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-26 11:47:23,309 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 26 states and 218 transitions. [2023-11-26 11:47:23,310 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 27 states, 26 states have (on average 8.384615384615385) internal successors, (218), 26 states have internal predecessors, (218), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 11:47:23,312 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 27 states, 27 states have (on average 22.0) internal successors, (594), 27 states have internal predecessors, (594), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 11:47:23,312 INFO L81 ComplementDD]: Finished complementDD. Result has 27 states, 27 states have (on average 22.0) internal successors, (594), 27 states have internal predecessors, (594), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 11:47:23,313 INFO L175 Difference]: Start difference. First operand has 179 places, 389 transitions, 5651 flow. Second operand 26 states and 218 transitions. [2023-11-26 11:47:23,313 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 201 places, 511 transitions, 7988 flow [2023-11-26 11:47:23,499 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 196 places, 511 transitions, 7915 flow, removed 31 selfloop flow, removed 5 redundant places. [2023-11-26 11:47:23,516 INFO L231 Difference]: Finished difference. Result has 205 places, 454 transitions, 7639 flow [2023-11-26 11:47:23,517 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=22, PETRI_DIFFERENCE_MINUEND_FLOW=5597, PETRI_DIFFERENCE_MINUEND_PLACES=171, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=389, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=215, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=130, PETRI_DIFFERENCE_SUBTRAHEND_STATES=26, PETRI_FLOW=7639, PETRI_PLACES=205, PETRI_TRANSITIONS=454} [2023-11-26 11:47:23,519 INFO L281 CegarLoopForPetriNet]: 24 programPoint places, 181 predicate places. [2023-11-26 11:47:23,519 INFO L495 AbstractCegarLoop]: Abstraction has has 205 places, 454 transitions, 7639 flow [2023-11-26 11:47:23,519 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 4.875) internal successors, (117), 24 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 11:47:23,520 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-26 11:47:23,520 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-26 11:47:23,531 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_efe2ab4f-2cfc-4214-b362-87e4b63bce63/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2023-11-26 11:47:23,726 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_efe2ab4f-2cfc-4214-b362-87e4b63bce63/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-26 11:47:23,727 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-26 11:47:23,727 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 11:47:23,727 INFO L85 PathProgramCache]: Analyzing trace with hash -522011885, now seen corresponding path program 8 times [2023-11-26 11:47:23,728 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 11:47:23,728 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [608033427] [2023-11-26 11:47:23,728 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 11:47:23,728 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 11:47:23,751 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 11:47:24,091 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-26 11:47:24,092 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 11:47:24,092 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [608033427] [2023-11-26 11:47:24,092 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [608033427] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-26 11:47:24,092 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1746373751] [2023-11-26 11:47:24,092 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-26 11:47:24,092 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-26 11:47:24,093 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_efe2ab4f-2cfc-4214-b362-87e4b63bce63/bin/uautomizer-verify-VRDe98Ueme/z3 [2023-11-26 11:47:24,094 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_efe2ab4f-2cfc-4214-b362-87e4b63bce63/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-26 11:47:24,129 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_efe2ab4f-2cfc-4214-b362-87e4b63bce63/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2023-11-26 11:47:24,187 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-11-26 11:47:24,187 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-26 11:47:24,188 INFO L262 TraceCheckSpWp]: Trace formula consists of 125 conjuncts, 12 conjunts are in the unsatisfiable core [2023-11-26 11:47:24,190 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-26 11:47:24,446 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-26 11:47:24,446 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-26 11:47:25,091 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-26 11:47:25,091 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1746373751] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-26 11:47:25,091 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-26 11:47:25,092 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 23 [2023-11-26 11:47:25,092 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1499249208] [2023-11-26 11:47:25,092 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-26 11:47:25,092 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2023-11-26 11:47:25,093 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-26 11:47:25,094 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2023-11-26 11:47:25,094 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=124, Invalid=428, Unknown=0, NotChecked=0, Total=552 [2023-11-26 11:47:25,110 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 22 [2023-11-26 11:47:25,110 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 205 places, 454 transitions, 7639 flow. Second operand has 24 states, 24 states have (on average 4.958333333333333) internal successors, (119), 24 states have internal predecessors, (119), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 11:47:25,110 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-26 11:47:25,110 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 22 [2023-11-26 11:47:25,111 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-26 11:47:26,741 INFO L124 PetriNetUnfolderBase]: 1283/2281 cut-off events. [2023-11-26 11:47:26,741 INFO L125 PetriNetUnfolderBase]: For 27296/27296 co-relation queries the response was YES. [2023-11-26 11:47:26,760 INFO L83 FinitePrefix]: Finished finitePrefix Result has 17773 conditions, 2281 events. 1283/2281 cut-off events. For 27296/27296 co-relation queries the response was YES. Maximal size of possible extension queue 129. Compared 12394 event pairs, 41 based on Foata normal form. 2/2283 useless extension candidates. Maximal degree in co-relation 17656. Up to 1076 conditions per place. [2023-11-26 11:47:26,780 INFO L140 encePairwiseOnDemand]: 10/22 looper letters, 242 selfloop transitions, 279 changer transitions 27/549 dead transitions. [2023-11-26 11:47:26,780 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 221 places, 549 transitions, 9942 flow [2023-11-26 11:47:26,780 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2023-11-26 11:47:26,780 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19 states. [2023-11-26 11:47:26,781 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 180 transitions. [2023-11-26 11:47:26,782 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.430622009569378 [2023-11-26 11:47:26,782 INFO L72 ComplementDD]: Start complementDD. Operand 19 states and 180 transitions. [2023-11-26 11:47:26,782 INFO L73 IsDeterministic]: Start isDeterministic. Operand 19 states and 180 transitions. [2023-11-26 11:47:26,783 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-26 11:47:26,783 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 19 states and 180 transitions. [2023-11-26 11:47:26,784 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 20 states, 19 states have (on average 9.473684210526315) internal successors, (180), 19 states have internal predecessors, (180), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 11:47:26,785 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 20 states, 20 states have (on average 22.0) internal successors, (440), 20 states have internal predecessors, (440), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 11:47:26,786 INFO L81 ComplementDD]: Finished complementDD. Result has 20 states, 20 states have (on average 22.0) internal successors, (440), 20 states have internal predecessors, (440), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 11:47:26,786 INFO L175 Difference]: Start difference. First operand has 205 places, 454 transitions, 7639 flow. Second operand 19 states and 180 transitions. [2023-11-26 11:47:26,786 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 221 places, 549 transitions, 9942 flow [2023-11-26 11:47:27,032 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 215 places, 549 transitions, 9757 flow, removed 77 selfloop flow, removed 6 redundant places. [2023-11-26 11:47:27,044 INFO L231 Difference]: Finished difference. Result has 225 places, 477 transitions, 8943 flow [2023-11-26 11:47:27,045 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=22, PETRI_DIFFERENCE_MINUEND_FLOW=7513, PETRI_DIFFERENCE_MINUEND_PLACES=197, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=454, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=248, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=193, PETRI_DIFFERENCE_SUBTRAHEND_STATES=19, PETRI_FLOW=8943, PETRI_PLACES=225, PETRI_TRANSITIONS=477} [2023-11-26 11:47:27,046 INFO L281 CegarLoopForPetriNet]: 24 programPoint places, 201 predicate places. [2023-11-26 11:47:27,046 INFO L495 AbstractCegarLoop]: Abstraction has has 225 places, 477 transitions, 8943 flow [2023-11-26 11:47:27,046 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 4.958333333333333) internal successors, (119), 24 states have internal predecessors, (119), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 11:47:27,046 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-26 11:47:27,047 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-26 11:47:27,052 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_efe2ab4f-2cfc-4214-b362-87e4b63bce63/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2023-11-26 11:47:27,248 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_efe2ab4f-2cfc-4214-b362-87e4b63bce63/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-26 11:47:27,249 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-26 11:47:27,249 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 11:47:27,249 INFO L85 PathProgramCache]: Analyzing trace with hash 805518513, now seen corresponding path program 9 times [2023-11-26 11:47:27,249 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 11:47:27,249 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [804724085] [2023-11-26 11:47:27,249 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 11:47:27,249 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 11:47:27,264 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 11:47:27,524 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-26 11:47:27,524 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 11:47:27,524 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [804724085] [2023-11-26 11:47:27,524 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [804724085] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-26 11:47:27,524 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [908359707] [2023-11-26 11:47:27,524 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-11-26 11:47:27,524 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-26 11:47:27,524 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_efe2ab4f-2cfc-4214-b362-87e4b63bce63/bin/uautomizer-verify-VRDe98Ueme/z3 [2023-11-26 11:47:27,525 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_efe2ab4f-2cfc-4214-b362-87e4b63bce63/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-26 11:47:27,528 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_efe2ab4f-2cfc-4214-b362-87e4b63bce63/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2023-11-26 11:47:27,607 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2023-11-26 11:47:27,607 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-26 11:47:27,608 INFO L262 TraceCheckSpWp]: Trace formula consists of 125 conjuncts, 12 conjunts are in the unsatisfiable core [2023-11-26 11:47:27,610 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-26 11:47:27,863 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-26 11:47:27,863 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-26 11:47:28,469 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-26 11:47:28,469 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [908359707] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-26 11:47:28,470 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-26 11:47:28,470 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 23 [2023-11-26 11:47:28,470 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1109136391] [2023-11-26 11:47:28,471 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-26 11:47:28,471 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2023-11-26 11:47:28,472 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-26 11:47:28,473 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2023-11-26 11:47:28,473 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=135, Invalid=417, Unknown=0, NotChecked=0, Total=552 [2023-11-26 11:47:28,495 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 22 [2023-11-26 11:47:28,495 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 225 places, 477 transitions, 8943 flow. Second operand has 24 states, 24 states have (on average 4.875) internal successors, (117), 24 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 11:47:28,495 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-26 11:47:28,496 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 22 [2023-11-26 11:47:28,496 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-26 11:47:30,430 INFO L124 PetriNetUnfolderBase]: 1322/2348 cut-off events. [2023-11-26 11:47:30,430 INFO L125 PetriNetUnfolderBase]: For 33953/33953 co-relation queries the response was YES. [2023-11-26 11:47:30,460 INFO L83 FinitePrefix]: Finished finitePrefix Result has 19897 conditions, 2348 events. 1322/2348 cut-off events. For 33953/33953 co-relation queries the response was YES. Maximal size of possible extension queue 135. Compared 12810 event pairs, 32 based on Foata normal form. 2/2350 useless extension candidates. Maximal degree in co-relation 19755. Up to 1099 conditions per place. [2023-11-26 11:47:30,481 INFO L140 encePairwiseOnDemand]: 10/22 looper letters, 259 selfloop transitions, 345 changer transitions 17/622 dead transitions. [2023-11-26 11:47:30,482 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 250 places, 622 transitions, 12147 flow [2023-11-26 11:47:30,482 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2023-11-26 11:47:30,482 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2023-11-26 11:47:30,484 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 271 transitions. [2023-11-26 11:47:30,484 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3849431818181818 [2023-11-26 11:47:30,485 INFO L72 ComplementDD]: Start complementDD. Operand 32 states and 271 transitions. [2023-11-26 11:47:30,485 INFO L73 IsDeterministic]: Start isDeterministic. Operand 32 states and 271 transitions. [2023-11-26 11:47:30,485 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-26 11:47:30,485 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 32 states and 271 transitions. [2023-11-26 11:47:30,486 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 33 states, 32 states have (on average 8.46875) internal successors, (271), 32 states have internal predecessors, (271), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 11:47:30,488 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 33 states, 33 states have (on average 22.0) internal successors, (726), 33 states have internal predecessors, (726), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 11:47:30,489 INFO L81 ComplementDD]: Finished complementDD. Result has 33 states, 33 states have (on average 22.0) internal successors, (726), 33 states have internal predecessors, (726), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 11:47:30,489 INFO L175 Difference]: Start difference. First operand has 225 places, 477 transitions, 8943 flow. Second operand 32 states and 271 transitions. [2023-11-26 11:47:30,489 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 250 places, 622 transitions, 12147 flow [2023-11-26 11:47:30,826 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 241 places, 622 transitions, 11879 flow, removed 71 selfloop flow, removed 9 redundant places. [2023-11-26 11:47:30,844 INFO L231 Difference]: Finished difference. Result has 252 places, 543 transitions, 11337 flow [2023-11-26 11:47:30,845 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=22, PETRI_DIFFERENCE_MINUEND_FLOW=8757, PETRI_DIFFERENCE_MINUEND_PLACES=210, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=477, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=284, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=168, PETRI_DIFFERENCE_SUBTRAHEND_STATES=32, PETRI_FLOW=11337, PETRI_PLACES=252, PETRI_TRANSITIONS=543} [2023-11-26 11:47:30,846 INFO L281 CegarLoopForPetriNet]: 24 programPoint places, 228 predicate places. [2023-11-26 11:47:30,846 INFO L495 AbstractCegarLoop]: Abstraction has has 252 places, 543 transitions, 11337 flow [2023-11-26 11:47:30,846 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 4.875) internal successors, (117), 24 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 11:47:30,846 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-26 11:47:30,847 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-26 11:47:30,862 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_efe2ab4f-2cfc-4214-b362-87e4b63bce63/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2023-11-26 11:47:31,062 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_efe2ab4f-2cfc-4214-b362-87e4b63bce63/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2023-11-26 11:47:31,062 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-26 11:47:31,062 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 11:47:31,063 INFO L85 PathProgramCache]: Analyzing trace with hash 2055281171, now seen corresponding path program 10 times [2023-11-26 11:47:31,063 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 11:47:31,063 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1921657114] [2023-11-26 11:47:31,063 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 11:47:31,063 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 11:47:31,078 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 11:47:31,399 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-26 11:47:31,399 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 11:47:31,399 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1921657114] [2023-11-26 11:47:31,400 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1921657114] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-26 11:47:31,400 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1872824745] [2023-11-26 11:47:31,400 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-11-26 11:47:31,400 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-26 11:47:31,401 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_efe2ab4f-2cfc-4214-b362-87e4b63bce63/bin/uautomizer-verify-VRDe98Ueme/z3 [2023-11-26 11:47:31,405 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_efe2ab4f-2cfc-4214-b362-87e4b63bce63/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-26 11:47:31,446 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_efe2ab4f-2cfc-4214-b362-87e4b63bce63/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2023-11-26 11:47:31,507 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-11-26 11:47:31,507 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-26 11:47:31,509 INFO L262 TraceCheckSpWp]: Trace formula consists of 125 conjuncts, 12 conjunts are in the unsatisfiable core [2023-11-26 11:47:31,510 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-26 11:47:31,825 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-26 11:47:31,825 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-26 11:47:32,306 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-26 11:47:32,306 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1872824745] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-26 11:47:32,306 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-26 11:47:32,306 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 10] total 25 [2023-11-26 11:47:32,306 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [901139799] [2023-11-26 11:47:32,306 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-26 11:47:32,307 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2023-11-26 11:47:32,307 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-26 11:47:32,308 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2023-11-26 11:47:32,308 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=149, Invalid=501, Unknown=0, NotChecked=0, Total=650 [2023-11-26 11:47:32,335 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 22 [2023-11-26 11:47:32,336 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 252 places, 543 transitions, 11337 flow. Second operand has 26 states, 26 states have (on average 4.923076923076923) internal successors, (128), 26 states have internal predecessors, (128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 11:47:32,336 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-26 11:47:32,336 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 22 [2023-11-26 11:47:32,336 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-26 11:47:34,114 INFO L124 PetriNetUnfolderBase]: 1354/2401 cut-off events. [2023-11-26 11:47:34,114 INFO L125 PetriNetUnfolderBase]: For 41961/41961 co-relation queries the response was YES. [2023-11-26 11:47:34,132 INFO L83 FinitePrefix]: Finished finitePrefix Result has 22187 conditions, 2401 events. 1354/2401 cut-off events. For 41961/41961 co-relation queries the response was YES. Maximal size of possible extension queue 137. Compared 13157 event pairs, 23 based on Foata normal form. 1/2402 useless extension candidates. Maximal degree in co-relation 22049. Up to 1194 conditions per place. [2023-11-26 11:47:34,152 INFO L140 encePairwiseOnDemand]: 11/22 looper letters, 214 selfloop transitions, 405 changer transitions 5/625 dead transitions. [2023-11-26 11:47:34,152 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 271 places, 625 transitions, 13745 flow [2023-11-26 11:47:34,152 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2023-11-26 11:47:34,152 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23 states. [2023-11-26 11:47:34,153 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 189 transitions. [2023-11-26 11:47:34,154 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.37351778656126483 [2023-11-26 11:47:34,154 INFO L72 ComplementDD]: Start complementDD. Operand 23 states and 189 transitions. [2023-11-26 11:47:34,154 INFO L73 IsDeterministic]: Start isDeterministic. Operand 23 states and 189 transitions. [2023-11-26 11:47:34,154 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-26 11:47:34,155 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 23 states and 189 transitions. [2023-11-26 11:47:34,155 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 24 states, 23 states have (on average 8.217391304347826) internal successors, (189), 23 states have internal predecessors, (189), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 11:47:34,157 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 24 states, 24 states have (on average 22.0) internal successors, (528), 24 states have internal predecessors, (528), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 11:47:34,157 INFO L81 ComplementDD]: Finished complementDD. Result has 24 states, 24 states have (on average 22.0) internal successors, (528), 24 states have internal predecessors, (528), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 11:47:34,157 INFO L175 Difference]: Start difference. First operand has 252 places, 543 transitions, 11337 flow. Second operand 23 states and 189 transitions. [2023-11-26 11:47:34,157 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 271 places, 625 transitions, 13745 flow [2023-11-26 11:47:34,559 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 258 places, 625 transitions, 13352 flow, removed 101 selfloop flow, removed 13 redundant places. [2023-11-26 11:47:34,575 INFO L231 Difference]: Finished difference. Result has 265 places, 578 transitions, 13321 flow [2023-11-26 11:47:34,576 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=22, PETRI_DIFFERENCE_MINUEND_FLOW=10961, PETRI_DIFFERENCE_MINUEND_PLACES=236, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=543, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=369, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=166, PETRI_DIFFERENCE_SUBTRAHEND_STATES=23, PETRI_FLOW=13321, PETRI_PLACES=265, PETRI_TRANSITIONS=578} [2023-11-26 11:47:34,577 INFO L281 CegarLoopForPetriNet]: 24 programPoint places, 241 predicate places. [2023-11-26 11:47:34,577 INFO L495 AbstractCegarLoop]: Abstraction has has 265 places, 578 transitions, 13321 flow [2023-11-26 11:47:34,578 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 4.923076923076923) internal successors, (128), 26 states have internal predecessors, (128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 11:47:34,578 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-26 11:47:34,578 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-26 11:47:34,589 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_efe2ab4f-2cfc-4214-b362-87e4b63bce63/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2023-11-26 11:47:34,784 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_efe2ab4f-2cfc-4214-b362-87e4b63bce63/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2023-11-26 11:47:34,784 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-26 11:47:34,785 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 11:47:34,785 INFO L85 PathProgramCache]: Analyzing trace with hash 198407273, now seen corresponding path program 11 times [2023-11-26 11:47:34,785 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 11:47:34,785 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1521867462] [2023-11-26 11:47:34,785 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 11:47:34,785 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 11:47:34,799 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 11:47:35,117 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-26 11:47:35,118 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 11:47:35,118 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1521867462] [2023-11-26 11:47:35,118 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1521867462] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-26 11:47:35,118 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1250823320] [2023-11-26 11:47:35,118 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-11-26 11:47:35,118 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-26 11:47:35,118 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_efe2ab4f-2cfc-4214-b362-87e4b63bce63/bin/uautomizer-verify-VRDe98Ueme/z3 [2023-11-26 11:47:35,120 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_efe2ab4f-2cfc-4214-b362-87e4b63bce63/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-26 11:47:35,144 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_efe2ab4f-2cfc-4214-b362-87e4b63bce63/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2023-11-26 11:47:35,209 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2023-11-26 11:47:35,210 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-26 11:47:35,211 INFO L262 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 18 conjunts are in the unsatisfiable core [2023-11-26 11:47:35,213 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-26 11:47:35,573 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-26 11:47:35,573 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-26 11:47:36,344 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-26 11:47:36,345 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1250823320] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-26 11:47:36,345 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-26 11:47:36,345 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12, 12] total 33 [2023-11-26 11:47:36,345 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1681605536] [2023-11-26 11:47:36,345 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-26 11:47:36,346 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2023-11-26 11:47:36,346 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-26 11:47:36,347 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2023-11-26 11:47:36,348 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=164, Invalid=958, Unknown=0, NotChecked=0, Total=1122 [2023-11-26 11:47:36,364 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 22 [2023-11-26 11:47:36,365 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 265 places, 578 transitions, 13321 flow. Second operand has 34 states, 34 states have (on average 4.794117647058823) internal successors, (163), 34 states have internal predecessors, (163), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 11:47:36,365 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-26 11:47:36,365 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 22 [2023-11-26 11:47:36,365 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-26 11:47:41,108 INFO L124 PetriNetUnfolderBase]: 1982/3587 cut-off events. [2023-11-26 11:47:41,108 INFO L125 PetriNetUnfolderBase]: For 79009/79009 co-relation queries the response was YES. [2023-11-26 11:47:41,138 INFO L83 FinitePrefix]: Finished finitePrefix Result has 36337 conditions, 3587 events. 1982/3587 cut-off events. For 79009/79009 co-relation queries the response was YES. Maximal size of possible extension queue 153. Compared 21380 event pairs, 62 based on Foata normal form. 5/3592 useless extension candidates. Maximal degree in co-relation 36165. Up to 954 conditions per place. [2023-11-26 11:47:41,169 INFO L140 encePairwiseOnDemand]: 11/22 looper letters, 397 selfloop transitions, 564 changer transitions 34/996 dead transitions. [2023-11-26 11:47:41,169 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 325 places, 996 transitions, 22456 flow [2023-11-26 11:47:41,170 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 63 states. [2023-11-26 11:47:41,170 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 63 states. [2023-11-26 11:47:41,172 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 566 transitions. [2023-11-26 11:47:41,173 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4083694083694084 [2023-11-26 11:47:41,173 INFO L72 ComplementDD]: Start complementDD. Operand 63 states and 566 transitions. [2023-11-26 11:47:41,173 INFO L73 IsDeterministic]: Start isDeterministic. Operand 63 states and 566 transitions. [2023-11-26 11:47:41,174 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-26 11:47:41,174 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 63 states and 566 transitions. [2023-11-26 11:47:41,176 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 64 states, 63 states have (on average 8.984126984126984) internal successors, (566), 63 states have internal predecessors, (566), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 11:47:41,179 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 64 states, 64 states have (on average 22.0) internal successors, (1408), 64 states have internal predecessors, (1408), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 11:47:41,180 INFO L81 ComplementDD]: Finished complementDD. Result has 64 states, 64 states have (on average 22.0) internal successors, (1408), 64 states have internal predecessors, (1408), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 11:47:41,180 INFO L175 Difference]: Start difference. First operand has 265 places, 578 transitions, 13321 flow. Second operand 63 states and 566 transitions. [2023-11-26 11:47:41,180 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 325 places, 996 transitions, 22456 flow [2023-11-26 11:47:42,014 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 312 places, 996 transitions, 22132 flow, removed 116 selfloop flow, removed 13 redundant places. [2023-11-26 11:47:42,035 INFO L231 Difference]: Finished difference. Result has 335 places, 781 transitions, 20292 flow [2023-11-26 11:47:42,036 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=22, PETRI_DIFFERENCE_MINUEND_FLOW=13083, PETRI_DIFFERENCE_MINUEND_PLACES=250, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=578, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=383, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=168, PETRI_DIFFERENCE_SUBTRAHEND_STATES=63, PETRI_FLOW=20292, PETRI_PLACES=335, PETRI_TRANSITIONS=781} [2023-11-26 11:47:42,037 INFO L281 CegarLoopForPetriNet]: 24 programPoint places, 311 predicate places. [2023-11-26 11:47:42,037 INFO L495 AbstractCegarLoop]: Abstraction has has 335 places, 781 transitions, 20292 flow [2023-11-26 11:47:42,037 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 34 states have (on average 4.794117647058823) internal successors, (163), 34 states have internal predecessors, (163), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 11:47:42,038 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-26 11:47:42,038 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-26 11:47:42,043 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_efe2ab4f-2cfc-4214-b362-87e4b63bce63/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Ended with exit code 0 [2023-11-26 11:47:42,239 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_efe2ab4f-2cfc-4214-b362-87e4b63bce63/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2023-11-26 11:47:42,239 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-26 11:47:42,239 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 11:47:42,239 INFO L85 PathProgramCache]: Analyzing trace with hash -1593145921, now seen corresponding path program 12 times [2023-11-26 11:47:42,239 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 11:47:42,239 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [268997840] [2023-11-26 11:47:42,240 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 11:47:42,240 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 11:47:42,254 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 11:47:42,569 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-26 11:47:42,570 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 11:47:42,570 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [268997840] [2023-11-26 11:47:42,570 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [268997840] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-26 11:47:42,570 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [330551774] [2023-11-26 11:47:42,570 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-11-26 11:47:42,570 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-26 11:47:42,570 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_efe2ab4f-2cfc-4214-b362-87e4b63bce63/bin/uautomizer-verify-VRDe98Ueme/z3 [2023-11-26 11:47:42,573 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_efe2ab4f-2cfc-4214-b362-87e4b63bce63/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-26 11:47:42,585 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_efe2ab4f-2cfc-4214-b362-87e4b63bce63/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2023-11-26 11:47:42,675 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2023-11-26 11:47:42,675 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-26 11:47:42,676 INFO L262 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 18 conjunts are in the unsatisfiable core [2023-11-26 11:47:42,678 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-26 11:47:43,032 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-26 11:47:43,033 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-26 11:47:43,826 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-26 11:47:43,826 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [330551774] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-26 11:47:43,826 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-26 11:47:43,827 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12, 12] total 33 [2023-11-26 11:47:43,827 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2065028675] [2023-11-26 11:47:43,827 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-26 11:47:43,827 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2023-11-26 11:47:43,828 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-26 11:47:43,828 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2023-11-26 11:47:43,829 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=161, Invalid=961, Unknown=0, NotChecked=0, Total=1122 [2023-11-26 11:47:43,858 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 22 [2023-11-26 11:47:43,859 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 335 places, 781 transitions, 20292 flow. Second operand has 34 states, 34 states have (on average 4.794117647058823) internal successors, (163), 34 states have internal predecessors, (163), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 11:47:43,859 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-26 11:47:43,859 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 22 [2023-11-26 11:47:43,859 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand