./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_dfd6f313-13a5-4a5c-8388-2a25e6fd4e43/bin/uautomizer-verify-BQ2R08f2Ya/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dfd6f313-13a5-4a5c-8388-2a25e6fd4e43/bin/uautomizer-verify-BQ2R08f2Ya/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dfd6f313-13a5-4a5c-8388-2a25e6fd4e43/bin/uautomizer-verify-BQ2R08f2Ya/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dfd6f313-13a5-4a5c-8388-2a25e6fd4e43/bin/uautomizer-verify-BQ2R08f2Ya/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_dfd6f313-13a5-4a5c-8388-2a25e6fd4e43/bin/uautomizer-verify-BQ2R08f2Ya/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dfd6f313-13a5-4a5c-8388-2a25e6fd4e43/bin/uautomizer-verify-BQ2R08f2Ya --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 [2023-11-29 02:44:09,205 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-11-29 02:44:09,267 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dfd6f313-13a5-4a5c-8388-2a25e6fd4e43/bin/uautomizer-verify-BQ2R08f2Ya/config/svcomp-Reach-32bit-Automizer_Default.epf [2023-11-29 02:44:09,271 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-11-29 02:44:09,272 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-11-29 02:44:09,293 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-11-29 02:44:09,293 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-11-29 02:44:09,294 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-11-29 02:44:09,295 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2023-11-29 02:44:09,295 INFO L153 SettingsManager]: * Use memory slicer=true [2023-11-29 02:44:09,296 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-11-29 02:44:09,296 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-11-29 02:44:09,297 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-11-29 02:44:09,297 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-11-29 02:44:09,298 INFO L153 SettingsManager]: * Use SBE=true [2023-11-29 02:44:09,298 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-11-29 02:44:09,299 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-11-29 02:44:09,299 INFO L153 SettingsManager]: * sizeof long=4 [2023-11-29 02:44:09,300 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-11-29 02:44:09,300 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-11-29 02:44:09,300 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-11-29 02:44:09,301 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-11-29 02:44:09,301 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-11-29 02:44:09,302 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-11-29 02:44:09,302 INFO L153 SettingsManager]: * sizeof long double=12 [2023-11-29 02:44:09,302 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-11-29 02:44:09,303 INFO L153 SettingsManager]: * Use constant arrays=true [2023-11-29 02:44:09,303 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-11-29 02:44:09,304 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-11-29 02:44:09,304 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2023-11-29 02:44:09,304 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-11-29 02:44:09,305 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2023-11-29 02:44:09,305 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-11-29 02:44:09,305 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-11-29 02:44:09,305 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2023-11-29 02:44:09,306 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-11-29 02:44:09,306 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-11-29 02:44:09,306 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2023-11-29 02:44:09,306 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-11-29 02:44:09,306 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-11-29 02:44:09,306 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-11-29 02:44:09,307 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-11-29 02:44:09,307 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_dfd6f313-13a5-4a5c-8388-2a25e6fd4e43/bin/uautomizer-verify-BQ2R08f2Ya/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dfd6f313-13a5-4a5c-8388-2a25e6fd4e43/bin/uautomizer-verify-BQ2R08f2Ya Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 0ead2366baa94ec77674f75cd829f45857f5651e204e91d33a749a2af2868461 [2023-11-29 02:44:09,537 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-11-29 02:44:09,557 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-11-29 02:44:09,560 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-11-29 02:44:09,561 INFO L270 PluginConnector]: Initializing CDTParser... [2023-11-29 02:44:09,561 INFO L274 PluginConnector]: CDTParser initialized [2023-11-29 02:44:09,563 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dfd6f313-13a5-4a5c-8388-2a25e6fd4e43/bin/uautomizer-verify-BQ2R08f2Ya/../../sv-benchmarks/c/weaver/popl20-nonblocking-cntr-alt.wvr.c [2023-11-29 02:44:12,308 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-11-29 02:44:12,463 INFO L384 CDTParser]: Found 1 translation units. [2023-11-29 02:44:12,463 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dfd6f313-13a5-4a5c-8388-2a25e6fd4e43/sv-benchmarks/c/weaver/popl20-nonblocking-cntr-alt.wvr.c [2023-11-29 02:44:12,471 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dfd6f313-13a5-4a5c-8388-2a25e6fd4e43/bin/uautomizer-verify-BQ2R08f2Ya/data/b913a50a0/74ad5a57164640abb5405597b025eabc/FLAGa88434c10 [2023-11-29 02:44:12,483 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dfd6f313-13a5-4a5c-8388-2a25e6fd4e43/bin/uautomizer-verify-BQ2R08f2Ya/data/b913a50a0/74ad5a57164640abb5405597b025eabc [2023-11-29 02:44:12,485 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-11-29 02:44:12,487 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2023-11-29 02:44:12,488 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-11-29 02:44:12,488 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-11-29 02:44:12,492 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-11-29 02:44:12,493 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 29.11 02:44:12" (1/1) ... [2023-11-29 02:44:12,493 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@68e2d121 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 02:44:12, skipping insertion in model container [2023-11-29 02:44:12,494 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 29.11 02:44:12" (1/1) ... [2023-11-29 02:44:12,516 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-11-29 02:44:12,681 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_dfd6f313-13a5-4a5c-8388-2a25e6fd4e43/sv-benchmarks/c/weaver/popl20-nonblocking-cntr-alt.wvr.c[2124,2137] [2023-11-29 02:44:12,686 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-29 02:44:12,695 INFO L202 MainTranslator]: Completed pre-run [2023-11-29 02:44:12,715 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_dfd6f313-13a5-4a5c-8388-2a25e6fd4e43/sv-benchmarks/c/weaver/popl20-nonblocking-cntr-alt.wvr.c[2124,2137] [2023-11-29 02:44:12,716 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-29 02:44:12,724 WARN L675 CHandler]: The function __VERIFIER_atomic_begin is called, but not defined or handled by StandardFunctionHandler. [2023-11-29 02:44:12,724 WARN L675 CHandler]: The function __VERIFIER_atomic_end is called, but not defined or handled by StandardFunctionHandler. [2023-11-29 02:44:12,732 INFO L206 MainTranslator]: Completed translation [2023-11-29 02:44:12,733 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 02:44:12 WrapperNode [2023-11-29 02:44:12,733 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-11-29 02:44:12,734 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-11-29 02:44:12,734 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-11-29 02:44:12,735 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-11-29 02:44:12,742 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 02:44:12" (1/1) ... [2023-11-29 02:44:12,750 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 02:44:12" (1/1) ... [2023-11-29 02:44:12,769 INFO L138 Inliner]: procedures = 21, calls = 24, calls flagged for inlining = 4, calls inlined = 4, statements flattened = 58 [2023-11-29 02:44:12,769 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-11-29 02:44:12,770 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-11-29 02:44:12,770 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-11-29 02:44:12,770 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-11-29 02:44:12,781 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 02:44:12" (1/1) ... [2023-11-29 02:44:12,781 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 02:44:12" (1/1) ... [2023-11-29 02:44:12,784 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 02:44:12" (1/1) ... [2023-11-29 02:44:12,799 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]. [2023-11-29 02:44:12,799 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 02:44:12" (1/1) ... [2023-11-29 02:44:12,799 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 02:44:12" (1/1) ... [2023-11-29 02:44:12,805 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 02:44:12" (1/1) ... [2023-11-29 02:44:12,809 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 02:44:12" (1/1) ... [2023-11-29 02:44:12,810 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 02:44:12" (1/1) ... [2023-11-29 02:44:12,811 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 02:44:12" (1/1) ... [2023-11-29 02:44:12,814 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-11-29 02:44:12,815 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-11-29 02:44:12,815 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-11-29 02:44:12,815 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-11-29 02:44:12,816 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 02:44:12" (1/1) ... [2023-11-29 02:44:12,821 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2023-11-29 02:44:12,832 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dfd6f313-13a5-4a5c-8388-2a25e6fd4e43/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 02:44:12,844 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dfd6f313-13a5-4a5c-8388-2a25e6fd4e43/bin/uautomizer-verify-BQ2R08f2Ya/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (exit command is (exit), workingDir is null) [2023-11-29 02:44:12,853 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dfd6f313-13a5-4a5c-8388-2a25e6fd4e43/bin/uautomizer-verify-BQ2R08f2Ya/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Waiting until timeout for monitored process [2023-11-29 02:44:12,881 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-11-29 02:44:12,881 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2023-11-29 02:44:12,881 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2023-11-29 02:44:12,881 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2023-11-29 02:44:12,881 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2023-11-29 02:44:12,881 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2023-11-29 02:44:12,882 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#1 [2023-11-29 02:44:12,882 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#2 [2023-11-29 02:44:12,882 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-11-29 02:44:12,882 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#0 [2023-11-29 02:44:12,882 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#1 [2023-11-29 02:44:12,882 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#2 [2023-11-29 02:44:12,882 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2023-11-29 02:44:12,882 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2023-11-29 02:44:12,883 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-11-29 02:44:12,883 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-11-29 02:44:12,883 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#0 [2023-11-29 02:44:12,883 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#1 [2023-11-29 02:44:12,883 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#2 [2023-11-29 02:44:12,883 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-11-29 02:44:12,885 WARN L213 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement [2023-11-29 02:44:12,980 INFO L241 CfgBuilder]: Building ICFG [2023-11-29 02:44:12,982 INFO L267 CfgBuilder]: Building CFG for each procedure with an implementation [2023-11-29 02:44:13,147 INFO L282 CfgBuilder]: Performing block encoding [2023-11-29 02:44:13,297 INFO L304 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-11-29 02:44:13,298 INFO L309 CfgBuilder]: Removed 2 assume(true) statements. [2023-11-29 02:44:13,298 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 29.11 02:44:13 BoogieIcfgContainer [2023-11-29 02:44:13,299 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-11-29 02:44:13,301 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-11-29 02:44:13,301 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-11-29 02:44:13,304 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-11-29 02:44:13,304 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 29.11 02:44:12" (1/3) ... [2023-11-29 02:44:13,304 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@c5e384f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 29.11 02:44:13, skipping insertion in model container [2023-11-29 02:44:13,305 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 02:44:12" (2/3) ... [2023-11-29 02:44:13,305 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@c5e384f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 29.11 02:44:13, skipping insertion in model container [2023-11-29 02:44:13,305 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 29.11 02:44:13" (3/3) ... [2023-11-29 02:44:13,306 INFO L112 eAbstractionObserver]: Analyzing ICFG popl20-nonblocking-cntr-alt.wvr.c [2023-11-29 02:44:13,313 WARN L145 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2023-11-29 02:44:13,321 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-11-29 02:44:13,321 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-11-29 02:44:13,322 INFO L514 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-11-29 02:44:13,367 INFO L144 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2023-11-29 02:44:13,411 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 27 places, 22 transitions, 58 flow [2023-11-29 02:44:13,437 INFO L124 PetriNetUnfolderBase]: 2/20 cut-off events. [2023-11-29 02:44:13,437 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2023-11-29 02:44:13,440 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. [2023-11-29 02:44:13,440 INFO L82 GeneralOperation]: Start removeDead. Operand has 27 places, 22 transitions, 58 flow [2023-11-29 02:44:13,444 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 24 places, 19 transitions, 50 flow [2023-11-29 02:44:13,455 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-29 02:44:13,461 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;@55dfdf4a, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-11-29 02:44:13,461 INFO L358 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2023-11-29 02:44:13,472 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-11-29 02:44:13,472 INFO L124 PetriNetUnfolderBase]: 2/18 cut-off events. [2023-11-29 02:44:13,472 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2023-11-29 02:44:13,472 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 02:44:13,473 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 02:44:13,474 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-29 02:44:13,479 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 02:44:13,479 INFO L85 PathProgramCache]: Analyzing trace with hash 2041025963, now seen corresponding path program 1 times [2023-11-29 02:44:13,487 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 02:44:13,487 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1413010986] [2023-11-29 02:44:13,487 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 02:44:13,488 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 02:44:13,605 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 02:44:13,815 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 02:44:13,816 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 02:44:13,816 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1413010986] [2023-11-29 02:44:13,817 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1413010986] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 02:44:13,817 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-29 02:44:13,817 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-29 02:44:13,819 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1306241868] [2023-11-29 02:44:13,820 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 02:44:13,828 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-29 02:44:13,833 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 02:44:13,853 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-29 02:44:13,853 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-11-29 02:44:13,860 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 22 [2023-11-29 02:44:13,863 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) [2023-11-29 02:44:13,863 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 02:44:13,863 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 22 [2023-11-29 02:44:13,864 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 02:44:13,960 INFO L124 PetriNetUnfolderBase]: 65/136 cut-off events. [2023-11-29 02:44:13,960 INFO L125 PetriNetUnfolderBase]: For 12/12 co-relation queries the response was YES. [2023-11-29 02:44:13,962 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. [2023-11-29 02:44:13,964 INFO L140 encePairwiseOnDemand]: 18/22 looper letters, 21 selfloop transitions, 3 changer transitions 0/27 dead transitions. [2023-11-29 02:44:13,964 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 27 places, 27 transitions, 117 flow [2023-11-29 02:44:13,966 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-29 02:44:13,968 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-11-29 02:44:13,974 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 45 transitions. [2023-11-29 02:44:13,976 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5113636363636364 [2023-11-29 02:44:13,977 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 45 transitions. [2023-11-29 02:44:13,977 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 45 transitions. [2023-11-29 02:44:13,978 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 02:44:13,981 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 45 transitions. [2023-11-29 02:44:13,983 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) [2023-11-29 02:44:13,986 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) [2023-11-29 02:44:13,987 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) [2023-11-29 02:44:13,988 INFO L175 Difference]: Start difference. First operand has 24 places, 19 transitions, 50 flow. Second operand 4 states and 45 transitions. [2023-11-29 02:44:13,989 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 27 places, 27 transitions, 117 flow [2023-11-29 02:44:13,992 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 23 places, 27 transitions, 107 flow, removed 0 selfloop flow, removed 4 redundant places. [2023-11-29 02:44:13,994 INFO L231 Difference]: Finished difference. Result has 24 places, 20 transitions, 56 flow [2023-11-29 02:44:13,996 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} [2023-11-29 02:44:14,000 INFO L281 CegarLoopForPetriNet]: 24 programPoint places, 0 predicate places. [2023-11-29 02:44:14,000 INFO L495 AbstractCegarLoop]: Abstraction has has 24 places, 20 transitions, 56 flow [2023-11-29 02:44:14,000 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) [2023-11-29 02:44:14,000 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 02:44:14,000 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 02:44:14,001 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-11-29 02:44:14,001 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-29 02:44:14,001 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 02:44:14,002 INFO L85 PathProgramCache]: Analyzing trace with hash -1493584575, now seen corresponding path program 1 times [2023-11-29 02:44:14,002 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 02:44:14,002 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1878069799] [2023-11-29 02:44:14,002 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 02:44:14,002 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 02:44:14,020 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 02:44:14,119 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-29 02:44:14,119 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 02:44:14,119 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1878069799] [2023-11-29 02:44:14,120 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1878069799] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 02:44:14,120 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-29 02:44:14,120 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-29 02:44:14,120 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [18656564] [2023-11-29 02:44:14,120 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 02:44:14,122 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-29 02:44:14,122 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 02:44:14,123 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-29 02:44:14,123 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-11-29 02:44:14,127 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 22 [2023-11-29 02:44:14,127 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) [2023-11-29 02:44:14,127 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 02:44:14,128 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 22 [2023-11-29 02:44:14,128 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 02:44:14,207 INFO L124 PetriNetUnfolderBase]: 93/182 cut-off events. [2023-11-29 02:44:14,208 INFO L125 PetriNetUnfolderBase]: For 76/76 co-relation queries the response was YES. [2023-11-29 02:44:14,209 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. [2023-11-29 02:44:14,211 INFO L140 encePairwiseOnDemand]: 18/22 looper letters, 23 selfloop transitions, 3 changer transitions 0/29 dead transitions. [2023-11-29 02:44:14,211 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 27 places, 29 transitions, 137 flow [2023-11-29 02:44:14,211 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-29 02:44:14,211 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-11-29 02:44:14,212 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 45 transitions. [2023-11-29 02:44:14,212 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5113636363636364 [2023-11-29 02:44:14,212 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 45 transitions. [2023-11-29 02:44:14,213 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 45 transitions. [2023-11-29 02:44:14,213 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 02:44:14,213 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 45 transitions. [2023-11-29 02:44:14,214 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) [2023-11-29 02:44:14,214 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) [2023-11-29 02:44:14,215 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) [2023-11-29 02:44:14,215 INFO L175 Difference]: Start difference. First operand has 24 places, 20 transitions, 56 flow. Second operand 4 states and 45 transitions. [2023-11-29 02:44:14,215 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 27 places, 29 transitions, 137 flow [2023-11-29 02:44:14,216 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 25 places, 29 transitions, 131 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-11-29 02:44:14,217 INFO L231 Difference]: Finished difference. Result has 26 places, 21 transitions, 66 flow [2023-11-29 02:44:14,218 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} [2023-11-29 02:44:14,218 INFO L281 CegarLoopForPetriNet]: 24 programPoint places, 2 predicate places. [2023-11-29 02:44:14,219 INFO L495 AbstractCegarLoop]: Abstraction has has 26 places, 21 transitions, 66 flow [2023-11-29 02:44:14,219 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) [2023-11-29 02:44:14,219 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 02:44:14,219 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 02:44:14,219 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-11-29 02:44:14,220 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-29 02:44:14,220 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 02:44:14,220 INFO L85 PathProgramCache]: Analyzing trace with hash -474198347, now seen corresponding path program 1 times [2023-11-29 02:44:14,220 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 02:44:14,221 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1572128119] [2023-11-29 02:44:14,221 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 02:44:14,221 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 02:44:14,258 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 02:44:14,638 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 02:44:14,638 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 02:44:14,638 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1572128119] [2023-11-29 02:44:14,638 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1572128119] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 02:44:14,639 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1592906988] [2023-11-29 02:44:14,639 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 02:44:14,639 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 02:44:14,639 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dfd6f313-13a5-4a5c-8388-2a25e6fd4e43/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 02:44:14,640 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dfd6f313-13a5-4a5c-8388-2a25e6fd4e43/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 02:44:14,652 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dfd6f313-13a5-4a5c-8388-2a25e6fd4e43/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-11-29 02:44:14,739 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 02:44:14,741 INFO L262 TraceCheckSpWp]: Trace formula consists of 125 conjuncts, 12 conjunts are in the unsatisfiable core [2023-11-29 02:44:14,747 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 02:44:15,101 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 02:44:15,101 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 02:44:15,754 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 02:44:15,755 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1592906988] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 02:44:15,755 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 02:44:15,755 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 23 [2023-11-29 02:44:15,755 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1761222476] [2023-11-29 02:44:15,755 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 02:44:15,756 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2023-11-29 02:44:15,757 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 02:44:15,757 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2023-11-29 02:44:15,758 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=127, Invalid=425, Unknown=0, NotChecked=0, Total=552 [2023-11-29 02:44:15,766 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 22 [2023-11-29 02:44:15,767 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) [2023-11-29 02:44:15,767 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 02:44:15,767 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 22 [2023-11-29 02:44:15,767 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 02:44:17,376 INFO L124 PetriNetUnfolderBase]: 596/1052 cut-off events. [2023-11-29 02:44:17,377 INFO L125 PetriNetUnfolderBase]: For 267/267 co-relation queries the response was YES. [2023-11-29 02:44:17,380 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. [2023-11-29 02:44:17,388 INFO L140 encePairwiseOnDemand]: 10/22 looper letters, 133 selfloop transitions, 111 changer transitions 16/261 dead transitions. [2023-11-29 02:44:17,388 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 64 places, 261 transitions, 1286 flow [2023-11-29 02:44:17,388 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2023-11-29 02:44:17,389 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 39 states. [2023-11-29 02:44:17,392 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 363 transitions. [2023-11-29 02:44:17,393 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4230769230769231 [2023-11-29 02:44:17,393 INFO L72 ComplementDD]: Start complementDD. Operand 39 states and 363 transitions. [2023-11-29 02:44:17,394 INFO L73 IsDeterministic]: Start isDeterministic. Operand 39 states and 363 transitions. [2023-11-29 02:44:17,395 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 02:44:17,395 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 39 states and 363 transitions. [2023-11-29 02:44:17,397 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) [2023-11-29 02:44:17,401 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) [2023-11-29 02:44:17,402 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) [2023-11-29 02:44:17,402 INFO L175 Difference]: Start difference. First operand has 26 places, 21 transitions, 66 flow. Second operand 39 states and 363 transitions. [2023-11-29 02:44:17,402 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 64 places, 261 transitions, 1286 flow [2023-11-29 02:44:17,406 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 62 places, 261 transitions, 1272 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-11-29 02:44:17,410 INFO L231 Difference]: Finished difference. Result has 79 places, 150 transitions, 914 flow [2023-11-29 02:44:17,410 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} [2023-11-29 02:44:17,411 INFO L281 CegarLoopForPetriNet]: 24 programPoint places, 55 predicate places. [2023-11-29 02:44:17,411 INFO L495 AbstractCegarLoop]: Abstraction has has 79 places, 150 transitions, 914 flow [2023-11-29 02:44:17,412 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) [2023-11-29 02:44:17,412 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 02:44:17,412 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 02:44:17,423 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dfd6f313-13a5-4a5c-8388-2a25e6fd4e43/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-11-29 02:44:17,613 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dfd6f313-13a5-4a5c-8388-2a25e6fd4e43/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 02:44:17,613 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-29 02:44:17,613 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 02:44:17,613 INFO L85 PathProgramCache]: Analyzing trace with hash 2106595569, now seen corresponding path program 2 times [2023-11-29 02:44:17,614 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 02:44:17,614 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2008587102] [2023-11-29 02:44:17,614 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 02:44:17,614 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 02:44:17,632 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 02:44:17,886 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 02:44:17,886 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 02:44:17,886 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2008587102] [2023-11-29 02:44:17,887 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2008587102] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 02:44:17,887 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1067208819] [2023-11-29 02:44:17,887 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-29 02:44:17,887 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 02:44:17,888 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dfd6f313-13a5-4a5c-8388-2a25e6fd4e43/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 02:44:17,888 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dfd6f313-13a5-4a5c-8388-2a25e6fd4e43/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 02:44:17,891 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dfd6f313-13a5-4a5c-8388-2a25e6fd4e43/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-11-29 02:44:17,965 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-11-29 02:44:17,965 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-29 02:44:17,966 INFO L262 TraceCheckSpWp]: Trace formula consists of 125 conjuncts, 12 conjunts are in the unsatisfiable core [2023-11-29 02:44:17,968 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 02:44:18,180 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 02:44:18,180 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 02:44:18,728 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 02:44:18,729 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1067208819] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 02:44:18,729 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 02:44:18,729 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 23 [2023-11-29 02:44:18,729 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [90814332] [2023-11-29 02:44:18,729 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 02:44:18,730 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2023-11-29 02:44:18,730 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 02:44:18,731 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2023-11-29 02:44:18,732 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=119, Invalid=433, Unknown=0, NotChecked=0, Total=552 [2023-11-29 02:44:18,749 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 22 [2023-11-29 02:44:18,749 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) [2023-11-29 02:44:18,749 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 02:44:18,749 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 22 [2023-11-29 02:44:18,749 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 02:44:19,912 INFO L124 PetriNetUnfolderBase]: 687/1277 cut-off events. [2023-11-29 02:44:19,912 INFO L125 PetriNetUnfolderBase]: For 3089/3089 co-relation queries the response was YES. [2023-11-29 02:44:19,918 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. [2023-11-29 02:44:19,928 INFO L140 encePairwiseOnDemand]: 11/22 looper letters, 138 selfloop transitions, 115 changer transitions 32/286 dead transitions. [2023-11-29 02:44:19,929 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 104 places, 286 transitions, 2240 flow [2023-11-29 02:44:19,929 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2023-11-29 02:44:19,929 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2023-11-29 02:44:19,931 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 262 transitions. [2023-11-29 02:44:19,932 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44107744107744107 [2023-11-29 02:44:19,932 INFO L72 ComplementDD]: Start complementDD. Operand 27 states and 262 transitions. [2023-11-29 02:44:19,932 INFO L73 IsDeterministic]: Start isDeterministic. Operand 27 states and 262 transitions. [2023-11-29 02:44:19,933 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 02:44:19,933 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 27 states and 262 transitions. [2023-11-29 02:44:19,935 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) [2023-11-29 02:44:19,937 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) [2023-11-29 02:44:19,937 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) [2023-11-29 02:44:19,938 INFO L175 Difference]: Start difference. First operand has 79 places, 150 transitions, 914 flow. Second operand 27 states and 262 transitions. [2023-11-29 02:44:19,938 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 104 places, 286 transitions, 2240 flow [2023-11-29 02:44:19,981 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 101 places, 286 transitions, 2144 flow, removed 35 selfloop flow, removed 3 redundant places. [2023-11-29 02:44:19,988 INFO L231 Difference]: Finished difference. Result has 110 places, 179 transitions, 1392 flow [2023-11-29 02:44:19,989 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} [2023-11-29 02:44:19,990 INFO L281 CegarLoopForPetriNet]: 24 programPoint places, 86 predicate places. [2023-11-29 02:44:19,990 INFO L495 AbstractCegarLoop]: Abstraction has has 110 places, 179 transitions, 1392 flow [2023-11-29 02:44:19,990 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) [2023-11-29 02:44:19,991 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 02:44:19,991 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 02:44:19,996 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dfd6f313-13a5-4a5c-8388-2a25e6fd4e43/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2023-11-29 02:44:20,191 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dfd6f313-13a5-4a5c-8388-2a25e6fd4e43/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 02:44:20,192 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-29 02:44:20,192 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 02:44:20,192 INFO L85 PathProgramCache]: Analyzing trace with hash -1243778285, now seen corresponding path program 3 times [2023-11-29 02:44:20,192 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 02:44:20,193 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [428135439] [2023-11-29 02:44:20,193 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 02:44:20,193 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 02:44:20,213 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 02:44:20,484 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 02:44:20,484 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 02:44:20,485 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [428135439] [2023-11-29 02:44:20,485 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [428135439] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 02:44:20,485 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1130708044] [2023-11-29 02:44:20,485 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-11-29 02:44:20,485 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 02:44:20,486 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dfd6f313-13a5-4a5c-8388-2a25e6fd4e43/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 02:44:20,487 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dfd6f313-13a5-4a5c-8388-2a25e6fd4e43/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 02:44:20,489 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dfd6f313-13a5-4a5c-8388-2a25e6fd4e43/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-11-29 02:44:20,561 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2023-11-29 02:44:20,561 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-29 02:44:20,562 INFO L262 TraceCheckSpWp]: Trace formula consists of 125 conjuncts, 12 conjunts are in the unsatisfiable core [2023-11-29 02:44:20,564 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 02:44:20,786 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 02:44:20,786 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 02:44:21,304 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 02:44:21,304 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1130708044] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 02:44:21,304 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 02:44:21,304 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 23 [2023-11-29 02:44:21,304 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [801045433] [2023-11-29 02:44:21,304 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 02:44:21,305 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2023-11-29 02:44:21,305 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 02:44:21,306 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2023-11-29 02:44:21,306 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=117, Invalid=435, Unknown=0, NotChecked=0, Total=552 [2023-11-29 02:44:21,315 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 22 [2023-11-29 02:44:21,316 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) [2023-11-29 02:44:21,316 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 02:44:21,316 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 22 [2023-11-29 02:44:21,316 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 02:44:22,590 INFO L124 PetriNetUnfolderBase]: 653/1213 cut-off events. [2023-11-29 02:44:22,590 INFO L125 PetriNetUnfolderBase]: For 5186/5186 co-relation queries the response was YES. [2023-11-29 02:44:22,597 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. [2023-11-29 02:44:22,607 INFO L140 encePairwiseOnDemand]: 10/22 looper letters, 129 selfloop transitions, 124 changer transitions 19/273 dead transitions. [2023-11-29 02:44:22,607 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 134 places, 273 transitions, 2502 flow [2023-11-29 02:44:22,607 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2023-11-29 02:44:22,607 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2023-11-29 02:44:22,609 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 278 transitions. [2023-11-29 02:44:22,609 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4212121212121212 [2023-11-29 02:44:22,610 INFO L72 ComplementDD]: Start complementDD. Operand 30 states and 278 transitions. [2023-11-29 02:44:22,610 INFO L73 IsDeterministic]: Start isDeterministic. Operand 30 states and 278 transitions. [2023-11-29 02:44:22,610 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 02:44:22,610 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 30 states and 278 transitions. [2023-11-29 02:44:22,611 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) [2023-11-29 02:44:22,613 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) [2023-11-29 02:44:22,614 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) [2023-11-29 02:44:22,614 INFO L175 Difference]: Start difference. First operand has 110 places, 179 transitions, 1392 flow. Second operand 30 states and 278 transitions. [2023-11-29 02:44:22,614 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 134 places, 273 transitions, 2502 flow [2023-11-29 02:44:22,645 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 124 places, 273 transitions, 2377 flow, removed 32 selfloop flow, removed 10 redundant places. [2023-11-29 02:44:22,651 INFO L231 Difference]: Finished difference. Result has 131 places, 182 transitions, 1657 flow [2023-11-29 02:44:22,652 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} [2023-11-29 02:44:22,653 INFO L281 CegarLoopForPetriNet]: 24 programPoint places, 107 predicate places. [2023-11-29 02:44:22,653 INFO L495 AbstractCegarLoop]: Abstraction has has 131 places, 182 transitions, 1657 flow [2023-11-29 02:44:22,653 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) [2023-11-29 02:44:22,653 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 02:44:22,653 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 02:44:22,659 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dfd6f313-13a5-4a5c-8388-2a25e6fd4e43/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2023-11-29 02:44:22,854 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dfd6f313-13a5-4a5c-8388-2a25e6fd4e43/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 02:44:22,854 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-29 02:44:22,854 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 02:44:22,855 INFO L85 PathProgramCache]: Analyzing trace with hash 83752113, now seen corresponding path program 4 times [2023-11-29 02:44:22,855 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 02:44:22,855 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1729935689] [2023-11-29 02:44:22,855 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 02:44:22,855 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 02:44:22,872 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 02:44:23,103 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 02:44:23,104 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 02:44:23,104 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1729935689] [2023-11-29 02:44:23,104 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1729935689] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 02:44:23,104 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [10214982] [2023-11-29 02:44:23,104 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-11-29 02:44:23,104 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 02:44:23,104 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dfd6f313-13a5-4a5c-8388-2a25e6fd4e43/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 02:44:23,105 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dfd6f313-13a5-4a5c-8388-2a25e6fd4e43/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 02:44:23,106 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dfd6f313-13a5-4a5c-8388-2a25e6fd4e43/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-11-29 02:44:23,166 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-11-29 02:44:23,166 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-29 02:44:23,167 INFO L262 TraceCheckSpWp]: Trace formula consists of 125 conjuncts, 14 conjunts are in the unsatisfiable core [2023-11-29 02:44:23,169 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 02:44:23,347 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 02:44:23,347 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 02:44:23,784 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 02:44:23,785 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [10214982] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 02:44:23,785 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 02:44:23,785 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 10] total 23 [2023-11-29 02:44:23,785 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1679289286] [2023-11-29 02:44:23,785 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 02:44:23,786 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2023-11-29 02:44:23,786 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 02:44:23,787 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2023-11-29 02:44:23,787 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=125, Invalid=427, Unknown=0, NotChecked=0, Total=552 [2023-11-29 02:44:23,795 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 22 [2023-11-29 02:44:23,796 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) [2023-11-29 02:44:23,796 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 02:44:23,796 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 22 [2023-11-29 02:44:23,796 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 02:44:25,253 INFO L124 PetriNetUnfolderBase]: 852/1558 cut-off events. [2023-11-29 02:44:25,253 INFO L125 PetriNetUnfolderBase]: For 7114/7114 co-relation queries the response was YES. [2023-11-29 02:44:25,259 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. [2023-11-29 02:44:25,273 INFO L140 encePairwiseOnDemand]: 10/22 looper letters, 165 selfloop transitions, 204 changer transitions 21/391 dead transitions. [2023-11-29 02:44:25,274 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 163 places, 391 transitions, 4084 flow [2023-11-29 02:44:25,274 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2023-11-29 02:44:25,274 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 37 states. [2023-11-29 02:44:25,276 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 353 transitions. [2023-11-29 02:44:25,277 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43366093366093367 [2023-11-29 02:44:25,277 INFO L72 ComplementDD]: Start complementDD. Operand 37 states and 353 transitions. [2023-11-29 02:44:25,277 INFO L73 IsDeterministic]: Start isDeterministic. Operand 37 states and 353 transitions. [2023-11-29 02:44:25,278 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 02:44:25,278 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 37 states and 353 transitions. [2023-11-29 02:44:25,279 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) [2023-11-29 02:44:25,282 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) [2023-11-29 02:44:25,282 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) [2023-11-29 02:44:25,282 INFO L175 Difference]: Start difference. First operand has 131 places, 182 transitions, 1657 flow. Second operand 37 states and 353 transitions. [2023-11-29 02:44:25,283 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 163 places, 391 transitions, 4084 flow [2023-11-29 02:44:25,333 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 142 places, 391 transitions, 3763 flow, removed 44 selfloop flow, removed 21 redundant places. [2023-11-29 02:44:25,341 INFO L231 Difference]: Finished difference. Result has 156 places, 274 transitions, 2988 flow [2023-11-29 02:44:25,342 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} [2023-11-29 02:44:25,342 INFO L281 CegarLoopForPetriNet]: 24 programPoint places, 132 predicate places. [2023-11-29 02:44:25,343 INFO L495 AbstractCegarLoop]: Abstraction has has 156 places, 274 transitions, 2988 flow [2023-11-29 02:44:25,343 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) [2023-11-29 02:44:25,343 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 02:44:25,343 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 02:44:25,349 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dfd6f313-13a5-4a5c-8388-2a25e6fd4e43/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2023-11-29 02:44:25,548 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dfd6f313-13a5-4a5c-8388-2a25e6fd4e43/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 02:44:25,548 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-29 02:44:25,548 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 02:44:25,548 INFO L85 PathProgramCache]: Analyzing trace with hash 1470483625, now seen corresponding path program 5 times [2023-11-29 02:44:25,548 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 02:44:25,548 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [586986281] [2023-11-29 02:44:25,548 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 02:44:25,549 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 02:44:25,557 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 02:44:25,628 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 02:44:25,628 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 02:44:25,629 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [586986281] [2023-11-29 02:44:25,629 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [586986281] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 02:44:25,629 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [588956436] [2023-11-29 02:44:25,629 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-11-29 02:44:25,629 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 02:44:25,630 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dfd6f313-13a5-4a5c-8388-2a25e6fd4e43/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 02:44:25,631 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dfd6f313-13a5-4a5c-8388-2a25e6fd4e43/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 02:44:25,640 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dfd6f313-13a5-4a5c-8388-2a25e6fd4e43/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-11-29 02:44:25,705 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2023-11-29 02:44:25,705 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-29 02:44:25,706 INFO L262 TraceCheckSpWp]: Trace formula consists of 125 conjuncts, 4 conjunts are in the unsatisfiable core [2023-11-29 02:44:25,707 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 02:44:25,743 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 02:44:25,743 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 02:44:25,816 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 02:44:25,816 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [588956436] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 02:44:25,816 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 02:44:25,816 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 8 [2023-11-29 02:44:25,817 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [775368959] [2023-11-29 02:44:25,817 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 02:44:25,817 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2023-11-29 02:44:25,817 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 02:44:25,818 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2023-11-29 02:44:25,818 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2023-11-29 02:44:25,818 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 22 [2023-11-29 02:44:25,818 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) [2023-11-29 02:44:25,818 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 02:44:25,818 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 22 [2023-11-29 02:44:25,818 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 02:44:26,156 INFO L124 PetriNetUnfolderBase]: 857/1573 cut-off events. [2023-11-29 02:44:26,156 INFO L125 PetriNetUnfolderBase]: For 10249/10253 co-relation queries the response was YES. [2023-11-29 02:44:26,189 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. [2023-11-29 02:44:26,204 INFO L140 encePairwiseOnDemand]: 16/22 looper letters, 178 selfloop transitions, 122 changer transitions 1/334 dead transitions. [2023-11-29 02:44:26,204 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 154 places, 334 transitions, 4163 flow [2023-11-29 02:44:26,204 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-11-29 02:44:26,204 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-11-29 02:44:26,205 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 67 transitions. [2023-11-29 02:44:26,205 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5075757575757576 [2023-11-29 02:44:26,205 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 67 transitions. [2023-11-29 02:44:26,205 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 67 transitions. [2023-11-29 02:44:26,205 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 02:44:26,205 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 67 transitions. [2023-11-29 02:44:26,206 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) [2023-11-29 02:44:26,206 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) [2023-11-29 02:44:26,207 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) [2023-11-29 02:44:26,207 INFO L175 Difference]: Start difference. First operand has 156 places, 274 transitions, 2988 flow. Second operand 6 states and 67 transitions. [2023-11-29 02:44:26,207 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 154 places, 334 transitions, 4163 flow [2023-11-29 02:44:26,306 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 142 places, 334 transitions, 3873 flow, removed 83 selfloop flow, removed 12 redundant places. [2023-11-29 02:44:26,314 INFO L231 Difference]: Finished difference. Result has 146 places, 294 transitions, 3490 flow [2023-11-29 02:44:26,315 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} [2023-11-29 02:44:26,316 INFO L281 CegarLoopForPetriNet]: 24 programPoint places, 122 predicate places. [2023-11-29 02:44:26,316 INFO L495 AbstractCegarLoop]: Abstraction has has 146 places, 294 transitions, 3490 flow [2023-11-29 02:44:26,316 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) [2023-11-29 02:44:26,316 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 02:44:26,316 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 02:44:26,322 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dfd6f313-13a5-4a5c-8388-2a25e6fd4e43/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2023-11-29 02:44:26,520 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dfd6f313-13a5-4a5c-8388-2a25e6fd4e43/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 02:44:26,520 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-29 02:44:26,520 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 02:44:26,521 INFO L85 PathProgramCache]: Analyzing trace with hash 1243559239, now seen corresponding path program 6 times [2023-11-29 02:44:26,521 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 02:44:26,521 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [18431504] [2023-11-29 02:44:26,521 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 02:44:26,521 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 02:44:26,536 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 02:44:26,755 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 02:44:26,755 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 02:44:26,756 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [18431504] [2023-11-29 02:44:26,756 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [18431504] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 02:44:26,756 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [917625287] [2023-11-29 02:44:26,756 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-11-29 02:44:26,756 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 02:44:26,757 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dfd6f313-13a5-4a5c-8388-2a25e6fd4e43/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 02:44:26,759 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dfd6f313-13a5-4a5c-8388-2a25e6fd4e43/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 02:44:26,761 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dfd6f313-13a5-4a5c-8388-2a25e6fd4e43/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2023-11-29 02:44:26,830 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2023-11-29 02:44:26,830 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-29 02:44:26,831 INFO L262 TraceCheckSpWp]: Trace formula consists of 125 conjuncts, 12 conjunts are in the unsatisfiable core [2023-11-29 02:44:26,832 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 02:44:27,043 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 02:44:27,043 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 02:44:27,512 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 02:44:27,512 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [917625287] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 02:44:27,512 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 02:44:27,513 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 23 [2023-11-29 02:44:27,513 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [705111358] [2023-11-29 02:44:27,513 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 02:44:27,513 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2023-11-29 02:44:27,514 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 02:44:27,514 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2023-11-29 02:44:27,514 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=119, Invalid=433, Unknown=0, NotChecked=0, Total=552 [2023-11-29 02:44:27,524 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 22 [2023-11-29 02:44:27,524 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) [2023-11-29 02:44:27,524 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 02:44:27,524 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 22 [2023-11-29 02:44:27,524 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 02:44:28,456 INFO L124 PetriNetUnfolderBase]: 1206/2161 cut-off events. [2023-11-29 02:44:28,456 INFO L125 PetriNetUnfolderBase]: For 14192/14192 co-relation queries the response was YES. [2023-11-29 02:44:28,462 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. [2023-11-29 02:44:28,477 INFO L140 encePairwiseOnDemand]: 10/22 looper letters, 198 selfloop transitions, 241 changer transitions 26/466 dead transitions. [2023-11-29 02:44:28,477 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 166 places, 466 transitions, 6176 flow [2023-11-29 02:44:28,477 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2023-11-29 02:44:28,477 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2023-11-29 02:44:28,478 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 191 transitions. [2023-11-29 02:44:28,478 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4134199134199134 [2023-11-29 02:44:28,478 INFO L72 ComplementDD]: Start complementDD. Operand 21 states and 191 transitions. [2023-11-29 02:44:28,479 INFO L73 IsDeterministic]: Start isDeterministic. Operand 21 states and 191 transitions. [2023-11-29 02:44:28,479 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 02:44:28,479 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 21 states and 191 transitions. [2023-11-29 02:44:28,480 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) [2023-11-29 02:44:28,480 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) [2023-11-29 02:44:28,481 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) [2023-11-29 02:44:28,481 INFO L175 Difference]: Start difference. First operand has 146 places, 294 transitions, 3490 flow. Second operand 21 states and 191 transitions. [2023-11-29 02:44:28,481 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 166 places, 466 transitions, 6176 flow [2023-11-29 02:44:28,544 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 166 places, 466 transitions, 6164 flow, removed 6 selfloop flow, removed 0 redundant places. [2023-11-29 02:44:28,552 INFO L231 Difference]: Finished difference. Result has 179 places, 389 transitions, 5651 flow [2023-11-29 02:44:28,552 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} [2023-11-29 02:44:28,553 INFO L281 CegarLoopForPetriNet]: 24 programPoint places, 155 predicate places. [2023-11-29 02:44:28,553 INFO L495 AbstractCegarLoop]: Abstraction has has 179 places, 389 transitions, 5651 flow [2023-11-29 02:44:28,553 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) [2023-11-29 02:44:28,553 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 02:44:28,553 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 02:44:28,558 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dfd6f313-13a5-4a5c-8388-2a25e6fd4e43/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2023-11-29 02:44:28,753 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dfd6f313-13a5-4a5c-8388-2a25e6fd4e43/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable7 [2023-11-29 02:44:28,754 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-29 02:44:28,754 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 02:44:28,754 INFO L85 PathProgramCache]: Analyzing trace with hash 755950769, now seen corresponding path program 7 times [2023-11-29 02:44:28,754 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 02:44:28,755 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1335453163] [2023-11-29 02:44:28,755 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 02:44:28,755 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 02:44:28,769 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 02:44:28,999 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 02:44:28,999 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 02:44:28,999 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1335453163] [2023-11-29 02:44:28,999 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1335453163] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 02:44:28,999 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1680538880] [2023-11-29 02:44:28,999 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-11-29 02:44:28,999 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 02:44:29,000 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dfd6f313-13a5-4a5c-8388-2a25e6fd4e43/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 02:44:29,000 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dfd6f313-13a5-4a5c-8388-2a25e6fd4e43/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 02:44:29,001 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dfd6f313-13a5-4a5c-8388-2a25e6fd4e43/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2023-11-29 02:44:29,059 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 02:44:29,060 INFO L262 TraceCheckSpWp]: Trace formula consists of 125 conjuncts, 12 conjunts are in the unsatisfiable core [2023-11-29 02:44:29,062 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 02:44:29,237 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 02:44:29,237 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 02:44:29,625 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 02:44:29,625 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1680538880] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 02:44:29,625 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 02:44:29,626 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 23 [2023-11-29 02:44:29,626 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [216199702] [2023-11-29 02:44:29,626 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 02:44:29,626 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2023-11-29 02:44:29,627 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 02:44:29,627 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2023-11-29 02:44:29,628 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=134, Invalid=418, Unknown=0, NotChecked=0, Total=552 [2023-11-29 02:44:29,636 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 22 [2023-11-29 02:44:29,637 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) [2023-11-29 02:44:29,637 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 02:44:29,637 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 22 [2023-11-29 02:44:29,637 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 02:44:30,825 INFO L124 PetriNetUnfolderBase]: 1244/2211 cut-off events. [2023-11-29 02:44:30,825 INFO L125 PetriNetUnfolderBase]: For 20549/20549 co-relation queries the response was YES. [2023-11-29 02:44:30,833 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. [2023-11-29 02:44:30,849 INFO L140 encePairwiseOnDemand]: 10/22 looper letters, 222 selfloop transitions, 279 changer transitions 9/511 dead transitions. [2023-11-29 02:44:30,849 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 201 places, 511 transitions, 7988 flow [2023-11-29 02:44:30,850 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2023-11-29 02:44:30,850 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2023-11-29 02:44:30,851 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 218 transitions. [2023-11-29 02:44:30,851 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3811188811188811 [2023-11-29 02:44:30,851 INFO L72 ComplementDD]: Start complementDD. Operand 26 states and 218 transitions. [2023-11-29 02:44:30,851 INFO L73 IsDeterministic]: Start isDeterministic. Operand 26 states and 218 transitions. [2023-11-29 02:44:30,851 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 02:44:30,852 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 26 states and 218 transitions. [2023-11-29 02:44:30,852 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) [2023-11-29 02:44:30,853 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) [2023-11-29 02:44:30,853 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) [2023-11-29 02:44:30,853 INFO L175 Difference]: Start difference. First operand has 179 places, 389 transitions, 5651 flow. Second operand 26 states and 218 transitions. [2023-11-29 02:44:30,853 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 201 places, 511 transitions, 7988 flow [2023-11-29 02:44:30,951 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 196 places, 511 transitions, 7915 flow, removed 31 selfloop flow, removed 5 redundant places. [2023-11-29 02:44:30,959 INFO L231 Difference]: Finished difference. Result has 205 places, 454 transitions, 7639 flow [2023-11-29 02:44:30,960 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} [2023-11-29 02:44:30,960 INFO L281 CegarLoopForPetriNet]: 24 programPoint places, 181 predicate places. [2023-11-29 02:44:30,961 INFO L495 AbstractCegarLoop]: Abstraction has has 205 places, 454 transitions, 7639 flow [2023-11-29 02:44:30,961 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) [2023-11-29 02:44:30,961 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 02:44:30,961 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 02:44:30,966 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dfd6f313-13a5-4a5c-8388-2a25e6fd4e43/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2023-11-29 02:44:31,161 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dfd6f313-13a5-4a5c-8388-2a25e6fd4e43/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable8 [2023-11-29 02:44:31,162 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-29 02:44:31,162 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 02:44:31,162 INFO L85 PathProgramCache]: Analyzing trace with hash -522011885, now seen corresponding path program 8 times [2023-11-29 02:44:31,162 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 02:44:31,162 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1586370513] [2023-11-29 02:44:31,162 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 02:44:31,162 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 02:44:31,174 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 02:44:31,395 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 02:44:31,395 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 02:44:31,395 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1586370513] [2023-11-29 02:44:31,396 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1586370513] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 02:44:31,396 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1403544407] [2023-11-29 02:44:31,396 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-29 02:44:31,396 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 02:44:31,396 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dfd6f313-13a5-4a5c-8388-2a25e6fd4e43/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 02:44:31,397 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dfd6f313-13a5-4a5c-8388-2a25e6fd4e43/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 02:44:31,404 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dfd6f313-13a5-4a5c-8388-2a25e6fd4e43/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2023-11-29 02:44:31,500 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-11-29 02:44:31,500 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-29 02:44:31,501 INFO L262 TraceCheckSpWp]: Trace formula consists of 125 conjuncts, 12 conjunts are in the unsatisfiable core [2023-11-29 02:44:31,502 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 02:44:31,669 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 02:44:31,669 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 02:44:32,130 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 02:44:32,130 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1403544407] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 02:44:32,130 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 02:44:32,130 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 23 [2023-11-29 02:44:32,131 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [246556543] [2023-11-29 02:44:32,131 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 02:44:32,131 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2023-11-29 02:44:32,131 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 02:44:32,132 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2023-11-29 02:44:32,132 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=124, Invalid=428, Unknown=0, NotChecked=0, Total=552 [2023-11-29 02:44:32,145 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 22 [2023-11-29 02:44:32,145 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) [2023-11-29 02:44:32,145 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 02:44:32,145 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 22 [2023-11-29 02:44:32,145 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 02:44:33,317 INFO L124 PetriNetUnfolderBase]: 1283/2281 cut-off events. [2023-11-29 02:44:33,317 INFO L125 PetriNetUnfolderBase]: For 27296/27296 co-relation queries the response was YES. [2023-11-29 02:44:33,325 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. [2023-11-29 02:44:33,336 INFO L140 encePairwiseOnDemand]: 10/22 looper letters, 242 selfloop transitions, 279 changer transitions 27/549 dead transitions. [2023-11-29 02:44:33,336 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 221 places, 549 transitions, 9942 flow [2023-11-29 02:44:33,336 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2023-11-29 02:44:33,337 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19 states. [2023-11-29 02:44:33,337 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 180 transitions. [2023-11-29 02:44:33,337 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.430622009569378 [2023-11-29 02:44:33,337 INFO L72 ComplementDD]: Start complementDD. Operand 19 states and 180 transitions. [2023-11-29 02:44:33,337 INFO L73 IsDeterministic]: Start isDeterministic. Operand 19 states and 180 transitions. [2023-11-29 02:44:33,338 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 02:44:33,338 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 19 states and 180 transitions. [2023-11-29 02:44:33,338 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) [2023-11-29 02:44:33,339 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) [2023-11-29 02:44:33,339 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) [2023-11-29 02:44:33,339 INFO L175 Difference]: Start difference. First operand has 205 places, 454 transitions, 7639 flow. Second operand 19 states and 180 transitions. [2023-11-29 02:44:33,339 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 221 places, 549 transitions, 9942 flow [2023-11-29 02:44:33,507 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 215 places, 549 transitions, 9757 flow, removed 77 selfloop flow, removed 6 redundant places. [2023-11-29 02:44:33,518 INFO L231 Difference]: Finished difference. Result has 225 places, 477 transitions, 8943 flow [2023-11-29 02:44:33,518 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} [2023-11-29 02:44:33,519 INFO L281 CegarLoopForPetriNet]: 24 programPoint places, 201 predicate places. [2023-11-29 02:44:33,519 INFO L495 AbstractCegarLoop]: Abstraction has has 225 places, 477 transitions, 8943 flow [2023-11-29 02:44:33,519 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) [2023-11-29 02:44:33,519 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 02:44:33,519 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 02:44:33,523 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dfd6f313-13a5-4a5c-8388-2a25e6fd4e43/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Ended with exit code 0 [2023-11-29 02:44:33,720 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dfd6f313-13a5-4a5c-8388-2a25e6fd4e43/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2023-11-29 02:44:33,720 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-29 02:44:33,720 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 02:44:33,720 INFO L85 PathProgramCache]: Analyzing trace with hash 805518513, now seen corresponding path program 9 times [2023-11-29 02:44:33,721 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 02:44:33,721 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1385998819] [2023-11-29 02:44:33,721 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 02:44:33,721 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 02:44:33,734 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 02:44:33,992 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 02:44:33,992 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 02:44:33,992 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1385998819] [2023-11-29 02:44:33,993 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1385998819] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 02:44:33,993 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1657323133] [2023-11-29 02:44:33,993 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-11-29 02:44:33,993 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 02:44:33,993 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dfd6f313-13a5-4a5c-8388-2a25e6fd4e43/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 02:44:33,994 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dfd6f313-13a5-4a5c-8388-2a25e6fd4e43/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 02:44:33,995 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dfd6f313-13a5-4a5c-8388-2a25e6fd4e43/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2023-11-29 02:44:34,066 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2023-11-29 02:44:34,066 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-29 02:44:34,067 INFO L262 TraceCheckSpWp]: Trace formula consists of 125 conjuncts, 12 conjunts are in the unsatisfiable core [2023-11-29 02:44:34,069 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 02:44:34,278 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 02:44:34,278 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 02:44:34,728 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 02:44:34,728 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1657323133] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 02:44:34,728 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 02:44:34,728 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 23 [2023-11-29 02:44:34,729 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [549558364] [2023-11-29 02:44:34,729 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 02:44:34,729 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2023-11-29 02:44:34,729 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 02:44:34,730 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2023-11-29 02:44:34,730 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=135, Invalid=417, Unknown=0, NotChecked=0, Total=552 [2023-11-29 02:44:34,745 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 22 [2023-11-29 02:44:34,746 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) [2023-11-29 02:44:34,746 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 02:44:34,746 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 22 [2023-11-29 02:44:34,746 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 02:44:36,268 INFO L124 PetriNetUnfolderBase]: 1322/2348 cut-off events. [2023-11-29 02:44:36,268 INFO L125 PetriNetUnfolderBase]: For 33953/33953 co-relation queries the response was YES. [2023-11-29 02:44:36,278 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. [2023-11-29 02:44:36,290 INFO L140 encePairwiseOnDemand]: 10/22 looper letters, 259 selfloop transitions, 345 changer transitions 17/622 dead transitions. [2023-11-29 02:44:36,290 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 250 places, 622 transitions, 12147 flow [2023-11-29 02:44:36,290 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2023-11-29 02:44:36,290 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2023-11-29 02:44:36,292 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 271 transitions. [2023-11-29 02:44:36,292 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3849431818181818 [2023-11-29 02:44:36,292 INFO L72 ComplementDD]: Start complementDD. Operand 32 states and 271 transitions. [2023-11-29 02:44:36,292 INFO L73 IsDeterministic]: Start isDeterministic. Operand 32 states and 271 transitions. [2023-11-29 02:44:36,292 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 02:44:36,293 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 32 states and 271 transitions. [2023-11-29 02:44:36,293 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) [2023-11-29 02:44:36,295 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) [2023-11-29 02:44:36,295 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) [2023-11-29 02:44:36,295 INFO L175 Difference]: Start difference. First operand has 225 places, 477 transitions, 8943 flow. Second operand 32 states and 271 transitions. [2023-11-29 02:44:36,295 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 250 places, 622 transitions, 12147 flow [2023-11-29 02:44:36,539 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 241 places, 622 transitions, 11879 flow, removed 71 selfloop flow, removed 9 redundant places. [2023-11-29 02:44:36,550 INFO L231 Difference]: Finished difference. Result has 252 places, 543 transitions, 11337 flow [2023-11-29 02:44:36,551 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} [2023-11-29 02:44:36,551 INFO L281 CegarLoopForPetriNet]: 24 programPoint places, 228 predicate places. [2023-11-29 02:44:36,551 INFO L495 AbstractCegarLoop]: Abstraction has has 252 places, 543 transitions, 11337 flow [2023-11-29 02:44:36,552 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) [2023-11-29 02:44:36,552 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 02:44:36,552 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 02:44:36,556 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dfd6f313-13a5-4a5c-8388-2a25e6fd4e43/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Ended with exit code 0 [2023-11-29 02:44:36,752 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dfd6f313-13a5-4a5c-8388-2a25e6fd4e43/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2023-11-29 02:44:36,752 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-29 02:44:36,752 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 02:44:36,753 INFO L85 PathProgramCache]: Analyzing trace with hash 2055281171, now seen corresponding path program 10 times [2023-11-29 02:44:36,753 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 02:44:36,753 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2064015992] [2023-11-29 02:44:36,753 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 02:44:36,753 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 02:44:36,766 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 02:44:36,961 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 02:44:36,961 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 02:44:36,961 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2064015992] [2023-11-29 02:44:36,961 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2064015992] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 02:44:36,961 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [143592389] [2023-11-29 02:44:36,962 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-11-29 02:44:36,962 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 02:44:36,962 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dfd6f313-13a5-4a5c-8388-2a25e6fd4e43/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 02:44:36,964 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dfd6f313-13a5-4a5c-8388-2a25e6fd4e43/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 02:44:36,968 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dfd6f313-13a5-4a5c-8388-2a25e6fd4e43/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2023-11-29 02:44:37,037 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-11-29 02:44:37,037 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-29 02:44:37,038 INFO L262 TraceCheckSpWp]: Trace formula consists of 125 conjuncts, 12 conjunts are in the unsatisfiable core [2023-11-29 02:44:37,040 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 02:44:37,305 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 02:44:37,305 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 02:44:37,675 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 02:44:37,675 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [143592389] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 02:44:37,676 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 02:44:37,676 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 10] total 25 [2023-11-29 02:44:37,676 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1535588069] [2023-11-29 02:44:37,676 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 02:44:37,676 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2023-11-29 02:44:37,677 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 02:44:37,677 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2023-11-29 02:44:37,677 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=149, Invalid=501, Unknown=0, NotChecked=0, Total=650 [2023-11-29 02:44:37,699 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 22 [2023-11-29 02:44:37,699 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) [2023-11-29 02:44:37,699 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 02:44:37,699 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 22 [2023-11-29 02:44:37,699 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 02:44:39,045 INFO L124 PetriNetUnfolderBase]: 1354/2401 cut-off events. [2023-11-29 02:44:39,045 INFO L125 PetriNetUnfolderBase]: For 41961/41961 co-relation queries the response was YES. [2023-11-29 02:44:39,057 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. [2023-11-29 02:44:39,069 INFO L140 encePairwiseOnDemand]: 11/22 looper letters, 214 selfloop transitions, 405 changer transitions 5/625 dead transitions. [2023-11-29 02:44:39,069 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 271 places, 625 transitions, 13745 flow [2023-11-29 02:44:39,070 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2023-11-29 02:44:39,070 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23 states. [2023-11-29 02:44:39,070 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 189 transitions. [2023-11-29 02:44:39,071 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.37351778656126483 [2023-11-29 02:44:39,071 INFO L72 ComplementDD]: Start complementDD. Operand 23 states and 189 transitions. [2023-11-29 02:44:39,071 INFO L73 IsDeterministic]: Start isDeterministic. Operand 23 states and 189 transitions. [2023-11-29 02:44:39,071 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 02:44:39,071 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 23 states and 189 transitions. [2023-11-29 02:44:39,072 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) [2023-11-29 02:44:39,073 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) [2023-11-29 02:44:39,073 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) [2023-11-29 02:44:39,073 INFO L175 Difference]: Start difference. First operand has 252 places, 543 transitions, 11337 flow. Second operand 23 states and 189 transitions. [2023-11-29 02:44:39,073 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 271 places, 625 transitions, 13745 flow [2023-11-29 02:44:39,411 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 258 places, 625 transitions, 13352 flow, removed 101 selfloop flow, removed 13 redundant places. [2023-11-29 02:44:39,426 INFO L231 Difference]: Finished difference. Result has 265 places, 578 transitions, 13321 flow [2023-11-29 02:44:39,427 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} [2023-11-29 02:44:39,428 INFO L281 CegarLoopForPetriNet]: 24 programPoint places, 241 predicate places. [2023-11-29 02:44:39,428 INFO L495 AbstractCegarLoop]: Abstraction has has 265 places, 578 transitions, 13321 flow [2023-11-29 02:44:39,428 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) [2023-11-29 02:44:39,428 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 02:44:39,428 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 02:44:39,432 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dfd6f313-13a5-4a5c-8388-2a25e6fd4e43/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Ended with exit code 0 [2023-11-29 02:44:39,629 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dfd6f313-13a5-4a5c-8388-2a25e6fd4e43/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2023-11-29 02:44:39,629 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-29 02:44:39,629 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 02:44:39,629 INFO L85 PathProgramCache]: Analyzing trace with hash 198407273, now seen corresponding path program 11 times [2023-11-29 02:44:39,629 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 02:44:39,629 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2011390983] [2023-11-29 02:44:39,629 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 02:44:39,630 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 02:44:39,642 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 02:44:39,867 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 02:44:39,867 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 02:44:39,867 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2011390983] [2023-11-29 02:44:39,868 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2011390983] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 02:44:39,868 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1727434922] [2023-11-29 02:44:39,868 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-11-29 02:44:39,868 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 02:44:39,868 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dfd6f313-13a5-4a5c-8388-2a25e6fd4e43/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 02:44:39,869 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dfd6f313-13a5-4a5c-8388-2a25e6fd4e43/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 02:44:39,871 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dfd6f313-13a5-4a5c-8388-2a25e6fd4e43/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2023-11-29 02:44:39,938 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2023-11-29 02:44:39,938 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-29 02:44:39,939 INFO L262 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 18 conjunts are in the unsatisfiable core [2023-11-29 02:44:39,941 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 02:44:40,203 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 02:44:40,204 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 02:44:40,814 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 02:44:40,815 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1727434922] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 02:44:40,815 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 02:44:40,815 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12, 12] total 33 [2023-11-29 02:44:40,815 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [477288368] [2023-11-29 02:44:40,815 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 02:44:40,815 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2023-11-29 02:44:40,816 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 02:44:40,816 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2023-11-29 02:44:40,817 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=164, Invalid=958, Unknown=0, NotChecked=0, Total=1122 [2023-11-29 02:44:40,826 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 22 [2023-11-29 02:44:40,826 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) [2023-11-29 02:44:40,826 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 02:44:40,826 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 22 [2023-11-29 02:44:40,826 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 02:44:44,648 INFO L124 PetriNetUnfolderBase]: 1982/3587 cut-off events. [2023-11-29 02:44:44,649 INFO L125 PetriNetUnfolderBase]: For 79009/79009 co-relation queries the response was YES. [2023-11-29 02:44:44,665 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. [2023-11-29 02:44:44,685 INFO L140 encePairwiseOnDemand]: 11/22 looper letters, 397 selfloop transitions, 564 changer transitions 34/996 dead transitions. [2023-11-29 02:44:44,685 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 325 places, 996 transitions, 22456 flow [2023-11-29 02:44:44,685 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 63 states. [2023-11-29 02:44:44,685 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 63 states. [2023-11-29 02:44:44,687 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 566 transitions. [2023-11-29 02:44:44,687 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4083694083694084 [2023-11-29 02:44:44,687 INFO L72 ComplementDD]: Start complementDD. Operand 63 states and 566 transitions. [2023-11-29 02:44:44,687 INFO L73 IsDeterministic]: Start isDeterministic. Operand 63 states and 566 transitions. [2023-11-29 02:44:44,688 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 02:44:44,688 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 63 states and 566 transitions. [2023-11-29 02:44:44,690 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) [2023-11-29 02:44:44,693 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) [2023-11-29 02:44:44,693 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) [2023-11-29 02:44:44,693 INFO L175 Difference]: Start difference. First operand has 265 places, 578 transitions, 13321 flow. Second operand 63 states and 566 transitions. [2023-11-29 02:44:44,693 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 325 places, 996 transitions, 22456 flow [2023-11-29 02:44:45,313 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 312 places, 996 transitions, 22132 flow, removed 116 selfloop flow, removed 13 redundant places. [2023-11-29 02:44:45,333 INFO L231 Difference]: Finished difference. Result has 335 places, 781 transitions, 20292 flow [2023-11-29 02:44:45,334 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} [2023-11-29 02:44:45,334 INFO L281 CegarLoopForPetriNet]: 24 programPoint places, 311 predicate places. [2023-11-29 02:44:45,334 INFO L495 AbstractCegarLoop]: Abstraction has has 335 places, 781 transitions, 20292 flow [2023-11-29 02:44:45,334 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) [2023-11-29 02:44:45,335 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 02:44:45,335 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 02:44:45,339 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dfd6f313-13a5-4a5c-8388-2a25e6fd4e43/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Ended with exit code 0 [2023-11-29 02:44:45,535 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dfd6f313-13a5-4a5c-8388-2a25e6fd4e43/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2023-11-29 02:44:45,535 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-29 02:44:45,535 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 02:44:45,535 INFO L85 PathProgramCache]: Analyzing trace with hash -1593145921, now seen corresponding path program 12 times [2023-11-29 02:44:45,536 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 02:44:45,536 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [24706642] [2023-11-29 02:44:45,536 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 02:44:45,536 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 02:44:45,548 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 02:44:45,805 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 02:44:45,805 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 02:44:45,805 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [24706642] [2023-11-29 02:44:45,805 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [24706642] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 02:44:45,805 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [714591550] [2023-11-29 02:44:45,805 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-11-29 02:44:45,805 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 02:44:45,806 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dfd6f313-13a5-4a5c-8388-2a25e6fd4e43/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 02:44:45,806 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dfd6f313-13a5-4a5c-8388-2a25e6fd4e43/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 02:44:45,807 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dfd6f313-13a5-4a5c-8388-2a25e6fd4e43/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2023-11-29 02:44:45,877 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2023-11-29 02:44:45,877 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-29 02:44:45,878 INFO L262 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 18 conjunts are in the unsatisfiable core [2023-11-29 02:44:45,879 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 02:44:46,147 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 02:44:46,147 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 02:44:46,730 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 02:44:46,730 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [714591550] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 02:44:46,730 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 02:44:46,730 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12, 12] total 33 [2023-11-29 02:44:46,730 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [471986216] [2023-11-29 02:44:46,730 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 02:44:46,731 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2023-11-29 02:44:46,731 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 02:44:46,731 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2023-11-29 02:44:46,732 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=161, Invalid=961, Unknown=0, NotChecked=0, Total=1122 [2023-11-29 02:44:46,743 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 22 [2023-11-29 02:44:46,744 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) [2023-11-29 02:44:46,744 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 02:44:46,744 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 22 [2023-11-29 02:44:46,744 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 02:44:52,188 INFO L124 PetriNetUnfolderBase]: 2233/4036 cut-off events. [2023-11-29 02:44:52,189 INFO L125 PetriNetUnfolderBase]: For 106801/106801 co-relation queries the response was YES. [2023-11-29 02:44:52,212 INFO L83 FinitePrefix]: Finished finitePrefix Result has 45071 conditions, 4036 events. 2233/4036 cut-off events. For 106801/106801 co-relation queries the response was YES. Maximal size of possible extension queue 175. Compared 24841 event pairs, 49 based on Foata normal form. 5/4041 useless extension candidates. Maximal degree in co-relation 44970. Up to 1112 conditions per place. [2023-11-29 02:44:52,234 INFO L140 encePairwiseOnDemand]: 10/22 looper letters, 374 selfloop transitions, 715 changer transitions 33/1123 dead transitions. [2023-11-29 02:44:52,234 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 409 places, 1123 transitions, 28077 flow [2023-11-29 02:44:52,235 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 79 states. [2023-11-29 02:44:52,235 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 79 states. [2023-11-29 02:44:52,237 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79 states to 79 states and 678 transitions. [2023-11-29 02:44:52,237 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.39010356731875717 [2023-11-29 02:44:52,237 INFO L72 ComplementDD]: Start complementDD. Operand 79 states and 678 transitions. [2023-11-29 02:44:52,238 INFO L73 IsDeterministic]: Start isDeterministic. Operand 79 states and 678 transitions. [2023-11-29 02:44:52,238 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 02:44:52,238 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 79 states and 678 transitions. [2023-11-29 02:44:52,240 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 80 states, 79 states have (on average 8.582278481012658) internal successors, (678), 79 states have internal predecessors, (678), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 02:44:52,242 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 80 states, 80 states have (on average 22.0) internal successors, (1760), 80 states have internal predecessors, (1760), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 02:44:52,243 INFO L81 ComplementDD]: Finished complementDD. Result has 80 states, 80 states have (on average 22.0) internal successors, (1760), 80 states have internal predecessors, (1760), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 02:44:52,243 INFO L175 Difference]: Start difference. First operand has 335 places, 781 transitions, 20292 flow. Second operand 79 states and 678 transitions. [2023-11-29 02:44:52,243 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 409 places, 1123 transitions, 28077 flow [2023-11-29 02:44:53,327 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 396 places, 1123 transitions, 27277 flow, removed 111 selfloop flow, removed 13 redundant places. [2023-11-29 02:44:53,352 INFO L231 Difference]: Finished difference. Result has 417 places, 915 transitions, 25485 flow [2023-11-29 02:44:53,353 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=22, PETRI_DIFFERENCE_MINUEND_FLOW=19697, PETRI_DIFFERENCE_MINUEND_PLACES=318, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=781, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=588, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=180, PETRI_DIFFERENCE_SUBTRAHEND_STATES=79, PETRI_FLOW=25485, PETRI_PLACES=417, PETRI_TRANSITIONS=915} [2023-11-29 02:44:53,354 INFO L281 CegarLoopForPetriNet]: 24 programPoint places, 393 predicate places. [2023-11-29 02:44:53,354 INFO L495 AbstractCegarLoop]: Abstraction has has 417 places, 915 transitions, 25485 flow [2023-11-29 02:44:53,354 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) [2023-11-29 02:44:53,354 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 02:44:53,354 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 02:44:53,359 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dfd6f313-13a5-4a5c-8388-2a25e6fd4e43/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Ended with exit code 0 [2023-11-29 02:44:53,555 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dfd6f313-13a5-4a5c-8388-2a25e6fd4e43/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2023-11-29 02:44:53,555 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-29 02:44:53,555 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 02:44:53,555 INFO L85 PathProgramCache]: Analyzing trace with hash -1581178181, now seen corresponding path program 13 times [2023-11-29 02:44:53,555 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 02:44:53,555 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1776346269] [2023-11-29 02:44:53,556 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 02:44:53,556 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 02:44:53,566 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 02:44:53,829 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 02:44:53,829 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 02:44:53,829 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1776346269] [2023-11-29 02:44:53,829 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1776346269] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 02:44:53,829 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1568191696] [2023-11-29 02:44:53,829 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-11-29 02:44:53,829 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 02:44:53,830 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dfd6f313-13a5-4a5c-8388-2a25e6fd4e43/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 02:44:53,831 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dfd6f313-13a5-4a5c-8388-2a25e6fd4e43/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 02:44:53,840 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dfd6f313-13a5-4a5c-8388-2a25e6fd4e43/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2023-11-29 02:44:53,915 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 02:44:53,916 INFO L262 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 18 conjunts are in the unsatisfiable core [2023-11-29 02:44:53,918 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 02:44:54,244 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 02:44:54,244 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 02:44:54,870 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 02:44:54,870 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1568191696] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 02:44:54,871 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 02:44:54,871 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12, 12] total 33 [2023-11-29 02:44:54,871 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [712136029] [2023-11-29 02:44:54,871 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 02:44:54,871 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2023-11-29 02:44:54,871 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 02:44:54,872 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2023-11-29 02:44:54,872 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=168, Invalid=954, Unknown=0, NotChecked=0, Total=1122 [2023-11-29 02:44:54,885 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 22 [2023-11-29 02:44:54,886 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 417 places, 915 transitions, 25485 flow. Second operand has 34 states, 34 states have (on average 4.735294117647059) internal successors, (161), 34 states have internal predecessors, (161), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 02:44:54,886 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 02:44:54,886 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 22 [2023-11-29 02:44:54,886 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 02:45:02,359 INFO L124 PetriNetUnfolderBase]: 2529/4594 cut-off events. [2023-11-29 02:45:02,360 INFO L125 PetriNetUnfolderBase]: For 145986/145986 co-relation queries the response was YES. [2023-11-29 02:45:02,392 INFO L83 FinitePrefix]: Finished finitePrefix Result has 54219 conditions, 4594 events. 2529/4594 cut-off events. For 145986/145986 co-relation queries the response was YES. Maximal size of possible extension queue 225. Compared 29395 event pairs, 55 based on Foata normal form. 6/4600 useless extension candidates. Maximal degree in co-relation 53858. Up to 1258 conditions per place. [2023-11-29 02:45:02,418 INFO L140 encePairwiseOnDemand]: 10/22 looper letters, 416 selfloop transitions, 863 changer transitions 34/1314 dead transitions. [2023-11-29 02:45:02,418 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 525 places, 1314 transitions, 34887 flow [2023-11-29 02:45:02,419 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 113 states. [2023-11-29 02:45:02,419 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 113 states. [2023-11-29 02:45:02,420 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 113 states to 113 states and 915 transitions. [2023-11-29 02:45:02,421 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3680611423974256 [2023-11-29 02:45:02,422 INFO L72 ComplementDD]: Start complementDD. Operand 113 states and 915 transitions. [2023-11-29 02:45:02,422 INFO L73 IsDeterministic]: Start isDeterministic. Operand 113 states and 915 transitions. [2023-11-29 02:45:02,423 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 02:45:02,423 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 113 states and 915 transitions. [2023-11-29 02:45:02,426 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 114 states, 113 states have (on average 8.097345132743364) internal successors, (915), 113 states have internal predecessors, (915), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 02:45:02,430 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 114 states, 114 states have (on average 22.0) internal successors, (2508), 114 states have internal predecessors, (2508), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 02:45:02,431 INFO L81 ComplementDD]: Finished complementDD. Result has 114 states, 114 states have (on average 22.0) internal successors, (2508), 114 states have internal predecessors, (2508), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 02:45:02,431 INFO L175 Difference]: Start difference. First operand has 417 places, 915 transitions, 25485 flow. Second operand 113 states and 915 transitions. [2023-11-29 02:45:02,431 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 525 places, 1314 transitions, 34887 flow [2023-11-29 02:45:04,524 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 497 places, 1314 transitions, 34110 flow, removed 161 selfloop flow, removed 28 redundant places. [2023-11-29 02:45:04,564 INFO L231 Difference]: Finished difference. Result has 518 places, 1061 transitions, 31475 flow [2023-11-29 02:45:04,565 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=22, PETRI_DIFFERENCE_MINUEND_FLOW=24835, PETRI_DIFFERENCE_MINUEND_PLACES=385, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=914, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=736, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=168, PETRI_DIFFERENCE_SUBTRAHEND_STATES=113, PETRI_FLOW=31475, PETRI_PLACES=518, PETRI_TRANSITIONS=1061} [2023-11-29 02:45:04,566 INFO L281 CegarLoopForPetriNet]: 24 programPoint places, 494 predicate places. [2023-11-29 02:45:04,566 INFO L495 AbstractCegarLoop]: Abstraction has has 518 places, 1061 transitions, 31475 flow [2023-11-29 02:45:04,566 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 34 states have (on average 4.735294117647059) internal successors, (161), 34 states have internal predecessors, (161), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 02:45:04,566 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 02:45:04,566 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 02:45:04,572 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dfd6f313-13a5-4a5c-8388-2a25e6fd4e43/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Ended with exit code 0 [2023-11-29 02:45:04,767 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dfd6f313-13a5-4a5c-8388-2a25e6fd4e43/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2023-11-29 02:45:04,767 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-29 02:45:04,767 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 02:45:04,768 INFO L85 PathProgramCache]: Analyzing trace with hash 1112756615, now seen corresponding path program 14 times [2023-11-29 02:45:04,768 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 02:45:04,768 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2028924723] [2023-11-29 02:45:04,768 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 02:45:04,768 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 02:45:04,781 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 02:45:05,022 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 02:45:05,022 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 02:45:05,022 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2028924723] [2023-11-29 02:45:05,022 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2028924723] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 02:45:05,022 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2060854711] [2023-11-29 02:45:05,022 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-29 02:45:05,022 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 02:45:05,023 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dfd6f313-13a5-4a5c-8388-2a25e6fd4e43/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 02:45:05,023 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dfd6f313-13a5-4a5c-8388-2a25e6fd4e43/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 02:45:05,024 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dfd6f313-13a5-4a5c-8388-2a25e6fd4e43/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2023-11-29 02:45:05,086 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-11-29 02:45:05,086 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-29 02:45:05,087 INFO L262 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 18 conjunts are in the unsatisfiable core [2023-11-29 02:45:05,088 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 02:45:05,389 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 02:45:05,389 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 02:45:05,994 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 02:45:05,995 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2060854711] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 02:45:05,995 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 02:45:05,995 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12, 12] total 33 [2023-11-29 02:45:05,995 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [948094464] [2023-11-29 02:45:05,995 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 02:45:05,995 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2023-11-29 02:45:05,996 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 02:45:05,996 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2023-11-29 02:45:05,996 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=164, Invalid=958, Unknown=0, NotChecked=0, Total=1122 [2023-11-29 02:45:06,003 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 22 [2023-11-29 02:45:06,003 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 518 places, 1061 transitions, 31475 flow. Second operand has 34 states, 34 states have (on average 4.735294117647059) internal successors, (161), 34 states have internal predecessors, (161), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 02:45:06,003 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 02:45:06,003 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 22 [2023-11-29 02:45:06,003 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 02:45:12,134 INFO L124 PetriNetUnfolderBase]: 3050/5518 cut-off events. [2023-11-29 02:45:12,134 INFO L125 PetriNetUnfolderBase]: For 223315/223315 co-relation queries the response was YES. [2023-11-29 02:45:12,183 INFO L83 FinitePrefix]: Finished finitePrefix Result has 70304 conditions, 5518 events. 3050/5518 cut-off events. For 223315/223315 co-relation queries the response was YES. Maximal size of possible extension queue 314. Compared 36715 event pairs, 99 based on Foata normal form. 4/5522 useless extension candidates. Maximal degree in co-relation 69905. Up to 1807 conditions per place. [2023-11-29 02:45:12,227 INFO L140 encePairwiseOnDemand]: 10/22 looper letters, 483 selfloop transitions, 1019 changer transitions 31/1534 dead transitions. [2023-11-29 02:45:12,227 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 599 places, 1534 transitions, 45584 flow [2023-11-29 02:45:12,227 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 87 states. [2023-11-29 02:45:12,227 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 87 states. [2023-11-29 02:45:12,229 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 87 states to 87 states and 737 transitions. [2023-11-29 02:45:12,229 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3850574712643678 [2023-11-29 02:45:12,229 INFO L72 ComplementDD]: Start complementDD. Operand 87 states and 737 transitions. [2023-11-29 02:45:12,229 INFO L73 IsDeterministic]: Start isDeterministic. Operand 87 states and 737 transitions. [2023-11-29 02:45:12,230 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 02:45:12,230 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 87 states and 737 transitions. [2023-11-29 02:45:12,232 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 88 states, 87 states have (on average 8.471264367816092) internal successors, (737), 87 states have internal predecessors, (737), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 02:45:12,235 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 88 states, 88 states have (on average 22.0) internal successors, (1936), 88 states have internal predecessors, (1936), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 02:45:12,235 INFO L81 ComplementDD]: Finished complementDD. Result has 88 states, 88 states have (on average 22.0) internal successors, (1936), 88 states have internal predecessors, (1936), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 02:45:12,235 INFO L175 Difference]: Start difference. First operand has 518 places, 1061 transitions, 31475 flow. Second operand 87 states and 737 transitions. [2023-11-29 02:45:12,235 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 599 places, 1534 transitions, 45584 flow [2023-11-29 02:45:15,206 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 541 places, 1534 transitions, 43578 flow, removed 570 selfloop flow, removed 58 redundant places. [2023-11-29 02:45:15,245 INFO L231 Difference]: Finished difference. Result has 572 places, 1324 transitions, 41823 flow [2023-11-29 02:45:15,246 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=22, PETRI_DIFFERENCE_MINUEND_FLOW=30123, PETRI_DIFFERENCE_MINUEND_PLACES=455, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1060, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=765, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=228, PETRI_DIFFERENCE_SUBTRAHEND_STATES=87, PETRI_FLOW=41823, PETRI_PLACES=572, PETRI_TRANSITIONS=1324} [2023-11-29 02:45:15,247 INFO L281 CegarLoopForPetriNet]: 24 programPoint places, 548 predicate places. [2023-11-29 02:45:15,247 INFO L495 AbstractCegarLoop]: Abstraction has has 572 places, 1324 transitions, 41823 flow [2023-11-29 02:45:15,247 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 34 states have (on average 4.735294117647059) internal successors, (161), 34 states have internal predecessors, (161), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 02:45:15,247 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 02:45:15,247 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 02:45:15,252 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dfd6f313-13a5-4a5c-8388-2a25e6fd4e43/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Ended with exit code 0 [2023-11-29 02:45:15,448 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dfd6f313-13a5-4a5c-8388-2a25e6fd4e43/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2023-11-29 02:45:15,448 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-29 02:45:15,448 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 02:45:15,448 INFO L85 PathProgramCache]: Analyzing trace with hash -195041315, now seen corresponding path program 15 times [2023-11-29 02:45:15,448 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 02:45:15,448 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2104692465] [2023-11-29 02:45:15,448 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 02:45:15,449 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 02:45:15,458 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 02:45:15,709 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 02:45:15,709 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 02:45:15,709 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2104692465] [2023-11-29 02:45:15,709 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2104692465] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 02:45:15,709 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [445180923] [2023-11-29 02:45:15,709 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-11-29 02:45:15,709 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 02:45:15,710 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dfd6f313-13a5-4a5c-8388-2a25e6fd4e43/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 02:45:15,710 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dfd6f313-13a5-4a5c-8388-2a25e6fd4e43/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 02:45:15,716 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dfd6f313-13a5-4a5c-8388-2a25e6fd4e43/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2023-11-29 02:45:15,777 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2023-11-29 02:45:15,777 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-29 02:45:15,778 INFO L262 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 18 conjunts are in the unsatisfiable core [2023-11-29 02:45:15,779 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 02:45:16,047 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 02:45:16,047 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 02:45:16,495 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 02:45:16,495 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [445180923] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 02:45:16,495 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 02:45:16,495 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12, 12] total 33 [2023-11-29 02:45:16,495 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1604345798] [2023-11-29 02:45:16,495 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 02:45:16,496 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2023-11-29 02:45:16,496 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 02:45:16,496 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2023-11-29 02:45:16,497 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=194, Invalid=928, Unknown=0, NotChecked=0, Total=1122 [2023-11-29 02:45:16,511 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 22 [2023-11-29 02:45:16,512 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 572 places, 1324 transitions, 41823 flow. Second operand has 34 states, 34 states have (on average 4.735294117647059) internal successors, (161), 34 states have internal predecessors, (161), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 02:45:16,512 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 02:45:16,512 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 22 [2023-11-29 02:45:16,512 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 02:45:22,248 INFO L124 PetriNetUnfolderBase]: 3380/6109 cut-off events. [2023-11-29 02:45:22,248 INFO L125 PetriNetUnfolderBase]: For 288316/288316 co-relation queries the response was YES. [2023-11-29 02:45:22,298 INFO L83 FinitePrefix]: Finished finitePrefix Result has 80977 conditions, 6109 events. 3380/6109 cut-off events. For 288316/288316 co-relation queries the response was YES. Maximal size of possible extension queue 351. Compared 41625 event pairs, 141 based on Foata normal form. 6/6115 useless extension candidates. Maximal degree in co-relation 80535. Up to 3054 conditions per place. [2023-11-29 02:45:22,335 INFO L140 encePairwiseOnDemand]: 11/22 looper letters, 586 selfloop transitions, 1018 changer transitions 20/1625 dead transitions. [2023-11-29 02:45:22,335 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 630 places, 1625 transitions, 51231 flow [2023-11-29 02:45:22,335 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 63 states. [2023-11-29 02:45:22,335 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 63 states. [2023-11-29 02:45:22,336 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 500 transitions. [2023-11-29 02:45:22,336 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.36075036075036077 [2023-11-29 02:45:22,336 INFO L72 ComplementDD]: Start complementDD. Operand 63 states and 500 transitions. [2023-11-29 02:45:22,337 INFO L73 IsDeterministic]: Start isDeterministic. Operand 63 states and 500 transitions. [2023-11-29 02:45:22,337 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 02:45:22,337 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 63 states and 500 transitions. [2023-11-29 02:45:22,338 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 64 states, 63 states have (on average 7.936507936507937) internal successors, (500), 63 states have internal predecessors, (500), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 02:45:22,340 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) [2023-11-29 02:45:22,340 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) [2023-11-29 02:45:22,340 INFO L175 Difference]: Start difference. First operand has 572 places, 1324 transitions, 41823 flow. Second operand 63 states and 500 transitions. [2023-11-29 02:45:22,340 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 630 places, 1625 transitions, 51231 flow [2023-11-29 02:45:27,064 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 611 places, 1625 transitions, 50371 flow, removed 260 selfloop flow, removed 19 redundant places. [2023-11-29 02:45:27,124 INFO L231 Difference]: Finished difference. Result has 633 places, 1488 transitions, 49719 flow [2023-11-29 02:45:27,125 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=22, PETRI_DIFFERENCE_MINUEND_FLOW=41023, PETRI_DIFFERENCE_MINUEND_PLACES=549, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1324, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=871, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=394, PETRI_DIFFERENCE_SUBTRAHEND_STATES=63, PETRI_FLOW=49719, PETRI_PLACES=633, PETRI_TRANSITIONS=1488} [2023-11-29 02:45:27,125 INFO L281 CegarLoopForPetriNet]: 24 programPoint places, 609 predicate places. [2023-11-29 02:45:27,126 INFO L495 AbstractCegarLoop]: Abstraction has has 633 places, 1488 transitions, 49719 flow [2023-11-29 02:45:27,126 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 34 states have (on average 4.735294117647059) internal successors, (161), 34 states have internal predecessors, (161), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 02:45:27,126 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 02:45:27,126 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 02:45:27,131 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dfd6f313-13a5-4a5c-8388-2a25e6fd4e43/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Ended with exit code 0 [2023-11-29 02:45:27,326 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dfd6f313-13a5-4a5c-8388-2a25e6fd4e43/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2023-11-29 02:45:27,327 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-29 02:45:27,327 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 02:45:27,327 INFO L85 PathProgramCache]: Analyzing trace with hash -1511198619, now seen corresponding path program 16 times [2023-11-29 02:45:27,327 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 02:45:27,328 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [137403660] [2023-11-29 02:45:27,328 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 02:45:27,328 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 02:45:27,342 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 02:45:27,637 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 02:45:27,638 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 02:45:27,638 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [137403660] [2023-11-29 02:45:27,638 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [137403660] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 02:45:27,638 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1536795355] [2023-11-29 02:45:27,638 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-11-29 02:45:27,638 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 02:45:27,638 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dfd6f313-13a5-4a5c-8388-2a25e6fd4e43/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 02:45:27,639 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dfd6f313-13a5-4a5c-8388-2a25e6fd4e43/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 02:45:27,642 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dfd6f313-13a5-4a5c-8388-2a25e6fd4e43/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2023-11-29 02:45:27,723 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-11-29 02:45:27,724 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-29 02:45:27,725 INFO L262 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 18 conjunts are in the unsatisfiable core [2023-11-29 02:45:27,727 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 02:45:28,018 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 02:45:28,018 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 02:45:28,505 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 02:45:28,505 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1536795355] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 02:45:28,505 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 02:45:28,505 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12, 12] total 33 [2023-11-29 02:45:28,505 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [904162445] [2023-11-29 02:45:28,505 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 02:45:28,506 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2023-11-29 02:45:28,506 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 02:45:28,506 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2023-11-29 02:45:28,507 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=186, Invalid=936, Unknown=0, NotChecked=0, Total=1122 [2023-11-29 02:45:28,519 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 22 [2023-11-29 02:45:28,520 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 633 places, 1488 transitions, 49719 flow. Second operand has 34 states, 34 states have (on average 4.735294117647059) internal successors, (161), 34 states have internal predecessors, (161), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 02:45:28,520 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 02:45:28,520 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 22 [2023-11-29 02:45:28,520 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 02:45:34,034 INFO L124 PetriNetUnfolderBase]: 3388/6123 cut-off events. [2023-11-29 02:45:34,034 INFO L125 PetriNetUnfolderBase]: For 309513/309513 co-relation queries the response was YES. [2023-11-29 02:45:34,103 INFO L83 FinitePrefix]: Finished finitePrefix Result has 85797 conditions, 6123 events. 3388/6123 cut-off events. For 309513/309513 co-relation queries the response was YES. Maximal size of possible extension queue 350. Compared 41729 event pairs, 142 based on Foata normal form. 7/6130 useless extension candidates. Maximal degree in co-relation 85439. Up to 3293 conditions per place. [2023-11-29 02:45:34,144 INFO L140 encePairwiseOnDemand]: 11/22 looper letters, 579 selfloop transitions, 993 changer transitions 21/1594 dead transitions. [2023-11-29 02:45:34,144 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 668 places, 1594 transitions, 54231 flow [2023-11-29 02:45:34,145 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2023-11-29 02:45:34,145 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 39 states. [2023-11-29 02:45:34,145 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 332 transitions. [2023-11-29 02:45:34,145 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.38694638694638694 [2023-11-29 02:45:34,145 INFO L72 ComplementDD]: Start complementDD. Operand 39 states and 332 transitions. [2023-11-29 02:45:34,145 INFO L73 IsDeterministic]: Start isDeterministic. Operand 39 states and 332 transitions. [2023-11-29 02:45:34,146 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 02:45:34,146 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 39 states and 332 transitions. [2023-11-29 02:45:34,146 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 40 states, 39 states have (on average 8.512820512820513) internal successors, (332), 39 states have internal predecessors, (332), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 02:45:34,147 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) [2023-11-29 02:45:34,148 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) [2023-11-29 02:45:34,148 INFO L175 Difference]: Start difference. First operand has 633 places, 1488 transitions, 49719 flow. Second operand 39 states and 332 transitions. [2023-11-29 02:45:34,148 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 668 places, 1594 transitions, 54231 flow [2023-11-29 02:45:39,886 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 650 places, 1594 transitions, 53611 flow, removed 230 selfloop flow, removed 18 redundant places. [2023-11-29 02:45:39,946 INFO L231 Difference]: Finished difference. Result has 657 places, 1496 transitions, 52339 flow [2023-11-29 02:45:39,948 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=22, PETRI_DIFFERENCE_MINUEND_FLOW=49107, PETRI_DIFFERENCE_MINUEND_PLACES=612, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1488, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=983, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=498, PETRI_DIFFERENCE_SUBTRAHEND_STATES=39, PETRI_FLOW=52339, PETRI_PLACES=657, PETRI_TRANSITIONS=1496} [2023-11-29 02:45:39,948 INFO L281 CegarLoopForPetriNet]: 24 programPoint places, 633 predicate places. [2023-11-29 02:45:39,948 INFO L495 AbstractCegarLoop]: Abstraction has has 657 places, 1496 transitions, 52339 flow [2023-11-29 02:45:39,949 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 34 states have (on average 4.735294117647059) internal successors, (161), 34 states have internal predecessors, (161), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 02:45:39,949 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 02:45:39,949 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 02:45:39,954 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dfd6f313-13a5-4a5c-8388-2a25e6fd4e43/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Ended with exit code 0 [2023-11-29 02:45:40,149 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dfd6f313-13a5-4a5c-8388-2a25e6fd4e43/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2023-11-29 02:45:40,149 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-29 02:45:40,150 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 02:45:40,150 INFO L85 PathProgramCache]: Analyzing trace with hash 2057862727, now seen corresponding path program 17 times [2023-11-29 02:45:40,150 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 02:45:40,150 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1664196288] [2023-11-29 02:45:40,150 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 02:45:40,150 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 02:45:40,163 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 02:45:40,447 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 02:45:40,447 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 02:45:40,448 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1664196288] [2023-11-29 02:45:40,448 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1664196288] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 02:45:40,448 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1787986905] [2023-11-29 02:45:40,448 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-11-29 02:45:40,448 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 02:45:40,448 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dfd6f313-13a5-4a5c-8388-2a25e6fd4e43/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 02:45:40,449 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dfd6f313-13a5-4a5c-8388-2a25e6fd4e43/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 02:45:40,451 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dfd6f313-13a5-4a5c-8388-2a25e6fd4e43/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2023-11-29 02:45:40,524 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2023-11-29 02:45:40,525 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-29 02:45:40,526 INFO L262 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 18 conjunts are in the unsatisfiable core [2023-11-29 02:45:40,527 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 02:45:40,810 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 02:45:40,810 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 02:45:41,495 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 02:45:41,496 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1787986905] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 02:45:41,496 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 02:45:41,496 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12, 12] total 33 [2023-11-29 02:45:41,496 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [693390517] [2023-11-29 02:45:41,496 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 02:45:41,497 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2023-11-29 02:45:41,497 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 02:45:41,497 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2023-11-29 02:45:41,498 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=153, Invalid=969, Unknown=0, NotChecked=0, Total=1122 [2023-11-29 02:45:41,511 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 22 [2023-11-29 02:45:41,511 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 657 places, 1496 transitions, 52339 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) [2023-11-29 02:45:41,511 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 02:45:41,512 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 22 [2023-11-29 02:45:41,512 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 02:45:49,892 INFO L124 PetriNetUnfolderBase]: 3812/6875 cut-off events. [2023-11-29 02:45:49,892 INFO L125 PetriNetUnfolderBase]: For 347414/347414 co-relation queries the response was YES. [2023-11-29 02:45:49,956 INFO L83 FinitePrefix]: Finished finitePrefix Result has 100249 conditions, 6875 events. 3812/6875 cut-off events. For 347414/347414 co-relation queries the response was YES. Maximal size of possible extension queue 405. Compared 47919 event pairs, 133 based on Foata normal form. 4/6879 useless extension candidates. Maximal degree in co-relation 99971. Up to 3231 conditions per place. [2023-11-29 02:45:50,004 INFO L140 encePairwiseOnDemand]: 10/22 looper letters, 707 selfloop transitions, 1103 changer transitions 31/1842 dead transitions. [2023-11-29 02:45:50,005 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 724 places, 1842 transitions, 64585 flow [2023-11-29 02:45:50,005 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 70 states. [2023-11-29 02:45:50,005 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 70 states. [2023-11-29 02:45:50,006 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70 states to 70 states and 584 transitions. [2023-11-29 02:45:50,007 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.37922077922077924 [2023-11-29 02:45:50,007 INFO L72 ComplementDD]: Start complementDD. Operand 70 states and 584 transitions. [2023-11-29 02:45:50,007 INFO L73 IsDeterministic]: Start isDeterministic. Operand 70 states and 584 transitions. [2023-11-29 02:45:50,007 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 02:45:50,007 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 70 states and 584 transitions. [2023-11-29 02:45:50,009 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 71 states, 70 states have (on average 8.342857142857143) internal successors, (584), 70 states have internal predecessors, (584), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 02:45:50,012 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 71 states, 71 states have (on average 22.0) internal successors, (1562), 71 states have internal predecessors, (1562), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 02:45:50,012 INFO L81 ComplementDD]: Finished complementDD. Result has 71 states, 71 states have (on average 22.0) internal successors, (1562), 71 states have internal predecessors, (1562), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 02:45:50,012 INFO L175 Difference]: Start difference. First operand has 657 places, 1496 transitions, 52339 flow. Second operand 70 states and 584 transitions. [2023-11-29 02:45:50,012 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 724 places, 1842 transitions, 64585 flow [2023-11-29 02:45:56,800 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 701 places, 1842 transitions, 64025 flow, removed 33 selfloop flow, removed 23 redundant places. [2023-11-29 02:45:56,855 INFO L231 Difference]: Finished difference. Result has 735 places, 1678 transitions, 63015 flow [2023-11-29 02:45:56,856 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=22, PETRI_DIFFERENCE_MINUEND_FLOW=51824, PETRI_DIFFERENCE_MINUEND_PLACES=632, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1496, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=922, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=485, PETRI_DIFFERENCE_SUBTRAHEND_STATES=70, PETRI_FLOW=63015, PETRI_PLACES=735, PETRI_TRANSITIONS=1678} [2023-11-29 02:45:56,857 INFO L281 CegarLoopForPetriNet]: 24 programPoint places, 711 predicate places. [2023-11-29 02:45:56,857 INFO L495 AbstractCegarLoop]: Abstraction has has 735 places, 1678 transitions, 63015 flow [2023-11-29 02:45:56,857 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) [2023-11-29 02:45:56,857 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 02:45:56,857 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 02:45:56,861 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dfd6f313-13a5-4a5c-8388-2a25e6fd4e43/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Forceful destruction successful, exit code 0 [2023-11-29 02:45:57,057 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dfd6f313-13a5-4a5c-8388-2a25e6fd4e43/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 02:45:57,057 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-29 02:45:57,058 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 02:45:57,058 INFO L85 PathProgramCache]: Analyzing trace with hash -909574171, now seen corresponding path program 18 times [2023-11-29 02:45:57,058 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 02:45:57,058 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1320987635] [2023-11-29 02:45:57,058 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 02:45:57,058 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 02:45:57,067 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 02:45:57,306 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 02:45:57,306 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 02:45:57,306 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1320987635] [2023-11-29 02:45:57,307 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1320987635] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 02:45:57,307 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [844766109] [2023-11-29 02:45:57,307 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-11-29 02:45:57,307 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 02:45:57,307 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dfd6f313-13a5-4a5c-8388-2a25e6fd4e43/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 02:45:57,308 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dfd6f313-13a5-4a5c-8388-2a25e6fd4e43/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 02:45:57,308 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dfd6f313-13a5-4a5c-8388-2a25e6fd4e43/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2023-11-29 02:45:57,378 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2023-11-29 02:45:57,378 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-29 02:45:57,379 INFO L262 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 18 conjunts are in the unsatisfiable core [2023-11-29 02:45:57,380 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 02:45:57,616 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 02:45:57,616 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 02:45:58,153 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 02:45:58,154 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [844766109] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 02:45:58,154 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 02:45:58,154 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12, 12] total 33 [2023-11-29 02:45:58,154 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [844113912] [2023-11-29 02:45:58,154 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 02:45:58,154 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2023-11-29 02:45:58,154 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 02:45:58,155 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2023-11-29 02:45:58,155 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=168, Invalid=954, Unknown=0, NotChecked=0, Total=1122 [2023-11-29 02:45:58,172 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 22 [2023-11-29 02:45:58,173 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 735 places, 1678 transitions, 63015 flow. Second operand has 34 states, 34 states have (on average 4.735294117647059) internal successors, (161), 34 states have internal predecessors, (161), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 02:45:58,173 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 02:45:58,173 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 22 [2023-11-29 02:45:58,173 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 02:46:07,687 INFO L124 PetriNetUnfolderBase]: 4114/7455 cut-off events. [2023-11-29 02:46:07,688 INFO L125 PetriNetUnfolderBase]: For 466266/466266 co-relation queries the response was YES. [2023-11-29 02:46:07,772 INFO L83 FinitePrefix]: Finished finitePrefix Result has 116309 conditions, 7455 events. 4114/7455 cut-off events. For 466266/466266 co-relation queries the response was YES. Maximal size of possible extension queue 466. Compared 53147 event pairs, 141 based on Foata normal form. 6/7461 useless extension candidates. Maximal degree in co-relation 115995. Up to 3149 conditions per place. [2023-11-29 02:46:07,825 INFO L140 encePairwiseOnDemand]: 10/22 looper letters, 691 selfloop transitions, 1314 changer transitions 22/2028 dead transitions. [2023-11-29 02:46:07,825 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 812 places, 2028 transitions, 75883 flow [2023-11-29 02:46:07,826 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 82 states. [2023-11-29 02:46:07,826 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 82 states. [2023-11-29 02:46:07,827 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 82 states to 82 states and 684 transitions. [2023-11-29 02:46:07,827 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.37915742793791574 [2023-11-29 02:46:07,828 INFO L72 ComplementDD]: Start complementDD. Operand 82 states and 684 transitions. [2023-11-29 02:46:07,828 INFO L73 IsDeterministic]: Start isDeterministic. Operand 82 states and 684 transitions. [2023-11-29 02:46:07,828 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 02:46:07,828 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 82 states and 684 transitions. [2023-11-29 02:46:07,830 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 83 states, 82 states have (on average 8.341463414634147) internal successors, (684), 82 states have internal predecessors, (684), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 02:46:07,833 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 83 states, 83 states have (on average 22.0) internal successors, (1826), 83 states have internal predecessors, (1826), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 02:46:07,833 INFO L81 ComplementDD]: Finished complementDD. Result has 83 states, 83 states have (on average 22.0) internal successors, (1826), 83 states have internal predecessors, (1826), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 02:46:07,833 INFO L175 Difference]: Start difference. First operand has 735 places, 1678 transitions, 63015 flow. Second operand 82 states and 684 transitions. [2023-11-29 02:46:07,834 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 812 places, 2028 transitions, 75883 flow [2023-11-29 02:46:16,760 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 789 places, 2028 transitions, 75525 flow, removed 70 selfloop flow, removed 23 redundant places. [2023-11-29 02:46:16,826 INFO L231 Difference]: Finished difference. Result has 814 places, 1833 transitions, 73684 flow [2023-11-29 02:46:16,827 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=22, PETRI_DIFFERENCE_MINUEND_FLOW=62743, PETRI_DIFFERENCE_MINUEND_PLACES=708, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1678, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1178, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=470, PETRI_DIFFERENCE_SUBTRAHEND_STATES=82, PETRI_FLOW=73684, PETRI_PLACES=814, PETRI_TRANSITIONS=1833} [2023-11-29 02:46:16,827 INFO L281 CegarLoopForPetriNet]: 24 programPoint places, 790 predicate places. [2023-11-29 02:46:16,827 INFO L495 AbstractCegarLoop]: Abstraction has has 814 places, 1833 transitions, 73684 flow [2023-11-29 02:46:16,828 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 34 states have (on average 4.735294117647059) internal successors, (161), 34 states have internal predecessors, (161), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 02:46:16,828 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 02:46:16,828 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 02:46:16,832 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dfd6f313-13a5-4a5c-8388-2a25e6fd4e43/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Forceful destruction successful, exit code 0 [2023-11-29 02:46:17,028 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,19 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dfd6f313-13a5-4a5c-8388-2a25e6fd4e43/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 02:46:17,029 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-29 02:46:17,029 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 02:46:17,029 INFO L85 PathProgramCache]: Analyzing trace with hash 817023841, now seen corresponding path program 19 times [2023-11-29 02:46:17,029 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 02:46:17,029 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1737434450] [2023-11-29 02:46:17,029 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 02:46:17,029 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 02:46:17,039 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 02:46:17,266 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 02:46:17,266 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 02:46:17,266 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1737434450] [2023-11-29 02:46:17,266 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1737434450] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 02:46:17,266 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [251298770] [2023-11-29 02:46:17,266 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-11-29 02:46:17,266 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 02:46:17,266 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dfd6f313-13a5-4a5c-8388-2a25e6fd4e43/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 02:46:17,267 INFO L229 MonitoredProcess]: Starting monitored process 20 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dfd6f313-13a5-4a5c-8388-2a25e6fd4e43/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 02:46:17,270 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dfd6f313-13a5-4a5c-8388-2a25e6fd4e43/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2023-11-29 02:46:17,335 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 02:46:17,336 INFO L262 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 18 conjunts are in the unsatisfiable core [2023-11-29 02:46:17,337 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 02:46:17,609 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 02:46:17,609 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 02:46:18,098 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 02:46:18,098 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [251298770] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 02:46:18,099 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 02:46:18,099 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12, 12] total 33 [2023-11-29 02:46:18,099 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [605793233] [2023-11-29 02:46:18,099 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 02:46:18,099 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2023-11-29 02:46:18,099 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 02:46:18,100 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2023-11-29 02:46:18,100 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=169, Invalid=953, Unknown=0, NotChecked=0, Total=1122 [2023-11-29 02:46:18,119 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 22 [2023-11-29 02:46:18,119 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 814 places, 1833 transitions, 73684 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) [2023-11-29 02:46:18,119 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 02:46:18,119 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 22 [2023-11-29 02:46:18,120 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 02:46:29,209 INFO L124 PetriNetUnfolderBase]: 4139/7487 cut-off events. [2023-11-29 02:46:29,209 INFO L125 PetriNetUnfolderBase]: For 533174/533174 co-relation queries the response was YES. [2023-11-29 02:46:29,299 INFO L83 FinitePrefix]: Finished finitePrefix Result has 123906 conditions, 7487 events. 4139/7487 cut-off events. For 533174/533174 co-relation queries the response was YES. Maximal size of possible extension queue 466. Compared 53343 event pairs, 143 based on Foata normal form. 5/7492 useless extension candidates. Maximal degree in co-relation 123568. Up to 3126 conditions per place. [2023-11-29 02:46:29,354 INFO L140 encePairwiseOnDemand]: 10/22 looper letters, 712 selfloop transitions, 1300 changer transitions 32/2045 dead transitions. [2023-11-29 02:46:29,354 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 905 places, 2045 transitions, 80803 flow [2023-11-29 02:46:29,354 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 97 states. [2023-11-29 02:46:29,354 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 97 states. [2023-11-29 02:46:29,355 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 97 states to 97 states and 768 transitions. [2023-11-29 02:46:29,356 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3598875351452671 [2023-11-29 02:46:29,356 INFO L72 ComplementDD]: Start complementDD. Operand 97 states and 768 transitions. [2023-11-29 02:46:29,356 INFO L73 IsDeterministic]: Start isDeterministic. Operand 97 states and 768 transitions. [2023-11-29 02:46:29,356 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 02:46:29,356 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 97 states and 768 transitions. [2023-11-29 02:46:29,357 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 98 states, 97 states have (on average 7.917525773195877) internal successors, (768), 97 states have internal predecessors, (768), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 02:46:29,359 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 98 states, 98 states have (on average 22.0) internal successors, (2156), 98 states have internal predecessors, (2156), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 02:46:29,360 INFO L81 ComplementDD]: Finished complementDD. Result has 98 states, 98 states have (on average 22.0) internal successors, (2156), 98 states have internal predecessors, (2156), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 02:46:29,360 INFO L175 Difference]: Start difference. First operand has 814 places, 1833 transitions, 73684 flow. Second operand 97 states and 768 transitions. [2023-11-29 02:46:29,360 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 905 places, 2045 transitions, 80803 flow [2023-11-29 02:46:40,480 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 866 places, 2045 transitions, 79253 flow, removed 542 selfloop flow, removed 39 redundant places. [2023-11-29 02:46:40,549 INFO L231 Difference]: Finished difference. Result has 875 places, 1856 transitions, 76844 flow [2023-11-29 02:46:40,550 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=22, PETRI_DIFFERENCE_MINUEND_FLOW=72231, PETRI_DIFFERENCE_MINUEND_PLACES=770, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1830, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1277, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=544, PETRI_DIFFERENCE_SUBTRAHEND_STATES=97, PETRI_FLOW=76844, PETRI_PLACES=875, PETRI_TRANSITIONS=1856} [2023-11-29 02:46:40,550 INFO L281 CegarLoopForPetriNet]: 24 programPoint places, 851 predicate places. [2023-11-29 02:46:40,551 INFO L495 AbstractCegarLoop]: Abstraction has has 875 places, 1856 transitions, 76844 flow [2023-11-29 02:46:40,551 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) [2023-11-29 02:46:40,551 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 02:46:40,551 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 02:46:40,555 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dfd6f313-13a5-4a5c-8388-2a25e6fd4e43/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Ended with exit code 0 [2023-11-29 02:46:40,751 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,20 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dfd6f313-13a5-4a5c-8388-2a25e6fd4e43/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 02:46:40,751 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-29 02:46:40,752 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 02:46:40,752 INFO L85 PathProgramCache]: Analyzing trace with hash 1681172385, now seen corresponding path program 20 times [2023-11-29 02:46:40,752 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 02:46:40,752 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1830706561] [2023-11-29 02:46:40,752 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 02:46:40,752 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 02:46:40,761 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 02:46:41,009 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 02:46:41,010 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 02:46:41,010 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1830706561] [2023-11-29 02:46:41,010 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1830706561] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 02:46:41,010 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1949006644] [2023-11-29 02:46:41,010 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-29 02:46:41,010 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 02:46:41,010 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dfd6f313-13a5-4a5c-8388-2a25e6fd4e43/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 02:46:41,011 INFO L229 MonitoredProcess]: Starting monitored process 21 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dfd6f313-13a5-4a5c-8388-2a25e6fd4e43/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 02:46:41,012 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dfd6f313-13a5-4a5c-8388-2a25e6fd4e43/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2023-11-29 02:46:41,086 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-11-29 02:46:41,086 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-29 02:46:41,088 INFO L262 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 18 conjunts are in the unsatisfiable core [2023-11-29 02:46:41,089 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 02:46:41,348 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 02:46:41,348 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 02:46:41,824 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 02:46:41,824 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1949006644] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 02:46:41,824 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 02:46:41,824 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12, 12] total 33 [2023-11-29 02:46:41,824 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1225923206] [2023-11-29 02:46:41,825 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 02:46:41,825 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2023-11-29 02:46:41,825 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 02:46:41,825 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2023-11-29 02:46:41,826 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=201, Invalid=921, Unknown=0, NotChecked=0, Total=1122 [2023-11-29 02:46:41,841 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 22 [2023-11-29 02:46:41,841 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 875 places, 1856 transitions, 76844 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) [2023-11-29 02:46:41,841 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 02:46:41,841 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 22 [2023-11-29 02:46:41,841 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 02:46:53,078 INFO L124 PetriNetUnfolderBase]: 4449/8072 cut-off events. [2023-11-29 02:46:53,078 INFO L125 PetriNetUnfolderBase]: For 596626/596626 co-relation queries the response was YES. [2023-11-29 02:46:53,197 INFO L83 FinitePrefix]: Finished finitePrefix Result has 135720 conditions, 8072 events. 4449/8072 cut-off events. For 596626/596626 co-relation queries the response was YES. Maximal size of possible extension queue 506. Compared 58412 event pairs, 157 based on Foata normal form. 12/8084 useless extension candidates. Maximal degree in co-relation 135380. Up to 3552 conditions per place. [2023-11-29 02:46:53,261 INFO L140 encePairwiseOnDemand]: 10/22 looper letters, 761 selfloop transitions, 1374 changer transitions 33/2169 dead transitions. [2023-11-29 02:46:53,262 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 948 places, 2169 transitions, 88456 flow [2023-11-29 02:46:53,262 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 87 states. [2023-11-29 02:46:53,262 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 87 states. [2023-11-29 02:46:53,263 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 87 states to 87 states and 693 transitions. [2023-11-29 02:46:53,264 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3620689655172414 [2023-11-29 02:46:53,264 INFO L72 ComplementDD]: Start complementDD. Operand 87 states and 693 transitions. [2023-11-29 02:46:53,264 INFO L73 IsDeterministic]: Start isDeterministic. Operand 87 states and 693 transitions. [2023-11-29 02:46:53,264 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 02:46:53,264 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 87 states and 693 transitions. [2023-11-29 02:46:53,266 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 88 states, 87 states have (on average 7.9655172413793105) internal successors, (693), 87 states have internal predecessors, (693), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 02:46:53,269 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 88 states, 88 states have (on average 22.0) internal successors, (1936), 88 states have internal predecessors, (1936), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 02:46:53,270 INFO L81 ComplementDD]: Finished complementDD. Result has 88 states, 88 states have (on average 22.0) internal successors, (1936), 88 states have internal predecessors, (1936), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 02:46:53,270 INFO L175 Difference]: Start difference. First operand has 875 places, 1856 transitions, 76844 flow. Second operand 87 states and 693 transitions. [2023-11-29 02:46:53,270 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 948 places, 2169 transitions, 88456 flow [2023-11-29 02:47:06,399 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 878 places, 2169 transitions, 87329 flow, removed 179 selfloop flow, removed 70 redundant places. [2023-11-29 02:47:06,482 INFO L231 Difference]: Finished difference. Result has 895 places, 1985 transitions, 85648 flow [2023-11-29 02:47:06,483 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=22, PETRI_DIFFERENCE_MINUEND_FLOW=75423, PETRI_DIFFERENCE_MINUEND_PLACES=792, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1845, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1248, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=535, PETRI_DIFFERENCE_SUBTRAHEND_STATES=87, PETRI_FLOW=85648, PETRI_PLACES=895, PETRI_TRANSITIONS=1985} [2023-11-29 02:47:06,484 INFO L281 CegarLoopForPetriNet]: 24 programPoint places, 871 predicate places. [2023-11-29 02:47:06,484 INFO L495 AbstractCegarLoop]: Abstraction has has 895 places, 1985 transitions, 85648 flow [2023-11-29 02:47:06,484 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) [2023-11-29 02:47:06,484 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 02:47:06,484 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 02:47:06,489 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dfd6f313-13a5-4a5c-8388-2a25e6fd4e43/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Ended with exit code 0 [2023-11-29 02:47:06,685 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21,21 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dfd6f313-13a5-4a5c-8388-2a25e6fd4e43/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 02:47:06,685 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-29 02:47:06,685 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 02:47:06,685 INFO L85 PathProgramCache]: Analyzing trace with hash 1534006019, now seen corresponding path program 21 times [2023-11-29 02:47:06,685 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 02:47:06,685 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1634581032] [2023-11-29 02:47:06,685 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 02:47:06,686 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 02:47:06,695 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 02:47:06,934 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 02:47:06,935 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 02:47:06,935 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1634581032] [2023-11-29 02:47:06,935 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1634581032] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 02:47:06,935 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1565679101] [2023-11-29 02:47:06,935 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-11-29 02:47:06,935 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 02:47:06,935 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dfd6f313-13a5-4a5c-8388-2a25e6fd4e43/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 02:47:06,936 INFO L229 MonitoredProcess]: Starting monitored process 22 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dfd6f313-13a5-4a5c-8388-2a25e6fd4e43/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 02:47:06,937 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dfd6f313-13a5-4a5c-8388-2a25e6fd4e43/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2023-11-29 02:47:06,999 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2023-11-29 02:47:06,999 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-29 02:47:07,000 INFO L262 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 18 conjunts are in the unsatisfiable core [2023-11-29 02:47:07,001 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 02:47:07,253 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 02:47:07,253 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 02:47:07,741 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 02:47:07,741 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1565679101] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 02:47:07,741 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 02:47:07,741 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12, 12] total 33 [2023-11-29 02:47:07,741 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1351959204] [2023-11-29 02:47:07,741 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 02:47:07,742 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2023-11-29 02:47:07,742 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 02:47:07,742 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2023-11-29 02:47:07,743 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=198, Invalid=924, Unknown=0, NotChecked=0, Total=1122 [2023-11-29 02:47:07,757 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 22 [2023-11-29 02:47:07,757 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 895 places, 1985 transitions, 85648 flow. Second operand has 34 states, 34 states have (on average 4.735294117647059) internal successors, (161), 34 states have internal predecessors, (161), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 02:47:07,757 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 02:47:07,758 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 22 [2023-11-29 02:47:07,758 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 02:47:19,799 INFO L124 PetriNetUnfolderBase]: 4433/8032 cut-off events. [2023-11-29 02:47:19,799 INFO L125 PetriNetUnfolderBase]: For 648902/648902 co-relation queries the response was YES. [2023-11-29 02:47:19,921 INFO L83 FinitePrefix]: Finished finitePrefix Result has 141371 conditions, 8032 events. 4433/8032 cut-off events. For 648902/648902 co-relation queries the response was YES. Maximal size of possible extension queue 499. Compared 57999 event pairs, 155 based on Foata normal form. 3/8035 useless extension candidates. Maximal degree in co-relation 141013. Up to 3654 conditions per place. [2023-11-29 02:47:19,994 INFO L140 encePairwiseOnDemand]: 11/22 looper letters, 670 selfloop transitions, 1462 changer transitions 16/2149 dead transitions. [2023-11-29 02:47:19,994 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 963 places, 2149 transitions, 92692 flow [2023-11-29 02:47:19,995 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 74 states. [2023-11-29 02:47:19,995 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 74 states. [2023-11-29 02:47:19,996 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74 states to 74 states and 598 transitions. [2023-11-29 02:47:19,997 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.36732186732186733 [2023-11-29 02:47:19,997 INFO L72 ComplementDD]: Start complementDD. Operand 74 states and 598 transitions. [2023-11-29 02:47:19,997 INFO L73 IsDeterministic]: Start isDeterministic. Operand 74 states and 598 transitions. [2023-11-29 02:47:19,997 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 02:47:19,997 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 74 states and 598 transitions. [2023-11-29 02:47:19,999 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 75 states, 74 states have (on average 8.08108108108108) internal successors, (598), 74 states have internal predecessors, (598), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 02:47:20,002 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 75 states, 75 states have (on average 22.0) internal successors, (1650), 75 states have internal predecessors, (1650), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 02:47:20,002 INFO L81 ComplementDD]: Finished complementDD. Result has 75 states, 75 states have (on average 22.0) internal successors, (1650), 75 states have internal predecessors, (1650), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 02:47:20,003 INFO L175 Difference]: Start difference. First operand has 895 places, 1985 transitions, 85648 flow. Second operand 74 states and 598 transitions. [2023-11-29 02:47:20,003 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 963 places, 2149 transitions, 92692 flow [2023-11-29 02:47:34,207 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 897 places, 2149 transitions, 91112 flow, removed 338 selfloop flow, removed 66 redundant places. [2023-11-29 02:47:34,284 INFO L231 Difference]: Finished difference. Result has 903 places, 2006 transitions, 88589 flow [2023-11-29 02:47:34,285 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=22, PETRI_DIFFERENCE_MINUEND_FLOW=84187, PETRI_DIFFERENCE_MINUEND_PLACES=824, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1984, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1440, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=537, PETRI_DIFFERENCE_SUBTRAHEND_STATES=74, PETRI_FLOW=88589, PETRI_PLACES=903, PETRI_TRANSITIONS=2006} [2023-11-29 02:47:34,286 INFO L281 CegarLoopForPetriNet]: 24 programPoint places, 879 predicate places. [2023-11-29 02:47:34,286 INFO L495 AbstractCegarLoop]: Abstraction has has 903 places, 2006 transitions, 88589 flow [2023-11-29 02:47:34,286 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 34 states have (on average 4.735294117647059) internal successors, (161), 34 states have internal predecessors, (161), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 02:47:34,286 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 02:47:34,286 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 02:47:34,290 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dfd6f313-13a5-4a5c-8388-2a25e6fd4e43/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Ended with exit code 0 [2023-11-29 02:47:34,486 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22,22 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dfd6f313-13a5-4a5c-8388-2a25e6fd4e43/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 02:47:34,486 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-29 02:47:34,487 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 02:47:34,487 INFO L85 PathProgramCache]: Analyzing trace with hash 1093825773, now seen corresponding path program 22 times [2023-11-29 02:47:34,487 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 02:47:34,487 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1162859647] [2023-11-29 02:47:34,487 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 02:47:34,487 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 02:47:34,496 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 02:47:34,702 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 02:47:34,702 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 02:47:34,703 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1162859647] [2023-11-29 02:47:34,703 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1162859647] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 02:47:34,703 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2101638904] [2023-11-29 02:47:34,703 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-11-29 02:47:34,703 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 02:47:34,703 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dfd6f313-13a5-4a5c-8388-2a25e6fd4e43/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 02:47:34,704 INFO L229 MonitoredProcess]: Starting monitored process 23 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dfd6f313-13a5-4a5c-8388-2a25e6fd4e43/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 02:47:34,706 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dfd6f313-13a5-4a5c-8388-2a25e6fd4e43/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2023-11-29 02:47:34,772 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-11-29 02:47:34,772 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-29 02:47:34,773 INFO L262 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 18 conjunts are in the unsatisfiable core [2023-11-29 02:47:34,774 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 02:47:35,029 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 02:47:35,029 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 02:47:35,498 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 02:47:35,498 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2101638904] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 02:47:35,498 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 02:47:35,498 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12, 12] total 33 [2023-11-29 02:47:35,498 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1177605626] [2023-11-29 02:47:35,499 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 02:47:35,499 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2023-11-29 02:47:35,499 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 02:47:35,499 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2023-11-29 02:47:35,500 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=180, Invalid=942, Unknown=0, NotChecked=0, Total=1122 [2023-11-29 02:47:35,506 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 22 [2023-11-29 02:47:35,506 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 903 places, 2006 transitions, 88589 flow. Second operand has 34 states, 34 states have (on average 4.735294117647059) internal successors, (161), 34 states have internal predecessors, (161), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 02:47:35,506 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 02:47:35,506 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 22 [2023-11-29 02:47:35,506 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 02:47:46,100 INFO L124 PetriNetUnfolderBase]: 4589/8316 cut-off events. [2023-11-29 02:47:46,100 INFO L125 PetriNetUnfolderBase]: For 680284/680284 co-relation queries the response was YES. [2023-11-29 02:47:46,211 INFO L83 FinitePrefix]: Finished finitePrefix Result has 148610 conditions, 8316 events. 4589/8316 cut-off events. For 680284/680284 co-relation queries the response was YES. Maximal size of possible extension queue 513. Compared 60476 event pairs, 201 based on Foata normal form. 4/8320 useless extension candidates. Maximal degree in co-relation 148244. Up to 4657 conditions per place. [2023-11-29 02:47:46,378 INFO L140 encePairwiseOnDemand]: 11/22 looper letters, 829 selfloop transitions, 1348 changer transitions 16/2194 dead transitions. [2023-11-29 02:47:46,379 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 944 places, 2194 transitions, 98307 flow [2023-11-29 02:47:46,379 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2023-11-29 02:47:46,379 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 44 states. [2023-11-29 02:47:46,380 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 364 transitions. [2023-11-29 02:47:46,380 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3760330578512397 [2023-11-29 02:47:46,380 INFO L72 ComplementDD]: Start complementDD. Operand 44 states and 364 transitions. [2023-11-29 02:47:46,380 INFO L73 IsDeterministic]: Start isDeterministic. Operand 44 states and 364 transitions. [2023-11-29 02:47:46,380 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 02:47:46,381 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 44 states and 364 transitions. [2023-11-29 02:47:46,381 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 45 states, 44 states have (on average 8.272727272727273) internal successors, (364), 44 states have internal predecessors, (364), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 02:47:46,383 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 45 states, 45 states have (on average 22.0) internal successors, (990), 45 states have internal predecessors, (990), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 02:47:46,383 INFO L81 ComplementDD]: Finished complementDD. Result has 45 states, 45 states have (on average 22.0) internal successors, (990), 45 states have internal predecessors, (990), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 02:47:46,383 INFO L175 Difference]: Start difference. First operand has 903 places, 2006 transitions, 88589 flow. Second operand 44 states and 364 transitions. [2023-11-29 02:47:46,383 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 944 places, 2194 transitions, 98307 flow [2023-11-29 02:48:01,967 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 893 places, 2194 transitions, 97415 flow, removed 164 selfloop flow, removed 51 redundant places. [2023-11-29 02:48:02,073 INFO L231 Difference]: Finished difference. Result has 907 places, 2088 transitions, 96571 flow [2023-11-29 02:48:02,075 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=22, PETRI_DIFFERENCE_MINUEND_FLOW=87750, PETRI_DIFFERENCE_MINUEND_PLACES=850, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=2006, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1272, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=707, PETRI_DIFFERENCE_SUBTRAHEND_STATES=44, PETRI_FLOW=96571, PETRI_PLACES=907, PETRI_TRANSITIONS=2088} [2023-11-29 02:48:02,075 INFO L281 CegarLoopForPetriNet]: 24 programPoint places, 883 predicate places. [2023-11-29 02:48:02,075 INFO L495 AbstractCegarLoop]: Abstraction has has 907 places, 2088 transitions, 96571 flow [2023-11-29 02:48:02,075 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 34 states have (on average 4.735294117647059) internal successors, (161), 34 states have internal predecessors, (161), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 02:48:02,075 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 02:48:02,076 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 02:48:02,080 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dfd6f313-13a5-4a5c-8388-2a25e6fd4e43/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Ended with exit code 0 [2023-11-29 02:48:02,276 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23,23 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dfd6f313-13a5-4a5c-8388-2a25e6fd4e43/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 02:48:02,276 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-29 02:48:02,276 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 02:48:02,276 INFO L85 PathProgramCache]: Analyzing trace with hash -1884984219, now seen corresponding path program 23 times [2023-11-29 02:48:02,276 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 02:48:02,276 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2111369850] [2023-11-29 02:48:02,276 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 02:48:02,277 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 02:48:02,284 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 02:48:02,456 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 02:48:02,456 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 02:48:02,456 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2111369850] [2023-11-29 02:48:02,456 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2111369850] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 02:48:02,456 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [904739681] [2023-11-29 02:48:02,457 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-11-29 02:48:02,457 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 02:48:02,457 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dfd6f313-13a5-4a5c-8388-2a25e6fd4e43/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 02:48:02,457 INFO L229 MonitoredProcess]: Starting monitored process 24 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dfd6f313-13a5-4a5c-8388-2a25e6fd4e43/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 02:48:02,458 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dfd6f313-13a5-4a5c-8388-2a25e6fd4e43/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Waiting until timeout for monitored process [2023-11-29 02:48:02,523 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2023-11-29 02:48:02,523 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-29 02:48:02,524 INFO L262 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 18 conjunts are in the unsatisfiable core [2023-11-29 02:48:02,525 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 02:48:02,782 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 02:48:02,782 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 02:48:03,255 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 02:48:03,255 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [904739681] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 02:48:03,255 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 02:48:03,255 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12, 12] total 33 [2023-11-29 02:48:03,256 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [245939380] [2023-11-29 02:48:03,256 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 02:48:03,256 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2023-11-29 02:48:03,256 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 02:48:03,257 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2023-11-29 02:48:03,257 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=188, Invalid=934, Unknown=0, NotChecked=0, Total=1122 [2023-11-29 02:48:03,264 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 22 [2023-11-29 02:48:03,265 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 907 places, 2088 transitions, 96571 flow. Second operand has 34 states, 34 states have (on average 4.735294117647059) internal successors, (161), 34 states have internal predecessors, (161), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 02:48:03,265 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 02:48:03,265 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 22 [2023-11-29 02:48:03,265 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 02:48:15,637 INFO L124 PetriNetUnfolderBase]: 4667/8464 cut-off events. [2023-11-29 02:48:15,637 INFO L125 PetriNetUnfolderBase]: For 754758/754758 co-relation queries the response was YES. [2023-11-29 02:48:15,753 INFO L83 FinitePrefix]: Finished finitePrefix Result has 157092 conditions, 8464 events. 4667/8464 cut-off events. For 754758/754758 co-relation queries the response was YES. Maximal size of possible extension queue 523. Compared 61846 event pairs, 194 based on Foata normal form. 4/8468 useless extension candidates. Maximal degree in co-relation 156571. Up to 4398 conditions per place. [2023-11-29 02:48:15,820 INFO L140 encePairwiseOnDemand]: 11/22 looper letters, 824 selfloop transitions, 1426 changer transitions 20/2271 dead transitions. [2023-11-29 02:48:15,820 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 973 places, 2271 transitions, 104966 flow [2023-11-29 02:48:15,821 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 69 states. [2023-11-29 02:48:15,821 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 69 states. [2023-11-29 02:48:15,821 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69 states to 69 states and 530 transitions. [2023-11-29 02:48:15,821 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.34914361001317523 [2023-11-29 02:48:15,822 INFO L72 ComplementDD]: Start complementDD. Operand 69 states and 530 transitions. [2023-11-29 02:48:15,822 INFO L73 IsDeterministic]: Start isDeterministic. Operand 69 states and 530 transitions. [2023-11-29 02:48:15,822 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 02:48:15,822 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 69 states and 530 transitions. [2023-11-29 02:48:15,823 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 70 states, 69 states have (on average 7.681159420289855) internal successors, (530), 69 states have internal predecessors, (530), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 02:48:15,825 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 70 states, 70 states have (on average 22.0) internal successors, (1540), 70 states have internal predecessors, (1540), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 02:48:15,825 INFO L81 ComplementDD]: Finished complementDD. Result has 70 states, 70 states have (on average 22.0) internal successors, (1540), 70 states have internal predecessors, (1540), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 02:48:15,825 INFO L175 Difference]: Start difference. First operand has 907 places, 2088 transitions, 96571 flow. Second operand 69 states and 530 transitions. [2023-11-29 02:48:15,825 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 973 places, 2271 transitions, 104966 flow [2023-11-29 02:48:32,850 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 955 places, 2271 transitions, 104501 flow, removed 20 selfloop flow, removed 18 redundant places. [2023-11-29 02:48:32,940 INFO L231 Difference]: Finished difference. Result has 966 places, 2133 transitions, 103143 flow [2023-11-29 02:48:32,942 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=22, PETRI_DIFFERENCE_MINUEND_FLOW=96117, PETRI_DIFFERENCE_MINUEND_PLACES=887, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=2088, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1385, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=691, PETRI_DIFFERENCE_SUBTRAHEND_STATES=69, PETRI_FLOW=103143, PETRI_PLACES=966, PETRI_TRANSITIONS=2133} [2023-11-29 02:48:32,943 INFO L281 CegarLoopForPetriNet]: 24 programPoint places, 942 predicate places. [2023-11-29 02:48:32,943 INFO L495 AbstractCegarLoop]: Abstraction has has 966 places, 2133 transitions, 103143 flow [2023-11-29 02:48:32,943 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 34 states have (on average 4.735294117647059) internal successors, (161), 34 states have internal predecessors, (161), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 02:48:32,943 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 02:48:32,943 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 02:48:32,947 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dfd6f313-13a5-4a5c-8388-2a25e6fd4e43/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Ended with exit code 0 [2023-11-29 02:48:33,143 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dfd6f313-13a5-4a5c-8388-2a25e6fd4e43/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable24 [2023-11-29 02:48:33,144 INFO L420 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-29 02:48:33,144 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 02:48:33,144 INFO L85 PathProgramCache]: Analyzing trace with hash 367919823, now seen corresponding path program 24 times [2023-11-29 02:48:33,144 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 02:48:33,144 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2047708863] [2023-11-29 02:48:33,144 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 02:48:33,144 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 02:48:33,199 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 02:48:33,423 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 02:48:33,423 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 02:48:33,424 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2047708863] [2023-11-29 02:48:33,424 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2047708863] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 02:48:33,424 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1020710881] [2023-11-29 02:48:33,424 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-11-29 02:48:33,424 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 02:48:33,424 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dfd6f313-13a5-4a5c-8388-2a25e6fd4e43/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 02:48:33,425 INFO L229 MonitoredProcess]: Starting monitored process 25 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dfd6f313-13a5-4a5c-8388-2a25e6fd4e43/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 02:48:33,427 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dfd6f313-13a5-4a5c-8388-2a25e6fd4e43/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Waiting until timeout for monitored process [2023-11-29 02:48:33,506 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2023-11-29 02:48:33,506 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-29 02:48:33,507 INFO L262 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 18 conjunts are in the unsatisfiable core [2023-11-29 02:48:33,508 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 02:48:33,827 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 02:48:33,828 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 02:48:34,450 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 02:48:34,450 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1020710881] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 02:48:34,450 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 02:48:34,451 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12, 12] total 33 [2023-11-29 02:48:34,451 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1583875406] [2023-11-29 02:48:34,451 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 02:48:34,451 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2023-11-29 02:48:34,451 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 02:48:34,452 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2023-11-29 02:48:34,452 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=152, Invalid=970, Unknown=0, NotChecked=0, Total=1122 [2023-11-29 02:48:34,464 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 22 [2023-11-29 02:48:34,464 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 966 places, 2133 transitions, 103143 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) [2023-11-29 02:48:34,464 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 02:48:34,464 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 22 [2023-11-29 02:48:34,464 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 02:48:49,751 INFO L124 PetriNetUnfolderBase]: 5074/9200 cut-off events. [2023-11-29 02:48:49,751 INFO L125 PetriNetUnfolderBase]: For 930302/930302 co-relation queries the response was YES. [2023-11-29 02:48:49,876 INFO L83 FinitePrefix]: Finished finitePrefix Result has 179527 conditions, 9200 events. 5074/9200 cut-off events. For 930302/930302 co-relation queries the response was YES. Maximal size of possible extension queue 576. Compared 68292 event pairs, 191 based on Foata normal form. 4/9204 useless extension candidates. Maximal degree in co-relation 179049. Up to 4713 conditions per place. [2023-11-29 02:48:49,952 INFO L140 encePairwiseOnDemand]: 10/22 looper letters, 970 selfloop transitions, 1465 changer transitions 31/2467 dead transitions. [2023-11-29 02:48:49,953 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 1029 places, 2467 transitions, 119542 flow [2023-11-29 02:48:49,953 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 67 states. [2023-11-29 02:48:49,953 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 67 states. [2023-11-29 02:48:49,954 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67 states to 67 states and 578 transitions. [2023-11-29 02:48:49,954 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3921302578018996 [2023-11-29 02:48:49,954 INFO L72 ComplementDD]: Start complementDD. Operand 67 states and 578 transitions. [2023-11-29 02:48:49,954 INFO L73 IsDeterministic]: Start isDeterministic. Operand 67 states and 578 transitions. [2023-11-29 02:48:49,954 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 02:48:49,954 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 67 states and 578 transitions. [2023-11-29 02:48:49,955 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 68 states, 67 states have (on average 8.626865671641792) internal successors, (578), 67 states have internal predecessors, (578), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 02:48:49,957 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 68 states, 68 states have (on average 22.0) internal successors, (1496), 68 states have internal predecessors, (1496), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 02:48:49,958 INFO L81 ComplementDD]: Finished complementDD. Result has 68 states, 68 states have (on average 22.0) internal successors, (1496), 68 states have internal predecessors, (1496), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 02:48:49,958 INFO L175 Difference]: Start difference. First operand has 966 places, 2133 transitions, 103143 flow. Second operand 67 states and 578 transitions. [2023-11-29 02:48:49,958 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 1029 places, 2467 transitions, 119542 flow [2023-11-29 02:49:12,648 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 988 places, 2467 transitions, 118713 flow, removed 101 selfloop flow, removed 41 redundant places. [2023-11-29 02:49:12,749 INFO L231 Difference]: Finished difference. Result has 1017 places, 2307 transitions, 117423 flow [2023-11-29 02:49:12,751 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=22, PETRI_DIFFERENCE_MINUEND_FLOW=102375, PETRI_DIFFERENCE_MINUEND_PLACES=922, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=2133, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1292, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=758, PETRI_DIFFERENCE_SUBTRAHEND_STATES=67, PETRI_FLOW=117423, PETRI_PLACES=1017, PETRI_TRANSITIONS=2307} [2023-11-29 02:49:12,751 INFO L281 CegarLoopForPetriNet]: 24 programPoint places, 993 predicate places. [2023-11-29 02:49:12,751 INFO L495 AbstractCegarLoop]: Abstraction has has 1017 places, 2307 transitions, 117423 flow [2023-11-29 02:49:12,752 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) [2023-11-29 02:49:12,752 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 02:49:12,752 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 02:49:12,756 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dfd6f313-13a5-4a5c-8388-2a25e6fd4e43/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Ended with exit code 0 [2023-11-29 02:49:12,952 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25,25 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dfd6f313-13a5-4a5c-8388-2a25e6fd4e43/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 02:49:12,952 INFO L420 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-29 02:49:12,952 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 02:49:12,952 INFO L85 PathProgramCache]: Analyzing trace with hash -8770519, now seen corresponding path program 25 times [2023-11-29 02:49:12,953 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 02:49:12,953 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1204258389] [2023-11-29 02:49:12,953 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 02:49:12,953 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 02:49:12,961 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 02:49:13,162 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 02:49:13,162 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 02:49:13,162 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1204258389] [2023-11-29 02:49:13,162 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1204258389] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 02:49:13,162 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [884605250] [2023-11-29 02:49:13,162 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-11-29 02:49:13,163 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 02:49:13,163 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dfd6f313-13a5-4a5c-8388-2a25e6fd4e43/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 02:49:13,163 INFO L229 MonitoredProcess]: Starting monitored process 26 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dfd6f313-13a5-4a5c-8388-2a25e6fd4e43/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 02:49:13,164 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dfd6f313-13a5-4a5c-8388-2a25e6fd4e43/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Waiting until timeout for monitored process [2023-11-29 02:49:13,230 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 02:49:13,232 INFO L262 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 18 conjunts are in the unsatisfiable core [2023-11-29 02:49:13,232 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 02:49:13,512 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 02:49:13,512 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 02:49:14,055 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 02:49:14,055 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [884605250] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 02:49:14,055 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 02:49:14,055 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12, 12] total 33 [2023-11-29 02:49:14,055 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [949660579] [2023-11-29 02:49:14,055 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 02:49:14,055 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2023-11-29 02:49:14,056 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 02:49:14,056 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2023-11-29 02:49:14,056 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=201, Invalid=921, Unknown=0, NotChecked=0, Total=1122 [2023-11-29 02:49:14,071 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 22 [2023-11-29 02:49:14,071 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 1017 places, 2307 transitions, 117423 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) [2023-11-29 02:49:14,071 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 02:49:14,071 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 22 [2023-11-29 02:49:14,071 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 02:49:31,856 INFO L124 PetriNetUnfolderBase]: 5237/9530 cut-off events. [2023-11-29 02:49:31,856 INFO L125 PetriNetUnfolderBase]: For 1103897/1103897 co-relation queries the response was YES. [2023-11-29 02:49:32,002 INFO L83 FinitePrefix]: Finished finitePrefix Result has 194974 conditions, 9530 events. 5237/9530 cut-off events. For 1103897/1103897 co-relation queries the response was YES. Maximal size of possible extension queue 602. Compared 71579 event pairs, 205 based on Foata normal form. 9/9539 useless extension candidates. Maximal degree in co-relation 194391. Up to 4346 conditions per place. [2023-11-29 02:49:32,124 INFO L140 encePairwiseOnDemand]: 10/22 looper letters, 903 selfloop transitions, 1617 changer transitions 29/2550 dead transitions. [2023-11-29 02:49:32,124 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 1085 places, 2550 transitions, 129344 flow [2023-11-29 02:49:32,124 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 81 states. [2023-11-29 02:49:32,124 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 81 states. [2023-11-29 02:49:32,125 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81 states to 81 states and 667 transitions. [2023-11-29 02:49:32,125 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.37429854096520765 [2023-11-29 02:49:32,125 INFO L72 ComplementDD]: Start complementDD. Operand 81 states and 667 transitions. [2023-11-29 02:49:32,126 INFO L73 IsDeterministic]: Start isDeterministic. Operand 81 states and 667 transitions. [2023-11-29 02:49:32,126 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 02:49:32,126 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 81 states and 667 transitions. [2023-11-29 02:49:32,127 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 82 states, 81 states have (on average 8.234567901234568) internal successors, (667), 81 states have internal predecessors, (667), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 02:49:32,129 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 82 states, 82 states have (on average 22.0) internal successors, (1804), 82 states have internal predecessors, (1804), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 02:49:32,129 INFO L81 ComplementDD]: Finished complementDD. Result has 82 states, 82 states have (on average 22.0) internal successors, (1804), 82 states have internal predecessors, (1804), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 02:49:32,129 INFO L175 Difference]: Start difference. First operand has 1017 places, 2307 transitions, 117423 flow. Second operand 81 states and 667 transitions. [2023-11-29 02:49:32,129 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 1085 places, 2550 transitions, 129344 flow [2023-11-29 02:49:56,973 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 1051 places, 2550 transitions, 128782 flow, removed 91 selfloop flow, removed 34 redundant places. [2023-11-29 02:49:57,072 INFO L231 Difference]: Finished difference. Result has 1067 places, 2375 transitions, 126831 flow [2023-11-29 02:49:57,073 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=22, PETRI_DIFFERENCE_MINUEND_FLOW=116383, PETRI_DIFFERENCE_MINUEND_PLACES=971, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=2296, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1550, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=721, PETRI_DIFFERENCE_SUBTRAHEND_STATES=81, PETRI_FLOW=126831, PETRI_PLACES=1067, PETRI_TRANSITIONS=2375} [2023-11-29 02:49:57,074 INFO L281 CegarLoopForPetriNet]: 24 programPoint places, 1043 predicate places. [2023-11-29 02:49:57,074 INFO L495 AbstractCegarLoop]: Abstraction has has 1067 places, 2375 transitions, 126831 flow [2023-11-29 02:49:57,074 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) [2023-11-29 02:49:57,074 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 02:49:57,074 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 02:49:57,078 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dfd6f313-13a5-4a5c-8388-2a25e6fd4e43/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Ended with exit code 0 [2023-11-29 02:49:57,274 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26,26 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dfd6f313-13a5-4a5c-8388-2a25e6fd4e43/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 02:49:57,275 INFO L420 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-29 02:49:57,275 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 02:49:57,275 INFO L85 PathProgramCache]: Analyzing trace with hash -872919063, now seen corresponding path program 26 times [2023-11-29 02:49:57,275 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 02:49:57,275 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [938384218] [2023-11-29 02:49:57,275 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 02:49:57,275 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 02:49:57,284 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 02:49:57,483 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 02:49:57,483 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 02:49:57,483 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [938384218] [2023-11-29 02:49:57,483 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [938384218] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 02:49:57,483 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [29130723] [2023-11-29 02:49:57,484 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-29 02:49:57,484 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 02:49:57,484 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dfd6f313-13a5-4a5c-8388-2a25e6fd4e43/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 02:49:57,484 INFO L229 MonitoredProcess]: Starting monitored process 27 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dfd6f313-13a5-4a5c-8388-2a25e6fd4e43/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 02:49:57,485 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dfd6f313-13a5-4a5c-8388-2a25e6fd4e43/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Waiting until timeout for monitored process [2023-11-29 02:49:57,551 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-11-29 02:49:57,552 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-29 02:49:57,553 INFO L262 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 18 conjunts are in the unsatisfiable core [2023-11-29 02:49:57,553 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 02:49:57,817 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 02:49:57,817 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 02:49:58,348 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 02:49:58,348 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [29130723] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 02:49:58,348 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 02:49:58,349 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12, 12] total 33 [2023-11-29 02:49:58,349 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1528324418] [2023-11-29 02:49:58,349 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 02:49:58,349 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2023-11-29 02:49:58,349 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 02:49:58,350 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2023-11-29 02:49:58,350 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=170, Invalid=952, Unknown=0, NotChecked=0, Total=1122 [2023-11-29 02:49:58,357 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 22 [2023-11-29 02:49:58,358 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 1067 places, 2375 transitions, 126831 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) [2023-11-29 02:49:58,358 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 02:49:58,358 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 22 [2023-11-29 02:49:58,358 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 02:50:18,465 INFO L124 PetriNetUnfolderBase]: 5515/10079 cut-off events. [2023-11-29 02:50:18,465 INFO L125 PetriNetUnfolderBase]: For 1386387/1386387 co-relation queries the response was YES. [2023-11-29 02:50:18,632 INFO L83 FinitePrefix]: Finished finitePrefix Result has 217250 conditions, 10079 events. 5515/10079 cut-off events. For 1386387/1386387 co-relation queries the response was YES. Maximal size of possible extension queue 660. Compared 76969 event pairs, 207 based on Foata normal form. 5/10084 useless extension candidates. Maximal degree in co-relation 216650. Up to 4688 conditions per place. [2023-11-29 02:50:18,804 INFO L140 encePairwiseOnDemand]: 10/22 looper letters, 962 selfloop transitions, 1705 changer transitions 33/2701 dead transitions. [2023-11-29 02:50:18,804 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 1156 places, 2701 transitions, 143335 flow [2023-11-29 02:50:18,805 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 94 states. [2023-11-29 02:50:18,805 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 94 states. [2023-11-29 02:50:18,806 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 94 states to 94 states and 766 transitions. [2023-11-29 02:50:18,806 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3704061895551257 [2023-11-29 02:50:18,806 INFO L72 ComplementDD]: Start complementDD. Operand 94 states and 766 transitions. [2023-11-29 02:50:18,806 INFO L73 IsDeterministic]: Start isDeterministic. Operand 94 states and 766 transitions. [2023-11-29 02:50:18,806 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 02:50:18,807 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 94 states and 766 transitions. [2023-11-29 02:50:18,807 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 95 states, 94 states have (on average 8.148936170212766) internal successors, (766), 94 states have internal predecessors, (766), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 02:50:18,809 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 95 states, 95 states have (on average 22.0) internal successors, (2090), 95 states have internal predecessors, (2090), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 02:50:18,809 INFO L81 ComplementDD]: Finished complementDD. Result has 95 states, 95 states have (on average 22.0) internal successors, (2090), 95 states have internal predecessors, (2090), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 02:50:18,810 INFO L175 Difference]: Start difference. First operand has 1067 places, 2375 transitions, 126831 flow. Second operand 94 states and 766 transitions. [2023-11-29 02:50:18,810 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 1156 places, 2701 transitions, 143335 flow [2023-11-29 02:50:51,572 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 1110 places, 2701 transitions, 142302 flow, removed 312 selfloop flow, removed 46 redundant places. [2023-11-29 02:50:51,684 INFO L231 Difference]: Finished difference. Result has 1131 places, 2501 transitions, 139722 flow [2023-11-29 02:50:51,686 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=22, PETRI_DIFFERENCE_MINUEND_FLOW=125866, PETRI_DIFFERENCE_MINUEND_PLACES=1017, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=2375, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1596, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=755, PETRI_DIFFERENCE_SUBTRAHEND_STATES=94, PETRI_FLOW=139722, PETRI_PLACES=1131, PETRI_TRANSITIONS=2501} [2023-11-29 02:50:51,686 INFO L281 CegarLoopForPetriNet]: 24 programPoint places, 1107 predicate places. [2023-11-29 02:50:51,686 INFO L495 AbstractCegarLoop]: Abstraction has has 1131 places, 2501 transitions, 139722 flow [2023-11-29 02:50:51,687 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) [2023-11-29 02:50:51,687 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 02:50:51,687 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 02:50:51,691 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dfd6f313-13a5-4a5c-8388-2a25e6fd4e43/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Ended with exit code 0 [2023-11-29 02:50:51,887 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dfd6f313-13a5-4a5c-8388-2a25e6fd4e43/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27 [2023-11-29 02:50:51,887 INFO L420 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-29 02:50:51,887 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 02:50:51,888 INFO L85 PathProgramCache]: Analyzing trace with hash -1020085429, now seen corresponding path program 27 times [2023-11-29 02:50:51,888 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 02:50:51,888 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [431790818] [2023-11-29 02:50:51,888 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 02:50:51,888 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 02:50:51,898 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 02:50:52,092 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 02:50:52,092 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 02:50:52,092 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [431790818] [2023-11-29 02:50:52,092 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [431790818] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 02:50:52,092 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [547631056] [2023-11-29 02:50:52,093 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-11-29 02:50:52,093 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 02:50:52,093 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dfd6f313-13a5-4a5c-8388-2a25e6fd4e43/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 02:50:52,093 INFO L229 MonitoredProcess]: Starting monitored process 28 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dfd6f313-13a5-4a5c-8388-2a25e6fd4e43/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 02:50:52,094 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dfd6f313-13a5-4a5c-8388-2a25e6fd4e43/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Waiting until timeout for monitored process [2023-11-29 02:50:52,155 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2023-11-29 02:50:52,155 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-29 02:50:52,156 INFO L262 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 18 conjunts are in the unsatisfiable core [2023-11-29 02:50:52,157 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 02:50:52,400 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 02:50:52,400 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 02:50:52,946 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 02:50:52,947 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [547631056] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 02:50:52,947 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 02:50:52,947 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12, 12] total 33 [2023-11-29 02:50:52,947 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2096425014] [2023-11-29 02:50:52,947 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 02:50:52,947 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2023-11-29 02:50:52,948 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 02:50:52,948 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2023-11-29 02:50:52,948 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=167, Invalid=955, Unknown=0, NotChecked=0, Total=1122 [2023-11-29 02:50:52,960 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 22 [2023-11-29 02:50:52,961 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 1131 places, 2501 transitions, 139722 flow. Second operand has 34 states, 34 states have (on average 4.735294117647059) internal successors, (161), 34 states have internal predecessors, (161), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 02:50:52,961 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 02:50:52,961 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 22 [2023-11-29 02:50:52,961 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 02:51:15,105 INFO L124 PetriNetUnfolderBase]: 5617/10255 cut-off events. [2023-11-29 02:51:15,105 INFO L125 PetriNetUnfolderBase]: For 1539605/1539605 co-relation queries the response was YES. [2023-11-29 02:51:15,291 INFO L83 FinitePrefix]: Finished finitePrefix Result has 228829 conditions, 10255 events. 5617/10255 cut-off events. For 1539605/1539605 co-relation queries the response was YES. Maximal size of possible extension queue 683. Compared 78531 event pairs, 201 based on Foata normal form. 4/10259 useless extension candidates. Maximal degree in co-relation 228044. Up to 4273 conditions per place. [2023-11-29 02:51:15,457 INFO L140 encePairwiseOnDemand]: 10/22 looper letters, 905 selfloop transitions, 1831 changer transitions 19/2756 dead transitions. [2023-11-29 02:51:15,457 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 1206 places, 2756 transitions, 153003 flow [2023-11-29 02:51:15,458 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 81 states. [2023-11-29 02:51:15,458 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 81 states. [2023-11-29 02:51:15,458 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81 states to 81 states and 666 transitions. [2023-11-29 02:51:15,459 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.37373737373737376 [2023-11-29 02:51:15,459 INFO L72 ComplementDD]: Start complementDD. Operand 81 states and 666 transitions. [2023-11-29 02:51:15,459 INFO L73 IsDeterministic]: Start isDeterministic. Operand 81 states and 666 transitions. [2023-11-29 02:51:15,459 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 02:51:15,459 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 81 states and 666 transitions. [2023-11-29 02:51:15,460 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 82 states, 81 states have (on average 8.222222222222221) internal successors, (666), 81 states have internal predecessors, (666), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 02:51:15,462 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 82 states, 82 states have (on average 22.0) internal successors, (1804), 82 states have internal predecessors, (1804), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 02:51:15,462 INFO L81 ComplementDD]: Finished complementDD. Result has 82 states, 82 states have (on average 22.0) internal successors, (1804), 82 states have internal predecessors, (1804), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 02:51:15,462 INFO L175 Difference]: Start difference. First operand has 1131 places, 2501 transitions, 139722 flow. Second operand 81 states and 666 transitions. [2023-11-29 02:51:15,462 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 1206 places, 2756 transitions, 153003 flow [2023-11-29 02:51:50,591 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 1150 places, 2756 transitions, 151517 flow, removed 450 selfloop flow, removed 56 redundant places. [2023-11-29 02:51:50,707 INFO L231 Difference]: Finished difference. Result has 1164 places, 2575 transitions, 148624 flow [2023-11-29 02:51:50,709 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=22, PETRI_DIFFERENCE_MINUEND_FLOW=138502, PETRI_DIFFERENCE_MINUEND_PLACES=1070, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=2499, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1757, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=710, PETRI_DIFFERENCE_SUBTRAHEND_STATES=81, PETRI_FLOW=148624, PETRI_PLACES=1164, PETRI_TRANSITIONS=2575} [2023-11-29 02:51:50,710 INFO L281 CegarLoopForPetriNet]: 24 programPoint places, 1140 predicate places. [2023-11-29 02:51:50,710 INFO L495 AbstractCegarLoop]: Abstraction has has 1164 places, 2575 transitions, 148624 flow [2023-11-29 02:51:50,710 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 34 states have (on average 4.735294117647059) internal successors, (161), 34 states have internal predecessors, (161), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 02:51:50,710 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 02:51:50,710 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 02:51:50,715 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dfd6f313-13a5-4a5c-8388-2a25e6fd4e43/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Forceful destruction successful, exit code 0 [2023-11-29 02:51:50,910 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dfd6f313-13a5-4a5c-8388-2a25e6fd4e43/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2023-11-29 02:51:50,911 INFO L420 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-29 02:51:50,911 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 02:51:50,911 INFO L85 PathProgramCache]: Analyzing trace with hash -155936885, now seen corresponding path program 28 times [2023-11-29 02:51:50,911 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 02:51:50,911 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1883925850] [2023-11-29 02:51:50,911 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 02:51:50,911 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 02:51:50,920 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 02:51:51,114 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 02:51:51,115 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 02:51:51,115 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1883925850] [2023-11-29 02:51:51,115 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1883925850] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 02:51:51,115 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1877421281] [2023-11-29 02:51:51,115 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-11-29 02:51:51,115 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 02:51:51,115 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dfd6f313-13a5-4a5c-8388-2a25e6fd4e43/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 02:51:51,116 INFO L229 MonitoredProcess]: Starting monitored process 29 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dfd6f313-13a5-4a5c-8388-2a25e6fd4e43/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 02:51:51,117 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dfd6f313-13a5-4a5c-8388-2a25e6fd4e43/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Waiting until timeout for monitored process [2023-11-29 02:51:51,182 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-11-29 02:51:51,182 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-29 02:51:51,183 INFO L262 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 18 conjunts are in the unsatisfiable core [2023-11-29 02:51:51,184 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 02:51:51,431 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 02:51:51,431 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 02:51:51,898 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 02:51:51,898 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1877421281] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 02:51:51,898 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 02:51:51,899 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12, 12] total 33 [2023-11-29 02:51:51,899 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1332823399] [2023-11-29 02:51:51,899 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 02:51:51,899 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2023-11-29 02:51:51,899 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 02:51:51,900 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2023-11-29 02:51:51,900 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=196, Invalid=926, Unknown=0, NotChecked=0, Total=1122 [2023-11-29 02:51:51,908 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 22 [2023-11-29 02:51:51,908 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 1164 places, 2575 transitions, 148624 flow. Second operand has 34 states, 34 states have (on average 4.735294117647059) internal successors, (161), 34 states have internal predecessors, (161), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 02:51:51,909 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 02:51:51,909 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 22 [2023-11-29 02:51:51,909 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 02:52:13,425 INFO L124 PetriNetUnfolderBase]: 5626/10253 cut-off events. [2023-11-29 02:52:13,425 INFO L125 PetriNetUnfolderBase]: For 1648970/1648970 co-relation queries the response was YES. [2023-11-29 02:52:13,723 INFO L83 FinitePrefix]: Finished finitePrefix Result has 235548 conditions, 10253 events. 5626/10253 cut-off events. For 1648970/1648970 co-relation queries the response was YES. Maximal size of possible extension queue 677. Compared 78278 event pairs, 217 based on Foata normal form. 3/10256 useless extension candidates. Maximal degree in co-relation 234801. Up to 4561 conditions per place. [2023-11-29 02:52:13,849 INFO L140 encePairwiseOnDemand]: 11/22 looper letters, 829 selfloop transitions, 1904 changer transitions 16/2750 dead transitions. [2023-11-29 02:52:13,849 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 1242 places, 2750 transitions, 157830 flow [2023-11-29 02:52:13,850 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 82 states. [2023-11-29 02:52:13,850 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 82 states. [2023-11-29 02:52:13,851 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 82 states to 82 states and 645 transitions. [2023-11-29 02:52:13,851 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3575388026607539 [2023-11-29 02:52:13,851 INFO L72 ComplementDD]: Start complementDD. Operand 82 states and 645 transitions. [2023-11-29 02:52:13,851 INFO L73 IsDeterministic]: Start isDeterministic. Operand 82 states and 645 transitions. [2023-11-29 02:52:13,852 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 02:52:13,852 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 82 states and 645 transitions. [2023-11-29 02:52:13,853 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 83 states, 82 states have (on average 7.865853658536586) internal successors, (645), 82 states have internal predecessors, (645), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 02:52:13,855 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 83 states, 83 states have (on average 22.0) internal successors, (1826), 83 states have internal predecessors, (1826), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 02:52:13,855 INFO L81 ComplementDD]: Finished complementDD. Result has 83 states, 83 states have (on average 22.0) internal successors, (1826), 83 states have internal predecessors, (1826), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 02:52:13,855 INFO L175 Difference]: Start difference. First operand has 1164 places, 2575 transitions, 148624 flow. Second operand 82 states and 645 transitions. [2023-11-29 02:52:13,855 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 1242 places, 2750 transitions, 157830 flow [2023-11-29 02:52:52,621 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 1192 places, 2750 transitions, 156619 flow, removed 286 selfloop flow, removed 50 redundant places. [2023-11-29 02:52:52,747 INFO L231 Difference]: Finished difference. Result has 1197 places, 2590 transitions, 152772 flow [2023-11-29 02:52:52,749 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=22, PETRI_DIFFERENCE_MINUEND_FLOW=147416, PETRI_DIFFERENCE_MINUEND_PLACES=1111, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=2574, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1888, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=680, PETRI_DIFFERENCE_SUBTRAHEND_STATES=82, PETRI_FLOW=152772, PETRI_PLACES=1197, PETRI_TRANSITIONS=2590} [2023-11-29 02:52:52,749 INFO L281 CegarLoopForPetriNet]: 24 programPoint places, 1173 predicate places. [2023-11-29 02:52:52,749 INFO L495 AbstractCegarLoop]: Abstraction has has 1197 places, 2590 transitions, 152772 flow [2023-11-29 02:52:52,749 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 34 states have (on average 4.735294117647059) internal successors, (161), 34 states have internal predecessors, (161), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 02:52:52,750 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 02:52:52,750 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 02:52:52,754 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dfd6f313-13a5-4a5c-8388-2a25e6fd4e43/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Ended with exit code 0 [2023-11-29 02:52:52,950 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,29 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dfd6f313-13a5-4a5c-8388-2a25e6fd4e43/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 02:52:52,950 INFO L420 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-29 02:52:52,951 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 02:52:52,951 INFO L85 PathProgramCache]: Analyzing trace with hash 596642341, now seen corresponding path program 29 times [2023-11-29 02:52:52,951 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 02:52:52,951 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [352727329] [2023-11-29 02:52:52,951 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 02:52:52,951 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 02:52:52,958 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 02:52:53,118 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 02:52:53,118 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 02:52:53,119 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [352727329] [2023-11-29 02:52:53,119 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [352727329] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 02:52:53,119 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1588934274] [2023-11-29 02:52:53,119 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-11-29 02:52:53,119 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 02:52:53,119 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dfd6f313-13a5-4a5c-8388-2a25e6fd4e43/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 02:52:53,120 INFO L229 MonitoredProcess]: Starting monitored process 30 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dfd6f313-13a5-4a5c-8388-2a25e6fd4e43/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 02:52:53,121 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dfd6f313-13a5-4a5c-8388-2a25e6fd4e43/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Waiting until timeout for monitored process [2023-11-29 02:52:53,191 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2023-11-29 02:52:53,191 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-29 02:52:53,192 INFO L262 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 19 conjunts are in the unsatisfiable core [2023-11-29 02:52:53,193 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 02:52:53,396 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 02:52:53,396 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 02:52:53,653 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 02:52:53,653 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1588934274] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 02:52:53,653 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 02:52:53,653 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 13, 13] total 34 [2023-11-29 02:52:53,653 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [233241823] [2023-11-29 02:52:53,653 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 02:52:53,654 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2023-11-29 02:52:53,654 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 02:52:53,654 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2023-11-29 02:52:53,654 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=180, Invalid=1010, Unknown=0, NotChecked=0, Total=1190 [2023-11-29 02:52:53,663 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 22 [2023-11-29 02:52:53,664 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 1197 places, 2590 transitions, 152772 flow. Second operand has 35 states, 35 states have (on average 4.685714285714286) internal successors, (164), 35 states have internal predecessors, (164), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 02:52:53,664 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 02:52:53,664 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 22 [2023-11-29 02:52:53,664 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 02:53:14,114 INFO L124 PetriNetUnfolderBase]: 5981/11019 cut-off events. [2023-11-29 02:53:14,114 INFO L125 PetriNetUnfolderBase]: For 1877700/1877700 co-relation queries the response was YES. [2023-11-29 02:53:14,448 INFO L83 FinitePrefix]: Finished finitePrefix Result has 261152 conditions, 11019 events. 5981/11019 cut-off events. For 1877700/1877700 co-relation queries the response was YES. Maximal size of possible extension queue 737. Compared 86440 event pairs, 270 based on Foata normal form. 13/11032 useless extension candidates. Maximal degree in co-relation 260290. Up to 6292 conditions per place. [2023-11-29 02:53:14,560 INFO L140 encePairwiseOnDemand]: 11/22 looper letters, 1051 selfloop transitions, 1825 changer transitions 31/2908 dead transitions. [2023-11-29 02:53:14,560 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 1246 places, 2908 transitions, 174685 flow [2023-11-29 02:53:14,561 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 60 states. [2023-11-29 02:53:14,561 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 60 states. [2023-11-29 02:53:14,562 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 462 transitions. [2023-11-29 02:53:14,562 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.35 [2023-11-29 02:53:14,562 INFO L72 ComplementDD]: Start complementDD. Operand 60 states and 462 transitions. [2023-11-29 02:53:14,563 INFO L73 IsDeterministic]: Start isDeterministic. Operand 60 states and 462 transitions. [2023-11-29 02:53:14,563 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 02:53:14,563 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 60 states and 462 transitions. [2023-11-29 02:53:14,564 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 61 states, 60 states have (on average 7.7) internal successors, (462), 60 states have internal predecessors, (462), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 02:53:14,565 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 61 states, 61 states have (on average 22.0) internal successors, (1342), 61 states have internal predecessors, (1342), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 02:53:14,565 INFO L81 ComplementDD]: Finished complementDD. Result has 61 states, 61 states have (on average 22.0) internal successors, (1342), 61 states have internal predecessors, (1342), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 02:53:14,565 INFO L175 Difference]: Start difference. First operand has 1197 places, 2590 transitions, 152772 flow. Second operand 60 states and 462 transitions. [2023-11-29 02:53:14,565 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 1246 places, 2908 transitions, 174685 flow [2023-11-29 02:53:57,801 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 1192 places, 2908 transitions, 173397 flow, removed 193 selfloop flow, removed 54 redundant places. [2023-11-29 02:53:57,931 INFO L231 Difference]: Finished difference. Result has 1212 places, 2758 transitions, 171292 flow [2023-11-29 02:53:57,933 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=22, PETRI_DIFFERENCE_MINUEND_FLOW=150640, PETRI_DIFFERENCE_MINUEND_PLACES=1133, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=2565, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1639, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=843, PETRI_DIFFERENCE_SUBTRAHEND_STATES=60, PETRI_FLOW=171292, PETRI_PLACES=1212, PETRI_TRANSITIONS=2758} [2023-11-29 02:53:57,933 INFO L281 CegarLoopForPetriNet]: 24 programPoint places, 1188 predicate places. [2023-11-29 02:53:57,934 INFO L495 AbstractCegarLoop]: Abstraction has has 1212 places, 2758 transitions, 171292 flow [2023-11-29 02:53:57,934 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 35 states, 35 states have (on average 4.685714285714286) internal successors, (164), 35 states have internal predecessors, (164), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 02:53:57,934 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 02:53:57,934 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 02:53:57,938 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dfd6f313-13a5-4a5c-8388-2a25e6fd4e43/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Ended with exit code 0 [2023-11-29 02:53:58,134 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30,30 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dfd6f313-13a5-4a5c-8388-2a25e6fd4e43/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 02:53:58,134 INFO L420 AbstractCegarLoop]: === Iteration 32 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-29 02:53:58,134 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 02:53:58,135 INFO L85 PathProgramCache]: Analyzing trace with hash -2097139837, now seen corresponding path program 30 times [2023-11-29 02:53:58,135 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 02:53:58,135 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1674156610] [2023-11-29 02:53:58,135 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 02:53:58,135 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 02:53:58,142 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 02:53:58,318 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 02:53:58,318 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 02:53:58,318 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1674156610] [2023-11-29 02:53:58,318 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1674156610] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 02:53:58,318 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1788263161] [2023-11-29 02:53:58,318 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-11-29 02:53:58,319 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 02:53:58,319 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dfd6f313-13a5-4a5c-8388-2a25e6fd4e43/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 02:53:58,319 INFO L229 MonitoredProcess]: Starting monitored process 31 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dfd6f313-13a5-4a5c-8388-2a25e6fd4e43/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 02:53:58,320 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dfd6f313-13a5-4a5c-8388-2a25e6fd4e43/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Waiting until timeout for monitored process [2023-11-29 02:53:58,385 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2023-11-29 02:53:58,385 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-29 02:53:58,386 INFO L262 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 18 conjunts are in the unsatisfiable core [2023-11-29 02:53:58,387 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 02:53:58,641 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 02:53:58,642 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 02:53:59,097 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 02:53:59,097 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1788263161] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 02:53:59,097 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 02:53:59,097 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12, 12] total 33 [2023-11-29 02:53:59,097 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1156380692] [2023-11-29 02:53:59,097 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 02:53:59,098 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2023-11-29 02:53:59,098 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 02:53:59,098 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2023-11-29 02:53:59,098 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=176, Invalid=946, Unknown=0, NotChecked=0, Total=1122 [2023-11-29 02:53:59,106 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 22 [2023-11-29 02:53:59,106 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 1212 places, 2758 transitions, 171292 flow. Second operand has 34 states, 34 states have (on average 4.735294117647059) internal successors, (161), 34 states have internal predecessors, (161), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 02:53:59,106 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 02:53:59,106 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 22 [2023-11-29 02:53:59,106 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 02:54:22,860 INFO L124 PetriNetUnfolderBase]: 6226/11477 cut-off events. [2023-11-29 02:54:22,860 INFO L125 PetriNetUnfolderBase]: For 2024176/2024176 co-relation queries the response was YES. [2023-11-29 02:54:23,086 INFO L83 FinitePrefix]: Finished finitePrefix Result has 279593 conditions, 11477 events. 6226/11477 cut-off events. For 2024176/2024176 co-relation queries the response was YES. Maximal size of possible extension queue 757. Compared 90862 event pairs, 239 based on Foata normal form. 4/11481 useless extension candidates. Maximal degree in co-relation 279262. Up to 6585 conditions per place. [2023-11-29 02:54:23,200 INFO L140 encePairwiseOnDemand]: 11/22 looper letters, 1154 selfloop transitions, 1881 changer transitions 20/3056 dead transitions. [2023-11-29 02:54:23,201 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 1279 places, 3056 transitions, 189462 flow [2023-11-29 02:54:23,201 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 70 states. [2023-11-29 02:54:23,201 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 70 states. [2023-11-29 02:54:23,202 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70 states to 70 states and 528 transitions. [2023-11-29 02:54:23,202 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.34285714285714286 [2023-11-29 02:54:23,202 INFO L72 ComplementDD]: Start complementDD. Operand 70 states and 528 transitions. [2023-11-29 02:54:23,202 INFO L73 IsDeterministic]: Start isDeterministic. Operand 70 states and 528 transitions. [2023-11-29 02:54:23,202 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 02:54:23,203 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 70 states and 528 transitions. [2023-11-29 02:54:23,203 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 71 states, 70 states have (on average 7.542857142857143) internal successors, (528), 70 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) [2023-11-29 02:54:23,205 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 71 states, 71 states have (on average 22.0) internal successors, (1562), 71 states have internal predecessors, (1562), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 02:54:23,206 INFO L81 ComplementDD]: Finished complementDD. Result has 71 states, 71 states have (on average 22.0) internal successors, (1562), 71 states have internal predecessors, (1562), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 02:54:23,206 INFO L175 Difference]: Start difference. First operand has 1212 places, 2758 transitions, 171292 flow. Second operand 70 states and 528 transitions. [2023-11-29 02:54:23,206 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 1279 places, 3056 transitions, 189462 flow [2023-11-29 02:55:13,666 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 1256 places, 3056 transitions, 186845 flow, removed 331 selfloop flow, removed 23 redundant places. [2023-11-29 02:55:13,811 INFO L231 Difference]: Finished difference. Result has 1275 places, 2923 transitions, 186235 flow [2023-11-29 02:55:13,813 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=22, PETRI_DIFFERENCE_MINUEND_FLOW=168769, PETRI_DIFFERENCE_MINUEND_PLACES=1187, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=2758, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1730, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=967, PETRI_DIFFERENCE_SUBTRAHEND_STATES=70, PETRI_FLOW=186235, PETRI_PLACES=1275, PETRI_TRANSITIONS=2923} [2023-11-29 02:55:13,813 INFO L281 CegarLoopForPetriNet]: 24 programPoint places, 1251 predicate places. [2023-11-29 02:55:13,813 INFO L495 AbstractCegarLoop]: Abstraction has has 1275 places, 2923 transitions, 186235 flow [2023-11-29 02:55:13,813 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 34 states have (on average 4.735294117647059) internal successors, (161), 34 states have internal predecessors, (161), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 02:55:13,813 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 02:55:13,813 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 02:55:13,818 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dfd6f313-13a5-4a5c-8388-2a25e6fd4e43/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Ended with exit code 0 [2023-11-29 02:55:14,014 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31,31 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dfd6f313-13a5-4a5c-8388-2a25e6fd4e43/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 02:55:14,014 INFO L420 AbstractCegarLoop]: === Iteration 33 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-29 02:55:14,014 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 02:55:14,014 INFO L85 PathProgramCache]: Analyzing trace with hash 662110471, now seen corresponding path program 31 times [2023-11-29 02:55:14,014 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 02:55:14,014 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [847729036] [2023-11-29 02:55:14,015 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 02:55:14,015 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 02:55:14,023 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 02:55:14,212 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 02:55:14,212 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 02:55:14,212 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [847729036] [2023-11-29 02:55:14,212 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [847729036] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 02:55:14,212 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1704339097] [2023-11-29 02:55:14,212 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-11-29 02:55:14,213 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 02:55:14,213 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dfd6f313-13a5-4a5c-8388-2a25e6fd4e43/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 02:55:14,213 INFO L229 MonitoredProcess]: Starting monitored process 32 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dfd6f313-13a5-4a5c-8388-2a25e6fd4e43/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 02:55:14,214 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dfd6f313-13a5-4a5c-8388-2a25e6fd4e43/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Waiting until timeout for monitored process [2023-11-29 02:55:14,278 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 02:55:14,279 INFO L262 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 18 conjunts are in the unsatisfiable core [2023-11-29 02:55:14,280 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 02:55:14,563 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 02:55:14,564 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 02:55:15,209 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 02:55:15,209 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1704339097] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 02:55:15,209 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 02:55:15,210 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12, 12] total 33 [2023-11-29 02:55:15,210 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [338949514] [2023-11-29 02:55:15,210 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 02:55:15,210 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2023-11-29 02:55:15,210 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 02:55:15,210 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2023-11-29 02:55:15,211 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=147, Invalid=975, Unknown=0, NotChecked=0, Total=1122 [2023-11-29 02:55:15,221 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 22 [2023-11-29 02:55:15,221 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 1275 places, 2923 transitions, 186235 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) [2023-11-29 02:55:15,221 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 02:55:15,221 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 22 [2023-11-29 02:55:15,221 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 02:55:42,183 INFO L124 PetriNetUnfolderBase]: 6384/11783 cut-off events. [2023-11-29 02:55:42,183 INFO L125 PetriNetUnfolderBase]: For 2213075/2213075 co-relation queries the response was YES. [2023-11-29 02:55:42,433 INFO L83 FinitePrefix]: Finished finitePrefix Result has 295128 conditions, 11783 events. 6384/11783 cut-off events. For 2213075/2213075 co-relation queries the response was YES. Maximal size of possible extension queue 794. Compared 93889 event pairs, 237 based on Foata normal form. 4/11787 useless extension candidates. Maximal degree in co-relation 294382. Up to 6600 conditions per place. [2023-11-29 02:55:42,554 INFO L140 encePairwiseOnDemand]: 10/22 looper letters, 1224 selfloop transitions, 1887 changer transitions 26/3138 dead transitions. [2023-11-29 02:55:42,554 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 1334 places, 3138 transitions, 200580 flow [2023-11-29 02:55:42,555 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 63 states. [2023-11-29 02:55:42,555 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 63 states. [2023-11-29 02:55:42,555 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 521 transitions. [2023-11-29 02:55:42,556 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3759018759018759 [2023-11-29 02:55:42,556 INFO L72 ComplementDD]: Start complementDD. Operand 63 states and 521 transitions. [2023-11-29 02:55:42,556 INFO L73 IsDeterministic]: Start isDeterministic. Operand 63 states and 521 transitions. [2023-11-29 02:55:42,556 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 02:55:42,556 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 63 states and 521 transitions. [2023-11-29 02:55:42,557 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 64 states, 63 states have (on average 8.26984126984127) internal successors, (521), 63 states have internal predecessors, (521), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 02:55:42,558 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) [2023-11-29 02:55:42,558 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) [2023-11-29 02:55:42,558 INFO L175 Difference]: Start difference. First operand has 1275 places, 2923 transitions, 186235 flow. Second operand 63 states and 521 transitions. [2023-11-29 02:55:42,558 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 1334 places, 3138 transitions, 200580 flow [2023-11-29 02:56:39,745 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 1309 places, 3138 transitions, 200029 flow, removed 191 selfloop flow, removed 25 redundant places. [2023-11-29 02:56:39,944 INFO L231 Difference]: Finished difference. Result has 1328 places, 3005 transitions, 198254 flow [2023-11-29 02:56:39,946 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=22, PETRI_DIFFERENCE_MINUEND_FLOW=185702, PETRI_DIFFERENCE_MINUEND_PLACES=1247, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=2923, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1806, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=1085, PETRI_DIFFERENCE_SUBTRAHEND_STATES=63, PETRI_FLOW=198254, PETRI_PLACES=1328, PETRI_TRANSITIONS=3005} [2023-11-29 02:56:39,947 INFO L281 CegarLoopForPetriNet]: 24 programPoint places, 1304 predicate places. [2023-11-29 02:56:39,947 INFO L495 AbstractCegarLoop]: Abstraction has has 1328 places, 3005 transitions, 198254 flow [2023-11-29 02:56:39,947 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) [2023-11-29 02:56:39,947 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 02:56:39,947 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 02:56:39,952 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dfd6f313-13a5-4a5c-8388-2a25e6fd4e43/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Ended with exit code 0 [2023-11-29 02:56:40,147 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 32 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dfd6f313-13a5-4a5c-8388-2a25e6fd4e43/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable32 [2023-11-29 02:56:40,148 INFO L420 AbstractCegarLoop]: === Iteration 34 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-29 02:56:40,148 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 02:56:40,148 INFO L85 PathProgramCache]: Analyzing trace with hash -1085074681, now seen corresponding path program 32 times [2023-11-29 02:56:40,148 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 02:56:40,148 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [989755823] [2023-11-29 02:56:40,148 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 02:56:40,148 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 02:56:40,157 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 02:56:40,356 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 02:56:40,357 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 02:56:40,357 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [989755823] [2023-11-29 02:56:40,357 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [989755823] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 02:56:40,357 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [813752178] [2023-11-29 02:56:40,357 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-29 02:56:40,357 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 02:56:40,357 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dfd6f313-13a5-4a5c-8388-2a25e6fd4e43/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 02:56:40,358 INFO L229 MonitoredProcess]: Starting monitored process 33 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dfd6f313-13a5-4a5c-8388-2a25e6fd4e43/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 02:56:40,358 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dfd6f313-13a5-4a5c-8388-2a25e6fd4e43/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Waiting until timeout for monitored process [2023-11-29 02:56:40,426 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-11-29 02:56:40,426 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-29 02:56:40,427 INFO L262 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 18 conjunts are in the unsatisfiable core [2023-11-29 02:56:40,428 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 02:56:40,726 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 02:56:40,726 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 02:56:41,350 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 02:56:41,350 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [813752178] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 02:56:41,350 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 02:56:41,350 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12, 12] total 33 [2023-11-29 02:56:41,350 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [56552711] [2023-11-29 02:56:41,350 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 02:56:41,351 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2023-11-29 02:56:41,351 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 02:56:41,351 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2023-11-29 02:56:41,352 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=168, Invalid=954, Unknown=0, NotChecked=0, Total=1122 [2023-11-29 02:56:41,360 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 22 [2023-11-29 02:56:41,361 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 1328 places, 3005 transitions, 198254 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) [2023-11-29 02:56:41,361 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 02:56:41,361 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 22 [2023-11-29 02:56:41,361 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 02:57:16,499 INFO L124 PetriNetUnfolderBase]: 6784/12558 cut-off events. [2023-11-29 02:57:16,499 INFO L125 PetriNetUnfolderBase]: For 2654991/2654991 co-relation queries the response was YES. [2023-11-29 02:57:16,814 INFO L83 FinitePrefix]: Finished finitePrefix Result has 327283 conditions, 12558 events. 6784/12558 cut-off events. For 2654991/2654991 co-relation queries the response was YES. Maximal size of possible extension queue 865. Compared 101750 event pairs, 267 based on Foata normal form. 5/12563 useless extension candidates. Maximal degree in co-relation 326513. Up to 6226 conditions per place. [2023-11-29 02:57:16,974 INFO L140 encePairwiseOnDemand]: 10/22 looper letters, 1181 selfloop transitions, 2146 changer transitions 35/3363 dead transitions. [2023-11-29 02:57:16,975 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 1405 places, 3363 transitions, 221590 flow [2023-11-29 02:57:16,975 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 83 states. [2023-11-29 02:57:16,975 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 83 states. [2023-11-29 02:57:16,976 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 83 states to 83 states and 683 transitions. [2023-11-29 02:57:16,977 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.37404162102957283 [2023-11-29 02:57:16,977 INFO L72 ComplementDD]: Start complementDD. Operand 83 states and 683 transitions. [2023-11-29 02:57:16,977 INFO L73 IsDeterministic]: Start isDeterministic. Operand 83 states and 683 transitions. [2023-11-29 02:57:16,977 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 02:57:16,977 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 83 states and 683 transitions. [2023-11-29 02:57:16,978 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 84 states, 83 states have (on average 8.228915662650602) internal successors, (683), 83 states have internal predecessors, (683), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 02:57:16,980 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 84 states, 84 states have (on average 22.0) internal successors, (1848), 84 states have internal predecessors, (1848), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 02:57:16,980 INFO L81 ComplementDD]: Finished complementDD. Result has 84 states, 84 states have (on average 22.0) internal successors, (1848), 84 states have internal predecessors, (1848), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 02:57:16,981 INFO L175 Difference]: Start difference. First operand has 1328 places, 3005 transitions, 198254 flow. Second operand 83 states and 683 transitions. [2023-11-29 02:57:16,981 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 1405 places, 3363 transitions, 221590 flow