./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/weaver/popl20-more-nonblocking-counter-alt2.wvr.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 0e0057cc Calling Ultimate with: /usr/lib/jvm/java-11-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ab7c961-5a72-428b-8a60-70c6308b0128/bin/uautomizer-verify-BQ2R08f2Ya/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ab7c961-5a72-428b-8a60-70c6308b0128/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_3ab7c961-5a72-428b-8a60-70c6308b0128/bin/uautomizer-verify-BQ2R08f2Ya/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ab7c961-5a72-428b-8a60-70c6308b0128/bin/uautomizer-verify-BQ2R08f2Ya/config/AutomizerReach.xml -i ../../sv-benchmarks/c/weaver/popl20-more-nonblocking-counter-alt2.wvr.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ab7c961-5a72-428b-8a60-70c6308b0128/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_3ab7c961-5a72-428b-8a60-70c6308b0128/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 87e1a1d3acb3ee9b7a4a97eb7b14df31d5b38b7566b1218cea0dabfe5ec8ddbd --- Real Ultimate output --- This is Ultimate 0.2.4-dev-0e0057c [2023-11-29 00:01:30,787 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-11-29 00:01:30,853 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ab7c961-5a72-428b-8a60-70c6308b0128/bin/uautomizer-verify-BQ2R08f2Ya/config/svcomp-Reach-32bit-Automizer_Default.epf [2023-11-29 00:01:30,857 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-11-29 00:01:30,858 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-11-29 00:01:30,892 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-11-29 00:01:30,893 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-11-29 00:01:30,893 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-11-29 00:01:30,894 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2023-11-29 00:01:30,894 INFO L153 SettingsManager]: * Use memory slicer=true [2023-11-29 00:01:30,895 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-11-29 00:01:30,895 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-11-29 00:01:30,896 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-11-29 00:01:30,896 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-11-29 00:01:30,897 INFO L153 SettingsManager]: * Use SBE=true [2023-11-29 00:01:30,898 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-11-29 00:01:30,898 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-11-29 00:01:30,899 INFO L153 SettingsManager]: * sizeof long=4 [2023-11-29 00:01:30,899 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-11-29 00:01:30,899 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-11-29 00:01:30,900 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-11-29 00:01:30,900 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-11-29 00:01:30,901 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-11-29 00:01:30,901 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-11-29 00:01:30,902 INFO L153 SettingsManager]: * sizeof long double=12 [2023-11-29 00:01:30,902 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-11-29 00:01:30,903 INFO L153 SettingsManager]: * Use constant arrays=true [2023-11-29 00:01:30,903 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-11-29 00:01:30,903 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-11-29 00:01:30,904 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2023-11-29 00:01:30,904 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-11-29 00:01:30,905 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2023-11-29 00:01:30,905 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-11-29 00:01:30,921 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-11-29 00:01:30,921 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2023-11-29 00:01:30,921 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-11-29 00:01:30,921 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-11-29 00:01:30,921 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2023-11-29 00:01:30,921 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-11-29 00:01:30,922 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-11-29 00:01:30,922 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-11-29 00:01:30,922 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-11-29 00:01:30,922 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_3ab7c961-5a72-428b-8a60-70c6308b0128/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ab7c961-5a72-428b-8a60-70c6308b0128/bin/uautomizer-verify-BQ2R08f2Ya Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 87e1a1d3acb3ee9b7a4a97eb7b14df31d5b38b7566b1218cea0dabfe5ec8ddbd [2023-11-29 00:01:31,157 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-11-29 00:01:31,184 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-11-29 00:01:31,186 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-11-29 00:01:31,187 INFO L270 PluginConnector]: Initializing CDTParser... [2023-11-29 00:01:31,187 INFO L274 PluginConnector]: CDTParser initialized [2023-11-29 00:01:31,188 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ab7c961-5a72-428b-8a60-70c6308b0128/bin/uautomizer-verify-BQ2R08f2Ya/../../sv-benchmarks/c/weaver/popl20-more-nonblocking-counter-alt2.wvr.c [2023-11-29 00:01:33,886 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-11-29 00:01:34,080 INFO L384 CDTParser]: Found 1 translation units. [2023-11-29 00:01:34,081 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ab7c961-5a72-428b-8a60-70c6308b0128/sv-benchmarks/c/weaver/popl20-more-nonblocking-counter-alt2.wvr.c [2023-11-29 00:01:34,087 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ab7c961-5a72-428b-8a60-70c6308b0128/bin/uautomizer-verify-BQ2R08f2Ya/data/6eaf459be/1d388361484f4134b7cb2af392f455b8/FLAGc25a5db81 [2023-11-29 00:01:34,100 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ab7c961-5a72-428b-8a60-70c6308b0128/bin/uautomizer-verify-BQ2R08f2Ya/data/6eaf459be/1d388361484f4134b7cb2af392f455b8 [2023-11-29 00:01:34,102 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-11-29 00:01:34,104 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2023-11-29 00:01:34,105 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-11-29 00:01:34,105 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-11-29 00:01:34,111 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-11-29 00:01:34,112 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 29.11 12:01:34" (1/1) ... [2023-11-29 00:01:34,113 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3c32c874 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 12:01:34, skipping insertion in model container [2023-11-29 00:01:34,113 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 29.11 12:01:34" (1/1) ... [2023-11-29 00:01:34,137 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-11-29 00:01:34,305 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_3ab7c961-5a72-428b-8a60-70c6308b0128/sv-benchmarks/c/weaver/popl20-more-nonblocking-counter-alt2.wvr.c[2173,2186] [2023-11-29 00:01:34,309 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-29 00:01:34,318 INFO L202 MainTranslator]: Completed pre-run [2023-11-29 00:01:34,336 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_3ab7c961-5a72-428b-8a60-70c6308b0128/sv-benchmarks/c/weaver/popl20-more-nonblocking-counter-alt2.wvr.c[2173,2186] [2023-11-29 00:01:34,337 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-29 00:01:34,344 WARN L675 CHandler]: The function __VERIFIER_atomic_begin is called, but not defined or handled by StandardFunctionHandler. [2023-11-29 00:01:34,344 WARN L675 CHandler]: The function __VERIFIER_atomic_end is called, but not defined or handled by StandardFunctionHandler. [2023-11-29 00:01:34,350 INFO L206 MainTranslator]: Completed translation [2023-11-29 00:01:34,350 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 12:01:34 WrapperNode [2023-11-29 00:01:34,350 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-11-29 00:01:34,352 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-11-29 00:01:34,352 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-11-29 00:01:34,352 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-11-29 00:01:34,359 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 12:01:34" (1/1) ... [2023-11-29 00:01:34,367 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 12:01:34" (1/1) ... [2023-11-29 00:01:34,383 INFO L138 Inliner]: procedures = 21, calls = 24, calls flagged for inlining = 4, calls inlined = 4, statements flattened = 56 [2023-11-29 00:01:34,384 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-11-29 00:01:34,384 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-11-29 00:01:34,384 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-11-29 00:01:34,385 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-11-29 00:01:34,394 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 12:01:34" (1/1) ... [2023-11-29 00:01:34,394 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 12:01:34" (1/1) ... [2023-11-29 00:01:34,396 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 12:01:34" (1/1) ... [2023-11-29 00:01:34,411 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 00:01:34,411 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 12:01:34" (1/1) ... [2023-11-29 00:01:34,411 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 12:01:34" (1/1) ... [2023-11-29 00:01:34,417 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 12:01:34" (1/1) ... [2023-11-29 00:01:34,421 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 12:01:34" (1/1) ... [2023-11-29 00:01:34,423 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 12:01:34" (1/1) ... [2023-11-29 00:01:34,424 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 12:01:34" (1/1) ... [2023-11-29 00:01:34,427 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-11-29 00:01:34,427 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-11-29 00:01:34,428 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-11-29 00:01:34,428 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-11-29 00:01:34,428 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 12:01:34" (1/1) ... [2023-11-29 00:01:34,435 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2023-11-29 00:01:34,444 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ab7c961-5a72-428b-8a60-70c6308b0128/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 00:01:34,455 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ab7c961-5a72-428b-8a60-70c6308b0128/bin/uautomizer-verify-BQ2R08f2Ya/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (exit command is (exit), workingDir is null) [2023-11-29 00:01:34,469 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ab7c961-5a72-428b-8a60-70c6308b0128/bin/uautomizer-verify-BQ2R08f2Ya/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Waiting until timeout for monitored process [2023-11-29 00:01:34,499 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-11-29 00:01:34,500 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2023-11-29 00:01:34,500 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2023-11-29 00:01:34,500 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2023-11-29 00:01:34,500 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2023-11-29 00:01:34,500 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2023-11-29 00:01:34,501 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#1 [2023-11-29 00:01:34,501 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#2 [2023-11-29 00:01:34,501 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-11-29 00:01:34,501 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#0 [2023-11-29 00:01:34,501 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#1 [2023-11-29 00:01:34,502 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#2 [2023-11-29 00:01:34,502 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2023-11-29 00:01:34,502 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2023-11-29 00:01:34,502 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-11-29 00:01:34,502 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-11-29 00:01:34,503 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#0 [2023-11-29 00:01:34,503 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#1 [2023-11-29 00:01:34,503 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#2 [2023-11-29 00:01:34,503 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-11-29 00:01:34,505 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 00:01:34,606 INFO L241 CfgBuilder]: Building ICFG [2023-11-29 00:01:34,608 INFO L267 CfgBuilder]: Building CFG for each procedure with an implementation [2023-11-29 00:01:34,776 INFO L282 CfgBuilder]: Performing block encoding [2023-11-29 00:01:34,915 INFO L304 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-11-29 00:01:34,915 INFO L309 CfgBuilder]: Removed 2 assume(true) statements. [2023-11-29 00:01:34,915 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 29.11 12:01:34 BoogieIcfgContainer [2023-11-29 00:01:34,915 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-11-29 00:01:34,919 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-11-29 00:01:34,919 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-11-29 00:01:34,922 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-11-29 00:01:34,922 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 29.11 12:01:34" (1/3) ... [2023-11-29 00:01:34,922 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1f43e7d9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 29.11 12:01:34, skipping insertion in model container [2023-11-29 00:01:34,923 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 12:01:34" (2/3) ... [2023-11-29 00:01:34,923 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1f43e7d9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 29.11 12:01:34, skipping insertion in model container [2023-11-29 00:01:34,923 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 29.11 12:01:34" (3/3) ... [2023-11-29 00:01:34,925 INFO L112 eAbstractionObserver]: Analyzing ICFG popl20-more-nonblocking-counter-alt2.wvr.c [2023-11-29 00:01:34,932 WARN L145 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2023-11-29 00:01:34,941 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-11-29 00:01:34,941 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-11-29 00:01:34,941 INFO L514 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-11-29 00:01:34,978 INFO L144 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2023-11-29 00:01:35,006 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 27 places, 22 transitions, 58 flow [2023-11-29 00:01:35,033 INFO L124 PetriNetUnfolderBase]: 2/20 cut-off events. [2023-11-29 00:01:35,033 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2023-11-29 00:01:35,036 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 19 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 00:01:35,036 INFO L82 GeneralOperation]: Start removeDead. Operand has 27 places, 22 transitions, 58 flow [2023-11-29 00:01:35,040 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 24 places, 19 transitions, 50 flow [2023-11-29 00:01:35,051 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-29 00:01:35,057 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;@7fb1c575, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-11-29 00:01:35,057 INFO L358 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2023-11-29 00:01:35,068 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-11-29 00:01:35,068 INFO L124 PetriNetUnfolderBase]: 2/18 cut-off events. [2023-11-29 00:01:35,069 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2023-11-29 00:01:35,069 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 00:01:35,069 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 00:01:35,070 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 00:01:35,075 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 00:01:35,075 INFO L85 PathProgramCache]: Analyzing trace with hash -710098005, now seen corresponding path program 1 times [2023-11-29 00:01:35,082 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 00:01:35,082 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1774050797] [2023-11-29 00:01:35,083 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 00:01:35,083 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 00:01:35,215 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 00:01:35,453 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 00:01:35,453 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 00:01:35,453 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1774050797] [2023-11-29 00:01:35,454 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1774050797] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 00:01:35,454 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-29 00:01:35,454 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-29 00:01:35,455 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1661295754] [2023-11-29 00:01:35,456 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 00:01:35,462 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-29 00:01:35,467 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 00:01:35,488 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-29 00:01:35,488 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-29 00:01:35,493 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 22 [2023-11-29 00:01:35,495 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 24 places, 19 transitions, 50 flow. Second operand has 3 states, 3 states have (on average 9.333333333333334) internal successors, (28), 3 states have internal predecessors, (28), 0 states have call successors, (0), 0 states 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 00:01:35,495 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 00:01:35,495 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 22 [2023-11-29 00:01:35,496 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 00:01:35,589 INFO L124 PetriNetUnfolderBase]: 79/159 cut-off events. [2023-11-29 00:01:35,590 INFO L125 PetriNetUnfolderBase]: For 16/16 co-relation queries the response was YES. [2023-11-29 00:01:35,591 INFO L83 FinitePrefix]: Finished finitePrefix Result has 328 conditions, 159 events. 79/159 cut-off events. For 16/16 co-relation queries the response was YES. Maximal size of possible extension queue 18. Compared 476 event pairs, 24 based on Foata normal form. 1/159 useless extension candidates. Maximal degree in co-relation 255. Up to 80 conditions per place. [2023-11-29 00:01:35,594 INFO L140 encePairwiseOnDemand]: 19/22 looper letters, 21 selfloop transitions, 2 changer transitions 4/30 dead transitions. [2023-11-29 00:01:35,594 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 26 places, 30 transitions, 135 flow [2023-11-29 00:01:35,595 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-29 00:01:35,598 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-29 00:01:35,603 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 43 transitions. [2023-11-29 00:01:35,604 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6515151515151515 [2023-11-29 00:01:35,605 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 43 transitions. [2023-11-29 00:01:35,605 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 43 transitions. [2023-11-29 00:01:35,606 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 00:01:35,608 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 43 transitions. [2023-11-29 00:01:35,609 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 14.333333333333334) internal successors, (43), 3 states have internal predecessors, (43), 0 states have call successors, (0), 0 states 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 00:01:35,612 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 22.0) internal successors, (88), 4 states have internal predecessors, (88), 0 states have call successors, (0), 0 states 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 00:01:35,612 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 22.0) internal successors, (88), 4 states have internal predecessors, (88), 0 states have call successors, (0), 0 states 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 00:01:35,614 INFO L175 Difference]: Start difference. First operand has 24 places, 19 transitions, 50 flow. Second operand 3 states and 43 transitions. [2023-11-29 00:01:35,615 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 26 places, 30 transitions, 135 flow [2023-11-29 00:01:35,617 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 22 places, 30 transitions, 121 flow, removed 0 selfloop flow, removed 4 redundant places. [2023-11-29 00:01:35,618 INFO L231 Difference]: Finished difference. Result has 23 places, 20 transitions, 54 flow [2023-11-29 00:01:35,620 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=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=17, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=54, PETRI_PLACES=23, PETRI_TRANSITIONS=20} [2023-11-29 00:01:35,623 INFO L281 CegarLoopForPetriNet]: 24 programPoint places, -1 predicate places. [2023-11-29 00:01:35,623 INFO L495 AbstractCegarLoop]: Abstraction has has 23 places, 20 transitions, 54 flow [2023-11-29 00:01:35,623 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 9.333333333333334) internal successors, (28), 3 states have internal predecessors, (28), 0 states have call successors, (0), 0 states 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 00:01:35,624 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 00:01:35,624 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 00:01:35,624 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-11-29 00:01:35,624 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 00:01:35,625 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 00:01:35,625 INFO L85 PathProgramCache]: Analyzing trace with hash 319083287, now seen corresponding path program 1 times [2023-11-29 00:01:35,625 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 00:01:35,625 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1282621742] [2023-11-29 00:01:35,625 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 00:01:35,626 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 00:01:35,663 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 00:01:35,779 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 00:01:35,779 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 00:01:35,780 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1282621742] [2023-11-29 00:01:35,780 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1282621742] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 00:01:35,780 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-29 00:01:35,780 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-29 00:01:35,780 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [799962990] [2023-11-29 00:01:35,781 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 00:01:35,782 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-29 00:01:35,782 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 00:01:35,783 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-29 00:01:35,783 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-11-29 00:01:35,791 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 22 [2023-11-29 00:01:35,791 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 23 places, 20 transitions, 54 flow. Second operand has 4 states, 4 states have (on average 7.75) internal successors, (31), 4 states have internal predecessors, (31), 0 states have call successors, (0), 0 states 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 00:01:35,791 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 00:01:35,791 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 22 [2023-11-29 00:01:35,791 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 00:01:35,892 INFO L124 PetriNetUnfolderBase]: 153/282 cut-off events. [2023-11-29 00:01:35,892 INFO L125 PetriNetUnfolderBase]: For 10/10 co-relation queries the response was YES. [2023-11-29 00:01:35,894 INFO L83 FinitePrefix]: Finished finitePrefix Result has 579 conditions, 282 events. 153/282 cut-off events. For 10/10 co-relation queries the response was YES. Maximal size of possible extension queue 22. Compared 962 event pairs, 87 based on Foata normal form. 0/235 useless extension candidates. Maximal degree in co-relation 301. Up to 195 conditions per place. [2023-11-29 00:01:35,896 INFO L140 encePairwiseOnDemand]: 18/22 looper letters, 23 selfloop transitions, 3 changer transitions 0/29 dead transitions. [2023-11-29 00:01:35,896 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 26 places, 29 transitions, 125 flow [2023-11-29 00:01:35,897 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-29 00:01:35,897 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-11-29 00:01:35,898 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 43 transitions. [2023-11-29 00:01:35,898 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.48863636363636365 [2023-11-29 00:01:35,898 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 43 transitions. [2023-11-29 00:01:35,898 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 43 transitions. [2023-11-29 00:01:35,899 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 00:01:35,899 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 43 transitions. [2023-11-29 00:01:35,900 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 10.75) internal successors, (43), 4 states have internal predecessors, (43), 0 states have call successors, (0), 0 states 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 00:01:35,901 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 00:01:35,901 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 00:01:35,901 INFO L175 Difference]: Start difference. First operand has 23 places, 20 transitions, 54 flow. Second operand 4 states and 43 transitions. [2023-11-29 00:01:35,901 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 26 places, 29 transitions, 125 flow [2023-11-29 00:01:35,902 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 25 places, 29 transitions, 123 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-11-29 00:01:35,903 INFO L231 Difference]: Finished difference. Result has 26 places, 21 transitions, 66 flow [2023-11-29 00:01:35,904 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 00:01:35,905 INFO L281 CegarLoopForPetriNet]: 24 programPoint places, 2 predicate places. [2023-11-29 00:01:35,905 INFO L495 AbstractCegarLoop]: Abstraction has has 26 places, 21 transitions, 66 flow [2023-11-29 00:01:35,905 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 7.75) internal successors, (31), 4 states have internal predecessors, (31), 0 states have call successors, (0), 0 states 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 00:01:35,905 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 00:01:35,905 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 00:01:35,906 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-11-29 00:01:35,906 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 00:01:35,906 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 00:01:35,907 INFO L85 PathProgramCache]: Analyzing trace with hash -669572851, now seen corresponding path program 1 times [2023-11-29 00:01:35,907 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 00:01:35,907 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [27436162] [2023-11-29 00:01:35,907 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 00:01:35,908 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 00:01:35,936 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 00:01:36,275 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 00:01:36,275 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 00:01:36,275 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [27436162] [2023-11-29 00:01:36,276 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [27436162] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 00:01:36,276 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [558214224] [2023-11-29 00:01:36,276 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 00:01:36,276 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 00:01:36,276 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ab7c961-5a72-428b-8a60-70c6308b0128/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 00:01:36,280 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ab7c961-5a72-428b-8a60-70c6308b0128/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 00:01:36,289 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ab7c961-5a72-428b-8a60-70c6308b0128/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-11-29 00:01:36,366 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 00:01:36,368 INFO L262 TraceCheckSpWp]: Trace formula consists of 121 conjuncts, 12 conjunts are in the unsatisfiable core [2023-11-29 00:01:36,374 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 00:01:36,601 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 00:01:36,601 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 00:01:37,005 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 00:01:37,005 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [558214224] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 00:01:37,005 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 00:01:37,005 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7, 7] total 15 [2023-11-29 00:01:37,006 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2005551770] [2023-11-29 00:01:37,006 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 00:01:37,006 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2023-11-29 00:01:37,007 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 00:01:37,008 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2023-11-29 00:01:37,008 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=160, Unknown=0, NotChecked=0, Total=240 [2023-11-29 00:01:37,032 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 22 [2023-11-29 00:01:37,033 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 26 places, 21 transitions, 66 flow. Second operand has 16 states, 16 states have (on average 5.9375) internal successors, (95), 16 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 00:01:37,033 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 00:01:37,033 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 22 [2023-11-29 00:01:37,033 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 00:01:37,883 INFO L124 PetriNetUnfolderBase]: 619/1075 cut-off events. [2023-11-29 00:01:37,883 INFO L125 PetriNetUnfolderBase]: For 254/254 co-relation queries the response was YES. [2023-11-29 00:01:37,887 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2623 conditions, 1075 events. 619/1075 cut-off events. For 254/254 co-relation queries the response was YES. Maximal size of possible extension queue 57. Compared 4668 event pairs, 32 based on Foata normal form. 2/997 useless extension candidates. Maximal degree in co-relation 879. Up to 269 conditions per place. [2023-11-29 00:01:37,894 INFO L140 encePairwiseOnDemand]: 13/22 looper letters, 124 selfloop transitions, 42 changer transitions 17/184 dead transitions. [2023-11-29 00:01:37,894 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 44 places, 184 transitions, 891 flow [2023-11-29 00:01:37,894 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2023-11-29 00:01:37,894 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19 states. [2023-11-29 00:01:37,897 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 238 transitions. [2023-11-29 00:01:37,898 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.569377990430622 [2023-11-29 00:01:37,899 INFO L72 ComplementDD]: Start complementDD. Operand 19 states and 238 transitions. [2023-11-29 00:01:37,899 INFO L73 IsDeterministic]: Start isDeterministic. Operand 19 states and 238 transitions. [2023-11-29 00:01:37,900 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 00:01:37,900 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 19 states and 238 transitions. [2023-11-29 00:01:37,903 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 20 states, 19 states have (on average 12.526315789473685) internal successors, (238), 19 states have internal predecessors, (238), 0 states have call successors, (0), 0 states 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 00:01:37,905 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 00:01:37,906 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 00:01:37,906 INFO L175 Difference]: Start difference. First operand has 26 places, 21 transitions, 66 flow. Second operand 19 states and 238 transitions. [2023-11-29 00:01:37,906 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 44 places, 184 transitions, 891 flow [2023-11-29 00:01:37,909 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 42 places, 184 transitions, 867 flow, removed 5 selfloop flow, removed 2 redundant places. [2023-11-29 00:01:37,913 INFO L231 Difference]: Finished difference. Result has 53 places, 66 transitions, 414 flow [2023-11-29 00:01:37,913 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=22, PETRI_DIFFERENCE_MINUEND_FLOW=60, PETRI_DIFFERENCE_MINUEND_PLACES=24, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=21, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=12, PETRI_DIFFERENCE_SUBTRAHEND_STATES=19, PETRI_FLOW=414, PETRI_PLACES=53, PETRI_TRANSITIONS=66} [2023-11-29 00:01:37,914 INFO L281 CegarLoopForPetriNet]: 24 programPoint places, 29 predicate places. [2023-11-29 00:01:37,914 INFO L495 AbstractCegarLoop]: Abstraction has has 53 places, 66 transitions, 414 flow [2023-11-29 00:01:37,915 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 5.9375) internal successors, (95), 16 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 00:01:37,915 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 00:01:37,915 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 00:01:37,921 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ab7c961-5a72-428b-8a60-70c6308b0128/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-11-29 00:01:38,120 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ab7c961-5a72-428b-8a60-70c6308b0128/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 00:01:38,121 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 00:01:38,121 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 00:01:38,121 INFO L85 PathProgramCache]: Analyzing trace with hash -427054555, now seen corresponding path program 2 times [2023-11-29 00:01:38,121 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 00:01:38,122 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [176977688] [2023-11-29 00:01:38,122 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 00:01:38,122 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 00:01:38,146 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 00:01:38,281 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 00:01:38,281 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 00:01:38,282 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [176977688] [2023-11-29 00:01:38,282 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [176977688] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 00:01:38,282 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [57492172] [2023-11-29 00:01:38,282 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-29 00:01:38,282 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 00:01:38,283 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ab7c961-5a72-428b-8a60-70c6308b0128/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 00:01:38,284 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ab7c961-5a72-428b-8a60-70c6308b0128/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 00:01:38,288 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ab7c961-5a72-428b-8a60-70c6308b0128/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-11-29 00:01:38,361 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-11-29 00:01:38,361 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-29 00:01:38,362 INFO L262 TraceCheckSpWp]: Trace formula consists of 121 conjuncts, 10 conjunts are in the unsatisfiable core [2023-11-29 00:01:38,364 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 00:01:38,447 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 00:01:38,447 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 00:01:38,677 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 00:01:38,677 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [57492172] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 00:01:38,677 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 00:01:38,677 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 5, 6] total 10 [2023-11-29 00:01:38,678 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1306522488] [2023-11-29 00:01:38,678 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 00:01:38,678 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2023-11-29 00:01:38,679 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 00:01:38,679 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2023-11-29 00:01:38,679 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=73, Unknown=0, NotChecked=0, Total=110 [2023-11-29 00:01:38,685 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 22 [2023-11-29 00:01:38,686 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 53 places, 66 transitions, 414 flow. Second operand has 11 states, 11 states have (on average 5.818181818181818) internal successors, (64), 11 states have internal predecessors, (64), 0 states have call successors, (0), 0 states 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 00:01:38,686 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 00:01:38,686 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 22 [2023-11-29 00:01:38,686 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 00:01:38,972 INFO L124 PetriNetUnfolderBase]: 684/1194 cut-off events. [2023-11-29 00:01:38,972 INFO L125 PetriNetUnfolderBase]: For 2351/2351 co-relation queries the response was YES. [2023-11-29 00:01:38,976 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4153 conditions, 1194 events. 684/1194 cut-off events. For 2351/2351 co-relation queries the response was YES. Maximal size of possible extension queue 59. Compared 5325 event pairs, 104 based on Foata normal form. 26/1220 useless extension candidates. Maximal degree in co-relation 3891. Up to 615 conditions per place. [2023-11-29 00:01:38,981 INFO L140 encePairwiseOnDemand]: 15/22 looper letters, 72 selfloop transitions, 33 changer transitions 0/106 dead transitions. [2023-11-29 00:01:38,981 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 60 places, 106 transitions, 815 flow [2023-11-29 00:01:38,982 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-11-29 00:01:38,982 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2023-11-29 00:01:38,982 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 80 transitions. [2023-11-29 00:01:38,983 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45454545454545453 [2023-11-29 00:01:38,983 INFO L72 ComplementDD]: Start complementDD. Operand 8 states and 80 transitions. [2023-11-29 00:01:38,983 INFO L73 IsDeterministic]: Start isDeterministic. Operand 8 states and 80 transitions. [2023-11-29 00:01:38,983 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 00:01:38,983 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 8 states and 80 transitions. [2023-11-29 00:01:38,984 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 9 states, 8 states have (on average 10.0) internal successors, (80), 8 states have internal predecessors, (80), 0 states have call successors, (0), 0 states 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 00:01:38,985 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 9 states, 9 states have (on average 22.0) internal successors, (198), 9 states have internal predecessors, (198), 0 states have call successors, (0), 0 states 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 00:01:38,985 INFO L81 ComplementDD]: Finished complementDD. Result has 9 states, 9 states have (on average 22.0) internal successors, (198), 9 states have internal predecessors, (198), 0 states have call successors, (0), 0 states 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 00:01:38,985 INFO L175 Difference]: Start difference. First operand has 53 places, 66 transitions, 414 flow. Second operand 8 states and 80 transitions. [2023-11-29 00:01:38,986 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 60 places, 106 transitions, 815 flow [2023-11-29 00:01:39,003 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 59 places, 106 transitions, 750 flow, removed 31 selfloop flow, removed 1 redundant places. [2023-11-29 00:01:39,005 INFO L231 Difference]: Finished difference. Result has 63 places, 72 transitions, 532 flow [2023-11-29 00:01:39,005 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=22, PETRI_DIFFERENCE_MINUEND_FLOW=371, PETRI_DIFFERENCE_MINUEND_PLACES=52, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=66, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=27, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=37, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=532, PETRI_PLACES=63, PETRI_TRANSITIONS=72} [2023-11-29 00:01:39,006 INFO L281 CegarLoopForPetriNet]: 24 programPoint places, 39 predicate places. [2023-11-29 00:01:39,006 INFO L495 AbstractCegarLoop]: Abstraction has has 63 places, 72 transitions, 532 flow [2023-11-29 00:01:39,006 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 5.818181818181818) internal successors, (64), 11 states have internal predecessors, (64), 0 states have call successors, (0), 0 states 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 00:01:39,007 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 00:01:39,007 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 00:01:39,012 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ab7c961-5a72-428b-8a60-70c6308b0128/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2023-11-29 00:01:39,207 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ab7c961-5a72-428b-8a60-70c6308b0128/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 00:01:39,208 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 00:01:39,208 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 00:01:39,208 INFO L85 PathProgramCache]: Analyzing trace with hash 174217317, now seen corresponding path program 3 times [2023-11-29 00:01:39,208 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 00:01:39,208 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1009602771] [2023-11-29 00:01:39,208 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 00:01:39,208 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 00:01:39,231 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 00:01:39,428 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 00:01:39,429 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 00:01:39,429 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1009602771] [2023-11-29 00:01:39,429 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1009602771] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 00:01:39,429 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2112557309] [2023-11-29 00:01:39,429 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-11-29 00:01:39,429 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 00:01:39,429 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ab7c961-5a72-428b-8a60-70c6308b0128/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 00:01:39,431 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ab7c961-5a72-428b-8a60-70c6308b0128/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 00:01:39,436 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ab7c961-5a72-428b-8a60-70c6308b0128/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-11-29 00:01:39,513 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2023-11-29 00:01:39,513 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-29 00:01:39,514 INFO L262 TraceCheckSpWp]: Trace formula consists of 126 conjuncts, 10 conjunts are in the unsatisfiable core [2023-11-29 00:01:39,516 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 00:01:39,645 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 00:01:39,645 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 00:01:39,823 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 5 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 00:01:39,823 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2112557309] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 00:01:39,824 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 00:01:39,824 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 8, 7] total 16 [2023-11-29 00:01:39,824 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1324350860] [2023-11-29 00:01:39,824 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 00:01:39,824 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2023-11-29 00:01:39,825 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 00:01:39,825 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2023-11-29 00:01:39,826 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=171, Unknown=0, NotChecked=0, Total=240 [2023-11-29 00:01:39,838 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 22 [2023-11-29 00:01:39,838 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 63 places, 72 transitions, 532 flow. Second operand has 16 states, 16 states have (on average 6.125) internal successors, (98), 16 states have internal predecessors, (98), 0 states have call successors, (0), 0 states 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 00:01:39,838 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 00:01:39,838 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 22 [2023-11-29 00:01:39,838 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 00:01:40,717 INFO L124 PetriNetUnfolderBase]: 1115/1958 cut-off events. [2023-11-29 00:01:40,718 INFO L125 PetriNetUnfolderBase]: For 6629/6631 co-relation queries the response was YES. [2023-11-29 00:01:40,721 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7396 conditions, 1958 events. 1115/1958 cut-off events. For 6629/6631 co-relation queries the response was YES. Maximal size of possible extension queue 97. Compared 10165 event pairs, 22 based on Foata normal form. 30/1988 useless extension candidates. Maximal degree in co-relation 7076. Up to 408 conditions per place. [2023-11-29 00:01:40,732 INFO L140 encePairwiseOnDemand]: 14/22 looper letters, 102 selfloop transitions, 135 changer transitions 22/277 dead transitions. [2023-11-29 00:01:40,732 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 82 places, 277 transitions, 2528 flow [2023-11-29 00:01:40,732 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2023-11-29 00:01:40,733 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2023-11-29 00:01:40,734 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 216 transitions. [2023-11-29 00:01:40,734 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4909090909090909 [2023-11-29 00:01:40,734 INFO L72 ComplementDD]: Start complementDD. Operand 20 states and 216 transitions. [2023-11-29 00:01:40,735 INFO L73 IsDeterministic]: Start isDeterministic. Operand 20 states and 216 transitions. [2023-11-29 00:01:40,735 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 00:01:40,735 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 20 states and 216 transitions. [2023-11-29 00:01:40,736 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 21 states, 20 states have (on average 10.8) internal successors, (216), 20 states have internal predecessors, (216), 0 states have call successors, (0), 0 states 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 00:01:40,739 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 21 states, 21 states have (on average 22.0) internal successors, (462), 21 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 00:01:40,739 INFO L81 ComplementDD]: Finished complementDD. Result has 21 states, 21 states have (on average 22.0) internal successors, (462), 21 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 00:01:40,739 INFO L175 Difference]: Start difference. First operand has 63 places, 72 transitions, 532 flow. Second operand 20 states and 216 transitions. [2023-11-29 00:01:40,739 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 82 places, 277 transitions, 2528 flow [2023-11-29 00:01:40,757 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 79 places, 277 transitions, 2508 flow, removed 4 selfloop flow, removed 3 redundant places. [2023-11-29 00:01:40,761 INFO L231 Difference]: Finished difference. Result has 92 places, 179 transitions, 1950 flow [2023-11-29 00:01:40,761 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=22, PETRI_DIFFERENCE_MINUEND_FLOW=521, PETRI_DIFFERENCE_MINUEND_PLACES=60, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=72, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=33, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=31, PETRI_DIFFERENCE_SUBTRAHEND_STATES=20, PETRI_FLOW=1950, PETRI_PLACES=92, PETRI_TRANSITIONS=179} [2023-11-29 00:01:40,762 INFO L281 CegarLoopForPetriNet]: 24 programPoint places, 68 predicate places. [2023-11-29 00:01:40,762 INFO L495 AbstractCegarLoop]: Abstraction has has 92 places, 179 transitions, 1950 flow [2023-11-29 00:01:40,763 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 6.125) internal successors, (98), 16 states have internal predecessors, (98), 0 states have call successors, (0), 0 states 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 00:01:40,763 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 00:01:40,763 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 00:01:40,767 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ab7c961-5a72-428b-8a60-70c6308b0128/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2023-11-29 00:01:40,963 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ab7c961-5a72-428b-8a60-70c6308b0128/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 00:01:40,964 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 00:01:40,964 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 00:01:40,964 INFO L85 PathProgramCache]: Analyzing trace with hash -167213339, now seen corresponding path program 4 times [2023-11-29 00:01:40,964 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 00:01:40,965 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [28150421] [2023-11-29 00:01:40,965 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 00:01:40,965 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 00:01:40,984 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 00:01:41,200 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 00:01:41,200 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 00:01:41,201 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [28150421] [2023-11-29 00:01:41,201 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [28150421] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 00:01:41,201 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [118087226] [2023-11-29 00:01:41,201 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-11-29 00:01:41,201 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 00:01:41,201 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ab7c961-5a72-428b-8a60-70c6308b0128/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 00:01:41,202 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ab7c961-5a72-428b-8a60-70c6308b0128/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 00:01:41,205 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ab7c961-5a72-428b-8a60-70c6308b0128/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-11-29 00:01:41,279 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-11-29 00:01:41,279 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-29 00:01:41,280 INFO L262 TraceCheckSpWp]: Trace formula consists of 126 conjuncts, 10 conjunts are in the unsatisfiable core [2023-11-29 00:01:41,282 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 00:01:41,420 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 00:01:41,420 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 00:01:41,735 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 5 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 00:01:41,735 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [118087226] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 00:01:41,735 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 00:01:41,735 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 8, 7] total 16 [2023-11-29 00:01:41,736 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [709369650] [2023-11-29 00:01:41,736 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 00:01:41,737 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2023-11-29 00:01:41,737 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 00:01:41,738 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2023-11-29 00:01:41,738 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=168, Unknown=0, NotChecked=0, Total=240 [2023-11-29 00:01:41,744 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 22 [2023-11-29 00:01:41,745 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 92 places, 179 transitions, 1950 flow. Second operand has 16 states, 16 states have (on average 6.3125) internal successors, (101), 16 states have internal predecessors, (101), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 00:01:41,745 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 00:01:41,745 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 22 [2023-11-29 00:01:41,745 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 00:01:42,780 INFO L124 PetriNetUnfolderBase]: 1531/2666 cut-off events. [2023-11-29 00:01:42,780 INFO L125 PetriNetUnfolderBase]: For 20544/20556 co-relation queries the response was YES. [2023-11-29 00:01:42,791 INFO L83 FinitePrefix]: Finished finitePrefix Result has 13865 conditions, 2666 events. 1531/2666 cut-off events. For 20544/20556 co-relation queries the response was YES. Maximal size of possible extension queue 138. Compared 14731 event pairs, 139 based on Foata normal form. 12/2672 useless extension candidates. Maximal degree in co-relation 12568. Up to 871 conditions per place. [2023-11-29 00:01:42,816 INFO L140 encePairwiseOnDemand]: 13/22 looper letters, 163 selfloop transitions, 242 changer transitions 6/429 dead transitions. [2023-11-29 00:01:42,817 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 109 places, 429 transitions, 5560 flow [2023-11-29 00:01:42,817 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2023-11-29 00:01:42,817 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2023-11-29 00:01:42,818 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 168 transitions. [2023-11-29 00:01:42,819 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42424242424242425 [2023-11-29 00:01:42,819 INFO L72 ComplementDD]: Start complementDD. Operand 18 states and 168 transitions. [2023-11-29 00:01:42,819 INFO L73 IsDeterministic]: Start isDeterministic. Operand 18 states and 168 transitions. [2023-11-29 00:01:42,819 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 00:01:42,819 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 18 states and 168 transitions. [2023-11-29 00:01:42,820 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 19 states, 18 states have (on average 9.333333333333334) internal successors, (168), 18 states have internal predecessors, (168), 0 states have call successors, (0), 0 states 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 00:01:42,821 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 19 states, 19 states have (on average 22.0) internal successors, (418), 19 states have internal predecessors, (418), 0 states have call successors, (0), 0 states 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 00:01:42,822 INFO L81 ComplementDD]: Finished complementDD. Result has 19 states, 19 states have (on average 22.0) internal successors, (418), 19 states have internal predecessors, (418), 0 states have call successors, (0), 0 states 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 00:01:42,822 INFO L175 Difference]: Start difference. First operand has 92 places, 179 transitions, 1950 flow. Second operand 18 states and 168 transitions. [2023-11-29 00:01:42,822 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 109 places, 429 transitions, 5560 flow [2023-11-29 00:01:42,900 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 108 places, 429 transitions, 5361 flow, removed 94 selfloop flow, removed 1 redundant places. [2023-11-29 00:01:42,910 INFO L231 Difference]: Finished difference. Result has 118 places, 341 transitions, 4807 flow [2023-11-29 00:01:42,911 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=22, PETRI_DIFFERENCE_MINUEND_FLOW=1865, PETRI_DIFFERENCE_MINUEND_PLACES=91, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=179, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=91, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=36, PETRI_DIFFERENCE_SUBTRAHEND_STATES=18, PETRI_FLOW=4807, PETRI_PLACES=118, PETRI_TRANSITIONS=341} [2023-11-29 00:01:42,911 INFO L281 CegarLoopForPetriNet]: 24 programPoint places, 94 predicate places. [2023-11-29 00:01:42,912 INFO L495 AbstractCegarLoop]: Abstraction has has 118 places, 341 transitions, 4807 flow [2023-11-29 00:01:42,912 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 6.3125) internal successors, (101), 16 states have internal predecessors, (101), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 00:01:42,912 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 00:01:42,912 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 00:01:42,918 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ab7c961-5a72-428b-8a60-70c6308b0128/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2023-11-29 00:01:43,116 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ab7c961-5a72-428b-8a60-70c6308b0128/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 00:01:43,116 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 00:01:43,117 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 00:01:43,117 INFO L85 PathProgramCache]: Analyzing trace with hash 920301583, now seen corresponding path program 5 times [2023-11-29 00:01:43,117 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 00:01:43,117 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [606381470] [2023-11-29 00:01:43,117 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 00:01:43,117 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 00:01:43,139 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 00:01:43,372 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 00:01:43,373 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 00:01:43,373 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [606381470] [2023-11-29 00:01:43,373 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [606381470] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 00:01:43,373 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [747984283] [2023-11-29 00:01:43,374 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-11-29 00:01:43,374 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 00:01:43,374 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ab7c961-5a72-428b-8a60-70c6308b0128/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 00:01:43,375 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ab7c961-5a72-428b-8a60-70c6308b0128/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 00:01:43,388 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ab7c961-5a72-428b-8a60-70c6308b0128/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-11-29 00:01:43,454 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2023-11-29 00:01:43,454 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-29 00:01:43,455 INFO L262 TraceCheckSpWp]: Trace formula consists of 126 conjuncts, 10 conjunts are in the unsatisfiable core [2023-11-29 00:01:43,457 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 00:01:43,647 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 00:01:43,647 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 00:01:43,837 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 00:01:43,837 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [747984283] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 00:01:43,838 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 00:01:43,838 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7, 8] total 17 [2023-11-29 00:01:43,838 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1295627564] [2023-11-29 00:01:43,838 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 00:01:43,839 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2023-11-29 00:01:43,839 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 00:01:43,839 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2023-11-29 00:01:43,840 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=216, Unknown=0, NotChecked=0, Total=272 [2023-11-29 00:01:43,863 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 22 [2023-11-29 00:01:43,864 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 118 places, 341 transitions, 4807 flow. Second operand has 17 states, 17 states have (on average 5.9411764705882355) internal successors, (101), 17 states have internal predecessors, (101), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 00:01:43,864 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 00:01:43,864 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 22 [2023-11-29 00:01:43,864 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 00:01:45,803 INFO L124 PetriNetUnfolderBase]: 2341/3952 cut-off events. [2023-11-29 00:01:45,804 INFO L125 PetriNetUnfolderBase]: For 45204/45204 co-relation queries the response was YES. [2023-11-29 00:01:45,816 INFO L83 FinitePrefix]: Finished finitePrefix Result has 24509 conditions, 3952 events. 2341/3952 cut-off events. For 45204/45204 co-relation queries the response was YES. Maximal size of possible extension queue 198. Compared 22784 event pairs, 50 based on Foata normal form. 64/4016 useless extension candidates. Maximal degree in co-relation 24113. Up to 965 conditions per place. [2023-11-29 00:01:45,845 INFO L140 encePairwiseOnDemand]: 12/22 looper letters, 258 selfloop transitions, 503 changer transitions 1/763 dead transitions. [2023-11-29 00:01:45,846 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 152 places, 763 transitions, 11618 flow [2023-11-29 00:01:45,846 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2023-11-29 00:01:45,846 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 37 states. [2023-11-29 00:01:45,848 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 340 transitions. [2023-11-29 00:01:45,849 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4176904176904177 [2023-11-29 00:01:45,849 INFO L72 ComplementDD]: Start complementDD. Operand 37 states and 340 transitions. [2023-11-29 00:01:45,849 INFO L73 IsDeterministic]: Start isDeterministic. Operand 37 states and 340 transitions. [2023-11-29 00:01:45,849 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 00:01:45,850 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 37 states and 340 transitions. [2023-11-29 00:01:45,851 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 38 states, 37 states have (on average 9.18918918918919) internal successors, (340), 37 states have internal predecessors, (340), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 00:01:45,852 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 00:01:45,853 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 00:01:45,853 INFO L175 Difference]: Start difference. First operand has 118 places, 341 transitions, 4807 flow. Second operand 37 states and 340 transitions. [2023-11-29 00:01:45,853 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 152 places, 763 transitions, 11618 flow [2023-11-29 00:01:46,040 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 150 places, 763 transitions, 11405 flow, removed 106 selfloop flow, removed 2 redundant places. [2023-11-29 00:01:46,056 INFO L231 Difference]: Finished difference. Result has 177 places, 652 transitions, 11117 flow [2023-11-29 00:01:46,056 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=22, PETRI_DIFFERENCE_MINUEND_FLOW=4754, PETRI_DIFFERENCE_MINUEND_PLACES=114, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=341, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=223, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=80, PETRI_DIFFERENCE_SUBTRAHEND_STATES=37, PETRI_FLOW=11117, PETRI_PLACES=177, PETRI_TRANSITIONS=652} [2023-11-29 00:01:46,057 INFO L281 CegarLoopForPetriNet]: 24 programPoint places, 153 predicate places. [2023-11-29 00:01:46,057 INFO L495 AbstractCegarLoop]: Abstraction has has 177 places, 652 transitions, 11117 flow [2023-11-29 00:01:46,057 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 5.9411764705882355) internal successors, (101), 17 states have internal predecessors, (101), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 00:01:46,058 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 00:01:46,058 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 00:01:46,062 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ab7c961-5a72-428b-8a60-70c6308b0128/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2023-11-29 00:01:46,258 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ab7c961-5a72-428b-8a60-70c6308b0128/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 00:01:46,259 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 00:01:46,259 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 00:01:46,259 INFO L85 PathProgramCache]: Analyzing trace with hash -43415537, now seen corresponding path program 6 times [2023-11-29 00:01:46,259 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 00:01:46,259 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [376413129] [2023-11-29 00:01:46,259 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 00:01:46,260 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 00:01:46,280 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 00:01:46,560 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 00:01:46,560 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 00:01:46,560 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [376413129] [2023-11-29 00:01:46,560 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [376413129] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 00:01:46,561 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1250085986] [2023-11-29 00:01:46,561 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-11-29 00:01:46,561 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 00:01:46,561 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ab7c961-5a72-428b-8a60-70c6308b0128/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 00:01:46,562 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ab7c961-5a72-428b-8a60-70c6308b0128/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 00:01:46,563 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ab7c961-5a72-428b-8a60-70c6308b0128/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2023-11-29 00:01:46,641 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2023-11-29 00:01:46,641 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-29 00:01:46,642 INFO L262 TraceCheckSpWp]: Trace formula consists of 126 conjuncts, 10 conjunts are in the unsatisfiable core [2023-11-29 00:01:46,644 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 00:01:46,776 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 00:01:46,776 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 00:01:47,001 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 3 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 00:01:47,001 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1250085986] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 00:01:47,002 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 00:01:47,002 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 7] total 18 [2023-11-29 00:01:47,002 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [486473905] [2023-11-29 00:01:47,002 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 00:01:47,003 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2023-11-29 00:01:47,003 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 00:01:47,004 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2023-11-29 00:01:47,004 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=225, Unknown=0, NotChecked=0, Total=306 [2023-11-29 00:01:47,005 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 22 [2023-11-29 00:01:47,006 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 177 places, 652 transitions, 11117 flow. Second operand has 18 states, 18 states have (on average 6.0) internal successors, (108), 18 states have internal predecessors, (108), 0 states have call successors, (0), 0 states 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 00:01:47,006 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 00:01:47,006 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 22 [2023-11-29 00:01:47,006 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 00:01:49,922 INFO L124 PetriNetUnfolderBase]: 3164/5529 cut-off events. [2023-11-29 00:01:49,923 INFO L125 PetriNetUnfolderBase]: For 110291/110295 co-relation queries the response was YES. [2023-11-29 00:01:49,944 INFO L83 FinitePrefix]: Finished finitePrefix Result has 41872 conditions, 5529 events. 3164/5529 cut-off events. For 110291/110295 co-relation queries the response was YES. Maximal size of possible extension queue 279. Compared 35397 event pairs, 92 based on Foata normal form. 48/5575 useless extension candidates. Maximal degree in co-relation 41379. Up to 1451 conditions per place. [2023-11-29 00:01:49,974 INFO L140 encePairwiseOnDemand]: 14/22 looper letters, 263 selfloop transitions, 826 changer transitions 2/1123 dead transitions. [2023-11-29 00:01:49,974 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 222 places, 1123 transitions, 20449 flow [2023-11-29 00:01:49,974 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2023-11-29 00:01:49,975 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 46 states. [2023-11-29 00:01:49,977 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 446 transitions. [2023-11-29 00:01:49,977 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4407114624505929 [2023-11-29 00:01:49,977 INFO L72 ComplementDD]: Start complementDD. Operand 46 states and 446 transitions. [2023-11-29 00:01:49,977 INFO L73 IsDeterministic]: Start isDeterministic. Operand 46 states and 446 transitions. [2023-11-29 00:01:49,978 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 00:01:49,978 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 46 states and 446 transitions. [2023-11-29 00:01:49,980 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 47 states, 46 states have (on average 9.695652173913043) internal successors, (446), 46 states have internal predecessors, (446), 0 states have call successors, (0), 0 states 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 00:01:49,982 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 47 states, 47 states have (on average 22.0) internal successors, (1034), 47 states have internal predecessors, (1034), 0 states have call successors, (0), 0 states 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 00:01:49,983 INFO L81 ComplementDD]: Finished complementDD. Result has 47 states, 47 states have (on average 22.0) internal successors, (1034), 47 states have internal predecessors, (1034), 0 states have call successors, (0), 0 states 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 00:01:49,983 INFO L175 Difference]: Start difference. First operand has 177 places, 652 transitions, 11117 flow. Second operand 46 states and 446 transitions. [2023-11-29 00:01:49,983 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 222 places, 1123 transitions, 20449 flow [2023-11-29 00:01:50,602 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 216 places, 1123 transitions, 18795 flow, removed 735 selfloop flow, removed 6 redundant places. [2023-11-29 00:01:50,621 INFO L231 Difference]: Finished difference. Result has 238 places, 999 transitions, 18818 flow [2023-11-29 00:01:50,622 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=22, PETRI_DIFFERENCE_MINUEND_FLOW=10275, PETRI_DIFFERENCE_MINUEND_PLACES=171, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=652, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=508, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=81, PETRI_DIFFERENCE_SUBTRAHEND_STATES=46, PETRI_FLOW=18818, PETRI_PLACES=238, PETRI_TRANSITIONS=999} [2023-11-29 00:01:50,623 INFO L281 CegarLoopForPetriNet]: 24 programPoint places, 214 predicate places. [2023-11-29 00:01:50,623 INFO L495 AbstractCegarLoop]: Abstraction has has 238 places, 999 transitions, 18818 flow [2023-11-29 00:01:50,623 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 6.0) internal successors, (108), 18 states have internal predecessors, (108), 0 states have call successors, (0), 0 states 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 00:01:50,623 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 00:01:50,623 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 00:01:50,627 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ab7c961-5a72-428b-8a60-70c6308b0128/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2023-11-29 00:01:50,823 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ab7c961-5a72-428b-8a60-70c6308b0128/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 00:01:50,824 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 00:01:50,824 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 00:01:50,824 INFO L85 PathProgramCache]: Analyzing trace with hash -2012909019, now seen corresponding path program 7 times [2023-11-29 00:01:50,824 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 00:01:50,824 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1729526043] [2023-11-29 00:01:50,824 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 00:01:50,824 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 00:01:50,840 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 00:01:51,027 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 00:01:51,027 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 00:01:51,027 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1729526043] [2023-11-29 00:01:51,027 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1729526043] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 00:01:51,027 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1077318619] [2023-11-29 00:01:51,027 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-11-29 00:01:51,028 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 00:01:51,028 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ab7c961-5a72-428b-8a60-70c6308b0128/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 00:01:51,029 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ab7c961-5a72-428b-8a60-70c6308b0128/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 00:01:51,032 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ab7c961-5a72-428b-8a60-70c6308b0128/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2023-11-29 00:01:51,101 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 00:01:51,102 INFO L262 TraceCheckSpWp]: Trace formula consists of 126 conjuncts, 10 conjunts are in the unsatisfiable core [2023-11-29 00:01:51,104 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 00:01:51,219 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 00:01:51,219 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 00:01:51,439 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 5 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 00:01:51,439 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1077318619] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 00:01:51,440 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 00:01:51,440 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 8, 7] total 15 [2023-11-29 00:01:51,440 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1920476562] [2023-11-29 00:01:51,440 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 00:01:51,440 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2023-11-29 00:01:51,441 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 00:01:51,441 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2023-11-29 00:01:51,442 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=149, Unknown=0, NotChecked=0, Total=210 [2023-11-29 00:01:51,446 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 22 [2023-11-29 00:01:51,446 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 238 places, 999 transitions, 18818 flow. Second operand has 15 states, 15 states have (on average 6.4) internal successors, (96), 15 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 00:01:51,446 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 00:01:51,446 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 22 [2023-11-29 00:01:51,447 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 00:01:54,150 INFO L124 PetriNetUnfolderBase]: 3425/5937 cut-off events. [2023-11-29 00:01:54,150 INFO L125 PetriNetUnfolderBase]: For 133340/133356 co-relation queries the response was YES. [2023-11-29 00:01:54,179 INFO L83 FinitePrefix]: Finished finitePrefix Result has 48453 conditions, 5937 events. 3425/5937 cut-off events. For 133340/133356 co-relation queries the response was YES. Maximal size of possible extension queue 286. Compared 38428 event pairs, 183 based on Foata normal form. 18/5951 useless extension candidates. Maximal degree in co-relation 47384. Up to 1543 conditions per place. [2023-11-29 00:01:54,208 INFO L140 encePairwiseOnDemand]: 13/22 looper letters, 357 selfloop transitions, 764 changer transitions 2/1155 dead transitions. [2023-11-29 00:01:54,208 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 256 places, 1155 transitions, 23789 flow [2023-11-29 00:01:54,209 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2023-11-29 00:01:54,209 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2023-11-29 00:01:54,210 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 205 transitions. [2023-11-29 00:01:54,210 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44372294372294374 [2023-11-29 00:01:54,210 INFO L72 ComplementDD]: Start complementDD. Operand 21 states and 205 transitions. [2023-11-29 00:01:54,210 INFO L73 IsDeterministic]: Start isDeterministic. Operand 21 states and 205 transitions. [2023-11-29 00:01:54,210 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 00:01:54,210 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 21 states and 205 transitions. [2023-11-29 00:01:54,211 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 22 states, 21 states have (on average 9.761904761904763) internal successors, (205), 21 states have internal predecessors, (205), 0 states have call successors, (0), 0 states 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 00:01:54,212 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 00:01:54,212 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 00:01:54,212 INFO L175 Difference]: Start difference. First operand has 238 places, 999 transitions, 18818 flow. Second operand 21 states and 205 transitions. [2023-11-29 00:01:54,212 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 256 places, 1155 transitions, 23789 flow [2023-11-29 00:01:55,654 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 253 places, 1155 transitions, 23456 flow, removed 154 selfloop flow, removed 3 redundant places. [2023-11-29 00:01:55,677 INFO L231 Difference]: Finished difference. Result has 266 places, 1098 transitions, 23560 flow [2023-11-29 00:01:55,678 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=22, PETRI_DIFFERENCE_MINUEND_FLOW=18441, PETRI_DIFFERENCE_MINUEND_PLACES=233, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=994, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=660, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=295, PETRI_DIFFERENCE_SUBTRAHEND_STATES=21, PETRI_FLOW=23560, PETRI_PLACES=266, PETRI_TRANSITIONS=1098} [2023-11-29 00:01:55,678 INFO L281 CegarLoopForPetriNet]: 24 programPoint places, 242 predicate places. [2023-11-29 00:01:55,679 INFO L495 AbstractCegarLoop]: Abstraction has has 266 places, 1098 transitions, 23560 flow [2023-11-29 00:01:55,679 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 6.4) internal successors, (96), 15 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 00:01:55,679 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 00:01:55,679 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 00:01:55,684 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ab7c961-5a72-428b-8a60-70c6308b0128/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2023-11-29 00:01:55,879 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ab7c961-5a72-428b-8a60-70c6308b0128/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable8 [2023-11-29 00:01:55,880 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 00:01:55,880 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 00:01:55,880 INFO L85 PathProgramCache]: Analyzing trace with hash 1624932453, now seen corresponding path program 8 times [2023-11-29 00:01:55,880 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 00:01:55,881 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [702372527] [2023-11-29 00:01:55,881 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 00:01:55,881 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 00:01:55,894 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 00:01:56,073 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 00:01:56,074 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 00:01:56,074 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [702372527] [2023-11-29 00:01:56,074 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [702372527] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 00:01:56,074 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [869640114] [2023-11-29 00:01:56,074 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-29 00:01:56,074 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 00:01:56,075 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ab7c961-5a72-428b-8a60-70c6308b0128/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 00:01:56,075 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ab7c961-5a72-428b-8a60-70c6308b0128/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 00:01:56,078 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ab7c961-5a72-428b-8a60-70c6308b0128/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2023-11-29 00:01:56,150 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-11-29 00:01:56,150 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-29 00:01:56,151 INFO L262 TraceCheckSpWp]: Trace formula consists of 126 conjuncts, 10 conjunts are in the unsatisfiable core [2023-11-29 00:01:56,153 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 00:01:56,270 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 00:01:56,270 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 00:01:56,473 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 00:01:56,473 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [869640114] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 00:01:56,474 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 00:01:56,474 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 7] total 17 [2023-11-29 00:01:56,474 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [233304689] [2023-11-29 00:01:56,474 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 00:01:56,474 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2023-11-29 00:01:56,475 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 00:01:56,475 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2023-11-29 00:01:56,475 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=194, Unknown=0, NotChecked=0, Total=272 [2023-11-29 00:01:56,483 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 22 [2023-11-29 00:01:56,483 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 266 places, 1098 transitions, 23560 flow. Second operand has 17 states, 17 states have (on average 6.0588235294117645) internal successors, (103), 17 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 00:01:56,483 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 00:01:56,483 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 22 [2023-11-29 00:01:56,483 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 00:01:59,813 INFO L124 PetriNetUnfolderBase]: 3982/6945 cut-off events. [2023-11-29 00:01:59,813 INFO L125 PetriNetUnfolderBase]: For 214777/214783 co-relation queries the response was YES. [2023-11-29 00:01:59,883 INFO L83 FinitePrefix]: Finished finitePrefix Result has 63266 conditions, 6945 events. 3982/6945 cut-off events. For 214777/214783 co-relation queries the response was YES. Maximal size of possible extension queue 363. Compared 46832 event pairs, 187 based on Foata normal form. 56/7001 useless extension candidates. Maximal degree in co-relation 61977. Up to 1753 conditions per place. [2023-11-29 00:01:59,932 INFO L140 encePairwiseOnDemand]: 14/22 looper letters, 282 selfloop transitions, 1095 changer transitions 2/1411 dead transitions. [2023-11-29 00:01:59,932 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 287 places, 1411 transitions, 32621 flow [2023-11-29 00:01:59,933 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2023-11-29 00:01:59,933 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23 states. [2023-11-29 00:01:59,934 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 236 transitions. [2023-11-29 00:01:59,934 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.466403162055336 [2023-11-29 00:01:59,934 INFO L72 ComplementDD]: Start complementDD. Operand 23 states and 236 transitions. [2023-11-29 00:01:59,934 INFO L73 IsDeterministic]: Start isDeterministic. Operand 23 states and 236 transitions. [2023-11-29 00:01:59,935 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 00:01:59,935 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 23 states and 236 transitions. [2023-11-29 00:01:59,936 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 24 states, 23 states have (on average 10.26086956521739) internal successors, (236), 23 states have internal predecessors, (236), 0 states have call successors, (0), 0 states 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 00:01:59,937 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 00:01:59,937 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 00:01:59,937 INFO L175 Difference]: Start difference. First operand has 266 places, 1098 transitions, 23560 flow. Second operand 23 states and 236 transitions. [2023-11-29 00:01:59,937 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 287 places, 1411 transitions, 32621 flow [2023-11-29 00:02:02,249 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 282 places, 1411 transitions, 32267 flow, removed 163 selfloop flow, removed 5 redundant places. [2023-11-29 00:02:02,279 INFO L231 Difference]: Finished difference. Result has 294 places, 1326 transitions, 32968 flow [2023-11-29 00:02:02,280 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=22, PETRI_DIFFERENCE_MINUEND_FLOW=23303, PETRI_DIFFERENCE_MINUEND_PLACES=260, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1097, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=883, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=155, PETRI_DIFFERENCE_SUBTRAHEND_STATES=23, PETRI_FLOW=32968, PETRI_PLACES=294, PETRI_TRANSITIONS=1326} [2023-11-29 00:02:02,281 INFO L281 CegarLoopForPetriNet]: 24 programPoint places, 270 predicate places. [2023-11-29 00:02:02,281 INFO L495 AbstractCegarLoop]: Abstraction has has 294 places, 1326 transitions, 32968 flow [2023-11-29 00:02:02,281 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 6.0588235294117645) internal successors, (103), 17 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 00:02:02,282 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 00:02:02,282 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 00:02:02,287 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ab7c961-5a72-428b-8a60-70c6308b0128/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Ended with exit code 0 [2023-11-29 00:02:02,482 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ab7c961-5a72-428b-8a60-70c6308b0128/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 00:02:02,482 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 00:02:02,483 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 00:02:02,483 INFO L85 PathProgramCache]: Analyzing trace with hash -1413551357, now seen corresponding path program 9 times [2023-11-29 00:02:02,483 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 00:02:02,483 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2126321471] [2023-11-29 00:02:02,483 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 00:02:02,483 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 00:02:02,498 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 00:02:02,668 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 00:02:02,668 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 00:02:02,668 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2126321471] [2023-11-29 00:02:02,669 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2126321471] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 00:02:02,669 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [795078998] [2023-11-29 00:02:02,669 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-11-29 00:02:02,669 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 00:02:02,669 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ab7c961-5a72-428b-8a60-70c6308b0128/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 00:02:02,670 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ab7c961-5a72-428b-8a60-70c6308b0128/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 00:02:02,672 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ab7c961-5a72-428b-8a60-70c6308b0128/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2023-11-29 00:02:02,745 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2023-11-29 00:02:02,745 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-29 00:02:02,746 INFO L262 TraceCheckSpWp]: Trace formula consists of 126 conjuncts, 10 conjunts are in the unsatisfiable core [2023-11-29 00:02:02,748 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 00:02:02,848 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 00:02:02,848 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 00:02:02,967 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 00:02:02,968 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [795078998] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 00:02:02,968 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 00:02:02,968 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7, 8] total 16 [2023-11-29 00:02:02,968 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [384320302] [2023-11-29 00:02:02,968 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 00:02:02,968 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2023-11-29 00:02:02,969 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 00:02:02,969 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2023-11-29 00:02:02,969 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=191, Unknown=0, NotChecked=0, Total=240 [2023-11-29 00:02:02,987 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 22 [2023-11-29 00:02:02,987 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 294 places, 1326 transitions, 32968 flow. Second operand has 16 states, 16 states have (on average 5.75) internal successors, (92), 16 states have internal predecessors, (92), 0 states have call successors, (0), 0 states 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 00:02:02,987 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 00:02:02,987 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 22 [2023-11-29 00:02:02,987 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 00:02:09,589 INFO L124 PetriNetUnfolderBase]: 6190/10450 cut-off events. [2023-11-29 00:02:09,589 INFO L125 PetriNetUnfolderBase]: For 396726/396726 co-relation queries the response was YES. [2023-11-29 00:02:09,666 INFO L83 FinitePrefix]: Finished finitePrefix Result has 105814 conditions, 10450 events. 6190/10450 cut-off events. For 396726/396726 co-relation queries the response was YES. Maximal size of possible extension queue 532. Compared 71763 event pairs, 98 based on Foata normal form. 146/10596 useless extension candidates. Maximal degree in co-relation 104531. Up to 2643 conditions per place. [2023-11-29 00:02:09,722 INFO L140 encePairwiseOnDemand]: 11/22 looper letters, 612 selfloop transitions, 1777 changer transitions 9/2399 dead transitions. [2023-11-29 00:02:09,722 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 338 places, 2399 transitions, 62286 flow [2023-11-29 00:02:09,723 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2023-11-29 00:02:09,723 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 45 states. [2023-11-29 00:02:09,724 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 403 transitions. [2023-11-29 00:02:09,724 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4070707070707071 [2023-11-29 00:02:09,724 INFO L72 ComplementDD]: Start complementDD. Operand 45 states and 403 transitions. [2023-11-29 00:02:09,724 INFO L73 IsDeterministic]: Start isDeterministic. Operand 45 states and 403 transitions. [2023-11-29 00:02:09,828 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 00:02:09,828 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 45 states and 403 transitions. [2023-11-29 00:02:09,830 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 46 states, 45 states have (on average 8.955555555555556) internal successors, (403), 45 states have internal predecessors, (403), 0 states have call successors, (0), 0 states 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 00:02:09,832 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 46 states, 46 states have (on average 22.0) internal successors, (1012), 46 states have internal predecessors, (1012), 0 states have call successors, (0), 0 states 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 00:02:09,832 INFO L81 ComplementDD]: Finished complementDD. Result has 46 states, 46 states have (on average 22.0) internal successors, (1012), 46 states have internal predecessors, (1012), 0 states have call successors, (0), 0 states 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 00:02:09,832 INFO L175 Difference]: Start difference. First operand has 294 places, 1326 transitions, 32968 flow. Second operand 45 states and 403 transitions. [2023-11-29 00:02:09,832 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 338 places, 2399 transitions, 62286 flow [2023-11-29 00:02:15,355 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 328 places, 2399 transitions, 61541 flow, removed 148 selfloop flow, removed 10 redundant places. [2023-11-29 00:02:15,421 INFO L231 Difference]: Finished difference. Result has 355 places, 2236 transitions, 62038 flow [2023-11-29 00:02:15,422 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=22, PETRI_DIFFERENCE_MINUEND_FLOW=32377, PETRI_DIFFERENCE_MINUEND_PLACES=284, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1323, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=968, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=215, PETRI_DIFFERENCE_SUBTRAHEND_STATES=45, PETRI_FLOW=62038, PETRI_PLACES=355, PETRI_TRANSITIONS=2236} [2023-11-29 00:02:15,422 INFO L281 CegarLoopForPetriNet]: 24 programPoint places, 331 predicate places. [2023-11-29 00:02:15,422 INFO L495 AbstractCegarLoop]: Abstraction has has 355 places, 2236 transitions, 62038 flow [2023-11-29 00:02:15,423 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 5.75) internal successors, (92), 16 states have internal predecessors, (92), 0 states have call successors, (0), 0 states 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 00:02:15,423 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 00:02:15,423 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 00:02:15,429 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ab7c961-5a72-428b-8a60-70c6308b0128/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Ended with exit code 0 [2023-11-29 00:02:15,623 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ab7c961-5a72-428b-8a60-70c6308b0128/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2023-11-29 00:02:15,623 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 00:02:15,624 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 00:02:15,624 INFO L85 PathProgramCache]: Analyzing trace with hash 994191503, now seen corresponding path program 10 times [2023-11-29 00:02:15,624 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 00:02:15,624 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1697523558] [2023-11-29 00:02:15,624 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 00:02:15,624 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 00:02:15,640 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 00:02:15,830 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 00:02:15,830 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 00:02:15,830 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1697523558] [2023-11-29 00:02:15,830 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1697523558] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 00:02:15,831 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [745471545] [2023-11-29 00:02:15,831 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-11-29 00:02:15,831 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 00:02:15,831 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ab7c961-5a72-428b-8a60-70c6308b0128/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 00:02:15,833 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ab7c961-5a72-428b-8a60-70c6308b0128/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 00:02:15,840 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ab7c961-5a72-428b-8a60-70c6308b0128/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2023-11-29 00:02:15,912 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-11-29 00:02:15,912 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-29 00:02:15,913 INFO L262 TraceCheckSpWp]: Trace formula consists of 126 conjuncts, 10 conjunts are in the unsatisfiable core [2023-11-29 00:02:15,915 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 00:02:16,029 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 00:02:16,029 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 00:02:16,216 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 5 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 00:02:16,216 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [745471545] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 00:02:16,216 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 00:02:16,216 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 8, 7] total 17 [2023-11-29 00:02:16,216 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [964343848] [2023-11-29 00:02:16,216 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 00:02:16,217 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2023-11-29 00:02:16,217 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 00:02:16,218 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2023-11-29 00:02:16,218 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=202, Unknown=0, NotChecked=0, Total=272 [2023-11-29 00:02:16,236 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 22 [2023-11-29 00:02:16,237 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 355 places, 2236 transitions, 62038 flow. Second operand has 17 states, 17 states have (on average 6.0) internal successors, (102), 17 states have internal predecessors, (102), 0 states have call successors, (0), 0 states 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 00:02:16,237 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 00:02:16,237 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 22 [2023-11-29 00:02:16,237 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 00:02:25,704 INFO L124 PetriNetUnfolderBase]: 6482/11228 cut-off events. [2023-11-29 00:02:25,704 INFO L125 PetriNetUnfolderBase]: For 460520/460552 co-relation queries the response was YES. [2023-11-29 00:02:25,812 INFO L83 FinitePrefix]: Finished finitePrefix Result has 129033 conditions, 11228 events. 6482/11228 cut-off events. For 460520/460552 co-relation queries the response was YES. Maximal size of possible extension queue 607. Compared 81411 event pairs, 344 based on Foata normal form. 38/11264 useless extension candidates. Maximal degree in co-relation 127533. Up to 2895 conditions per place. [2023-11-29 00:02:25,881 INFO L140 encePairwiseOnDemand]: 14/22 looper letters, 467 selfloop transitions, 2072 changer transitions 6/2631 dead transitions. [2023-11-29 00:02:25,881 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 384 places, 2631 transitions, 76726 flow [2023-11-29 00:02:25,881 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2023-11-29 00:02:25,881 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 31 states. [2023-11-29 00:02:25,882 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 305 transitions. [2023-11-29 00:02:25,882 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4472140762463343 [2023-11-29 00:02:25,882 INFO L72 ComplementDD]: Start complementDD. Operand 31 states and 305 transitions. [2023-11-29 00:02:25,883 INFO L73 IsDeterministic]: Start isDeterministic. Operand 31 states and 305 transitions. [2023-11-29 00:02:25,883 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 00:02:25,883 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 31 states and 305 transitions. [2023-11-29 00:02:25,884 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 32 states, 31 states have (on average 9.838709677419354) internal successors, (305), 31 states have internal predecessors, (305), 0 states have call successors, (0), 0 states 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 00:02:25,885 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 32 states, 32 states have (on average 22.0) internal successors, (704), 32 states have internal predecessors, (704), 0 states have call successors, (0), 0 states 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 00:02:25,885 INFO L81 ComplementDD]: Finished complementDD. Result has 32 states, 32 states have (on average 22.0) internal successors, (704), 32 states have internal predecessors, (704), 0 states have call successors, (0), 0 states 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 00:02:25,885 INFO L175 Difference]: Start difference. First operand has 355 places, 2236 transitions, 62038 flow. Second operand 31 states and 305 transitions. [2023-11-29 00:02:25,885 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 384 places, 2631 transitions, 76726 flow [2023-11-29 00:02:36,365 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 375 places, 2631 transitions, 74545 flow, removed 733 selfloop flow, removed 9 redundant places. [2023-11-29 00:02:36,449 INFO L231 Difference]: Finished difference. Result has 387 places, 2530 transitions, 76314 flow [2023-11-29 00:02:36,451 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=22, PETRI_DIFFERENCE_MINUEND_FLOW=60214, PETRI_DIFFERENCE_MINUEND_PLACES=345, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=2231, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1801, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=343, PETRI_DIFFERENCE_SUBTRAHEND_STATES=31, PETRI_FLOW=76314, PETRI_PLACES=387, PETRI_TRANSITIONS=2530} [2023-11-29 00:02:36,452 INFO L281 CegarLoopForPetriNet]: 24 programPoint places, 363 predicate places. [2023-11-29 00:02:36,452 INFO L495 AbstractCegarLoop]: Abstraction has has 387 places, 2530 transitions, 76314 flow [2023-11-29 00:02:36,452 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 6.0) internal successors, (102), 17 states have internal predecessors, (102), 0 states have call successors, (0), 0 states 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 00:02:36,453 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 00:02:36,453 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 00:02:36,457 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ab7c961-5a72-428b-8a60-70c6308b0128/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Ended with exit code 0 [2023-11-29 00:02:36,653 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ab7c961-5a72-428b-8a60-70c6308b0128/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2023-11-29 00:02:36,653 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 00:02:36,654 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 00:02:36,654 INFO L85 PathProgramCache]: Analyzing trace with hash 1559645831, now seen corresponding path program 11 times [2023-11-29 00:02:36,654 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 00:02:36,654 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1616941776] [2023-11-29 00:02:36,654 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 00:02:36,654 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 00:02:36,668 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 00:02:36,779 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 00:02:36,779 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 00:02:36,779 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1616941776] [2023-11-29 00:02:36,779 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1616941776] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 00:02:36,780 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1168027989] [2023-11-29 00:02:36,780 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-11-29 00:02:36,780 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 00:02:36,780 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ab7c961-5a72-428b-8a60-70c6308b0128/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 00:02:36,781 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ab7c961-5a72-428b-8a60-70c6308b0128/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 00:02:36,783 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ab7c961-5a72-428b-8a60-70c6308b0128/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2023-11-29 00:02:36,859 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2023-11-29 00:02:36,859 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-29 00:02:36,860 INFO L262 TraceCheckSpWp]: Trace formula consists of 27 conjuncts, 9 conjunts are in the unsatisfiable core [2023-11-29 00:02:36,861 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 00:02:36,984 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 5 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 00:02:36,984 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 00:02:37,253 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 5 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 00:02:37,254 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1168027989] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 00:02:37,254 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 00:02:37,254 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 8] total 17 [2023-11-29 00:02:37,254 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1576169172] [2023-11-29 00:02:37,254 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 00:02:37,254 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2023-11-29 00:02:37,255 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 00:02:37,255 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2023-11-29 00:02:37,255 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=202, Unknown=0, NotChecked=0, Total=272 [2023-11-29 00:02:37,267 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 22 [2023-11-29 00:02:37,267 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 387 places, 2530 transitions, 76314 flow. Second operand has 17 states, 17 states have (on average 5.9411764705882355) internal successors, (101), 17 states have internal predecessors, (101), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 00:02:37,267 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 00:02:37,268 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 22 [2023-11-29 00:02:37,268 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 00:02:48,951 INFO L124 PetriNetUnfolderBase]: 6901/11921 cut-off events. [2023-11-29 00:02:48,951 INFO L125 PetriNetUnfolderBase]: For 489822/489884 co-relation queries the response was YES. [2023-11-29 00:02:49,044 INFO L83 FinitePrefix]: Finished finitePrefix Result has 145508 conditions, 11921 events. 6901/11921 cut-off events. For 489822/489884 co-relation queries the response was YES. Maximal size of possible extension queue 647. Compared 87425 event pairs, 304 based on Foata normal form. 32/11953 useless extension candidates. Maximal degree in co-relation 143665. Up to 2927 conditions per place. [2023-11-29 00:02:49,115 INFO L140 encePairwiseOnDemand]: 14/22 looper letters, 341 selfloop transitions, 2457 changer transitions 8/2892 dead transitions. [2023-11-29 00:02:49,115 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 419 places, 2892 transitions, 90706 flow [2023-11-29 00:02:49,116 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2023-11-29 00:02:49,116 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 35 states. [2023-11-29 00:02:49,117 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 301 transitions. [2023-11-29 00:02:49,117 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.39090909090909093 [2023-11-29 00:02:49,117 INFO L72 ComplementDD]: Start complementDD. Operand 35 states and 301 transitions. [2023-11-29 00:02:49,118 INFO L73 IsDeterministic]: Start isDeterministic. Operand 35 states and 301 transitions. [2023-11-29 00:02:49,118 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 00:02:49,118 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 35 states and 301 transitions. [2023-11-29 00:02:49,119 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 36 states, 35 states have (on average 8.6) internal successors, (301), 35 states have internal predecessors, (301), 0 states have call successors, (0), 0 states 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 00:02:49,120 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 36 states, 36 states have (on average 22.0) internal successors, (792), 36 states have internal predecessors, (792), 0 states have call successors, (0), 0 states 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 00:02:49,121 INFO L81 ComplementDD]: Finished complementDD. Result has 36 states, 36 states have (on average 22.0) internal successors, (792), 36 states have internal predecessors, (792), 0 states have call successors, (0), 0 states 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 00:02:49,121 INFO L175 Difference]: Start difference. First operand has 387 places, 2530 transitions, 76314 flow. Second operand 35 states and 301 transitions. [2023-11-29 00:02:49,121 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 419 places, 2892 transitions, 90706 flow [2023-11-29 00:03:00,143 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 406 places, 2892 transitions, 89885 flow, removed 172 selfloop flow, removed 13 redundant places. [2023-11-29 00:03:00,238 INFO L231 Difference]: Finished difference. Result has 412 places, 2821 transitions, 91357 flow [2023-11-29 00:03:00,240 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=22, PETRI_DIFFERENCE_MINUEND_FLOW=75486, PETRI_DIFFERENCE_MINUEND_PLACES=372, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=2528, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2171, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=338, PETRI_DIFFERENCE_SUBTRAHEND_STATES=35, PETRI_FLOW=91357, PETRI_PLACES=412, PETRI_TRANSITIONS=2821} [2023-11-29 00:03:00,240 INFO L281 CegarLoopForPetriNet]: 24 programPoint places, 388 predicate places. [2023-11-29 00:03:00,241 INFO L495 AbstractCegarLoop]: Abstraction has has 412 places, 2821 transitions, 91357 flow [2023-11-29 00:03:00,241 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 5.9411764705882355) internal successors, (101), 17 states have internal predecessors, (101), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 00:03:00,241 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 00:03:00,241 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 00:03:00,245 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ab7c961-5a72-428b-8a60-70c6308b0128/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Ended with exit code 0 [2023-11-29 00:03:00,441 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ab7c961-5a72-428b-8a60-70c6308b0128/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2023-11-29 00:03:00,441 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 00:03:00,442 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 00:03:00,442 INFO L85 PathProgramCache]: Analyzing trace with hash -1497512377, now seen corresponding path program 12 times [2023-11-29 00:03:00,442 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 00:03:00,442 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [998037375] [2023-11-29 00:03:00,442 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 00:03:00,442 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 00:03:00,456 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 00:03:00,659 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 00:03:00,659 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 00:03:00,660 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [998037375] [2023-11-29 00:03:00,660 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [998037375] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 00:03:00,660 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [350347436] [2023-11-29 00:03:00,660 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-11-29 00:03:00,660 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 00:03:00,660 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ab7c961-5a72-428b-8a60-70c6308b0128/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 00:03:00,661 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ab7c961-5a72-428b-8a60-70c6308b0128/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 00:03:00,662 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ab7c961-5a72-428b-8a60-70c6308b0128/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2023-11-29 00:03:00,728 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2023-11-29 00:03:00,728 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-29 00:03:00,729 INFO L262 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 9 conjunts are in the unsatisfiable core [2023-11-29 00:03:00,730 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 00:03:00,811 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 00:03:00,811 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 00:03:00,991 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 00:03:00,991 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [350347436] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 00:03:00,991 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 00:03:00,991 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7, 7] total 15 [2023-11-29 00:03:00,991 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [642516051] [2023-11-29 00:03:00,992 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 00:03:00,992 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2023-11-29 00:03:00,992 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 00:03:00,993 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2023-11-29 00:03:00,993 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=160, Unknown=0, NotChecked=0, Total=210 [2023-11-29 00:03:00,999 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 22 [2023-11-29 00:03:00,999 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 412 places, 2821 transitions, 91357 flow. Second operand has 15 states, 15 states have (on average 6.533333333333333) internal successors, (98), 15 states have internal predecessors, (98), 0 states have call successors, (0), 0 states 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 00:03:00,999 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 00:03:00,999 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 22 [2023-11-29 00:03:00,999 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 00:03:17,362 INFO L124 PetriNetUnfolderBase]: 8714/14993 cut-off events. [2023-11-29 00:03:17,362 INFO L125 PetriNetUnfolderBase]: For 711613/711757 co-relation queries the response was YES. [2023-11-29 00:03:17,537 INFO L83 FinitePrefix]: Finished finitePrefix Result has 198836 conditions, 14993 events. 8714/14993 cut-off events. For 711613/711757 co-relation queries the response was YES. Maximal size of possible extension queue 802. Compared 112625 event pairs, 724 based on Foata normal form. 80/15071 useless extension candidates. Maximal degree in co-relation 195803. Up to 4880 conditions per place. [2023-11-29 00:03:17,680 INFO L140 encePairwiseOnDemand]: 14/22 looper letters, 1109 selfloop transitions, 2484 changer transitions 0/3679 dead transitions. [2023-11-29 00:03:17,680 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 436 places, 3679 transitions, 126627 flow [2023-11-29 00:03:17,681 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2023-11-29 00:03:17,681 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2023-11-29 00:03:17,681 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 254 transitions. [2023-11-29 00:03:17,682 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44405594405594406 [2023-11-29 00:03:17,682 INFO L72 ComplementDD]: Start complementDD. Operand 26 states and 254 transitions. [2023-11-29 00:03:17,682 INFO L73 IsDeterministic]: Start isDeterministic. Operand 26 states and 254 transitions. [2023-11-29 00:03:17,682 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 00:03:17,682 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 26 states and 254 transitions. [2023-11-29 00:03:17,683 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 27 states, 26 states have (on average 9.76923076923077) internal successors, (254), 26 states have internal predecessors, (254), 0 states have call successors, (0), 0 states 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 00:03:17,684 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 00:03:17,684 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 00:03:17,684 INFO L175 Difference]: Start difference. First operand has 412 places, 2821 transitions, 91357 flow. Second operand 26 states and 254 transitions. [2023-11-29 00:03:17,684 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 436 places, 3679 transitions, 126627 flow [2023-11-29 00:03:40,462 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 422 places, 3679 transitions, 124658 flow, removed 675 selfloop flow, removed 14 redundant places. [2023-11-29 00:03:40,571 INFO L231 Difference]: Finished difference. Result has 443 places, 3580 transitions, 126443 flow [2023-11-29 00:03:40,573 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=22, PETRI_DIFFERENCE_MINUEND_FLOW=90045, PETRI_DIFFERENCE_MINUEND_PLACES=397, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=2820, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1776, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=739, PETRI_DIFFERENCE_SUBTRAHEND_STATES=26, PETRI_FLOW=126443, PETRI_PLACES=443, PETRI_TRANSITIONS=3580} [2023-11-29 00:03:40,573 INFO L281 CegarLoopForPetriNet]: 24 programPoint places, 419 predicate places. [2023-11-29 00:03:40,573 INFO L495 AbstractCegarLoop]: Abstraction has has 443 places, 3580 transitions, 126443 flow [2023-11-29 00:03:40,573 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 6.533333333333333) internal successors, (98), 15 states have internal predecessors, (98), 0 states have call successors, (0), 0 states 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 00:03:40,574 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 00:03:40,574 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 00:03:40,577 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ab7c961-5a72-428b-8a60-70c6308b0128/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Ended with exit code 0 [2023-11-29 00:03:40,774 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ab7c961-5a72-428b-8a60-70c6308b0128/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2023-11-29 00:03:40,774 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 00:03:40,775 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 00:03:40,775 INFO L85 PathProgramCache]: Analyzing trace with hash -476370395, now seen corresponding path program 13 times [2023-11-29 00:03:40,775 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 00:03:40,775 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1065004019] [2023-11-29 00:03:40,775 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 00:03:40,775 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 00:03:40,786 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 00:03:40,915 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 00:03:40,916 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 00:03:40,916 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1065004019] [2023-11-29 00:03:40,916 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1065004019] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 00:03:40,916 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1490283911] [2023-11-29 00:03:40,916 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-11-29 00:03:40,916 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 00:03:40,916 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ab7c961-5a72-428b-8a60-70c6308b0128/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 00:03:40,917 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ab7c961-5a72-428b-8a60-70c6308b0128/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 00:03:40,920 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ab7c961-5a72-428b-8a60-70c6308b0128/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2023-11-29 00:03:40,996 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 00:03:40,998 INFO L262 TraceCheckSpWp]: Trace formula consists of 126 conjuncts, 10 conjunts are in the unsatisfiable core [2023-11-29 00:03:40,999 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 00:03:41,098 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 00:03:41,098 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 00:03:41,349 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 00:03:41,349 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1490283911] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 00:03:41,349 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 00:03:41,349 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 8, 8] total 17 [2023-11-29 00:03:41,349 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [859091384] [2023-11-29 00:03:41,349 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 00:03:41,349 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2023-11-29 00:03:41,350 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 00:03:41,350 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2023-11-29 00:03:41,350 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=191, Unknown=0, NotChecked=0, Total=272 [2023-11-29 00:03:41,365 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 22 [2023-11-29 00:03:41,366 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 443 places, 3580 transitions, 126443 flow. Second operand has 17 states, 17 states have (on average 5.9411764705882355) internal successors, (101), 17 states have internal predecessors, (101), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 00:03:41,366 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 00:03:41,366 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 22 [2023-11-29 00:03:41,366 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 00:04:01,572 INFO L124 PetriNetUnfolderBase]: 9061/15582 cut-off events. [2023-11-29 00:04:01,572 INFO L125 PetriNetUnfolderBase]: For 799298/799420 co-relation queries the response was YES. [2023-11-29 00:04:01,726 INFO L83 FinitePrefix]: Finished finitePrefix Result has 218612 conditions, 15582 events. 9061/15582 cut-off events. For 799298/799420 co-relation queries the response was YES. Maximal size of possible extension queue 825. Compared 117722 event pairs, 1497 based on Foata normal form. 12/15590 useless extension candidates. Maximal degree in co-relation 216504. Up to 9020 conditions per place. [2023-11-29 00:04:01,838 INFO L140 encePairwiseOnDemand]: 14/22 looper letters, 1768 selfloop transitions, 1947 changer transitions 3/3804 dead transitions. [2023-11-29 00:04:01,838 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 463 places, 3804 transitions, 141222 flow [2023-11-29 00:04:01,838 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2023-11-29 00:04:01,838 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2023-11-29 00:04:01,839 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 199 transitions. [2023-11-29 00:04:01,839 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43073593073593075 [2023-11-29 00:04:01,839 INFO L72 ComplementDD]: Start complementDD. Operand 21 states and 199 transitions. [2023-11-29 00:04:01,839 INFO L73 IsDeterministic]: Start isDeterministic. Operand 21 states and 199 transitions. [2023-11-29 00:04:01,839 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 00:04:01,840 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 21 states and 199 transitions. [2023-11-29 00:04:01,840 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 22 states, 21 states have (on average 9.476190476190476) internal successors, (199), 21 states have internal predecessors, (199), 0 states have call successors, (0), 0 states 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 00:04:01,841 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 00:04:01,841 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 00:04:01,841 INFO L175 Difference]: Start difference. First operand has 443 places, 3580 transitions, 126443 flow. Second operand 21 states and 199 transitions. [2023-11-29 00:04:01,841 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 463 places, 3804 transitions, 141222 flow [2023-11-29 00:04:28,057 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 458 places, 3804 transitions, 139875 flow, removed 472 selfloop flow, removed 5 redundant places. [2023-11-29 00:04:28,183 INFO L231 Difference]: Finished difference. Result has 467 places, 3742 transitions, 138969 flow [2023-11-29 00:04:28,185 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=22, PETRI_DIFFERENCE_MINUEND_FLOW=125163, PETRI_DIFFERENCE_MINUEND_PLACES=438, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=3578, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1790, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=1672, PETRI_DIFFERENCE_SUBTRAHEND_STATES=21, PETRI_FLOW=138969, PETRI_PLACES=467, PETRI_TRANSITIONS=3742} [2023-11-29 00:04:28,186 INFO L281 CegarLoopForPetriNet]: 24 programPoint places, 443 predicate places. [2023-11-29 00:04:28,186 INFO L495 AbstractCegarLoop]: Abstraction has has 467 places, 3742 transitions, 138969 flow [2023-11-29 00:04:28,186 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 5.9411764705882355) internal successors, (101), 17 states have internal predecessors, (101), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 00:04:28,186 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 00:04:28,186 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 00:04:28,191 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ab7c961-5a72-428b-8a60-70c6308b0128/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Ended with exit code 0 [2023-11-29 00:04:28,387 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ab7c961-5a72-428b-8a60-70c6308b0128/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2023-11-29 00:04:28,387 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 00:04:28,387 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 00:04:28,387 INFO L85 PathProgramCache]: Analyzing trace with hash -2138554647, now seen corresponding path program 14 times [2023-11-29 00:04:28,388 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 00:04:28,388 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1113728927] [2023-11-29 00:04:28,388 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 00:04:28,388 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 00:04:28,402 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 00:04:28,585 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 00:04:28,585 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 00:04:28,585 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1113728927] [2023-11-29 00:04:28,586 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1113728927] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 00:04:28,586 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1633973572] [2023-11-29 00:04:28,586 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-29 00:04:28,586 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 00:04:28,586 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ab7c961-5a72-428b-8a60-70c6308b0128/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 00:04:28,588 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ab7c961-5a72-428b-8a60-70c6308b0128/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 00:04:28,592 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ab7c961-5a72-428b-8a60-70c6308b0128/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2023-11-29 00:04:28,676 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-11-29 00:04:28,676 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-29 00:04:28,677 INFO L262 TraceCheckSpWp]: Trace formula consists of 126 conjuncts, 10 conjunts are in the unsatisfiable core [2023-11-29 00:04:28,678 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 00:04:28,779 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 00:04:28,780 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 00:04:29,023 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 00:04:29,023 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1633973572] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 00:04:29,023 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 00:04:29,023 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 8, 8] total 18 [2023-11-29 00:04:29,023 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2124504713] [2023-11-29 00:04:29,023 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 00:04:29,024 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2023-11-29 00:04:29,024 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 00:04:29,024 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2023-11-29 00:04:29,025 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=227, Unknown=0, NotChecked=0, Total=306 [2023-11-29 00:04:29,026 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 22 [2023-11-29 00:04:29,026 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 467 places, 3742 transitions, 138969 flow. Second operand has 18 states, 18 states have (on average 6.111111111111111) internal successors, (110), 18 states have internal predecessors, (110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 00:04:29,026 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 00:04:29,026 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 22 [2023-11-29 00:04:29,026 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 00:04:52,725 INFO L124 PetriNetUnfolderBase]: 9240/15870 cut-off events. [2023-11-29 00:04:52,725 INFO L125 PetriNetUnfolderBase]: For 894803/894949 co-relation queries the response was YES. [2023-11-29 00:04:52,891 INFO L83 FinitePrefix]: Finished finitePrefix Result has 232387 conditions, 15870 events. 9240/15870 cut-off events. For 894803/894949 co-relation queries the response was YES. Maximal size of possible extension queue 844. Compared 120104 event pairs, 1039 based on Foata normal form. 16/15880 useless extension candidates. Maximal degree in co-relation 231883. Up to 7159 conditions per place. [2023-11-29 00:04:53,008 INFO L140 encePairwiseOnDemand]: 13/22 looper letters, 1034 selfloop transitions, 2770 changer transitions 3/3893 dead transitions. [2023-11-29 00:04:53,008 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 485 places, 3893 transitions, 151189 flow [2023-11-29 00:04:53,009 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2023-11-29 00:04:53,009 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2023-11-29 00:04:53,009 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 184 transitions. [2023-11-29 00:04:53,010 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41818181818181815 [2023-11-29 00:04:53,010 INFO L72 ComplementDD]: Start complementDD. Operand 20 states and 184 transitions. [2023-11-29 00:04:53,010 INFO L73 IsDeterministic]: Start isDeterministic. Operand 20 states and 184 transitions. [2023-11-29 00:04:53,010 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 00:04:53,010 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 20 states and 184 transitions. [2023-11-29 00:04:53,010 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 21 states, 20 states have (on average 9.2) internal successors, (184), 20 states have internal predecessors, (184), 0 states have call successors, (0), 0 states 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 00:04:53,011 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 21 states, 21 states have (on average 22.0) internal successors, (462), 21 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 00:04:53,011 INFO L81 ComplementDD]: Finished complementDD. Result has 21 states, 21 states have (on average 22.0) internal successors, (462), 21 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 00:04:53,011 INFO L175 Difference]: Start difference. First operand has 467 places, 3742 transitions, 138969 flow. Second operand 20 states and 184 transitions. [2023-11-29 00:04:53,011 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 485 places, 3893 transitions, 151189 flow [2023-11-29 00:05:20,782 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 480 places, 3893 transitions, 151080 flow, removed 16 selfloop flow, removed 5 redundant places. [2023-11-29 00:05:20,913 INFO L231 Difference]: Finished difference. Result has 490 places, 3847 transitions, 153332 flow [2023-11-29 00:05:20,916 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=22, PETRI_DIFFERENCE_MINUEND_FLOW=138798, PETRI_DIFFERENCE_MINUEND_PLACES=461, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=3740, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2668, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=1011, PETRI_DIFFERENCE_SUBTRAHEND_STATES=20, PETRI_FLOW=153332, PETRI_PLACES=490, PETRI_TRANSITIONS=3847} [2023-11-29 00:05:20,916 INFO L281 CegarLoopForPetriNet]: 24 programPoint places, 466 predicate places. [2023-11-29 00:05:20,916 INFO L495 AbstractCegarLoop]: Abstraction has has 490 places, 3847 transitions, 153332 flow [2023-11-29 00:05:20,916 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 6.111111111111111) internal successors, (110), 18 states have internal predecessors, (110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 00:05:20,916 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 00:05:20,916 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 00:05:20,921 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ab7c961-5a72-428b-8a60-70c6308b0128/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Ended with exit code 0 [2023-11-29 00:05:21,117 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ab7c961-5a72-428b-8a60-70c6308b0128/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2023-11-29 00:05:21,117 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 00:05:21,117 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 00:05:21,117 INFO L85 PathProgramCache]: Analyzing trace with hash 1650066383, now seen corresponding path program 15 times [2023-11-29 00:05:21,117 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 00:05:21,117 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [653410082] [2023-11-29 00:05:21,117 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 00:05:21,118 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 00:05:21,128 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 00:05:21,284 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 00:05:21,284 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 00:05:21,284 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [653410082] [2023-11-29 00:05:21,284 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [653410082] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 00:05:21,284 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1164916903] [2023-11-29 00:05:21,284 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-11-29 00:05:21,284 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 00:05:21,285 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ab7c961-5a72-428b-8a60-70c6308b0128/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 00:05:21,285 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ab7c961-5a72-428b-8a60-70c6308b0128/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 00:05:21,288 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ab7c961-5a72-428b-8a60-70c6308b0128/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2023-11-29 00:05:21,368 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2023-11-29 00:05:21,368 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-29 00:05:21,369 INFO L262 TraceCheckSpWp]: Trace formula consists of 126 conjuncts, 10 conjunts are in the unsatisfiable core [2023-11-29 00:05:21,370 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 00:05:21,490 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 00:05:21,490 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 00:05:21,752 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 00:05:21,752 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1164916903] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 00:05:21,752 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 00:05:21,752 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 8, 8] total 18 [2023-11-29 00:05:21,752 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1290330075] [2023-11-29 00:05:21,752 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 00:05:21,753 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2023-11-29 00:05:21,753 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 00:05:21,753 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2023-11-29 00:05:21,753 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=231, Unknown=0, NotChecked=0, Total=306 [2023-11-29 00:05:21,755 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 22 [2023-11-29 00:05:21,756 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 490 places, 3847 transitions, 153332 flow. Second operand has 18 states, 18 states have (on average 6.111111111111111) internal successors, (110), 18 states have internal predecessors, (110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 00:05:21,756 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 00:05:21,756 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 22 [2023-11-29 00:05:21,756 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 00:05:44,796 INFO L124 PetriNetUnfolderBase]: 9262/15887 cut-off events. [2023-11-29 00:05:44,796 INFO L125 PetriNetUnfolderBase]: For 1035601/1035753 co-relation queries the response was YES. [2023-11-29 00:05:45,004 INFO L83 FinitePrefix]: Finished finitePrefix Result has 247120 conditions, 15887 events. 9262/15887 cut-off events. For 1035601/1035753 co-relation queries the response was YES. Maximal size of possible extension queue 840. Compared 119998 event pairs, 1574 based on Foata normal form. 12/15897 useless extension candidates. Maximal degree in co-relation 246950. Up to 9329 conditions per place. [2023-11-29 00:05:45,248 INFO L140 encePairwiseOnDemand]: 13/22 looper letters, 1895 selfloop transitions, 1902 changer transitions 5/3888 dead transitions. [2023-11-29 00:05:45,248 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 501 places, 3888 transitions, 161810 flow [2023-11-29 00:05:45,249 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2023-11-29 00:05:45,249 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2023-11-29 00:05:45,249 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 119 transitions. [2023-11-29 00:05:45,249 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4160839160839161 [2023-11-29 00:05:45,249 INFO L72 ComplementDD]: Start complementDD. Operand 13 states and 119 transitions. [2023-11-29 00:05:45,249 INFO L73 IsDeterministic]: Start isDeterministic. Operand 13 states and 119 transitions. [2023-11-29 00:05:45,249 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 00:05:45,249 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 13 states and 119 transitions. [2023-11-29 00:05:45,250 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 14 states, 13 states have (on average 9.153846153846153) internal successors, (119), 13 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 00:05:45,250 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 14 states, 14 states have (on average 22.0) internal successors, (308), 14 states have internal predecessors, (308), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 00:05:45,250 INFO L81 ComplementDD]: Finished complementDD. Result has 14 states, 14 states have (on average 22.0) internal successors, (308), 14 states have internal predecessors, (308), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 00:05:45,250 INFO L175 Difference]: Start difference. First operand has 490 places, 3847 transitions, 153332 flow. Second operand 13 states and 119 transitions. [2023-11-29 00:05:45,250 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 501 places, 3888 transitions, 161810 flow [2023-11-29 00:06:15,473 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 492 places, 3888 transitions, 160497 flow, removed 349 selfloop flow, removed 9 redundant places. [2023-11-29 00:06:15,640 INFO L231 Difference]: Finished difference. Result has 497 places, 3859 transitions, 159957 flow [2023-11-29 00:06:15,643 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=22, PETRI_DIFFERENCE_MINUEND_FLOW=152010, PETRI_DIFFERENCE_MINUEND_PLACES=480, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=3845, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1886, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=1943, PETRI_DIFFERENCE_SUBTRAHEND_STATES=13, PETRI_FLOW=159957, PETRI_PLACES=497, PETRI_TRANSITIONS=3859} [2023-11-29 00:06:15,643 INFO L281 CegarLoopForPetriNet]: 24 programPoint places, 473 predicate places. [2023-11-29 00:06:15,643 INFO L495 AbstractCegarLoop]: Abstraction has has 497 places, 3859 transitions, 159957 flow [2023-11-29 00:06:15,644 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 6.111111111111111) internal successors, (110), 18 states have internal predecessors, (110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 00:06:15,644 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 00:06:15,644 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 00:06:15,648 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ab7c961-5a72-428b-8a60-70c6308b0128/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Ended with exit code 0 [2023-11-29 00:06:15,844 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ab7c961-5a72-428b-8a60-70c6308b0128/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2023-11-29 00:06:15,844 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 00:06:15,845 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 00:06:15,845 INFO L85 PathProgramCache]: Analyzing trace with hash -1902275881, now seen corresponding path program 16 times [2023-11-29 00:06:15,845 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 00:06:15,845 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [689070121] [2023-11-29 00:06:15,845 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 00:06:15,845 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 00:06:15,861 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 00:06:16,374 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 00:06:16,374 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 00:06:16,374 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [689070121] [2023-11-29 00:06:16,374 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [689070121] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 00:06:16,374 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [977031504] [2023-11-29 00:06:16,374 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-11-29 00:06:16,375 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 00:06:16,375 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ab7c961-5a72-428b-8a60-70c6308b0128/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 00:06:16,376 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ab7c961-5a72-428b-8a60-70c6308b0128/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 00:06:16,380 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ab7c961-5a72-428b-8a60-70c6308b0128/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2023-11-29 00:06:16,473 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-11-29 00:06:16,474 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-29 00:06:16,475 INFO L262 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 18 conjunts are in the unsatisfiable core [2023-11-29 00:06:16,477 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 00:06:16,971 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 00:06:16,971 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 00:06:18,908 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 00:06:18,909 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [977031504] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 00:06:18,909 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 00:06:18,909 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 11] total 26 [2023-11-29 00:06:18,909 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1725253291] [2023-11-29 00:06:18,909 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 00:06:18,909 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2023-11-29 00:06:18,910 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 00:06:18,910 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2023-11-29 00:06:18,910 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=145, Invalid=557, Unknown=0, NotChecked=0, Total=702 [2023-11-29 00:06:18,956 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 22 [2023-11-29 00:06:18,956 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 497 places, 3859 transitions, 159957 flow. Second operand has 27 states, 27 states have (on average 5.37037037037037) internal successors, (145), 27 states have internal predecessors, (145), 0 states have call successors, (0), 0 states 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 00:06:18,956 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 00:06:18,956 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 22 [2023-11-29 00:06:18,956 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 00:06:31,868 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.42s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2023-11-29 00:07:05,498 INFO L124 PetriNetUnfolderBase]: 10568/17809 cut-off events. [2023-11-29 00:07:05,498 INFO L125 PetriNetUnfolderBase]: For 1188899/1188899 co-relation queries the response was YES. [2023-11-29 00:07:05,801 INFO L83 FinitePrefix]: Finished finitePrefix Result has 278685 conditions, 17809 events. 10568/17809 cut-off events. For 1188899/1188899 co-relation queries the response was YES. Maximal size of possible extension queue 913. Compared 133543 event pairs, 98 based on Foata normal form. 60/17869 useless extension candidates. Maximal degree in co-relation 278511. Up to 7522 conditions per place. [2023-11-29 00:07:05,941 INFO L140 encePairwiseOnDemand]: 11/22 looper letters, 2139 selfloop transitions, 2291 changer transitions 19/4450 dead transitions. [2023-11-29 00:07:05,941 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 544 places, 4450 transitions, 187512 flow [2023-11-29 00:07:05,942 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2023-11-29 00:07:05,942 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 51 states. [2023-11-29 00:07:05,943 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 433 transitions. [2023-11-29 00:07:05,943 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3859180035650624 [2023-11-29 00:07:05,943 INFO L72 ComplementDD]: Start complementDD. Operand 51 states and 433 transitions. [2023-11-29 00:07:05,943 INFO L73 IsDeterministic]: Start isDeterministic. Operand 51 states and 433 transitions. [2023-11-29 00:07:05,944 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 00:07:05,944 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 51 states and 433 transitions. [2023-11-29 00:07:05,945 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 52 states, 51 states have (on average 8.490196078431373) internal successors, (433), 51 states have internal predecessors, (433), 0 states have call successors, (0), 0 states 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 00:07:05,947 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 52 states, 52 states have (on average 22.0) internal successors, (1144), 52 states have internal predecessors, (1144), 0 states have call successors, (0), 0 states 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 00:07:05,947 INFO L81 ComplementDD]: Finished complementDD. Result has 52 states, 52 states have (on average 22.0) internal successors, (1144), 52 states have internal predecessors, (1144), 0 states have call successors, (0), 0 states 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 00:07:05,947 INFO L175 Difference]: Start difference. First operand has 497 places, 3859 transitions, 159957 flow. Second operand 51 states and 433 transitions. [2023-11-29 00:07:05,947 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 544 places, 4450 transitions, 187512 flow [2023-11-29 00:07:47,841 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 541 places, 4450 transitions, 187416 flow, removed 35 selfloop flow, removed 3 redundant places. [2023-11-29 00:07:48,066 INFO L231 Difference]: Finished difference. Result has 564 places, 4141 transitions, 179589 flow [2023-11-29 00:07:48,070 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=22, PETRI_DIFFERENCE_MINUEND_FLOW=159653, PETRI_DIFFERENCE_MINUEND_PLACES=491, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=3850, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2020, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=1759, PETRI_DIFFERENCE_SUBTRAHEND_STATES=51, PETRI_FLOW=179589, PETRI_PLACES=564, PETRI_TRANSITIONS=4141} [2023-11-29 00:07:48,070 INFO L281 CegarLoopForPetriNet]: 24 programPoint places, 540 predicate places. [2023-11-29 00:07:48,071 INFO L495 AbstractCegarLoop]: Abstraction has has 564 places, 4141 transitions, 179589 flow [2023-11-29 00:07:48,071 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 5.37037037037037) internal successors, (145), 27 states have internal predecessors, (145), 0 states have call successors, (0), 0 states 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 00:07:48,071 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 00:07:48,071 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 00:07:48,077 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ab7c961-5a72-428b-8a60-70c6308b0128/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Ended with exit code 0 [2023-11-29 00:07:48,271 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ab7c961-5a72-428b-8a60-70c6308b0128/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2023-11-29 00:07:48,272 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 00:07:48,272 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 00:07:48,272 INFO L85 PathProgramCache]: Analyzing trace with hash -201242879, now seen corresponding path program 17 times [2023-11-29 00:07:48,272 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 00:07:48,272 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1421726217] [2023-11-29 00:07:48,272 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 00:07:48,273 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 00:07:48,296 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 00:07:48,485 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 00:07:48,486 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 00:07:48,486 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1421726217] [2023-11-29 00:07:48,486 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1421726217] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 00:07:48,486 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1237315359] [2023-11-29 00:07:48,486 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-11-29 00:07:48,486 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 00:07:48,486 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ab7c961-5a72-428b-8a60-70c6308b0128/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 00:07:48,487 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ab7c961-5a72-428b-8a60-70c6308b0128/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 00:07:48,491 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ab7c961-5a72-428b-8a60-70c6308b0128/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2023-11-29 00:07:48,597 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2023-11-29 00:07:48,597 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-29 00:07:48,598 INFO L262 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 11 conjunts are in the unsatisfiable core [2023-11-29 00:07:48,600 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 00:07:49,171 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 00:07:49,172 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 00:07:54,651 WARN L854 $PredicateComparison]: unable to prove that (let ((.cse6 (* (div (+ (- 1) c_~counter~0) 4294967296) 4294967296)) (.cse7 (+ 4294967295 c_~counter~0))) (let ((.cse3 (mod .cse7 4294967296)) (.cse5 (* (div (+ 4294967295 (* (- 1) c_~counter~0)) 4294967296) 4294967296)) (.cse2 (+ 4294967295 .cse6))) (and (forall ((v_z_123 Int)) (or (forall ((v_y_123 Int)) (let ((.cse1 (* v_y_123 4294967296))) (or (forall ((v_y_121 Int)) (let ((.cse0 (* v_y_121 4294967296))) (or (< (+ .cse0 .cse1) v_z_123) (< .cse2 (+ .cse0 c_~counter~0))))) (< (+ 4294967295 v_z_123) .cse1) (< .cse1 v_z_123)))) (< (+ .cse3 v_z_123) 4294967296) (< 4294967295 v_z_123) (< (mod (+ c_~counter~0 (* 2 v_z_123)) 4294967296) 1))) (forall ((v_z_123 Int)) (or (< (+ .cse3 v_z_123) 4294967296) (< 4294967295 v_z_123) (< (mod (+ c_~counter~0 (* 2 v_z_123)) 4294967296) 1) (forall ((v_y_123 Int)) (let ((.cse4 (* v_y_123 4294967296))) (or (< (+ 4294967295 v_z_123) .cse4) (< (+ .cse4 .cse5 .cse6) v_z_123)))))) (<= (* 4294967296 (div .cse7 4294967296)) c_~counter~0) (forall ((v_z_123 Int)) (or (forall ((v_y_123 Int)) (let ((.cse8 (* v_y_123 4294967296))) (or (< (+ 4294967295 v_z_123) .cse8) (< (+ .cse8 .cse5 .cse6) v_z_123) (= .cse8 v_z_123)))) (< (mod (+ c_~counter~0 (* 2 v_z_123)) 4294967296) 1) (< .cse2 (+ c_~counter~0 v_z_123)) (< v_z_123 0))) (forall ((v_z_123 Int)) (or (forall ((v_y_123 Int)) (let ((.cse11 (* v_y_123 4294967296))) (or (forall ((v_y_121 Int)) (let ((.cse10 (* v_y_121 4294967296))) (let ((.cse9 (+ .cse10 .cse11))) (or (< .cse9 v_z_123) (= .cse9 v_z_123) (< .cse2 (+ .cse10 c_~counter~0)))))) (< (+ 4294967295 v_z_123) .cse11) (< .cse11 v_z_123)))) (< (mod (+ c_~counter~0 (* 2 v_z_123)) 4294967296) 1) (< .cse2 (+ c_~counter~0 v_z_123)) (< v_z_123 0)))))) is different from false [2023-11-29 00:07:54,838 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 5 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 1 not checked. [2023-11-29 00:07:54,838 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1237315359] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 00:07:54,838 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 00:07:54,838 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7, 6] total 12 [2023-11-29 00:07:54,838 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1387847786] [2023-11-29 00:07:54,839 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 00:07:54,839 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2023-11-29 00:07:54,839 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 00:07:54,840 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2023-11-29 00:07:54,840 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=87, Unknown=1, NotChecked=20, Total=156 [2023-11-29 00:07:54,849 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 22 [2023-11-29 00:07:54,850 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 564 places, 4141 transitions, 179589 flow. Second operand has 13 states, 13 states have (on average 7.230769230769231) internal successors, (94), 13 states have internal predecessors, (94), 0 states have call successors, (0), 0 states 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 00:07:54,850 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 00:07:54,850 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 22 [2023-11-29 00:07:54,850 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 00:08:42,047 INFO L124 PetriNetUnfolderBase]: 12705/22166 cut-off events. [2023-11-29 00:08:42,047 INFO L125 PetriNetUnfolderBase]: For 1755871/1755871 co-relation queries the response was YES. [2023-11-29 00:08:42,526 INFO L83 FinitePrefix]: Finished finitePrefix Result has 374601 conditions, 22166 events. 12705/22166 cut-off events. For 1755871/1755871 co-relation queries the response was YES. Maximal size of possible extension queue 1128. Compared 179232 event pairs, 335 based on Foata normal form. 11/22176 useless extension candidates. Maximal degree in co-relation 374405. Up to 8614 conditions per place. [2023-11-29 00:08:42,722 INFO L140 encePairwiseOnDemand]: 17/22 looper letters, 3432 selfloop transitions, 1001 changer transitions 456/5452 dead transitions. [2023-11-29 00:08:42,722 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 574 places, 5452 transitions, 246386 flow [2023-11-29 00:08:42,723 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2023-11-29 00:08:42,724 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2023-11-29 00:08:42,724 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 147 transitions. [2023-11-29 00:08:42,724 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6074380165289256 [2023-11-29 00:08:42,724 INFO L72 ComplementDD]: Start complementDD. Operand 11 states and 147 transitions. [2023-11-29 00:08:42,724 INFO L73 IsDeterministic]: Start isDeterministic. Operand 11 states and 147 transitions. [2023-11-29 00:08:42,724 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 00:08:42,724 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 11 states and 147 transitions. [2023-11-29 00:08:42,725 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 12 states, 11 states have (on average 13.363636363636363) internal successors, (147), 11 states have internal predecessors, (147), 0 states have call successors, (0), 0 states 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 00:08:42,725 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 12 states, 12 states have (on average 22.0) internal successors, (264), 12 states have internal predecessors, (264), 0 states have call successors, (0), 0 states 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 00:08:42,726 INFO L81 ComplementDD]: Finished complementDD. Result has 12 states, 12 states have (on average 22.0) internal successors, (264), 12 states have internal predecessors, (264), 0 states have call successors, (0), 0 states 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 00:08:42,726 INFO L175 Difference]: Start difference. First operand has 564 places, 4141 transitions, 179589 flow. Second operand 11 states and 147 transitions. [2023-11-29 00:08:42,726 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 574 places, 5452 transitions, 246386 flow [2023-11-29 00:09:52,278 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 565 places, 5452 transitions, 245580 flow, removed 330 selfloop flow, removed 9 redundant places. [2023-11-29 00:09:52,502 INFO L231 Difference]: Finished difference. Result has 572 places, 4353 transitions, 194796 flow [2023-11-29 00:09:52,506 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=22, PETRI_DIFFERENCE_MINUEND_FLOW=178839, PETRI_DIFFERENCE_MINUEND_PLACES=555, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=4141, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=631, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=3252, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=194796, PETRI_PLACES=572, PETRI_TRANSITIONS=4353} [2023-11-29 00:09:52,506 INFO L281 CegarLoopForPetriNet]: 24 programPoint places, 548 predicate places. [2023-11-29 00:09:52,507 INFO L495 AbstractCegarLoop]: Abstraction has has 572 places, 4353 transitions, 194796 flow [2023-11-29 00:09:52,507 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 7.230769230769231) internal successors, (94), 13 states have internal predecessors, (94), 0 states have call successors, (0), 0 states 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 00:09:52,507 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 00:09:52,507 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 00:09:52,512 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ab7c961-5a72-428b-8a60-70c6308b0128/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Ended with exit code 0 [2023-11-29 00:09:52,707 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ab7c961-5a72-428b-8a60-70c6308b0128/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 00:09:52,708 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 00:09:52,708 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 00:09:52,708 INFO L85 PathProgramCache]: Analyzing trace with hash 1857016357, now seen corresponding path program 18 times [2023-11-29 00:09:52,708 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 00:09:52,708 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [621085438] [2023-11-29 00:09:52,708 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 00:09:52,708 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 00:09:52,726 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 00:09:53,238 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 00:09:53,238 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 00:09:53,239 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [621085438] [2023-11-29 00:09:53,239 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [621085438] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 00:09:53,239 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1270694882] [2023-11-29 00:09:53,239 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-11-29 00:09:53,239 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 00:09:53,239 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ab7c961-5a72-428b-8a60-70c6308b0128/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 00:09:53,240 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ab7c961-5a72-428b-8a60-70c6308b0128/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 00:09:53,241 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ab7c961-5a72-428b-8a60-70c6308b0128/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2023-11-29 00:09:53,335 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2023-11-29 00:09:53,335 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-29 00:09:53,336 INFO L262 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 11 conjunts are in the unsatisfiable core [2023-11-29 00:09:53,338 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 00:09:53,572 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 5 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 00:09:53,572 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 00:09:54,068 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 7 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-29 00:09:54,068 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1270694882] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 00:09:54,068 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 00:09:54,068 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 5, 7] total 19 [2023-11-29 00:09:54,068 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1388131461] [2023-11-29 00:09:54,069 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 00:09:54,069 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2023-11-29 00:09:54,069 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 00:09:54,070 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2023-11-29 00:09:54,070 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=302, Unknown=0, NotChecked=0, Total=380 [2023-11-29 00:09:54,088 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 22 [2023-11-29 00:09:54,088 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 572 places, 4353 transitions, 194796 flow. Second operand has 20 states, 20 states have (on average 6.1) internal successors, (122), 20 states have internal predecessors, (122), 0 states have call successors, (0), 0 states 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 00:09:54,088 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 00:09:54,088 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 22 [2023-11-29 00:09:54,088 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 00:11:01,208 INFO L124 PetriNetUnfolderBase]: 13052/22460 cut-off events. [2023-11-29 00:11:01,209 INFO L125 PetriNetUnfolderBase]: For 1756997/1756997 co-relation queries the response was YES. [2023-11-29 00:11:01,768 INFO L83 FinitePrefix]: Finished finitePrefix Result has 375113 conditions, 22460 events. 13052/22460 cut-off events. For 1756997/1756997 co-relation queries the response was YES. Maximal size of possible extension queue 1149. Compared 178107 event pairs, 140 based on Foata normal form. 77/22537 useless extension candidates. Maximal degree in co-relation 374912. Up to 10688 conditions per place. [2023-11-29 00:11:01,984 INFO L140 encePairwiseOnDemand]: 12/22 looper letters, 2813 selfloop transitions, 2104 changer transitions 101/5019 dead transitions. [2023-11-29 00:11:01,984 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 599 places, 5019 transitions, 228162 flow [2023-11-29 00:11:01,985 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2023-11-29 00:11:01,985 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2023-11-29 00:11:01,986 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 275 transitions. [2023-11-29 00:11:01,986 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44642857142857145 [2023-11-29 00:11:01,986 INFO L72 ComplementDD]: Start complementDD. Operand 28 states and 275 transitions. [2023-11-29 00:11:01,986 INFO L73 IsDeterministic]: Start isDeterministic. Operand 28 states and 275 transitions. [2023-11-29 00:11:01,986 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 00:11:01,986 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 28 states and 275 transitions. [2023-11-29 00:11:01,987 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 29 states, 28 states have (on average 9.821428571428571) internal successors, (275), 28 states have internal predecessors, (275), 0 states have call successors, (0), 0 states 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 00:11:01,988 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 29 states, 29 states have (on average 22.0) internal successors, (638), 29 states have internal predecessors, (638), 0 states have call successors, (0), 0 states 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 00:11:01,989 INFO L81 ComplementDD]: Finished complementDD. Result has 29 states, 29 states have (on average 22.0) internal successors, (638), 29 states have internal predecessors, (638), 0 states have call successors, (0), 0 states 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 00:11:01,989 INFO L175 Difference]: Start difference. First operand has 572 places, 4353 transitions, 194796 flow. Second operand 28 states and 275 transitions. [2023-11-29 00:11:01,989 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 599 places, 5019 transitions, 228162 flow [2023-11-29 00:12:06,163 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 589 places, 5019 transitions, 226486 flow, removed 111 selfloop flow, removed 10 redundant places. [2023-11-29 00:12:06,399 INFO L231 Difference]: Finished difference. Result has 602 places, 4478 transitions, 207503 flow [2023-11-29 00:12:06,403 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=22, PETRI_DIFFERENCE_MINUEND_FLOW=193085, PETRI_DIFFERENCE_MINUEND_PLACES=562, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=4343, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1966, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=2291, PETRI_DIFFERENCE_SUBTRAHEND_STATES=28, PETRI_FLOW=207503, PETRI_PLACES=602, PETRI_TRANSITIONS=4478} [2023-11-29 00:12:06,403 INFO L281 CegarLoopForPetriNet]: 24 programPoint places, 578 predicate places. [2023-11-29 00:12:06,404 INFO L495 AbstractCegarLoop]: Abstraction has has 602 places, 4478 transitions, 207503 flow [2023-11-29 00:12:06,404 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 6.1) internal successors, (122), 20 states have internal predecessors, (122), 0 states have call successors, (0), 0 states 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 00:12:06,404 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 00:12:06,404 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 00:12:06,411 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ab7c961-5a72-428b-8a60-70c6308b0128/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Ended with exit code 0 [2023-11-29 00:12:06,604 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,19 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ab7c961-5a72-428b-8a60-70c6308b0128/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 00:12:06,605 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 00:12:06,605 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 00:12:06,605 INFO L85 PathProgramCache]: Analyzing trace with hash 1205388809, now seen corresponding path program 19 times [2023-11-29 00:12:06,605 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 00:12:06,605 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1868245479] [2023-11-29 00:12:06,605 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 00:12:06,606 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 00:12:06,626 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 00:12:07,131 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 00:12:07,131 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 00:12:07,131 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1868245479] [2023-11-29 00:12:07,131 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1868245479] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 00:12:07,131 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2008434116] [2023-11-29 00:12:07,131 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-11-29 00:12:07,131 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 00:12:07,132 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ab7c961-5a72-428b-8a60-70c6308b0128/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 00:12:07,133 INFO L229 MonitoredProcess]: Starting monitored process 20 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ab7c961-5a72-428b-8a60-70c6308b0128/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 00:12:07,140 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ab7c961-5a72-428b-8a60-70c6308b0128/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2023-11-29 00:12:07,234 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 00:12:07,236 INFO L262 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 11 conjunts are in the unsatisfiable core [2023-11-29 00:12:07,238 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 00:12:07,516 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 00:12:07,516 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 00:12:07,954 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 00:12:07,954 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2008434116] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 00:12:07,954 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 00:12:07,955 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8, 8] total 20 [2023-11-29 00:12:07,955 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1362037928] [2023-11-29 00:12:07,955 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 00:12:07,955 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2023-11-29 00:12:07,956 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 00:12:07,956 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2023-11-29 00:12:07,956 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=87, Invalid=333, Unknown=0, NotChecked=0, Total=420 [2023-11-29 00:12:07,985 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 22 [2023-11-29 00:12:07,986 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 602 places, 4478 transitions, 207503 flow. Second operand has 21 states, 21 states have (on average 5.333333333333333) internal successors, (112), 21 states have internal predecessors, (112), 0 states have call successors, (0), 0 states 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 00:12:07,986 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 00:12:07,986 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 22 [2023-11-29 00:12:07,986 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 00:13:09,824 INFO L124 PetriNetUnfolderBase]: 13126/22549 cut-off events. [2023-11-29 00:13:09,824 INFO L125 PetriNetUnfolderBase]: For 1956243/1956243 co-relation queries the response was YES. [2023-11-29 00:13:10,376 INFO L83 FinitePrefix]: Finished finitePrefix Result has 390721 conditions, 22549 events. 13126/22549 cut-off events. For 1956243/1956243 co-relation queries the response was YES. Maximal size of possible extension queue 1143. Compared 178422 event pairs, 62 based on Foata normal form. 118/22667 useless extension candidates. Maximal degree in co-relation 390513. Up to 8957 conditions per place. [2023-11-29 00:13:10,714 INFO L140 encePairwiseOnDemand]: 13/22 looper letters, 2465 selfloop transitions, 2509 changer transitions 61/5036 dead transitions. [2023-11-29 00:13:10,714 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 632 places, 5036 transitions, 236417 flow [2023-11-29 00:13:10,715 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2023-11-29 00:13:10,715 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 33 states. [2023-11-29 00:13:10,715 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 298 transitions. [2023-11-29 00:13:10,716 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41046831955922863 [2023-11-29 00:13:10,716 INFO L72 ComplementDD]: Start complementDD. Operand 33 states and 298 transitions. [2023-11-29 00:13:10,716 INFO L73 IsDeterministic]: Start isDeterministic. Operand 33 states and 298 transitions. [2023-11-29 00:13:10,716 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 00:13:10,716 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 33 states and 298 transitions. [2023-11-29 00:13:10,718 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 34 states, 33 states have (on average 9.030303030303031) internal successors, (298), 33 states have internal predecessors, (298), 0 states have call successors, (0), 0 states 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 00:13:10,719 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 34 states, 34 states have (on average 22.0) internal successors, (748), 34 states have internal predecessors, (748), 0 states have call successors, (0), 0 states 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 00:13:10,720 INFO L81 ComplementDD]: Finished complementDD. Result has 34 states, 34 states have (on average 22.0) internal successors, (748), 34 states have internal predecessors, (748), 0 states have call successors, (0), 0 states 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 00:13:10,720 INFO L175 Difference]: Start difference. First operand has 602 places, 4478 transitions, 207503 flow. Second operand 33 states and 298 transitions. [2023-11-29 00:13:10,720 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 632 places, 5036 transitions, 236417 flow [2023-11-29 00:14:20,805 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 620 places, 5036 transitions, 235759 flow, removed 197 selfloop flow, removed 12 redundant places. [2023-11-29 00:14:21,013 INFO L231 Difference]: Finished difference. Result has 630 places, 4527 transitions, 218968 flow [2023-11-29 00:14:21,016 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=22, PETRI_DIFFERENCE_MINUEND_FLOW=205622, PETRI_DIFFERENCE_MINUEND_PLACES=588, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=4435, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2418, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=1952, PETRI_DIFFERENCE_SUBTRAHEND_STATES=33, PETRI_FLOW=218968, PETRI_PLACES=630, PETRI_TRANSITIONS=4527} [2023-11-29 00:14:21,016 INFO L281 CegarLoopForPetriNet]: 24 programPoint places, 606 predicate places. [2023-11-29 00:14:21,017 INFO L495 AbstractCegarLoop]: Abstraction has has 630 places, 4527 transitions, 218968 flow [2023-11-29 00:14:21,017 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 5.333333333333333) internal successors, (112), 21 states have internal predecessors, (112), 0 states have call successors, (0), 0 states 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 00:14:21,017 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 00:14:21,017 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 00:14:21,022 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ab7c961-5a72-428b-8a60-70c6308b0128/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Ended with exit code 0 [2023-11-29 00:14:21,217 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,20 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ab7c961-5a72-428b-8a60-70c6308b0128/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 00:14:21,218 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 00:14:21,218 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 00:14:21,219 INFO L85 PathProgramCache]: Analyzing trace with hash -886142587, now seen corresponding path program 20 times [2023-11-29 00:14:21,219 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 00:14:21,219 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [301726041] [2023-11-29 00:14:21,219 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 00:14:21,219 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 00:14:21,231 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 00:14:21,453 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 00:14:21,453 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 00:14:21,453 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [301726041] [2023-11-29 00:14:21,454 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [301726041] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 00:14:21,454 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [891112740] [2023-11-29 00:14:21,454 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-29 00:14:21,454 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 00:14:21,454 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ab7c961-5a72-428b-8a60-70c6308b0128/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 00:14:21,455 INFO L229 MonitoredProcess]: Starting monitored process 21 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ab7c961-5a72-428b-8a60-70c6308b0128/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 00:14:21,464 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ab7c961-5a72-428b-8a60-70c6308b0128/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2023-11-29 00:14:21,551 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-11-29 00:14:21,551 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-29 00:14:21,552 INFO L262 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 14 conjunts are in the unsatisfiable core [2023-11-29 00:14:21,553 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 00:14:21,726 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 00:14:21,726 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 00:14:22,233 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 5 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 00:14:22,233 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [891112740] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 00:14:22,233 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 00:14:22,233 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 9] total 18 [2023-11-29 00:14:22,234 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1020644847] [2023-11-29 00:14:22,234 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 00:14:22,234 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2023-11-29 00:14:22,234 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 00:14:22,234 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2023-11-29 00:14:22,235 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=91, Invalid=251, Unknown=0, NotChecked=0, Total=342 [2023-11-29 00:14:22,243 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 22 [2023-11-29 00:14:22,243 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 630 places, 4527 transitions, 218968 flow. Second operand has 19 states, 19 states have (on average 5.2105263157894735) internal successors, (99), 19 states have internal predecessors, (99), 0 states have call successors, (0), 0 states 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 00:14:22,243 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 00:14:22,243 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 22 [2023-11-29 00:14:22,243 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 00:15:17,170 INFO L124 PetriNetUnfolderBase]: 13248/22720 cut-off events. [2023-11-29 00:15:17,171 INFO L125 PetriNetUnfolderBase]: For 2150590/2150590 co-relation queries the response was YES. [2023-11-29 00:15:17,632 INFO L83 FinitePrefix]: Finished finitePrefix Result has 409222 conditions, 22720 events. 13248/22720 cut-off events. For 2150590/2150590 co-relation queries the response was YES. Maximal size of possible extension queue 1125. Compared 179578 event pairs, 74 based on Foata normal form. 16/22736 useless extension candidates. Maximal degree in co-relation 409008. Up to 15943 conditions per place. [2023-11-29 00:15:17,825 INFO L140 encePairwiseOnDemand]: 12/22 looper letters, 2505 selfloop transitions, 2229 changer transitions 8/4743 dead transitions. [2023-11-29 00:15:17,826 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 649 places, 4743 transitions, 235889 flow [2023-11-29 00:15:17,826 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2023-11-29 00:15:17,826 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2023-11-29 00:15:17,827 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 161 transitions. [2023-11-29 00:15:17,827 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3659090909090909 [2023-11-29 00:15:17,827 INFO L72 ComplementDD]: Start complementDD. Operand 20 states and 161 transitions. [2023-11-29 00:15:17,827 INFO L73 IsDeterministic]: Start isDeterministic. Operand 20 states and 161 transitions. [2023-11-29 00:15:17,827 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 00:15:17,828 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 20 states and 161 transitions. [2023-11-29 00:15:17,828 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 21 states, 20 states have (on average 8.05) internal successors, (161), 20 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 00:15:17,829 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 21 states, 21 states have (on average 22.0) internal successors, (462), 21 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 00:15:17,829 INFO L81 ComplementDD]: Finished complementDD. Result has 21 states, 21 states have (on average 22.0) internal successors, (462), 21 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 00:15:17,829 INFO L175 Difference]: Start difference. First operand has 630 places, 4527 transitions, 218968 flow. Second operand 20 states and 161 transitions. [2023-11-29 00:15:17,829 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 649 places, 4743 transitions, 235889 flow