./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/weaver/unroll-cond-3.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_4bf5264f-ca7e-4100-a5c1-5c220218f14d/bin/uautomizer-verify-BQ2R08f2Ya/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4bf5264f-ca7e-4100-a5c1-5c220218f14d/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_4bf5264f-ca7e-4100-a5c1-5c220218f14d/bin/uautomizer-verify-BQ2R08f2Ya/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4bf5264f-ca7e-4100-a5c1-5c220218f14d/bin/uautomizer-verify-BQ2R08f2Ya/config/AutomizerReach.xml -i ../../sv-benchmarks/c/weaver/unroll-cond-3.wvr.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4bf5264f-ca7e-4100-a5c1-5c220218f14d/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_4bf5264f-ca7e-4100-a5c1-5c220218f14d/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 9fb4c28a8a216c266c6ae14d377c8e26c68bb16bf7c2fe2809f039d12d6c4b55 --- Real Ultimate output --- This is Ultimate 0.2.4-dev-0e0057c [2023-11-29 06:35:08,656 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-11-29 06:35:08,737 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4bf5264f-ca7e-4100-a5c1-5c220218f14d/bin/uautomizer-verify-BQ2R08f2Ya/config/svcomp-Reach-32bit-Automizer_Default.epf [2023-11-29 06:35:08,742 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-11-29 06:35:08,742 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-11-29 06:35:08,787 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-11-29 06:35:08,787 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-11-29 06:35:08,788 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-11-29 06:35:08,789 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2023-11-29 06:35:08,789 INFO L153 SettingsManager]: * Use memory slicer=true [2023-11-29 06:35:08,790 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-11-29 06:35:08,790 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-11-29 06:35:08,791 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-11-29 06:35:08,792 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-11-29 06:35:08,792 INFO L153 SettingsManager]: * Use SBE=true [2023-11-29 06:35:08,793 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-11-29 06:35:08,793 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-11-29 06:35:08,794 INFO L153 SettingsManager]: * sizeof long=4 [2023-11-29 06:35:08,794 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-11-29 06:35:08,794 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-11-29 06:35:08,795 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-11-29 06:35:08,795 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-11-29 06:35:08,796 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-11-29 06:35:08,796 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-11-29 06:35:08,797 INFO L153 SettingsManager]: * sizeof long double=12 [2023-11-29 06:35:08,797 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-11-29 06:35:08,797 INFO L153 SettingsManager]: * Use constant arrays=true [2023-11-29 06:35:08,798 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-11-29 06:35:08,798 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-11-29 06:35:08,799 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2023-11-29 06:35:08,799 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-11-29 06:35:08,799 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2023-11-29 06:35:08,800 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-11-29 06:35:08,800 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-11-29 06:35:08,800 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2023-11-29 06:35:08,800 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-11-29 06:35:08,800 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-11-29 06:35:08,801 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2023-11-29 06:35:08,801 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-11-29 06:35:08,801 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-11-29 06:35:08,801 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-11-29 06:35:08,802 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-11-29 06:35:08,802 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_4bf5264f-ca7e-4100-a5c1-5c220218f14d/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4bf5264f-ca7e-4100-a5c1-5c220218f14d/bin/uautomizer-verify-BQ2R08f2Ya Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 9fb4c28a8a216c266c6ae14d377c8e26c68bb16bf7c2fe2809f039d12d6c4b55 [2023-11-29 06:35:09,021 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-11-29 06:35:09,062 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-11-29 06:35:09,065 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-11-29 06:35:09,066 INFO L270 PluginConnector]: Initializing CDTParser... [2023-11-29 06:35:09,067 INFO L274 PluginConnector]: CDTParser initialized [2023-11-29 06:35:09,068 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4bf5264f-ca7e-4100-a5c1-5c220218f14d/bin/uautomizer-verify-BQ2R08f2Ya/../../sv-benchmarks/c/weaver/unroll-cond-3.wvr.c [2023-11-29 06:35:11,722 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-11-29 06:35:11,932 INFO L384 CDTParser]: Found 1 translation units. [2023-11-29 06:35:11,933 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4bf5264f-ca7e-4100-a5c1-5c220218f14d/sv-benchmarks/c/weaver/unroll-cond-3.wvr.c [2023-11-29 06:35:11,941 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4bf5264f-ca7e-4100-a5c1-5c220218f14d/bin/uautomizer-verify-BQ2R08f2Ya/data/c5a07431f/d900cb07c34f45dc859a6836db239bfc/FLAGd833e5e12 [2023-11-29 06:35:11,957 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4bf5264f-ca7e-4100-a5c1-5c220218f14d/bin/uautomizer-verify-BQ2R08f2Ya/data/c5a07431f/d900cb07c34f45dc859a6836db239bfc [2023-11-29 06:35:11,960 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-11-29 06:35:11,962 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2023-11-29 06:35:11,963 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-11-29 06:35:11,963 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-11-29 06:35:11,969 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-11-29 06:35:11,970 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 29.11 06:35:11" (1/1) ... [2023-11-29 06:35:11,971 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@6f5dc68b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 06:35:11, skipping insertion in model container [2023-11-29 06:35:11,972 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 29.11 06:35:11" (1/1) ... [2023-11-29 06:35:11,999 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-11-29 06:35:12,192 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_4bf5264f-ca7e-4100-a5c1-5c220218f14d/sv-benchmarks/c/weaver/unroll-cond-3.wvr.c[2667,2680] [2023-11-29 06:35:12,203 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-29 06:35:12,214 INFO L202 MainTranslator]: Completed pre-run [2023-11-29 06:35:12,241 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_4bf5264f-ca7e-4100-a5c1-5c220218f14d/sv-benchmarks/c/weaver/unroll-cond-3.wvr.c[2667,2680] [2023-11-29 06:35:12,244 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-29 06:35:12,262 INFO L206 MainTranslator]: Completed translation [2023-11-29 06:35:12,262 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 06:35:12 WrapperNode [2023-11-29 06:35:12,262 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-11-29 06:35:12,264 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-11-29 06:35:12,264 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-11-29 06:35:12,264 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-11-29 06:35:12,272 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 06:35:12" (1/1) ... [2023-11-29 06:35:12,282 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 06:35:12" (1/1) ... [2023-11-29 06:35:12,312 INFO L138 Inliner]: procedures = 24, calls = 37, calls flagged for inlining = 13, calls inlined = 13, statements flattened = 167 [2023-11-29 06:35:12,313 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-11-29 06:35:12,313 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-11-29 06:35:12,314 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-11-29 06:35:12,314 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-11-29 06:35:12,327 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 06:35:12" (1/1) ... [2023-11-29 06:35:12,327 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 06:35:12" (1/1) ... [2023-11-29 06:35:12,331 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 06:35:12" (1/1) ... [2023-11-29 06:35:12,349 INFO L175 MemorySlicer]: Split 13 memory accesses to 4 slices as follows [2, 2, 7, 2]. 54 percent of accesses are in the largest equivalence class. The 2 initializations are split as follows [2, 0, 0, 0]. The 3 writes are split as follows [0, 1, 1, 1]. [2023-11-29 06:35:12,350 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 06:35:12" (1/1) ... [2023-11-29 06:35:12,350 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 06:35:12" (1/1) ... [2023-11-29 06:35:12,359 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 06:35:12" (1/1) ... [2023-11-29 06:35:12,363 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 06:35:12" (1/1) ... [2023-11-29 06:35:12,366 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 06:35:12" (1/1) ... [2023-11-29 06:35:12,368 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 06:35:12" (1/1) ... [2023-11-29 06:35:12,371 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-11-29 06:35:12,372 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-11-29 06:35:12,373 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-11-29 06:35:12,373 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-11-29 06:35:12,374 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 06:35:12" (1/1) ... [2023-11-29 06:35:12,380 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2023-11-29 06:35:12,392 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4bf5264f-ca7e-4100-a5c1-5c220218f14d/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 06:35:12,405 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4bf5264f-ca7e-4100-a5c1-5c220218f14d/bin/uautomizer-verify-BQ2R08f2Ya/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (exit command is (exit), workingDir is null) [2023-11-29 06:35:12,416 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4bf5264f-ca7e-4100-a5c1-5c220218f14d/bin/uautomizer-verify-BQ2R08f2Ya/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Waiting until timeout for monitored process [2023-11-29 06:35:12,447 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-11-29 06:35:12,447 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2023-11-29 06:35:12,447 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2023-11-29 06:35:12,447 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2023-11-29 06:35:12,447 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2023-11-29 06:35:12,448 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2023-11-29 06:35:12,448 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#1 [2023-11-29 06:35:12,448 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#2 [2023-11-29 06:35:12,448 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#3 [2023-11-29 06:35:12,448 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-11-29 06:35:12,449 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#0 [2023-11-29 06:35:12,449 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#1 [2023-11-29 06:35:12,449 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#2 [2023-11-29 06:35:12,449 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#3 [2023-11-29 06:35:12,449 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2023-11-29 06:35:12,450 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-11-29 06:35:12,450 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-11-29 06:35:12,450 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#0 [2023-11-29 06:35:12,450 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#1 [2023-11-29 06:35:12,450 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#2 [2023-11-29 06:35:12,451 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#3 [2023-11-29 06:35:12,451 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-11-29 06:35:12,453 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 06:35:12,553 INFO L241 CfgBuilder]: Building ICFG [2023-11-29 06:35:12,555 INFO L267 CfgBuilder]: Building CFG for each procedure with an implementation [2023-11-29 06:35:12,823 INFO L282 CfgBuilder]: Performing block encoding [2023-11-29 06:35:13,102 INFO L304 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-11-29 06:35:13,102 INFO L309 CfgBuilder]: Removed 3 assume(true) statements. [2023-11-29 06:35:13,102 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 29.11 06:35:13 BoogieIcfgContainer [2023-11-29 06:35:13,102 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-11-29 06:35:13,105 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-11-29 06:35:13,105 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-11-29 06:35:13,107 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-11-29 06:35:13,108 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 29.11 06:35:11" (1/3) ... [2023-11-29 06:35:13,108 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@564c466 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 29.11 06:35:13, skipping insertion in model container [2023-11-29 06:35:13,108 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 06:35:12" (2/3) ... [2023-11-29 06:35:13,109 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@564c466 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 29.11 06:35:13, skipping insertion in model container [2023-11-29 06:35:13,109 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 29.11 06:35:13" (3/3) ... [2023-11-29 06:35:13,110 INFO L112 eAbstractionObserver]: Analyzing ICFG unroll-cond-3.wvr.c [2023-11-29 06:35:13,118 WARN L145 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2023-11-29 06:35:13,127 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-11-29 06:35:13,127 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-11-29 06:35:13,127 INFO L514 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-11-29 06:35:13,172 INFO L144 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2023-11-29 06:35:13,199 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 25 places, 21 transitions, 56 flow [2023-11-29 06:35:13,223 INFO L124 PetriNetUnfolderBase]: 3/19 cut-off events. [2023-11-29 06:35:13,223 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2023-11-29 06:35:13,226 INFO L83 FinitePrefix]: Finished finitePrefix Result has 28 conditions, 19 events. 3/19 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 3. Compared 12 event pairs, 0 based on Foata normal form. 0/15 useless extension candidates. Maximal degree in co-relation 11. Up to 2 conditions per place. [2023-11-29 06:35:13,226 INFO L82 GeneralOperation]: Start removeDead. Operand has 25 places, 21 transitions, 56 flow [2023-11-29 06:35:13,229 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 22 places, 18 transitions, 48 flow [2023-11-29 06:35:13,240 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-29 06:35:13,246 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;@178948bb, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-11-29 06:35:13,246 INFO L358 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2023-11-29 06:35:13,256 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-11-29 06:35:13,256 INFO L124 PetriNetUnfolderBase]: 3/17 cut-off events. [2023-11-29 06:35:13,256 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2023-11-29 06:35:13,256 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 06:35:13,257 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 06:35:13,257 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 06:35:13,262 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 06:35:13,262 INFO L85 PathProgramCache]: Analyzing trace with hash -953264648, now seen corresponding path program 1 times [2023-11-29 06:35:13,270 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 06:35:13,271 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [427092327] [2023-11-29 06:35:13,271 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 06:35:13,271 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 06:35:13,403 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 06:35:13,631 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 06:35:13,631 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 06:35:13,632 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [427092327] [2023-11-29 06:35:13,632 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [427092327] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 06:35:13,632 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-29 06:35:13,632 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-29 06:35:13,634 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [507429324] [2023-11-29 06:35:13,634 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 06:35:13,642 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-29 06:35:13,647 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 06:35:13,667 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-29 06:35:13,668 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-29 06:35:13,669 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 21 [2023-11-29 06:35:13,671 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 22 places, 18 transitions, 48 flow. Second operand has 3 states, 3 states have (on average 7.666666666666667) internal successors, (23), 3 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 06:35:13,671 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 06:35:13,671 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 21 [2023-11-29 06:35:13,672 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 06:35:13,747 INFO L124 PetriNetUnfolderBase]: 41/77 cut-off events. [2023-11-29 06:35:13,747 INFO L125 PetriNetUnfolderBase]: For 8/8 co-relation queries the response was YES. [2023-11-29 06:35:13,748 INFO L83 FinitePrefix]: Finished finitePrefix Result has 169 conditions, 77 events. 41/77 cut-off events. For 8/8 co-relation queries the response was YES. Maximal size of possible extension queue 7. Compared 132 event pairs, 24 based on Foata normal form. 0/60 useless extension candidates. Maximal degree in co-relation 120. Up to 76 conditions per place. [2023-11-29 06:35:13,750 INFO L140 encePairwiseOnDemand]: 18/21 looper letters, 16 selfloop transitions, 2 changer transitions 0/19 dead transitions. [2023-11-29 06:35:13,750 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 24 places, 19 transitions, 86 flow [2023-11-29 06:35:13,752 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-29 06:35:13,754 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-29 06:35:13,761 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 28 transitions. [2023-11-29 06:35:13,763 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4444444444444444 [2023-11-29 06:35:13,764 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 28 transitions. [2023-11-29 06:35:13,764 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 28 transitions. [2023-11-29 06:35:13,765 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 06:35:13,768 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 28 transitions. [2023-11-29 06:35:13,769 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 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 06:35:13,772 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 21.0) internal successors, (84), 4 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 06:35:13,773 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 21.0) internal successors, (84), 4 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 06:35:13,774 INFO L175 Difference]: Start difference. First operand has 22 places, 18 transitions, 48 flow. Second operand 3 states and 28 transitions. [2023-11-29 06:35:13,776 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 24 places, 19 transitions, 86 flow [2023-11-29 06:35:13,778 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 20 places, 19 transitions, 78 flow, removed 0 selfloop flow, removed 4 redundant places. [2023-11-29 06:35:13,780 INFO L231 Difference]: Finished difference. Result has 21 places, 19 transitions, 52 flow [2023-11-29 06:35:13,782 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=21, PETRI_DIFFERENCE_MINUEND_FLOW=40, PETRI_DIFFERENCE_MINUEND_PLACES=18, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=18, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=16, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=52, PETRI_PLACES=21, PETRI_TRANSITIONS=19} [2023-11-29 06:35:13,786 INFO L281 CegarLoopForPetriNet]: 22 programPoint places, -1 predicate places. [2023-11-29 06:35:13,786 INFO L495 AbstractCegarLoop]: Abstraction has has 21 places, 19 transitions, 52 flow [2023-11-29 06:35:13,786 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 7.666666666666667) internal successors, (23), 3 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 06:35:13,786 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 06:35:13,787 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 06:35:13,787 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-11-29 06:35:13,787 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 06:35:13,788 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 06:35:13,788 INFO L85 PathProgramCache]: Analyzing trace with hash -1689825126, now seen corresponding path program 1 times [2023-11-29 06:35:13,788 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 06:35:13,789 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [960019522] [2023-11-29 06:35:13,789 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 06:35:13,789 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 06:35:13,850 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 06:35:14,214 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 06:35:14,215 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 06:35:14,215 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [960019522] [2023-11-29 06:35:14,215 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [960019522] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 06:35:14,215 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-29 06:35:14,216 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-11-29 06:35:14,216 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1395898296] [2023-11-29 06:35:14,216 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 06:35:14,217 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-11-29 06:35:14,218 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 06:35:14,218 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-11-29 06:35:14,219 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2023-11-29 06:35:14,219 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 21 [2023-11-29 06:35:14,219 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 21 places, 19 transitions, 52 flow. Second operand has 6 states, 6 states have (on average 5.5) internal successors, (33), 6 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 06:35:14,219 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 06:35:14,220 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 21 [2023-11-29 06:35:14,220 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 06:35:14,477 INFO L124 PetriNetUnfolderBase]: 75/133 cut-off events. [2023-11-29 06:35:14,477 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2023-11-29 06:35:14,478 INFO L83 FinitePrefix]: Finished finitePrefix Result has 280 conditions, 133 events. 75/133 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 13. Compared 342 event pairs, 1 based on Foata normal form. 0/102 useless extension candidates. Maximal degree in co-relation 269. Up to 89 conditions per place. [2023-11-29 06:35:14,480 INFO L140 encePairwiseOnDemand]: 14/21 looper letters, 33 selfloop transitions, 12 changer transitions 0/46 dead transitions. [2023-11-29 06:35:14,481 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 26 places, 46 transitions, 201 flow [2023-11-29 06:35:14,481 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-11-29 06:35:14,481 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-11-29 06:35:14,482 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 63 transitions. [2023-11-29 06:35:14,483 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5 [2023-11-29 06:35:14,483 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 63 transitions. [2023-11-29 06:35:14,483 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 63 transitions. [2023-11-29 06:35:14,484 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 06:35:14,484 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 63 transitions. [2023-11-29 06:35:14,485 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 10.5) internal successors, (63), 6 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 06:35:14,486 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 21.0) internal successors, (147), 7 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 06:35:14,486 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 21.0) internal successors, (147), 7 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 06:35:14,486 INFO L175 Difference]: Start difference. First operand has 21 places, 19 transitions, 52 flow. Second operand 6 states and 63 transitions. [2023-11-29 06:35:14,487 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 26 places, 46 transitions, 201 flow [2023-11-29 06:35:14,488 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 25 places, 46 transitions, 197 flow, removed 1 selfloop flow, removed 1 redundant places. [2023-11-29 06:35:14,489 INFO L231 Difference]: Finished difference. Result has 28 places, 30 transitions, 119 flow [2023-11-29 06:35:14,489 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=21, PETRI_DIFFERENCE_MINUEND_FLOW=48, PETRI_DIFFERENCE_MINUEND_PLACES=20, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=19, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=12, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=119, PETRI_PLACES=28, PETRI_TRANSITIONS=30} [2023-11-29 06:35:14,490 INFO L281 CegarLoopForPetriNet]: 22 programPoint places, 6 predicate places. [2023-11-29 06:35:14,490 INFO L495 AbstractCegarLoop]: Abstraction has has 28 places, 30 transitions, 119 flow [2023-11-29 06:35:14,491 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 5.5) internal successors, (33), 6 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 06:35:14,491 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 06:35:14,491 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 06:35:14,491 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-11-29 06:35:14,491 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 06:35:14,492 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 06:35:14,492 INFO L85 PathProgramCache]: Analyzing trace with hash 1465931414, now seen corresponding path program 2 times [2023-11-29 06:35:14,492 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 06:35:14,493 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [47193818] [2023-11-29 06:35:14,493 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 06:35:14,493 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 06:35:14,540 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 06:35:14,856 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 06:35:14,857 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 06:35:14,857 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [47193818] [2023-11-29 06:35:14,857 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [47193818] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 06:35:14,857 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-29 06:35:14,858 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-11-29 06:35:14,858 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1675566600] [2023-11-29 06:35:14,858 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 06:35:14,858 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-11-29 06:35:14,859 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 06:35:14,859 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-11-29 06:35:14,859 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2023-11-29 06:35:14,860 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 21 [2023-11-29 06:35:14,860 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 28 places, 30 transitions, 119 flow. Second operand has 6 states, 6 states have (on average 5.5) internal successors, (33), 6 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 06:35:14,860 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 06:35:14,860 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 21 [2023-11-29 06:35:14,860 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 06:35:15,044 INFO L124 PetriNetUnfolderBase]: 85/149 cut-off events. [2023-11-29 06:35:15,044 INFO L125 PetriNetUnfolderBase]: For 47/47 co-relation queries the response was YES. [2023-11-29 06:35:15,045 INFO L83 FinitePrefix]: Finished finitePrefix Result has 464 conditions, 149 events. 85/149 cut-off events. For 47/47 co-relation queries the response was YES. Maximal size of possible extension queue 14. Compared 382 event pairs, 6 based on Foata normal form. 0/122 useless extension candidates. Maximal degree in co-relation 445. Up to 99 conditions per place. [2023-11-29 06:35:15,047 INFO L140 encePairwiseOnDemand]: 14/21 looper letters, 32 selfloop transitions, 18 changer transitions 0/51 dead transitions. [2023-11-29 06:35:15,047 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 33 places, 51 transitions, 294 flow [2023-11-29 06:35:15,047 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-11-29 06:35:15,048 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-11-29 06:35:15,048 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 62 transitions. [2023-11-29 06:35:15,049 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.49206349206349204 [2023-11-29 06:35:15,049 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 62 transitions. [2023-11-29 06:35:15,049 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 62 transitions. [2023-11-29 06:35:15,049 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 06:35:15,049 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 62 transitions. [2023-11-29 06:35:15,050 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 10.333333333333334) internal successors, (62), 6 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 06:35:15,051 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 21.0) internal successors, (147), 7 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 06:35:15,051 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 21.0) internal successors, (147), 7 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 06:35:15,052 INFO L175 Difference]: Start difference. First operand has 28 places, 30 transitions, 119 flow. Second operand 6 states and 62 transitions. [2023-11-29 06:35:15,052 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 33 places, 51 transitions, 294 flow [2023-11-29 06:35:15,054 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 33 places, 51 transitions, 286 flow, removed 4 selfloop flow, removed 0 redundant places. [2023-11-29 06:35:15,055 INFO L231 Difference]: Finished difference. Result has 36 places, 38 transitions, 214 flow [2023-11-29 06:35:15,056 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=21, PETRI_DIFFERENCE_MINUEND_FLOW=115, PETRI_DIFFERENCE_MINUEND_PLACES=28, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=30, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=17, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=214, PETRI_PLACES=36, PETRI_TRANSITIONS=38} [2023-11-29 06:35:15,057 INFO L281 CegarLoopForPetriNet]: 22 programPoint places, 14 predicate places. [2023-11-29 06:35:15,057 INFO L495 AbstractCegarLoop]: Abstraction has has 36 places, 38 transitions, 214 flow [2023-11-29 06:35:15,057 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 5.5) internal successors, (33), 6 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 06:35:15,057 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 06:35:15,057 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 06:35:15,057 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-11-29 06:35:15,058 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 06:35:15,058 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 06:35:15,058 INFO L85 PathProgramCache]: Analyzing trace with hash -1638502336, now seen corresponding path program 3 times [2023-11-29 06:35:15,058 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 06:35:15,059 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [836098906] [2023-11-29 06:35:15,059 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 06:35:15,059 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 06:35:15,096 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 06:35:15,291 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 06:35:15,291 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 06:35:15,291 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [836098906] [2023-11-29 06:35:15,292 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [836098906] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 06:35:15,292 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-29 06:35:15,292 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-11-29 06:35:15,292 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [848340466] [2023-11-29 06:35:15,292 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 06:35:15,293 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-29 06:35:15,293 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 06:35:15,294 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-29 06:35:15,294 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-11-29 06:35:15,294 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 21 [2023-11-29 06:35:15,295 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 36 places, 38 transitions, 214 flow. Second operand has 5 states, 5 states have (on average 6.0) internal successors, (30), 5 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 06:35:15,295 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 06:35:15,295 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 21 [2023-11-29 06:35:15,295 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 06:35:15,454 INFO L124 PetriNetUnfolderBase]: 101/189 cut-off events. [2023-11-29 06:35:15,455 INFO L125 PetriNetUnfolderBase]: For 128/128 co-relation queries the response was YES. [2023-11-29 06:35:15,457 INFO L83 FinitePrefix]: Finished finitePrefix Result has 665 conditions, 189 events. 101/189 cut-off events. For 128/128 co-relation queries the response was YES. Maximal size of possible extension queue 18. Compared 552 event pairs, 23 based on Foata normal form. 0/152 useless extension candidates. Maximal degree in co-relation 641. Up to 88 conditions per place. [2023-11-29 06:35:15,459 INFO L140 encePairwiseOnDemand]: 15/21 looper letters, 44 selfloop transitions, 15 changer transitions 0/60 dead transitions. [2023-11-29 06:35:15,460 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 40 places, 60 transitions, 404 flow [2023-11-29 06:35:15,460 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-29 06:35:15,460 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-11-29 06:35:15,461 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 58 transitions. [2023-11-29 06:35:15,461 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5523809523809524 [2023-11-29 06:35:15,462 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 58 transitions. [2023-11-29 06:35:15,462 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 58 transitions. [2023-11-29 06:35:15,462 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 06:35:15,462 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 58 transitions. [2023-11-29 06:35:15,463 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 11.6) internal successors, (58), 5 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 06:35:15,464 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 21.0) internal successors, (126), 6 states have internal predecessors, (126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 06:35:15,464 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 21.0) internal successors, (126), 6 states have internal predecessors, (126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 06:35:15,465 INFO L175 Difference]: Start difference. First operand has 36 places, 38 transitions, 214 flow. Second operand 5 states and 58 transitions. [2023-11-29 06:35:15,465 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 40 places, 60 transitions, 404 flow [2023-11-29 06:35:15,469 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 39 places, 60 transitions, 380 flow, removed 5 selfloop flow, removed 1 redundant places. [2023-11-29 06:35:15,470 INFO L231 Difference]: Finished difference. Result has 41 places, 41 transitions, 256 flow [2023-11-29 06:35:15,471 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=21, PETRI_DIFFERENCE_MINUEND_FLOW=190, PETRI_DIFFERENCE_MINUEND_PLACES=35, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=38, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=13, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=24, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=256, PETRI_PLACES=41, PETRI_TRANSITIONS=41} [2023-11-29 06:35:15,472 INFO L281 CegarLoopForPetriNet]: 22 programPoint places, 19 predicate places. [2023-11-29 06:35:15,472 INFO L495 AbstractCegarLoop]: Abstraction has has 41 places, 41 transitions, 256 flow [2023-11-29 06:35:15,472 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 6.0) internal successors, (30), 5 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 06:35:15,472 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 06:35:15,473 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 06:35:15,473 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-11-29 06:35:15,473 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 06:35:15,474 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 06:35:15,474 INFO L85 PathProgramCache]: Analyzing trace with hash -773427632, now seen corresponding path program 4 times [2023-11-29 06:35:15,474 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 06:35:15,474 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2082390504] [2023-11-29 06:35:15,474 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 06:35:15,475 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 06:35:15,508 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 06:35:15,765 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 06:35:15,766 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 06:35:15,766 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2082390504] [2023-11-29 06:35:15,766 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2082390504] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 06:35:15,766 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-29 06:35:15,767 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-11-29 06:35:15,767 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [247689892] [2023-11-29 06:35:15,767 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 06:35:15,767 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-11-29 06:35:15,768 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 06:35:15,768 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-11-29 06:35:15,769 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2023-11-29 06:35:15,769 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 21 [2023-11-29 06:35:15,769 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 41 places, 41 transitions, 256 flow. Second operand has 6 states, 6 states have (on average 5.5) internal successors, (33), 6 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 06:35:15,769 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 06:35:15,769 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 21 [2023-11-29 06:35:15,770 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 06:35:15,931 INFO L124 PetriNetUnfolderBase]: 98/179 cut-off events. [2023-11-29 06:35:15,932 INFO L125 PetriNetUnfolderBase]: For 274/274 co-relation queries the response was YES. [2023-11-29 06:35:15,933 INFO L83 FinitePrefix]: Finished finitePrefix Result has 668 conditions, 179 events. 98/179 cut-off events. For 274/274 co-relation queries the response was YES. Maximal size of possible extension queue 18. Compared 505 event pairs, 9 based on Foata normal form. 4/168 useless extension candidates. Maximal degree in co-relation 642. Up to 128 conditions per place. [2023-11-29 06:35:15,934 INFO L140 encePairwiseOnDemand]: 14/21 looper letters, 36 selfloop transitions, 18 changer transitions 0/55 dead transitions. [2023-11-29 06:35:15,935 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 46 places, 55 transitions, 395 flow [2023-11-29 06:35:15,935 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-11-29 06:35:15,935 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-11-29 06:35:15,936 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 64 transitions. [2023-11-29 06:35:15,936 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5079365079365079 [2023-11-29 06:35:15,936 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 64 transitions. [2023-11-29 06:35:15,936 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 64 transitions. [2023-11-29 06:35:15,937 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 06:35:15,937 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 64 transitions. [2023-11-29 06:35:15,937 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 10.666666666666666) internal successors, (64), 6 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 06:35:15,938 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 21.0) internal successors, (147), 7 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 06:35:15,938 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 21.0) internal successors, (147), 7 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 06:35:15,939 INFO L175 Difference]: Start difference. First operand has 41 places, 41 transitions, 256 flow. Second operand 6 states and 64 transitions. [2023-11-29 06:35:15,939 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 46 places, 55 transitions, 395 flow [2023-11-29 06:35:15,942 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 46 places, 55 transitions, 391 flow, removed 2 selfloop flow, removed 0 redundant places. [2023-11-29 06:35:15,944 INFO L231 Difference]: Finished difference. Result has 47 places, 41 transitions, 295 flow [2023-11-29 06:35:15,944 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=21, PETRI_DIFFERENCE_MINUEND_FLOW=242, PETRI_DIFFERENCE_MINUEND_PLACES=41, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=40, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=17, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=22, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=295, PETRI_PLACES=47, PETRI_TRANSITIONS=41} [2023-11-29 06:35:15,945 INFO L281 CegarLoopForPetriNet]: 22 programPoint places, 25 predicate places. [2023-11-29 06:35:15,945 INFO L495 AbstractCegarLoop]: Abstraction has has 47 places, 41 transitions, 295 flow [2023-11-29 06:35:15,946 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 5.5) internal successors, (33), 6 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 06:35:15,946 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 06:35:15,946 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 06:35:15,946 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2023-11-29 06:35:15,947 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 06:35:15,947 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 06:35:15,947 INFO L85 PathProgramCache]: Analyzing trace with hash -385578062, now seen corresponding path program 5 times [2023-11-29 06:35:15,947 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 06:35:15,948 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [232663051] [2023-11-29 06:35:15,948 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 06:35:15,948 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 06:35:15,977 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 06:35:16,206 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 06:35:16,206 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 06:35:16,206 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [232663051] [2023-11-29 06:35:16,206 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [232663051] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 06:35:16,206 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-29 06:35:16,207 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-11-29 06:35:16,207 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1339031124] [2023-11-29 06:35:16,207 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 06:35:16,207 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-11-29 06:35:16,208 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 06:35:16,208 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-11-29 06:35:16,208 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2023-11-29 06:35:16,208 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 21 [2023-11-29 06:35:16,209 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 47 places, 41 transitions, 295 flow. Second operand has 6 states, 6 states have (on average 5.5) internal successors, (33), 6 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 06:35:16,209 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 06:35:16,209 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 21 [2023-11-29 06:35:16,209 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 06:35:16,338 INFO L124 PetriNetUnfolderBase]: 100/188 cut-off events. [2023-11-29 06:35:16,338 INFO L125 PetriNetUnfolderBase]: For 322/322 co-relation queries the response was YES. [2023-11-29 06:35:16,340 INFO L83 FinitePrefix]: Finished finitePrefix Result has 757 conditions, 188 events. 100/188 cut-off events. For 322/322 co-relation queries the response was YES. Maximal size of possible extension queue 19. Compared 563 event pairs, 8 based on Foata normal form. 1/174 useless extension candidates. Maximal degree in co-relation 728. Up to 125 conditions per place. [2023-11-29 06:35:16,341 INFO L140 encePairwiseOnDemand]: 13/21 looper letters, 34 selfloop transitions, 20 changer transitions 2/57 dead transitions. [2023-11-29 06:35:16,341 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 53 places, 57 transitions, 453 flow [2023-11-29 06:35:16,342 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-11-29 06:35:16,342 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2023-11-29 06:35:16,342 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 67 transitions. [2023-11-29 06:35:16,343 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4557823129251701 [2023-11-29 06:35:16,343 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 67 transitions. [2023-11-29 06:35:16,343 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 67 transitions. [2023-11-29 06:35:16,343 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 06:35:16,343 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 67 transitions. [2023-11-29 06:35:16,344 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 9.571428571428571) internal successors, (67), 7 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 06:35:16,345 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 21.0) internal successors, (168), 8 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 06:35:16,345 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 21.0) internal successors, (168), 8 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 06:35:16,345 INFO L175 Difference]: Start difference. First operand has 47 places, 41 transitions, 295 flow. Second operand 7 states and 67 transitions. [2023-11-29 06:35:16,346 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 53 places, 57 transitions, 453 flow [2023-11-29 06:35:16,349 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 50 places, 57 transitions, 426 flow, removed 1 selfloop flow, removed 3 redundant places. [2023-11-29 06:35:16,350 INFO L231 Difference]: Finished difference. Result has 52 places, 42 transitions, 329 flow [2023-11-29 06:35:16,350 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=21, PETRI_DIFFERENCE_MINUEND_FLOW=268, PETRI_DIFFERENCE_MINUEND_PLACES=44, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=41, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=19, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=21, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=329, PETRI_PLACES=52, PETRI_TRANSITIONS=42} [2023-11-29 06:35:16,351 INFO L281 CegarLoopForPetriNet]: 22 programPoint places, 30 predicate places. [2023-11-29 06:35:16,351 INFO L495 AbstractCegarLoop]: Abstraction has has 52 places, 42 transitions, 329 flow [2023-11-29 06:35:16,351 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 5.5) internal successors, (33), 6 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 06:35:16,351 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 06:35:16,352 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 06:35:16,352 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2023-11-29 06:35:16,352 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 06:35:16,352 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 06:35:16,352 INFO L85 PathProgramCache]: Analyzing trace with hash -409263640, now seen corresponding path program 6 times [2023-11-29 06:35:16,353 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 06:35:16,353 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2146826976] [2023-11-29 06:35:16,353 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 06:35:16,353 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 06:35:16,381 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 06:35:16,594 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 06:35:16,595 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 06:35:16,595 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2146826976] [2023-11-29 06:35:16,595 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2146826976] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 06:35:16,595 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-29 06:35:16,595 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-11-29 06:35:16,596 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1468360667] [2023-11-29 06:35:16,596 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 06:35:16,596 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-11-29 06:35:16,597 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 06:35:16,597 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-11-29 06:35:16,597 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2023-11-29 06:35:16,598 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 21 [2023-11-29 06:35:16,598 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 52 places, 42 transitions, 329 flow. Second operand has 6 states, 6 states have (on average 5.5) internal successors, (33), 6 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 06:35:16,598 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 06:35:16,598 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 21 [2023-11-29 06:35:16,598 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 06:35:16,784 INFO L124 PetriNetUnfolderBase]: 118/225 cut-off events. [2023-11-29 06:35:16,784 INFO L125 PetriNetUnfolderBase]: For 468/468 co-relation queries the response was YES. [2023-11-29 06:35:16,785 INFO L83 FinitePrefix]: Finished finitePrefix Result has 921 conditions, 225 events. 118/225 cut-off events. For 468/468 co-relation queries the response was YES. Maximal size of possible extension queue 21. Compared 741 event pairs, 4 based on Foata normal form. 1/205 useless extension candidates. Maximal degree in co-relation 890. Up to 93 conditions per place. [2023-11-29 06:35:16,787 INFO L140 encePairwiseOnDemand]: 13/21 looper letters, 39 selfloop transitions, 26 changer transitions 2/68 dead transitions. [2023-11-29 06:35:16,787 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 59 places, 68 transitions, 556 flow [2023-11-29 06:35:16,788 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-11-29 06:35:16,788 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2023-11-29 06:35:16,789 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 80 transitions. [2023-11-29 06:35:16,789 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.47619047619047616 [2023-11-29 06:35:16,789 INFO L72 ComplementDD]: Start complementDD. Operand 8 states and 80 transitions. [2023-11-29 06:35:16,789 INFO L73 IsDeterministic]: Start isDeterministic. Operand 8 states and 80 transitions. [2023-11-29 06:35:16,789 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 06:35:16,789 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 8 states and 80 transitions. [2023-11-29 06:35:16,790 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 06:35:16,791 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 9 states, 9 states have (on average 21.0) internal successors, (189), 9 states have internal predecessors, (189), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 06:35:16,791 INFO L81 ComplementDD]: Finished complementDD. Result has 9 states, 9 states have (on average 21.0) internal successors, (189), 9 states have internal predecessors, (189), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 06:35:16,791 INFO L175 Difference]: Start difference. First operand has 52 places, 42 transitions, 329 flow. Second operand 8 states and 80 transitions. [2023-11-29 06:35:16,791 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 59 places, 68 transitions, 556 flow [2023-11-29 06:35:16,796 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 50 places, 68 transitions, 464 flow, removed 10 selfloop flow, removed 9 redundant places. [2023-11-29 06:35:16,797 INFO L231 Difference]: Finished difference. Result has 54 places, 47 transitions, 370 flow [2023-11-29 06:35:16,797 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=21, PETRI_DIFFERENCE_MINUEND_FLOW=243, PETRI_DIFFERENCE_MINUEND_PLACES=43, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=42, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=21, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=17, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=370, PETRI_PLACES=54, PETRI_TRANSITIONS=47} [2023-11-29 06:35:16,798 INFO L281 CegarLoopForPetriNet]: 22 programPoint places, 32 predicate places. [2023-11-29 06:35:16,798 INFO L495 AbstractCegarLoop]: Abstraction has has 54 places, 47 transitions, 370 flow [2023-11-29 06:35:16,798 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 5.5) internal successors, (33), 6 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 06:35:16,799 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 06:35:16,799 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 06:35:16,799 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2023-11-29 06:35:16,799 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 06:35:16,799 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 06:35:16,799 INFO L85 PathProgramCache]: Analyzing trace with hash -494842561, now seen corresponding path program 1 times [2023-11-29 06:35:16,800 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 06:35:16,800 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1693983202] [2023-11-29 06:35:16,800 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 06:35:16,800 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 06:35:16,829 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 06:35:16,980 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-29 06:35:16,980 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 06:35:16,980 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1693983202] [2023-11-29 06:35:16,980 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1693983202] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 06:35:16,980 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1044131784] [2023-11-29 06:35:16,981 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 06:35:16,981 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 06:35:16,981 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4bf5264f-ca7e-4100-a5c1-5c220218f14d/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 06:35:16,984 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4bf5264f-ca7e-4100-a5c1-5c220218f14d/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 06:35:16,989 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4bf5264f-ca7e-4100-a5c1-5c220218f14d/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-11-29 06:35:17,103 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 06:35:17,106 INFO L262 TraceCheckSpWp]: Trace formula consists of 166 conjuncts, 35 conjunts are in the unsatisfiable core [2023-11-29 06:35:17,114 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 06:35:17,207 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2023-11-29 06:35:17,634 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2023-11-29 06:35:17,650 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 06:35:17,650 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 06:35:18,946 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 29 [2023-11-29 06:35:18,965 INFO L349 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2023-11-29 06:35:18,965 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 62 treesize of output 41 [2023-11-29 06:35:19,016 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 06:35:19,016 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1044131784] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 06:35:19,016 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 06:35:19,016 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 9, 9] total 21 [2023-11-29 06:35:19,017 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [154562519] [2023-11-29 06:35:19,017 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 06:35:19,017 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2023-11-29 06:35:19,018 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 06:35:19,018 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2023-11-29 06:35:19,019 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=341, Unknown=0, NotChecked=0, Total=420 [2023-11-29 06:35:19,019 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 21 [2023-11-29 06:35:19,019 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 54 places, 47 transitions, 370 flow. Second operand has 21 states, 21 states have (on average 5.190476190476191) internal successors, (109), 21 states have internal predecessors, (109), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 06:35:19,019 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 06:35:19,020 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 21 [2023-11-29 06:35:19,020 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 06:35:24,158 INFO L124 PetriNetUnfolderBase]: 471/890 cut-off events. [2023-11-29 06:35:24,158 INFO L125 PetriNetUnfolderBase]: For 1581/1581 co-relation queries the response was YES. [2023-11-29 06:35:24,162 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3654 conditions, 890 events. 471/890 cut-off events. For 1581/1581 co-relation queries the response was YES. Maximal size of possible extension queue 72. Compared 4449 event pairs, 20 based on Foata normal form. 6/794 useless extension candidates. Maximal degree in co-relation 3143. Up to 273 conditions per place. [2023-11-29 06:35:24,168 INFO L140 encePairwiseOnDemand]: 10/21 looper letters, 144 selfloop transitions, 91 changer transitions 51/287 dead transitions. [2023-11-29 06:35:24,169 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 91 places, 287 transitions, 2217 flow [2023-11-29 06:35:24,169 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2023-11-29 06:35:24,170 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 38 states. [2023-11-29 06:35:24,171 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 368 transitions. [2023-11-29 06:35:24,172 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46115288220551376 [2023-11-29 06:35:24,172 INFO L72 ComplementDD]: Start complementDD. Operand 38 states and 368 transitions. [2023-11-29 06:35:24,173 INFO L73 IsDeterministic]: Start isDeterministic. Operand 38 states and 368 transitions. [2023-11-29 06:35:24,173 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 06:35:24,174 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 38 states and 368 transitions. [2023-11-29 06:35:24,176 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 39 states, 38 states have (on average 9.68421052631579) internal successors, (368), 38 states have internal predecessors, (368), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 06:35:24,178 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 39 states, 39 states have (on average 21.0) internal successors, (819), 39 states have internal predecessors, (819), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 06:35:24,179 INFO L81 ComplementDD]: Finished complementDD. Result has 39 states, 39 states have (on average 21.0) internal successors, (819), 39 states have internal predecessors, (819), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 06:35:24,179 INFO L175 Difference]: Start difference. First operand has 54 places, 47 transitions, 370 flow. Second operand 38 states and 368 transitions. [2023-11-29 06:35:24,179 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 91 places, 287 transitions, 2217 flow [2023-11-29 06:35:24,192 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 85 places, 287 transitions, 2040 flow, removed 48 selfloop flow, removed 6 redundant places. [2023-11-29 06:35:24,198 INFO L231 Difference]: Finished difference. Result has 97 places, 128 transitions, 1205 flow [2023-11-29 06:35:24,199 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=21, PETRI_DIFFERENCE_MINUEND_FLOW=317, PETRI_DIFFERENCE_MINUEND_PLACES=48, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=47, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=27, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=16, PETRI_DIFFERENCE_SUBTRAHEND_STATES=38, PETRI_FLOW=1205, PETRI_PLACES=97, PETRI_TRANSITIONS=128} [2023-11-29 06:35:24,199 INFO L281 CegarLoopForPetriNet]: 22 programPoint places, 75 predicate places. [2023-11-29 06:35:24,200 INFO L495 AbstractCegarLoop]: Abstraction has has 97 places, 128 transitions, 1205 flow [2023-11-29 06:35:24,200 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 5.190476190476191) internal successors, (109), 21 states have internal predecessors, (109), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 06:35:24,200 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 06:35:24,200 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 06:35:24,207 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4bf5264f-ca7e-4100-a5c1-5c220218f14d/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2023-11-29 06:35:24,404 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4bf5264f-ca7e-4100-a5c1-5c220218f14d/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 06:35:24,405 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 06:35:24,405 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 06:35:24,405 INFO L85 PathProgramCache]: Analyzing trace with hash 1855231469, now seen corresponding path program 2 times [2023-11-29 06:35:24,405 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 06:35:24,405 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1893408671] [2023-11-29 06:35:24,406 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 06:35:24,406 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 06:35:24,429 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 06:35:24,582 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-29 06:35:24,582 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 06:35:24,583 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1893408671] [2023-11-29 06:35:24,583 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1893408671] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 06:35:24,583 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1549072628] [2023-11-29 06:35:24,583 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-29 06:35:24,584 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 06:35:24,584 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4bf5264f-ca7e-4100-a5c1-5c220218f14d/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 06:35:24,587 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4bf5264f-ca7e-4100-a5c1-5c220218f14d/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 06:35:24,589 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4bf5264f-ca7e-4100-a5c1-5c220218f14d/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-11-29 06:35:24,702 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-11-29 06:35:24,702 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-29 06:35:24,704 INFO L262 TraceCheckSpWp]: Trace formula consists of 166 conjuncts, 32 conjunts are in the unsatisfiable core [2023-11-29 06:35:24,707 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 06:35:24,737 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2023-11-29 06:35:24,993 INFO L349 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2023-11-29 06:35:24,994 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 115 treesize of output 104 [2023-11-29 06:35:25,071 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 06:35:25,071 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 06:35:26,412 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 87 treesize of output 77 [2023-11-29 06:35:26,453 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-29 06:35:26,453 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 5 new quantified variables, introduced 6 case distinctions, treesize of input 216 treesize of output 188 [2023-11-29 06:35:27,639 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 29 [2023-11-29 06:35:27,646 INFO L349 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2023-11-29 06:35:27,646 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 62 treesize of output 1 [2023-11-29 06:35:27,676 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 06:35:27,676 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1549072628] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 06:35:27,677 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 06:35:27,677 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 8, 8] total 19 [2023-11-29 06:35:27,677 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [649034038] [2023-11-29 06:35:27,677 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 06:35:27,677 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2023-11-29 06:35:27,678 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 06:35:27,678 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2023-11-29 06:35:27,679 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=275, Unknown=0, NotChecked=0, Total=342 [2023-11-29 06:35:27,679 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 21 [2023-11-29 06:35:27,679 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 97 places, 128 transitions, 1205 flow. Second operand has 19 states, 19 states have (on average 5.368421052631579) internal successors, (102), 19 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 06:35:27,679 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 06:35:27,679 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 21 [2023-11-29 06:35:27,680 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 06:35:31,479 INFO L124 PetriNetUnfolderBase]: 635/1223 cut-off events. [2023-11-29 06:35:31,479 INFO L125 PetriNetUnfolderBase]: For 2774/2774 co-relation queries the response was YES. [2023-11-29 06:35:31,483 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5770 conditions, 1223 events. 635/1223 cut-off events. For 2774/2774 co-relation queries the response was YES. Maximal size of possible extension queue 97. Compared 6699 event pairs, 19 based on Foata normal form. 9/1080 useless extension candidates. Maximal degree in co-relation 5574. Up to 538 conditions per place. [2023-11-29 06:35:31,489 INFO L140 encePairwiseOnDemand]: 11/21 looper letters, 157 selfloop transitions, 131 changer transitions 35/324 dead transitions. [2023-11-29 06:35:31,489 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 122 places, 324 transitions, 3195 flow [2023-11-29 06:35:31,490 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2023-11-29 06:35:31,490 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2023-11-29 06:35:31,491 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 276 transitions. [2023-11-29 06:35:31,491 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4380952380952381 [2023-11-29 06:35:31,491 INFO L72 ComplementDD]: Start complementDD. Operand 30 states and 276 transitions. [2023-11-29 06:35:31,491 INFO L73 IsDeterministic]: Start isDeterministic. Operand 30 states and 276 transitions. [2023-11-29 06:35:31,492 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 06:35:31,492 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 30 states and 276 transitions. [2023-11-29 06:35:31,493 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 31 states, 30 states have (on average 9.2) internal successors, (276), 30 states have internal predecessors, (276), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 06:35:31,495 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 31 states, 31 states have (on average 21.0) internal successors, (651), 31 states have internal predecessors, (651), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 06:35:31,495 INFO L81 ComplementDD]: Finished complementDD. Result has 31 states, 31 states have (on average 21.0) internal successors, (651), 31 states have internal predecessors, (651), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 06:35:31,495 INFO L175 Difference]: Start difference. First operand has 97 places, 128 transitions, 1205 flow. Second operand 30 states and 276 transitions. [2023-11-29 06:35:31,495 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 122 places, 324 transitions, 3195 flow [2023-11-29 06:35:31,527 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 115 places, 324 transitions, 2520 flow, removed 306 selfloop flow, removed 7 redundant places. [2023-11-29 06:35:31,533 INFO L231 Difference]: Finished difference. Result has 125 places, 204 transitions, 1887 flow [2023-11-29 06:35:31,533 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=21, PETRI_DIFFERENCE_MINUEND_FLOW=903, PETRI_DIFFERENCE_MINUEND_PLACES=86, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=128, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=76, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=45, PETRI_DIFFERENCE_SUBTRAHEND_STATES=30, PETRI_FLOW=1887, PETRI_PLACES=125, PETRI_TRANSITIONS=204} [2023-11-29 06:35:31,534 INFO L281 CegarLoopForPetriNet]: 22 programPoint places, 103 predicate places. [2023-11-29 06:35:31,534 INFO L495 AbstractCegarLoop]: Abstraction has has 125 places, 204 transitions, 1887 flow [2023-11-29 06:35:31,534 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 5.368421052631579) internal successors, (102), 19 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 06:35:31,534 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 06:35:31,535 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 06:35:31,541 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4bf5264f-ca7e-4100-a5c1-5c220218f14d/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2023-11-29 06:35:31,735 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4bf5264f-ca7e-4100-a5c1-5c220218f14d/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 06:35:31,736 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-29 06:35:31,736 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 06:35:31,736 INFO L85 PathProgramCache]: Analyzing trace with hash -875381067, now seen corresponding path program 3 times [2023-11-29 06:35:31,736 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 06:35:31,736 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1068758384] [2023-11-29 06:35:31,737 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 06:35:31,737 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 06:35:31,762 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 06:35:31,906 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-29 06:35:31,906 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 06:35:31,906 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1068758384] [2023-11-29 06:35:31,906 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1068758384] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 06:35:31,907 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1117966814] [2023-11-29 06:35:31,907 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-11-29 06:35:31,907 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 06:35:31,907 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4bf5264f-ca7e-4100-a5c1-5c220218f14d/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 06:35:31,908 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4bf5264f-ca7e-4100-a5c1-5c220218f14d/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 06:35:31,910 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4bf5264f-ca7e-4100-a5c1-5c220218f14d/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-11-29 06:35:32,049 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2023-11-29 06:35:32,049 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-29 06:35:32,050 INFO L262 TraceCheckSpWp]: Trace formula consists of 166 conjuncts, 9 conjunts are in the unsatisfiable core [2023-11-29 06:35:32,052 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 06:35:32,091 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-29 06:35:32,091 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 06:35:32,188 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-29 06:35:32,188 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1117966814] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 06:35:32,188 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 06:35:32,188 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 11 [2023-11-29 06:35:32,188 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1960775382] [2023-11-29 06:35:32,189 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 06:35:32,189 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2023-11-29 06:35:32,189 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 06:35:32,190 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2023-11-29 06:35:32,190 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=78, Unknown=0, NotChecked=0, Total=110 [2023-11-29 06:35:32,190 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 21 [2023-11-29 06:35:32,190 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 125 places, 204 transitions, 1887 flow. Second operand has 11 states, 11 states have (on average 5.090909090909091) internal successors, (56), 11 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 06:35:32,191 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 06:35:32,191 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 21 [2023-11-29 06:35:32,191 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 06:35:32,740 INFO L124 PetriNetUnfolderBase]: 637/1226 cut-off events. [2023-11-29 06:35:32,740 INFO L125 PetriNetUnfolderBase]: For 2710/2710 co-relation queries the response was YES. [2023-11-29 06:35:32,743 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5391 conditions, 1226 events. 637/1226 cut-off events. For 2710/2710 co-relation queries the response was YES. Maximal size of possible extension queue 98. Compared 6697 event pairs, 192 based on Foata normal form. 10/1167 useless extension candidates. Maximal degree in co-relation 5158. Up to 1014 conditions per place. [2023-11-29 06:35:32,749 INFO L140 encePairwiseOnDemand]: 15/21 looper letters, 196 selfloop transitions, 49 changer transitions 0/246 dead transitions. [2023-11-29 06:35:32,749 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 134 places, 246 transitions, 2578 flow [2023-11-29 06:35:32,750 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2023-11-29 06:35:32,750 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2023-11-29 06:35:32,751 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 105 transitions. [2023-11-29 06:35:32,751 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4166666666666667 [2023-11-29 06:35:32,751 INFO L72 ComplementDD]: Start complementDD. Operand 12 states and 105 transitions. [2023-11-29 06:35:32,751 INFO L73 IsDeterministic]: Start isDeterministic. Operand 12 states and 105 transitions. [2023-11-29 06:35:32,751 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 06:35:32,751 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 12 states and 105 transitions. [2023-11-29 06:35:32,752 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 13 states, 12 states have (on average 8.75) internal successors, (105), 12 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 06:35:32,753 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 13 states, 13 states have (on average 21.0) internal successors, (273), 13 states have internal predecessors, (273), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 06:35:32,753 INFO L81 ComplementDD]: Finished complementDD. Result has 13 states, 13 states have (on average 21.0) internal successors, (273), 13 states have internal predecessors, (273), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 06:35:32,753 INFO L175 Difference]: Start difference. First operand has 125 places, 204 transitions, 1887 flow. Second operand 12 states and 105 transitions. [2023-11-29 06:35:32,753 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 134 places, 246 transitions, 2578 flow [2023-11-29 06:35:32,773 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 124 places, 246 transitions, 2462 flow, removed 25 selfloop flow, removed 10 redundant places. [2023-11-29 06:35:32,779 INFO L231 Difference]: Finished difference. Result has 128 places, 216 transitions, 2006 flow [2023-11-29 06:35:32,779 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=21, PETRI_DIFFERENCE_MINUEND_FLOW=1773, PETRI_DIFFERENCE_MINUEND_PLACES=113, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=204, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=38, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=163, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=2006, PETRI_PLACES=128, PETRI_TRANSITIONS=216} [2023-11-29 06:35:32,780 INFO L281 CegarLoopForPetriNet]: 22 programPoint places, 106 predicate places. [2023-11-29 06:35:32,780 INFO L495 AbstractCegarLoop]: Abstraction has has 128 places, 216 transitions, 2006 flow [2023-11-29 06:35:32,781 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 5.090909090909091) internal successors, (56), 11 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 06:35:32,781 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 06:35:32,781 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 06:35:32,786 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4bf5264f-ca7e-4100-a5c1-5c220218f14d/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2023-11-29 06:35:32,983 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4bf5264f-ca7e-4100-a5c1-5c220218f14d/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2023-11-29 06:35:32,983 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 06:35:32,983 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 06:35:32,984 INFO L85 PathProgramCache]: Analyzing trace with hash -1739082137, now seen corresponding path program 4 times [2023-11-29 06:35:32,984 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 06:35:32,984 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2041740547] [2023-11-29 06:35:32,984 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 06:35:32,984 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 06:35:33,012 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 06:35:33,163 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-29 06:35:33,163 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 06:35:33,164 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2041740547] [2023-11-29 06:35:33,164 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2041740547] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 06:35:33,164 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1403733134] [2023-11-29 06:35:33,164 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-11-29 06:35:33,164 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 06:35:33,164 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4bf5264f-ca7e-4100-a5c1-5c220218f14d/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 06:35:33,167 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4bf5264f-ca7e-4100-a5c1-5c220218f14d/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 06:35:33,172 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4bf5264f-ca7e-4100-a5c1-5c220218f14d/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-11-29 06:35:33,279 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-11-29 06:35:33,279 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-29 06:35:33,281 INFO L262 TraceCheckSpWp]: Trace formula consists of 166 conjuncts, 32 conjunts are in the unsatisfiable core [2023-11-29 06:35:33,284 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 06:35:33,317 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2023-11-29 06:35:33,521 INFO L349 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2023-11-29 06:35:33,521 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 115 treesize of output 104 [2023-11-29 06:35:33,600 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 06:35:33,600 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 06:35:34,761 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 29 [2023-11-29 06:35:34,768 INFO L349 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2023-11-29 06:35:34,768 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 62 treesize of output 41 [2023-11-29 06:35:34,784 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 87 treesize of output 77 [2023-11-29 06:35:34,828 INFO L349 Elim1Store]: treesize reduction 24, result has 60.7 percent of original size [2023-11-29 06:35:34,829 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 5 new quantified variables, introduced 6 case distinctions, treesize of input 216 treesize of output 164 [2023-11-29 06:35:35,263 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 06:35:35,263 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1403733134] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 06:35:35,263 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 06:35:35,263 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 8, 8] total 19 [2023-11-29 06:35:35,263 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1393440738] [2023-11-29 06:35:35,263 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 06:35:35,264 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2023-11-29 06:35:35,264 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 06:35:35,265 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2023-11-29 06:35:35,265 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=272, Unknown=0, NotChecked=0, Total=342 [2023-11-29 06:35:35,265 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 21 [2023-11-29 06:35:35,265 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 128 places, 216 transitions, 2006 flow. Second operand has 19 states, 19 states have (on average 5.368421052631579) internal successors, (102), 19 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 06:35:35,266 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 06:35:35,266 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 21 [2023-11-29 06:35:35,266 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 06:35:37,853 INFO L124 PetriNetUnfolderBase]: 897/1680 cut-off events. [2023-11-29 06:35:37,853 INFO L125 PetriNetUnfolderBase]: For 4340/4340 co-relation queries the response was YES. [2023-11-29 06:35:37,857 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7738 conditions, 1680 events. 897/1680 cut-off events. For 4340/4340 co-relation queries the response was YES. Maximal size of possible extension queue 128. Compared 9650 event pairs, 30 based on Foata normal form. 9/1570 useless extension candidates. Maximal degree in co-relation 7476. Up to 743 conditions per place. [2023-11-29 06:35:37,866 INFO L140 encePairwiseOnDemand]: 11/21 looper letters, 168 selfloop transitions, 186 changer transitions 32/387 dead transitions. [2023-11-29 06:35:37,866 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 152 places, 387 transitions, 3881 flow [2023-11-29 06:35:37,867 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2023-11-29 06:35:37,867 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 25 states. [2023-11-29 06:35:37,868 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 230 transitions. [2023-11-29 06:35:37,869 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4380952380952381 [2023-11-29 06:35:37,869 INFO L72 ComplementDD]: Start complementDD. Operand 25 states and 230 transitions. [2023-11-29 06:35:37,869 INFO L73 IsDeterministic]: Start isDeterministic. Operand 25 states and 230 transitions. [2023-11-29 06:35:37,869 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 06:35:37,869 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 25 states and 230 transitions. [2023-11-29 06:35:37,870 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 26 states, 25 states have (on average 9.2) internal successors, (230), 25 states have internal predecessors, (230), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 06:35:37,871 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 26 states, 26 states have (on average 21.0) internal successors, (546), 26 states have internal predecessors, (546), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 06:35:37,871 INFO L81 ComplementDD]: Finished complementDD. Result has 26 states, 26 states have (on average 21.0) internal successors, (546), 26 states have internal predecessors, (546), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 06:35:37,871 INFO L175 Difference]: Start difference. First operand has 128 places, 216 transitions, 2006 flow. Second operand 25 states and 230 transitions. [2023-11-29 06:35:37,871 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 152 places, 387 transitions, 3881 flow [2023-11-29 06:35:37,913 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 148 places, 387 transitions, 3772 flow, removed 30 selfloop flow, removed 4 redundant places. [2023-11-29 06:35:37,921 INFO L231 Difference]: Finished difference. Result has 157 places, 281 transitions, 3214 flow [2023-11-29 06:35:37,921 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=21, PETRI_DIFFERENCE_MINUEND_FLOW=1900, PETRI_DIFFERENCE_MINUEND_PLACES=124, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=215, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=133, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=71, PETRI_DIFFERENCE_SUBTRAHEND_STATES=25, PETRI_FLOW=3214, PETRI_PLACES=157, PETRI_TRANSITIONS=281} [2023-11-29 06:35:37,922 INFO L281 CegarLoopForPetriNet]: 22 programPoint places, 135 predicate places. [2023-11-29 06:35:37,922 INFO L495 AbstractCegarLoop]: Abstraction has has 157 places, 281 transitions, 3214 flow [2023-11-29 06:35:37,922 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 5.368421052631579) internal successors, (102), 19 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 06:35:37,923 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 06:35:37,923 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 06:35:37,929 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4bf5264f-ca7e-4100-a5c1-5c220218f14d/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2023-11-29 06:35:38,124 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4bf5264f-ca7e-4100-a5c1-5c220218f14d/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2023-11-29 06:35:38,125 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 06:35:38,125 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 06:35:38,125 INFO L85 PathProgramCache]: Analyzing trace with hash -908980295, now seen corresponding path program 5 times [2023-11-29 06:35:38,125 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 06:35:38,125 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1833741762] [2023-11-29 06:35:38,125 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 06:35:38,126 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 06:35:38,155 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 06:35:38,343 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-29 06:35:38,343 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 06:35:38,343 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1833741762] [2023-11-29 06:35:38,343 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1833741762] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 06:35:38,343 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [928612053] [2023-11-29 06:35:38,343 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-11-29 06:35:38,343 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 06:35:38,344 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4bf5264f-ca7e-4100-a5c1-5c220218f14d/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 06:35:38,345 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4bf5264f-ca7e-4100-a5c1-5c220218f14d/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 06:35:38,347 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4bf5264f-ca7e-4100-a5c1-5c220218f14d/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-11-29 06:35:38,452 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-11-29 06:35:38,452 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-29 06:35:38,454 INFO L262 TraceCheckSpWp]: Trace formula consists of 166 conjuncts, 32 conjunts are in the unsatisfiable core [2023-11-29 06:35:38,457 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 06:35:38,490 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2023-11-29 06:35:38,937 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 57 treesize of output 41 [2023-11-29 06:35:38,970 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 06:35:38,970 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 06:35:39,758 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 29 [2023-11-29 06:35:39,767 INFO L349 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2023-11-29 06:35:39,767 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 62 treesize of output 41 [2023-11-29 06:35:39,791 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 87 treesize of output 77 [2023-11-29 06:35:39,834 INFO L349 Elim1Store]: treesize reduction 24, result has 60.7 percent of original size [2023-11-29 06:35:39,834 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 5 new quantified variables, introduced 6 case distinctions, treesize of input 216 treesize of output 164 [2023-11-29 06:35:40,138 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 06:35:40,138 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [928612053] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 06:35:40,138 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 06:35:40,139 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 8, 8] total 19 [2023-11-29 06:35:40,139 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1832479017] [2023-11-29 06:35:40,139 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 06:35:40,139 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2023-11-29 06:35:40,140 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 06:35:40,140 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2023-11-29 06:35:40,140 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=277, Unknown=0, NotChecked=0, Total=342 [2023-11-29 06:35:40,140 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 21 [2023-11-29 06:35:40,140 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 157 places, 281 transitions, 3214 flow. Second operand has 19 states, 19 states have (on average 5.2631578947368425) internal successors, (100), 19 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 06:35:40,141 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 06:35:40,141 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 21 [2023-11-29 06:35:40,141 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 06:35:42,664 INFO L124 PetriNetUnfolderBase]: 1173/2304 cut-off events. [2023-11-29 06:35:42,664 INFO L125 PetriNetUnfolderBase]: For 9983/9983 co-relation queries the response was YES. [2023-11-29 06:35:42,671 INFO L83 FinitePrefix]: Finished finitePrefix Result has 11803 conditions, 2304 events. 1173/2304 cut-off events. For 9983/9983 co-relation queries the response was YES. Maximal size of possible extension queue 184. Compared 15209 event pairs, 22 based on Foata normal form. 45/2240 useless extension candidates. Maximal degree in co-relation 11534. Up to 645 conditions per place. [2023-11-29 06:35:42,680 INFO L140 encePairwiseOnDemand]: 10/21 looper letters, 154 selfloop transitions, 157 changer transitions 184/496 dead transitions. [2023-11-29 06:35:42,680 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 185 places, 496 transitions, 5812 flow [2023-11-29 06:35:42,681 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2023-11-29 06:35:42,681 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 31 states. [2023-11-29 06:35:42,682 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 275 transitions. [2023-11-29 06:35:42,683 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42242703533026116 [2023-11-29 06:35:42,683 INFO L72 ComplementDD]: Start complementDD. Operand 31 states and 275 transitions. [2023-11-29 06:35:42,683 INFO L73 IsDeterministic]: Start isDeterministic. Operand 31 states and 275 transitions. [2023-11-29 06:35:42,683 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 06:35:42,683 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 31 states and 275 transitions. [2023-11-29 06:35:42,684 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 32 states, 31 states have (on average 8.870967741935484) internal successors, (275), 31 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 06:35:42,685 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 32 states, 32 states have (on average 21.0) internal successors, (672), 32 states have internal predecessors, (672), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 06:35:42,685 INFO L81 ComplementDD]: Finished complementDD. Result has 32 states, 32 states have (on average 21.0) internal successors, (672), 32 states have internal predecessors, (672), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 06:35:42,686 INFO L175 Difference]: Start difference. First operand has 157 places, 281 transitions, 3214 flow. Second operand 31 states and 275 transitions. [2023-11-29 06:35:42,686 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 185 places, 496 transitions, 5812 flow [2023-11-29 06:35:42,739 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 175 places, 496 transitions, 5657 flow, removed 52 selfloop flow, removed 10 redundant places. [2023-11-29 06:35:42,744 INFO L231 Difference]: Finished difference. Result has 186 places, 231 transitions, 2889 flow [2023-11-29 06:35:42,745 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=21, PETRI_DIFFERENCE_MINUEND_FLOW=3100, PETRI_DIFFERENCE_MINUEND_PLACES=145, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=281, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=124, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=145, PETRI_DIFFERENCE_SUBTRAHEND_STATES=31, PETRI_FLOW=2889, PETRI_PLACES=186, PETRI_TRANSITIONS=231} [2023-11-29 06:35:42,745 INFO L281 CegarLoopForPetriNet]: 22 programPoint places, 164 predicate places. [2023-11-29 06:35:42,745 INFO L495 AbstractCegarLoop]: Abstraction has has 186 places, 231 transitions, 2889 flow [2023-11-29 06:35:42,745 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 5.2631578947368425) internal successors, (100), 19 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 06:35:42,745 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 06:35:42,746 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 06:35:42,750 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4bf5264f-ca7e-4100-a5c1-5c220218f14d/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2023-11-29 06:35:42,946 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4bf5264f-ca7e-4100-a5c1-5c220218f14d/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2023-11-29 06:35:42,946 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 06:35:42,947 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 06:35:42,947 INFO L85 PathProgramCache]: Analyzing trace with hash 626779200, now seen corresponding path program 1 times [2023-11-29 06:35:42,947 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 06:35:42,947 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1534908298] [2023-11-29 06:35:42,947 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 06:35:42,947 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 06:35:42,974 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 06:35:43,111 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-11-29 06:35:43,111 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 06:35:43,111 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1534908298] [2023-11-29 06:35:43,112 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1534908298] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 06:35:43,112 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1937861376] [2023-11-29 06:35:43,112 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 06:35:43,112 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 06:35:43,112 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4bf5264f-ca7e-4100-a5c1-5c220218f14d/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 06:35:43,113 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4bf5264f-ca7e-4100-a5c1-5c220218f14d/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 06:35:43,116 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4bf5264f-ca7e-4100-a5c1-5c220218f14d/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2023-11-29 06:35:43,287 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 06:35:43,288 INFO L262 TraceCheckSpWp]: Trace formula consists of 177 conjuncts, 9 conjunts are in the unsatisfiable core [2023-11-29 06:35:43,290 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 06:35:43,333 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-11-29 06:35:43,333 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 06:35:43,440 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-11-29 06:35:43,441 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1937861376] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 06:35:43,441 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 06:35:43,441 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 13 [2023-11-29 06:35:43,441 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [100548829] [2023-11-29 06:35:43,441 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 06:35:43,442 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2023-11-29 06:35:43,442 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 06:35:43,442 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2023-11-29 06:35:43,443 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=108, Unknown=0, NotChecked=0, Total=156 [2023-11-29 06:35:43,443 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 21 [2023-11-29 06:35:43,443 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 186 places, 231 transitions, 2889 flow. Second operand has 13 states, 13 states have (on average 5.384615384615385) internal successors, (70), 13 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 06:35:43,443 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 06:35:43,444 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 21 [2023-11-29 06:35:43,444 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 06:35:44,394 INFO L124 PetriNetUnfolderBase]: 785/1548 cut-off events. [2023-11-29 06:35:44,394 INFO L125 PetriNetUnfolderBase]: For 10896/10896 co-relation queries the response was YES. [2023-11-29 06:35:44,400 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8881 conditions, 1548 events. 785/1548 cut-off events. For 10896/10896 co-relation queries the response was YES. Maximal size of possible extension queue 120. Compared 9309 event pairs, 152 based on Foata normal form. 16/1551 useless extension candidates. Maximal degree in co-relation 8766. Up to 783 conditions per place. [2023-11-29 06:35:44,409 INFO L140 encePairwiseOnDemand]: 15/21 looper letters, 212 selfloop transitions, 90 changer transitions 28/331 dead transitions. [2023-11-29 06:35:44,409 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 182 places, 331 transitions, 4383 flow [2023-11-29 06:35:44,409 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2023-11-29 06:35:44,409 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2023-11-29 06:35:44,410 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 144 transitions. [2023-11-29 06:35:44,410 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42857142857142855 [2023-11-29 06:35:44,410 INFO L72 ComplementDD]: Start complementDD. Operand 16 states and 144 transitions. [2023-11-29 06:35:44,410 INFO L73 IsDeterministic]: Start isDeterministic. Operand 16 states and 144 transitions. [2023-11-29 06:35:44,411 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 06:35:44,411 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 16 states and 144 transitions. [2023-11-29 06:35:44,411 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 17 states, 16 states have (on average 9.0) internal successors, (144), 16 states have internal predecessors, (144), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 06:35:44,412 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 17 states, 17 states have (on average 21.0) internal successors, (357), 17 states have internal predecessors, (357), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 06:35:44,412 INFO L81 ComplementDD]: Finished complementDD. Result has 17 states, 17 states have (on average 21.0) internal successors, (357), 17 states have internal predecessors, (357), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 06:35:44,412 INFO L175 Difference]: Start difference. First operand has 186 places, 231 transitions, 2889 flow. Second operand 16 states and 144 transitions. [2023-11-29 06:35:44,412 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 182 places, 331 transitions, 4383 flow [2023-11-29 06:35:44,457 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 157 places, 331 transitions, 3974 flow, removed 125 selfloop flow, removed 25 redundant places. [2023-11-29 06:35:44,462 INFO L231 Difference]: Finished difference. Result has 161 places, 247 transitions, 2931 flow [2023-11-29 06:35:44,462 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=21, PETRI_DIFFERENCE_MINUEND_FLOW=2584, PETRI_DIFFERENCE_MINUEND_PLACES=142, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=231, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=74, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=155, PETRI_DIFFERENCE_SUBTRAHEND_STATES=16, PETRI_FLOW=2931, PETRI_PLACES=161, PETRI_TRANSITIONS=247} [2023-11-29 06:35:44,462 INFO L281 CegarLoopForPetriNet]: 22 programPoint places, 139 predicate places. [2023-11-29 06:35:44,462 INFO L495 AbstractCegarLoop]: Abstraction has has 161 places, 247 transitions, 2931 flow [2023-11-29 06:35:44,463 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 5.384615384615385) internal successors, (70), 13 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 06:35:44,463 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 06:35:44,463 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 06:35:44,468 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4bf5264f-ca7e-4100-a5c1-5c220218f14d/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2023-11-29 06:35:44,663 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4bf5264f-ca7e-4100-a5c1-5c220218f14d/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2023-11-29 06:35:44,663 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 06:35:44,664 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 06:35:44,664 INFO L85 PathProgramCache]: Analyzing trace with hash -683422931, now seen corresponding path program 6 times [2023-11-29 06:35:44,664 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 06:35:44,664 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [370728189] [2023-11-29 06:35:44,664 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 06:35:44,664 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 06:35:44,703 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 06:35:44,948 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-11-29 06:35:44,948 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 06:35:44,948 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [370728189] [2023-11-29 06:35:44,948 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [370728189] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 06:35:44,948 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1289590506] [2023-11-29 06:35:44,948 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-11-29 06:35:44,949 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 06:35:44,949 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4bf5264f-ca7e-4100-a5c1-5c220218f14d/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 06:35:44,950 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4bf5264f-ca7e-4100-a5c1-5c220218f14d/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 06:35:44,952 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4bf5264f-ca7e-4100-a5c1-5c220218f14d/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2023-11-29 06:35:45,050 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2023-11-29 06:35:45,051 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-29 06:35:45,052 INFO L262 TraceCheckSpWp]: Trace formula consists of 175 conjuncts, 23 conjunts are in the unsatisfiable core [2023-11-29 06:35:45,055 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 06:35:45,247 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-29 06:35:45,247 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 115 treesize of output 109 [2023-11-29 06:35:45,384 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-11-29 06:35:45,384 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 06:35:45,852 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-29 06:35:45,853 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 70 treesize of output 63 [2023-11-29 06:35:45,976 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-11-29 06:35:45,977 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1289590506] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 06:35:45,977 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 06:35:45,977 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 8, 7] total 18 [2023-11-29 06:35:45,977 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1939828564] [2023-11-29 06:35:45,977 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 06:35:45,977 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2023-11-29 06:35:45,977 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 06:35:45,978 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2023-11-29 06:35:45,978 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=247, Unknown=0, NotChecked=0, Total=306 [2023-11-29 06:35:45,978 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 21 [2023-11-29 06:35:45,978 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 161 places, 247 transitions, 2931 flow. Second operand has 18 states, 18 states have (on average 5.444444444444445) internal successors, (98), 18 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 06:35:45,978 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 06:35:45,978 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 21 [2023-11-29 06:35:45,979 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 06:35:47,492 INFO L124 PetriNetUnfolderBase]: 772/1541 cut-off events. [2023-11-29 06:35:47,492 INFO L125 PetriNetUnfolderBase]: For 8543/8543 co-relation queries the response was YES. [2023-11-29 06:35:47,498 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8350 conditions, 1541 events. 772/1541 cut-off events. For 8543/8543 co-relation queries the response was YES. Maximal size of possible extension queue 126. Compared 9338 event pairs, 50 based on Foata normal form. 3/1541 useless extension candidates. Maximal degree in co-relation 8250. Up to 994 conditions per place. [2023-11-29 06:35:47,509 INFO L140 encePairwiseOnDemand]: 12/21 looper letters, 202 selfloop transitions, 106 changer transitions 5/314 dead transitions. [2023-11-29 06:35:47,509 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 176 places, 314 transitions, 3894 flow [2023-11-29 06:35:47,510 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2023-11-29 06:35:47,510 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2023-11-29 06:35:47,511 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 160 transitions. [2023-11-29 06:35:47,511 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.47619047619047616 [2023-11-29 06:35:47,511 INFO L72 ComplementDD]: Start complementDD. Operand 16 states and 160 transitions. [2023-11-29 06:35:47,511 INFO L73 IsDeterministic]: Start isDeterministic. Operand 16 states and 160 transitions. [2023-11-29 06:35:47,512 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 06:35:47,512 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 16 states and 160 transitions. [2023-11-29 06:35:47,512 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 17 states, 16 states have (on average 10.0) internal successors, (160), 16 states have internal predecessors, (160), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 06:35:47,513 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 17 states, 17 states have (on average 21.0) internal successors, (357), 17 states have internal predecessors, (357), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 06:35:47,513 INFO L81 ComplementDD]: Finished complementDD. Result has 17 states, 17 states have (on average 21.0) internal successors, (357), 17 states have internal predecessors, (357), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 06:35:47,513 INFO L175 Difference]: Start difference. First operand has 161 places, 247 transitions, 2931 flow. Second operand 16 states and 160 transitions. [2023-11-29 06:35:47,513 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 176 places, 314 transitions, 3894 flow [2023-11-29 06:35:47,553 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 174 places, 314 transitions, 3839 flow, removed 22 selfloop flow, removed 2 redundant places. [2023-11-29 06:35:47,559 INFO L231 Difference]: Finished difference. Result has 178 places, 256 transitions, 3229 flow [2023-11-29 06:35:47,559 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=21, PETRI_DIFFERENCE_MINUEND_FLOW=2876, PETRI_DIFFERENCE_MINUEND_PLACES=159, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=247, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=99, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=144, PETRI_DIFFERENCE_SUBTRAHEND_STATES=16, PETRI_FLOW=3229, PETRI_PLACES=178, PETRI_TRANSITIONS=256} [2023-11-29 06:35:47,559 INFO L281 CegarLoopForPetriNet]: 22 programPoint places, 156 predicate places. [2023-11-29 06:35:47,560 INFO L495 AbstractCegarLoop]: Abstraction has has 178 places, 256 transitions, 3229 flow [2023-11-29 06:35:47,560 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 5.444444444444445) internal successors, (98), 18 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 06:35:47,560 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 06:35:47,560 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 06:35:47,565 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4bf5264f-ca7e-4100-a5c1-5c220218f14d/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2023-11-29 06:35:47,760 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4bf5264f-ca7e-4100-a5c1-5c220218f14d/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2023-11-29 06:35:47,761 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 06:35:47,761 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 06:35:47,761 INFO L85 PathProgramCache]: Analyzing trace with hash 1168086545, now seen corresponding path program 7 times [2023-11-29 06:35:47,761 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 06:35:47,761 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1799355856] [2023-11-29 06:35:47,761 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 06:35:47,761 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 06:35:47,780 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 06:35:47,968 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-11-29 06:35:47,969 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 06:35:47,969 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1799355856] [2023-11-29 06:35:47,969 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1799355856] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 06:35:47,969 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [157234305] [2023-11-29 06:35:47,969 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-11-29 06:35:47,969 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 06:35:47,969 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4bf5264f-ca7e-4100-a5c1-5c220218f14d/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 06:35:47,970 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4bf5264f-ca7e-4100-a5c1-5c220218f14d/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 06:35:47,973 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4bf5264f-ca7e-4100-a5c1-5c220218f14d/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2023-11-29 06:35:48,068 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 06:35:48,069 INFO L262 TraceCheckSpWp]: Trace formula consists of 175 conjuncts, 23 conjunts are in the unsatisfiable core [2023-11-29 06:35:48,072 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 06:35:48,298 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2023-11-29 06:35:48,310 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-11-29 06:35:48,310 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 06:35:49,011 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-29 06:35:49,011 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 70 treesize of output 63 [2023-11-29 06:35:49,153 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-11-29 06:35:49,154 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [157234305] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 06:35:49,154 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 06:35:49,154 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 8, 7] total 18 [2023-11-29 06:35:49,154 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [445595039] [2023-11-29 06:35:49,154 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 06:35:49,154 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2023-11-29 06:35:49,155 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 06:35:49,155 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2023-11-29 06:35:49,155 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=251, Unknown=0, NotChecked=0, Total=306 [2023-11-29 06:35:49,156 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 21 [2023-11-29 06:35:49,156 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 178 places, 256 transitions, 3229 flow. Second operand has 18 states, 18 states have (on average 5.555555555555555) internal successors, (100), 18 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 06:35:49,156 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 06:35:49,156 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 21 [2023-11-29 06:35:49,156 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 06:35:50,976 INFO L124 PetriNetUnfolderBase]: 767/1517 cut-off events. [2023-11-29 06:35:50,977 INFO L125 PetriNetUnfolderBase]: For 9224/9224 co-relation queries the response was YES. [2023-11-29 06:35:50,981 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8546 conditions, 1517 events. 767/1517 cut-off events. For 9224/9224 co-relation queries the response was YES. Maximal size of possible extension queue 110. Compared 9037 event pairs, 46 based on Foata normal form. 5/1520 useless extension candidates. Maximal degree in co-relation 8438. Up to 994 conditions per place. [2023-11-29 06:35:50,988 INFO L140 encePairwiseOnDemand]: 12/21 looper letters, 201 selfloop transitions, 105 changer transitions 4/311 dead transitions. [2023-11-29 06:35:50,988 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 192 places, 311 transitions, 4066 flow [2023-11-29 06:35:50,989 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2023-11-29 06:35:50,989 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2023-11-29 06:35:50,990 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 166 transitions. [2023-11-29 06:35:50,990 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4649859943977591 [2023-11-29 06:35:50,990 INFO L72 ComplementDD]: Start complementDD. Operand 17 states and 166 transitions. [2023-11-29 06:35:50,990 INFO L73 IsDeterministic]: Start isDeterministic. Operand 17 states and 166 transitions. [2023-11-29 06:35:50,990 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 06:35:50,991 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 17 states and 166 transitions. [2023-11-29 06:35:50,991 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 18 states, 17 states have (on average 9.764705882352942) internal successors, (166), 17 states have internal predecessors, (166), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 06:35:50,992 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 18 states, 18 states have (on average 21.0) internal successors, (378), 18 states have internal predecessors, (378), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 06:35:50,992 INFO L81 ComplementDD]: Finished complementDD. Result has 18 states, 18 states have (on average 21.0) internal successors, (378), 18 states have internal predecessors, (378), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 06:35:50,992 INFO L175 Difference]: Start difference. First operand has 178 places, 256 transitions, 3229 flow. Second operand 17 states and 166 transitions. [2023-11-29 06:35:50,992 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 192 places, 311 transitions, 4066 flow [2023-11-29 06:35:51,031 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 186 places, 311 transitions, 3953 flow, removed 19 selfloop flow, removed 6 redundant places. [2023-11-29 06:35:51,035 INFO L231 Difference]: Finished difference. Result has 187 places, 254 transitions, 3300 flow [2023-11-29 06:35:51,036 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=21, PETRI_DIFFERENCE_MINUEND_FLOW=3090, PETRI_DIFFERENCE_MINUEND_PLACES=170, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=254, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=104, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=149, PETRI_DIFFERENCE_SUBTRAHEND_STATES=17, PETRI_FLOW=3300, PETRI_PLACES=187, PETRI_TRANSITIONS=254} [2023-11-29 06:35:51,036 INFO L281 CegarLoopForPetriNet]: 22 programPoint places, 165 predicate places. [2023-11-29 06:35:51,036 INFO L495 AbstractCegarLoop]: Abstraction has has 187 places, 254 transitions, 3300 flow [2023-11-29 06:35:51,036 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 5.555555555555555) internal successors, (100), 18 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 06:35:51,036 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 06:35:51,036 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 06:35:51,041 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4bf5264f-ca7e-4100-a5c1-5c220218f14d/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Ended with exit code 0 [2023-11-29 06:35:51,237 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4bf5264f-ca7e-4100-a5c1-5c220218f14d/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2023-11-29 06:35:51,237 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 06:35:51,237 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 06:35:51,238 INFO L85 PathProgramCache]: Analyzing trace with hash -1694873620, now seen corresponding path program 2 times [2023-11-29 06:35:51,238 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 06:35:51,238 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [990987409] [2023-11-29 06:35:51,238 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 06:35:51,238 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 06:35:51,261 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 06:35:51,355 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-11-29 06:35:51,356 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 06:35:51,356 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [990987409] [2023-11-29 06:35:51,356 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [990987409] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 06:35:51,356 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1286159516] [2023-11-29 06:35:51,356 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-29 06:35:51,356 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 06:35:51,357 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4bf5264f-ca7e-4100-a5c1-5c220218f14d/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 06:35:51,358 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4bf5264f-ca7e-4100-a5c1-5c220218f14d/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 06:35:51,360 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4bf5264f-ca7e-4100-a5c1-5c220218f14d/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2023-11-29 06:35:51,504 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-11-29 06:35:51,504 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-29 06:35:51,506 INFO L262 TraceCheckSpWp]: Trace formula consists of 177 conjuncts, 9 conjunts are in the unsatisfiable core [2023-11-29 06:35:51,507 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 06:35:51,546 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-11-29 06:35:51,546 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 06:35:51,681 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-11-29 06:35:51,681 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1286159516] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 06:35:51,682 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 06:35:51,682 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 11 [2023-11-29 06:35:51,682 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [108069351] [2023-11-29 06:35:51,682 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 06:35:51,682 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2023-11-29 06:35:51,683 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 06:35:51,683 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2023-11-29 06:35:51,683 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=79, Unknown=0, NotChecked=0, Total=110 [2023-11-29 06:35:51,683 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 21 [2023-11-29 06:35:51,683 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 187 places, 254 transitions, 3300 flow. Second operand has 11 states, 11 states have (on average 5.2727272727272725) internal successors, (58), 11 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 06:35:51,684 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 06:35:51,684 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 21 [2023-11-29 06:35:51,684 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 06:35:52,486 INFO L124 PetriNetUnfolderBase]: 790/1557 cut-off events. [2023-11-29 06:35:52,486 INFO L125 PetriNetUnfolderBase]: For 10042/10042 co-relation queries the response was YES. [2023-11-29 06:35:52,491 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8877 conditions, 1557 events. 790/1557 cut-off events. For 10042/10042 co-relation queries the response was YES. Maximal size of possible extension queue 114. Compared 9364 event pairs, 152 based on Foata normal form. 16/1571 useless extension candidates. Maximal degree in co-relation 8766. Up to 785 conditions per place. [2023-11-29 06:35:52,497 INFO L140 encePairwiseOnDemand]: 15/21 looper letters, 224 selfloop transitions, 102 changer transitions 20/347 dead transitions. [2023-11-29 06:35:52,497 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 203 places, 347 transitions, 4609 flow [2023-11-29 06:35:52,497 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2023-11-29 06:35:52,498 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2023-11-29 06:35:52,498 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 167 transitions. [2023-11-29 06:35:52,498 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4677871148459384 [2023-11-29 06:35:52,498 INFO L72 ComplementDD]: Start complementDD. Operand 17 states and 167 transitions. [2023-11-29 06:35:52,498 INFO L73 IsDeterministic]: Start isDeterministic. Operand 17 states and 167 transitions. [2023-11-29 06:35:52,499 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 06:35:52,499 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 17 states and 167 transitions. [2023-11-29 06:35:52,499 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 18 states, 17 states have (on average 9.823529411764707) internal successors, (167), 17 states have internal predecessors, (167), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 06:35:52,500 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 18 states, 18 states have (on average 21.0) internal successors, (378), 18 states have internal predecessors, (378), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 06:35:52,500 INFO L81 ComplementDD]: Finished complementDD. Result has 18 states, 18 states have (on average 21.0) internal successors, (378), 18 states have internal predecessors, (378), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 06:35:52,500 INFO L175 Difference]: Start difference. First operand has 187 places, 254 transitions, 3300 flow. Second operand 17 states and 167 transitions. [2023-11-29 06:35:52,500 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 203 places, 347 transitions, 4609 flow [2023-11-29 06:35:52,546 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 188 places, 347 transitions, 4363 flow, removed 14 selfloop flow, removed 15 redundant places. [2023-11-29 06:35:52,551 INFO L231 Difference]: Finished difference. Result has 193 places, 264 transitions, 3436 flow [2023-11-29 06:35:52,552 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=21, PETRI_DIFFERENCE_MINUEND_FLOW=3062, PETRI_DIFFERENCE_MINUEND_PLACES=172, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=254, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=92, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=158, PETRI_DIFFERENCE_SUBTRAHEND_STATES=17, PETRI_FLOW=3436, PETRI_PLACES=193, PETRI_TRANSITIONS=264} [2023-11-29 06:35:52,552 INFO L281 CegarLoopForPetriNet]: 22 programPoint places, 171 predicate places. [2023-11-29 06:35:52,552 INFO L495 AbstractCegarLoop]: Abstraction has has 193 places, 264 transitions, 3436 flow [2023-11-29 06:35:52,552 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 5.2727272727272725) internal successors, (58), 11 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 06:35:52,552 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 06:35:52,552 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 06:35:52,557 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4bf5264f-ca7e-4100-a5c1-5c220218f14d/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Ended with exit code 0 [2023-11-29 06:35:52,753 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4bf5264f-ca7e-4100-a5c1-5c220218f14d/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2023-11-29 06:35:52,753 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 06:35:52,753 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 06:35:52,753 INFO L85 PathProgramCache]: Analyzing trace with hash -704012046, now seen corresponding path program 3 times [2023-11-29 06:35:52,753 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 06:35:52,754 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [518167005] [2023-11-29 06:35:52,754 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 06:35:52,754 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 06:35:52,770 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 06:35:52,926 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-11-29 06:35:52,926 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 06:35:52,926 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [518167005] [2023-11-29 06:35:52,927 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [518167005] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 06:35:52,927 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1003720007] [2023-11-29 06:35:52,927 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-11-29 06:35:52,927 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 06:35:52,927 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4bf5264f-ca7e-4100-a5c1-5c220218f14d/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 06:35:52,928 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4bf5264f-ca7e-4100-a5c1-5c220218f14d/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 06:35:52,932 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4bf5264f-ca7e-4100-a5c1-5c220218f14d/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2023-11-29 06:35:53,092 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2023-11-29 06:35:53,092 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-29 06:35:53,093 INFO L262 TraceCheckSpWp]: Trace formula consists of 177 conjuncts, 8 conjunts are in the unsatisfiable core [2023-11-29 06:35:53,095 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 06:35:53,124 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-11-29 06:35:53,125 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 06:35:53,197 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-11-29 06:35:53,198 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1003720007] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 06:35:53,198 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 06:35:53,198 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 12 [2023-11-29 06:35:53,198 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [133754008] [2023-11-29 06:35:53,198 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 06:35:53,198 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-11-29 06:35:53,199 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 06:35:53,199 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-11-29 06:35:53,199 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=95, Unknown=0, NotChecked=0, Total=132 [2023-11-29 06:35:53,199 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 21 [2023-11-29 06:35:53,200 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 193 places, 264 transitions, 3436 flow. Second operand has 12 states, 12 states have (on average 5.333333333333333) internal successors, (64), 12 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 06:35:53,200 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 06:35:53,200 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 21 [2023-11-29 06:35:53,200 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 06:35:54,111 INFO L124 PetriNetUnfolderBase]: 860/1666 cut-off events. [2023-11-29 06:35:54,111 INFO L125 PetriNetUnfolderBase]: For 12587/12587 co-relation queries the response was YES. [2023-11-29 06:35:54,118 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9858 conditions, 1666 events. 860/1666 cut-off events. For 12587/12587 co-relation queries the response was YES. Maximal size of possible extension queue 133. Compared 10002 event pairs, 218 based on Foata normal form. 28/1691 useless extension candidates. Maximal degree in co-relation 9743. Up to 1111 conditions per place. [2023-11-29 06:35:54,124 INFO L140 encePairwiseOnDemand]: 15/21 looper letters, 238 selfloop transitions, 110 changer transitions 0/349 dead transitions. [2023-11-29 06:35:54,124 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 210 places, 349 transitions, 4720 flow [2023-11-29 06:35:54,125 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2023-11-29 06:35:54,125 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2023-11-29 06:35:54,126 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 172 transitions. [2023-11-29 06:35:54,126 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.455026455026455 [2023-11-29 06:35:54,126 INFO L72 ComplementDD]: Start complementDD. Operand 18 states and 172 transitions. [2023-11-29 06:35:54,126 INFO L73 IsDeterministic]: Start isDeterministic. Operand 18 states and 172 transitions. [2023-11-29 06:35:54,126 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 06:35:54,126 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 18 states and 172 transitions. [2023-11-29 06:35:54,127 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 19 states, 18 states have (on average 9.555555555555555) internal successors, (172), 18 states have internal predecessors, (172), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 06:35:54,128 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 19 states, 19 states have (on average 21.0) internal successors, (399), 19 states have internal predecessors, (399), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 06:35:54,128 INFO L81 ComplementDD]: Finished complementDD. Result has 19 states, 19 states have (on average 21.0) internal successors, (399), 19 states have internal predecessors, (399), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 06:35:54,128 INFO L175 Difference]: Start difference. First operand has 193 places, 264 transitions, 3436 flow. Second operand 18 states and 172 transitions. [2023-11-29 06:35:54,129 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 210 places, 349 transitions, 4720 flow [2023-11-29 06:35:54,189 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 204 places, 349 transitions, 4572 flow, removed 36 selfloop flow, removed 6 redundant places. [2023-11-29 06:35:54,195 INFO L231 Difference]: Finished difference. Result has 211 places, 291 transitions, 3981 flow [2023-11-29 06:35:54,195 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=21, PETRI_DIFFERENCE_MINUEND_FLOW=3280, PETRI_DIFFERENCE_MINUEND_PLACES=187, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=262, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=87, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=170, PETRI_DIFFERENCE_SUBTRAHEND_STATES=18, PETRI_FLOW=3981, PETRI_PLACES=211, PETRI_TRANSITIONS=291} [2023-11-29 06:35:54,196 INFO L281 CegarLoopForPetriNet]: 22 programPoint places, 189 predicate places. [2023-11-29 06:35:54,196 INFO L495 AbstractCegarLoop]: Abstraction has has 211 places, 291 transitions, 3981 flow [2023-11-29 06:35:54,196 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 5.333333333333333) internal successors, (64), 12 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 06:35:54,196 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 06:35:54,196 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 06:35:54,202 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4bf5264f-ca7e-4100-a5c1-5c220218f14d/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2023-11-29 06:35:54,396 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4bf5264f-ca7e-4100-a5c1-5c220218f14d/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2023-11-29 06:35:54,397 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 06:35:54,397 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 06:35:54,397 INFO L85 PathProgramCache]: Analyzing trace with hash 805982065, now seen corresponding path program 8 times [2023-11-29 06:35:54,397 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 06:35:54,397 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [792717846] [2023-11-29 06:35:54,397 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 06:35:54,397 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 06:35:54,414 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 06:35:54,576 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-11-29 06:35:54,576 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 06:35:54,577 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [792717846] [2023-11-29 06:35:54,577 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [792717846] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 06:35:54,577 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [140379966] [2023-11-29 06:35:54,577 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-29 06:35:54,577 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 06:35:54,577 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4bf5264f-ca7e-4100-a5c1-5c220218f14d/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 06:35:54,578 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4bf5264f-ca7e-4100-a5c1-5c220218f14d/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 06:35:54,584 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4bf5264f-ca7e-4100-a5c1-5c220218f14d/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2023-11-29 06:35:54,702 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-11-29 06:35:54,702 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-29 06:35:54,704 INFO L262 TraceCheckSpWp]: Trace formula consists of 175 conjuncts, 23 conjunts are in the unsatisfiable core [2023-11-29 06:35:54,706 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 06:35:54,909 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-29 06:35:54,909 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 115 treesize of output 109 [2023-11-29 06:35:55,047 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-11-29 06:35:55,047 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 06:35:55,465 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-29 06:35:55,465 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 158 treesize of output 127 [2023-11-29 06:35:55,917 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-11-29 06:35:55,918 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [140379966] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 06:35:55,918 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 06:35:55,918 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 8, 7] total 18 [2023-11-29 06:35:55,918 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1612354662] [2023-11-29 06:35:55,918 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 06:35:55,918 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2023-11-29 06:35:55,919 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 06:35:55,919 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2023-11-29 06:35:55,919 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=244, Unknown=0, NotChecked=0, Total=306 [2023-11-29 06:35:55,919 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 21 [2023-11-29 06:35:55,920 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 211 places, 291 transitions, 3981 flow. Second operand has 18 states, 18 states have (on average 5.444444444444445) internal successors, (98), 18 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 06:35:55,920 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 06:35:55,920 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 21 [2023-11-29 06:35:55,920 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 06:35:57,194 INFO L124 PetriNetUnfolderBase]: 861/1669 cut-off events. [2023-11-29 06:35:57,194 INFO L125 PetriNetUnfolderBase]: For 13804/13804 co-relation queries the response was YES. [2023-11-29 06:35:57,204 INFO L83 FinitePrefix]: Finished finitePrefix Result has 10258 conditions, 1669 events. 861/1669 cut-off events. For 13804/13804 co-relation queries the response was YES. Maximal size of possible extension queue 133. Compared 9997 event pairs, 66 based on Foata normal form. 2/1668 useless extension candidates. Maximal degree in co-relation 10133. Up to 1372 conditions per place. [2023-11-29 06:35:57,212 INFO L140 encePairwiseOnDemand]: 13/21 looper letters, 268 selfloop transitions, 52 changer transitions 5/326 dead transitions. [2023-11-29 06:35:57,212 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 224 places, 326 transitions, 4797 flow [2023-11-29 06:35:57,212 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2023-11-29 06:35:57,212 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2023-11-29 06:35:57,213 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 120 transitions. [2023-11-29 06:35:57,213 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.40816326530612246 [2023-11-29 06:35:57,213 INFO L72 ComplementDD]: Start complementDD. Operand 14 states and 120 transitions. [2023-11-29 06:35:57,213 INFO L73 IsDeterministic]: Start isDeterministic. Operand 14 states and 120 transitions. [2023-11-29 06:35:57,213 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 06:35:57,213 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 14 states and 120 transitions. [2023-11-29 06:35:57,214 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 15 states, 14 states have (on average 8.571428571428571) internal successors, (120), 14 states have internal predecessors, (120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 06:35:57,214 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 15 states, 15 states have (on average 21.0) internal successors, (315), 15 states have internal predecessors, (315), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 06:35:57,214 INFO L81 ComplementDD]: Finished complementDD. Result has 15 states, 15 states have (on average 21.0) internal successors, (315), 15 states have internal predecessors, (315), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 06:35:57,214 INFO L175 Difference]: Start difference. First operand has 211 places, 291 transitions, 3981 flow. Second operand 14 states and 120 transitions. [2023-11-29 06:35:57,215 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 224 places, 326 transitions, 4797 flow [2023-11-29 06:35:57,285 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 215 places, 326 transitions, 4575 flow, removed 66 selfloop flow, removed 9 redundant places. [2023-11-29 06:35:57,291 INFO L231 Difference]: Finished difference. Result has 217 places, 292 transitions, 3886 flow [2023-11-29 06:35:57,291 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=21, PETRI_DIFFERENCE_MINUEND_FLOW=3760, PETRI_DIFFERENCE_MINUEND_PLACES=202, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=291, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=51, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=239, PETRI_DIFFERENCE_SUBTRAHEND_STATES=14, PETRI_FLOW=3886, PETRI_PLACES=217, PETRI_TRANSITIONS=292} [2023-11-29 06:35:57,291 INFO L281 CegarLoopForPetriNet]: 22 programPoint places, 195 predicate places. [2023-11-29 06:35:57,291 INFO L495 AbstractCegarLoop]: Abstraction has has 217 places, 292 transitions, 3886 flow [2023-11-29 06:35:57,292 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 5.444444444444445) internal successors, (98), 18 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 06:35:57,292 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 06:35:57,292 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 06:35:57,296 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4bf5264f-ca7e-4100-a5c1-5c220218f14d/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Ended with exit code 0 [2023-11-29 06:35:57,492 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4bf5264f-ca7e-4100-a5c1-5c220218f14d/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2023-11-29 06:35:57,492 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 06:35:57,492 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 06:35:57,493 INFO L85 PathProgramCache]: Analyzing trace with hash -1615479542, now seen corresponding path program 4 times [2023-11-29 06:35:57,493 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 06:35:57,493 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2057459464] [2023-11-29 06:35:57,493 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 06:35:57,493 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 06:35:57,509 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 06:35:57,669 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-11-29 06:35:57,669 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 06:35:57,669 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2057459464] [2023-11-29 06:35:57,669 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2057459464] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 06:35:57,669 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [385471733] [2023-11-29 06:35:57,669 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-11-29 06:35:57,669 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 06:35:57,670 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4bf5264f-ca7e-4100-a5c1-5c220218f14d/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 06:35:57,670 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4bf5264f-ca7e-4100-a5c1-5c220218f14d/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 06:35:57,677 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4bf5264f-ca7e-4100-a5c1-5c220218f14d/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2023-11-29 06:35:57,877 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-11-29 06:35:57,877 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-29 06:35:57,879 INFO L262 TraceCheckSpWp]: Trace formula consists of 177 conjuncts, 9 conjunts are in the unsatisfiable core [2023-11-29 06:35:57,880 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 06:35:57,938 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-11-29 06:35:57,938 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 06:35:58,049 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-11-29 06:35:58,049 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [385471733] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 06:35:58,049 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 06:35:58,049 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 13 [2023-11-29 06:35:58,050 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [914369089] [2023-11-29 06:35:58,050 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 06:35:58,050 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2023-11-29 06:35:58,050 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 06:35:58,051 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2023-11-29 06:35:58,051 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=104, Unknown=0, NotChecked=0, Total=156 [2023-11-29 06:35:58,051 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 21 [2023-11-29 06:35:58,051 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 217 places, 292 transitions, 3886 flow. Second operand has 13 states, 13 states have (on average 4.923076923076923) internal successors, (64), 13 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 06:35:58,052 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 06:35:58,052 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 21 [2023-11-29 06:35:58,052 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 06:35:59,326 INFO L124 PetriNetUnfolderBase]: 1706/3248 cut-off events. [2023-11-29 06:35:59,326 INFO L125 PetriNetUnfolderBase]: For 27604/27604 co-relation queries the response was YES. [2023-11-29 06:35:59,340 INFO L83 FinitePrefix]: Finished finitePrefix Result has 20549 conditions, 3248 events. 1706/3248 cut-off events. For 27604/27604 co-relation queries the response was YES. Maximal size of possible extension queue 245. Compared 22120 event pairs, 67 based on Foata normal form. 20/3266 useless extension candidates. Maximal degree in co-relation 20423. Up to 1073 conditions per place. [2023-11-29 06:35:59,415 INFO L140 encePairwiseOnDemand]: 14/21 looper letters, 301 selfloop transitions, 285 changer transitions 0/587 dead transitions. [2023-11-29 06:35:59,415 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 233 places, 587 transitions, 8682 flow [2023-11-29 06:35:59,416 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2023-11-29 06:35:59,416 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2023-11-29 06:35:59,416 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 171 transitions. [2023-11-29 06:35:59,417 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4523809523809524 [2023-11-29 06:35:59,417 INFO L72 ComplementDD]: Start complementDD. Operand 18 states and 171 transitions. [2023-11-29 06:35:59,417 INFO L73 IsDeterministic]: Start isDeterministic. Operand 18 states and 171 transitions. [2023-11-29 06:35:59,417 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 06:35:59,417 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 18 states and 171 transitions. [2023-11-29 06:35:59,418 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 19 states, 18 states have (on average 9.5) internal successors, (171), 18 states have internal predecessors, (171), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 06:35:59,419 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 19 states, 19 states have (on average 21.0) internal successors, (399), 19 states have internal predecessors, (399), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 06:35:59,419 INFO L81 ComplementDD]: Finished complementDD. Result has 19 states, 19 states have (on average 21.0) internal successors, (399), 19 states have internal predecessors, (399), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 06:35:59,419 INFO L175 Difference]: Start difference. First operand has 217 places, 292 transitions, 3886 flow. Second operand 18 states and 171 transitions. [2023-11-29 06:35:59,419 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 233 places, 587 transitions, 8682 flow [2023-11-29 06:35:59,601 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 224 places, 587 transitions, 8532 flow, removed 48 selfloop flow, removed 9 redundant places. [2023-11-29 06:35:59,613 INFO L231 Difference]: Finished difference. Result has 236 places, 435 transitions, 7171 flow [2023-11-29 06:35:59,614 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=21, PETRI_DIFFERENCE_MINUEND_FLOW=3816, PETRI_DIFFERENCE_MINUEND_PLACES=207, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=292, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=159, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=104, PETRI_DIFFERENCE_SUBTRAHEND_STATES=18, PETRI_FLOW=7171, PETRI_PLACES=236, PETRI_TRANSITIONS=435} [2023-11-29 06:35:59,614 INFO L281 CegarLoopForPetriNet]: 22 programPoint places, 214 predicate places. [2023-11-29 06:35:59,614 INFO L495 AbstractCegarLoop]: Abstraction has has 236 places, 435 transitions, 7171 flow [2023-11-29 06:35:59,615 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 4.923076923076923) internal successors, (64), 13 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 06:35:59,615 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 06:35:59,615 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 06:35:59,621 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4bf5264f-ca7e-4100-a5c1-5c220218f14d/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Ended with exit code 0 [2023-11-29 06:35:59,816 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4bf5264f-ca7e-4100-a5c1-5c220218f14d/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 06:35:59,816 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 06:35:59,817 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 06:35:59,817 INFO L85 PathProgramCache]: Analyzing trace with hash 942710022, now seen corresponding path program 5 times [2023-11-29 06:35:59,817 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 06:35:59,817 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1480357944] [2023-11-29 06:35:59,817 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 06:35:59,817 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 06:35:59,839 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 06:36:00,042 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-11-29 06:36:00,042 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 06:36:00,042 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1480357944] [2023-11-29 06:36:00,043 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1480357944] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 06:36:00,043 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [708234024] [2023-11-29 06:36:00,043 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-11-29 06:36:00,043 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 06:36:00,043 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4bf5264f-ca7e-4100-a5c1-5c220218f14d/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 06:36:00,044 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4bf5264f-ca7e-4100-a5c1-5c220218f14d/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 06:36:00,052 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4bf5264f-ca7e-4100-a5c1-5c220218f14d/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2023-11-29 06:36:00,214 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-11-29 06:36:00,215 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-29 06:36:00,216 INFO L262 TraceCheckSpWp]: Trace formula consists of 177 conjuncts, 9 conjunts are in the unsatisfiable core [2023-11-29 06:36:00,217 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 06:36:00,277 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-11-29 06:36:00,277 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 06:36:00,500 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-11-29 06:36:00,500 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [708234024] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 06:36:00,501 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 06:36:00,501 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 12 [2023-11-29 06:36:00,501 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1103436469] [2023-11-29 06:36:00,501 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 06:36:00,501 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-11-29 06:36:00,501 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 06:36:00,502 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-11-29 06:36:00,502 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=92, Unknown=0, NotChecked=0, Total=132 [2023-11-29 06:36:00,502 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 21 [2023-11-29 06:36:00,502 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 236 places, 435 transitions, 7171 flow. Second operand has 12 states, 12 states have (on average 5.083333333333333) internal successors, (61), 12 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 06:36:00,502 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 06:36:00,502 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 21 [2023-11-29 06:36:00,503 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 06:36:02,510 INFO L124 PetriNetUnfolderBase]: 1758/3465 cut-off events. [2023-11-29 06:36:02,510 INFO L125 PetriNetUnfolderBase]: For 34257/34257 co-relation queries the response was YES. [2023-11-29 06:36:02,524 INFO L83 FinitePrefix]: Finished finitePrefix Result has 23188 conditions, 3465 events. 1758/3465 cut-off events. For 34257/34257 co-relation queries the response was YES. Maximal size of possible extension queue 261. Compared 24681 event pairs, 69 based on Foata normal form. 6/3468 useless extension candidates. Maximal degree in co-relation 23054. Up to 1318 conditions per place. [2023-11-29 06:36:02,539 INFO L140 encePairwiseOnDemand]: 15/21 looper letters, 361 selfloop transitions, 241 changer transitions 40/643 dead transitions. [2023-11-29 06:36:02,539 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 252 places, 643 transitions, 10741 flow [2023-11-29 06:36:02,540 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2023-11-29 06:36:02,540 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2023-11-29 06:36:02,540 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 170 transitions. [2023-11-29 06:36:02,541 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.47619047619047616 [2023-11-29 06:36:02,541 INFO L72 ComplementDD]: Start complementDD. Operand 17 states and 170 transitions. [2023-11-29 06:36:02,541 INFO L73 IsDeterministic]: Start isDeterministic. Operand 17 states and 170 transitions. [2023-11-29 06:36:02,541 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 06:36:02,541 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 17 states and 170 transitions. [2023-11-29 06:36:02,542 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 18 states, 17 states have (on average 10.0) internal successors, (170), 17 states have internal predecessors, (170), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 06:36:02,542 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 18 states, 18 states have (on average 21.0) internal successors, (378), 18 states have internal predecessors, (378), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 06:36:02,543 INFO L81 ComplementDD]: Finished complementDD. Result has 18 states, 18 states have (on average 21.0) internal successors, (378), 18 states have internal predecessors, (378), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 06:36:02,543 INFO L175 Difference]: Start difference. First operand has 236 places, 435 transitions, 7171 flow. Second operand 17 states and 170 transitions. [2023-11-29 06:36:02,543 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 252 places, 643 transitions, 10741 flow [2023-11-29 06:36:02,742 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 249 places, 643 transitions, 10314 flow, removed 166 selfloop flow, removed 3 redundant places. [2023-11-29 06:36:02,752 INFO L231 Difference]: Finished difference. Result has 252 places, 451 transitions, 7597 flow [2023-11-29 06:36:02,752 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=21, PETRI_DIFFERENCE_MINUEND_FLOW=6768, PETRI_DIFFERENCE_MINUEND_PLACES=233, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=434, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=224, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=203, PETRI_DIFFERENCE_SUBTRAHEND_STATES=17, PETRI_FLOW=7597, PETRI_PLACES=252, PETRI_TRANSITIONS=451} [2023-11-29 06:36:02,753 INFO L281 CegarLoopForPetriNet]: 22 programPoint places, 230 predicate places. [2023-11-29 06:36:02,753 INFO L495 AbstractCegarLoop]: Abstraction has has 252 places, 451 transitions, 7597 flow [2023-11-29 06:36:02,753 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 5.083333333333333) internal successors, (61), 12 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 06:36:02,753 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 06:36:02,753 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 06:36:02,757 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4bf5264f-ca7e-4100-a5c1-5c220218f14d/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Ended with exit code 0 [2023-11-29 06:36:02,953 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4bf5264f-ca7e-4100-a5c1-5c220218f14d/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 06:36:02,954 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 06:36:02,954 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 06:36:02,954 INFO L85 PathProgramCache]: Analyzing trace with hash 1343837643, now seen corresponding path program 9 times [2023-11-29 06:36:02,954 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 06:36:02,954 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [62591740] [2023-11-29 06:36:02,954 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 06:36:02,954 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 06:36:02,975 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 06:36:03,110 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-11-29 06:36:03,110 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 06:36:03,111 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [62591740] [2023-11-29 06:36:03,111 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [62591740] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 06:36:03,111 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2086173895] [2023-11-29 06:36:03,111 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-11-29 06:36:03,111 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 06:36:03,111 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4bf5264f-ca7e-4100-a5c1-5c220218f14d/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 06:36:03,112 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4bf5264f-ca7e-4100-a5c1-5c220218f14d/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 06:36:03,115 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4bf5264f-ca7e-4100-a5c1-5c220218f14d/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2023-11-29 06:36:03,240 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2023-11-29 06:36:03,240 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-29 06:36:03,241 INFO L262 TraceCheckSpWp]: Trace formula consists of 175 conjuncts, 23 conjunts are in the unsatisfiable core [2023-11-29 06:36:03,244 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 06:36:03,423 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-29 06:36:03,424 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 115 treesize of output 109 [2023-11-29 06:36:03,544 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-11-29 06:36:03,545 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 06:36:03,947 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-29 06:36:03,947 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 158 treesize of output 127 [2023-11-29 06:36:04,348 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-11-29 06:36:04,349 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2086173895] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 06:36:04,349 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 06:36:04,349 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 8, 7] total 18 [2023-11-29 06:36:04,349 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1862763290] [2023-11-29 06:36:04,349 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 06:36:04,350 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2023-11-29 06:36:04,350 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 06:36:04,350 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2023-11-29 06:36:04,350 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=241, Unknown=0, NotChecked=0, Total=306 [2023-11-29 06:36:04,351 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 21 [2023-11-29 06:36:04,351 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 252 places, 451 transitions, 7597 flow. Second operand has 18 states, 18 states have (on average 5.444444444444445) internal successors, (98), 18 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 06:36:04,351 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 06:36:04,351 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 21 [2023-11-29 06:36:04,351 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 06:36:05,857 INFO L124 PetriNetUnfolderBase]: 1757/3457 cut-off events. [2023-11-29 06:36:05,858 INFO L125 PetriNetUnfolderBase]: For 35023/35023 co-relation queries the response was YES. [2023-11-29 06:36:05,873 INFO L83 FinitePrefix]: Finished finitePrefix Result has 23154 conditions, 3457 events. 1757/3457 cut-off events. For 35023/35023 co-relation queries the response was YES. Maximal size of possible extension queue 261. Compared 24398 event pairs, 129 based on Foata normal form. 2/3456 useless extension candidates. Maximal degree in co-relation 23016. Up to 3050 conditions per place. [2023-11-29 06:36:05,885 INFO L140 encePairwiseOnDemand]: 13/21 looper letters, 378 selfloop transitions, 103 changer transitions 5/487 dead transitions. [2023-11-29 06:36:05,885 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 264 places, 487 transitions, 8719 flow [2023-11-29 06:36:05,885 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2023-11-29 06:36:05,885 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2023-11-29 06:36:05,886 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 113 transitions. [2023-11-29 06:36:05,886 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4139194139194139 [2023-11-29 06:36:05,886 INFO L72 ComplementDD]: Start complementDD. Operand 13 states and 113 transitions. [2023-11-29 06:36:05,886 INFO L73 IsDeterministic]: Start isDeterministic. Operand 13 states and 113 transitions. [2023-11-29 06:36:05,886 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 06:36:05,886 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 13 states and 113 transitions. [2023-11-29 06:36:05,887 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 14 states, 13 states have (on average 8.692307692307692) internal successors, (113), 13 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 06:36:05,887 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 14 states, 14 states have (on average 21.0) internal successors, (294), 14 states have internal predecessors, (294), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 06:36:05,887 INFO L81 ComplementDD]: Finished complementDD. Result has 14 states, 14 states have (on average 21.0) internal successors, (294), 14 states have internal predecessors, (294), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 06:36:05,888 INFO L175 Difference]: Start difference. First operand has 252 places, 451 transitions, 7597 flow. Second operand 13 states and 113 transitions. [2023-11-29 06:36:05,888 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 264 places, 487 transitions, 8719 flow [2023-11-29 06:36:06,075 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 258 places, 487 transitions, 8492 flow, removed 58 selfloop flow, removed 6 redundant places. [2023-11-29 06:36:06,084 INFO L231 Difference]: Finished difference. Result has 260 places, 451 transitions, 7586 flow [2023-11-29 06:36:06,084 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=21, PETRI_DIFFERENCE_MINUEND_FLOW=7357, PETRI_DIFFERENCE_MINUEND_PLACES=246, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=450, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=102, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=347, PETRI_DIFFERENCE_SUBTRAHEND_STATES=13, PETRI_FLOW=7586, PETRI_PLACES=260, PETRI_TRANSITIONS=451} [2023-11-29 06:36:06,084 INFO L281 CegarLoopForPetriNet]: 22 programPoint places, 238 predicate places. [2023-11-29 06:36:06,085 INFO L495 AbstractCegarLoop]: Abstraction has has 260 places, 451 transitions, 7586 flow [2023-11-29 06:36:06,085 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 5.444444444444445) internal successors, (98), 18 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 06:36:06,085 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 06:36:06,085 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 06:36:06,089 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4bf5264f-ca7e-4100-a5c1-5c220218f14d/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Ended with exit code 0 [2023-11-29 06:36:06,285 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4bf5264f-ca7e-4100-a5c1-5c220218f14d/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 06:36:06,285 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 06:36:06,286 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 06:36:06,286 INFO L85 PathProgramCache]: Analyzing trace with hash 470096963, now seen corresponding path program 10 times [2023-11-29 06:36:06,286 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 06:36:06,286 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1705144341] [2023-11-29 06:36:06,286 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 06:36:06,286 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 06:36:06,305 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 06:36:06,452 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-11-29 06:36:06,452 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 06:36:06,453 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1705144341] [2023-11-29 06:36:06,453 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1705144341] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 06:36:06,453 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [557299509] [2023-11-29 06:36:06,453 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-11-29 06:36:06,453 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 06:36:06,453 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4bf5264f-ca7e-4100-a5c1-5c220218f14d/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 06:36:06,454 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4bf5264f-ca7e-4100-a5c1-5c220218f14d/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 06:36:06,458 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4bf5264f-ca7e-4100-a5c1-5c220218f14d/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2023-11-29 06:36:06,590 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-11-29 06:36:06,590 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-29 06:36:06,592 INFO L262 TraceCheckSpWp]: Trace formula consists of 175 conjuncts, 23 conjunts are in the unsatisfiable core [2023-11-29 06:36:06,594 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 06:36:06,918 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-29 06:36:06,919 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 48 treesize of output 39 [2023-11-29 06:36:06,991 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-11-29 06:36:06,992 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 06:36:07,155 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-29 06:36:07,156 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 154 treesize of output 154 [2023-11-29 06:36:07,806 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-11-29 06:36:07,807 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [557299509] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 06:36:07,807 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 06:36:07,807 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 8, 7] total 18 [2023-11-29 06:36:07,807 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [595286204] [2023-11-29 06:36:07,807 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 06:36:07,807 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2023-11-29 06:36:07,808 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 06:36:07,808 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2023-11-29 06:36:07,808 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=242, Unknown=0, NotChecked=0, Total=306 [2023-11-29 06:36:07,808 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 21 [2023-11-29 06:36:07,808 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 260 places, 451 transitions, 7586 flow. Second operand has 18 states, 18 states have (on average 5.444444444444445) internal successors, (98), 18 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 06:36:07,809 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 06:36:07,809 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 21 [2023-11-29 06:36:07,809 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 06:36:09,205 INFO L124 PetriNetUnfolderBase]: 1826/3652 cut-off events. [2023-11-29 06:36:09,205 INFO L125 PetriNetUnfolderBase]: For 35852/35852 co-relation queries the response was YES. [2023-11-29 06:36:09,221 INFO L83 FinitePrefix]: Finished finitePrefix Result has 24124 conditions, 3652 events. 1826/3652 cut-off events. For 35852/35852 co-relation queries the response was YES. Maximal size of possible extension queue 276. Compared 26606 event pairs, 6 based on Foata normal form. 3/3653 useless extension candidates. Maximal degree in co-relation 24013. Up to 2272 conditions per place. [2023-11-29 06:36:09,233 INFO L140 encePairwiseOnDemand]: 12/21 looper letters, 302 selfloop transitions, 231 changer transitions 12/546 dead transitions. [2023-11-29 06:36:09,233 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 274 places, 546 transitions, 9928 flow [2023-11-29 06:36:09,233 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2023-11-29 06:36:09,234 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2023-11-29 06:36:09,234 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 130 transitions. [2023-11-29 06:36:09,234 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3869047619047619 [2023-11-29 06:36:09,234 INFO L72 ComplementDD]: Start complementDD. Operand 16 states and 130 transitions. [2023-11-29 06:36:09,234 INFO L73 IsDeterministic]: Start isDeterministic. Operand 16 states and 130 transitions. [2023-11-29 06:36:09,235 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 06:36:09,235 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 16 states and 130 transitions. [2023-11-29 06:36:09,236 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 17 states, 16 states have (on average 8.125) internal successors, (130), 16 states have internal predecessors, (130), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 06:36:09,236 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 17 states, 17 states have (on average 21.0) internal successors, (357), 17 states have internal predecessors, (357), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 06:36:09,236 INFO L81 ComplementDD]: Finished complementDD. Result has 17 states, 17 states have (on average 21.0) internal successors, (357), 17 states have internal predecessors, (357), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 06:36:09,237 INFO L175 Difference]: Start difference. First operand has 260 places, 451 transitions, 7586 flow. Second operand 16 states and 130 transitions. [2023-11-29 06:36:09,237 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 274 places, 546 transitions, 9928 flow [2023-11-29 06:36:09,443 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 263 places, 546 transitions, 9755 flow, removed 13 selfloop flow, removed 11 redundant places. [2023-11-29 06:36:09,455 INFO L231 Difference]: Finished difference. Result has 267 places, 500 transitions, 9036 flow [2023-11-29 06:36:09,456 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=21, PETRI_DIFFERENCE_MINUEND_FLOW=7416, PETRI_DIFFERENCE_MINUEND_PLACES=248, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=450, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=181, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=230, PETRI_DIFFERENCE_SUBTRAHEND_STATES=16, PETRI_FLOW=9036, PETRI_PLACES=267, PETRI_TRANSITIONS=500} [2023-11-29 06:36:09,456 INFO L281 CegarLoopForPetriNet]: 22 programPoint places, 245 predicate places. [2023-11-29 06:36:09,456 INFO L495 AbstractCegarLoop]: Abstraction has has 267 places, 500 transitions, 9036 flow [2023-11-29 06:36:09,456 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 5.444444444444445) internal successors, (98), 18 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 06:36:09,456 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 06:36:09,457 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 06:36:09,462 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4bf5264f-ca7e-4100-a5c1-5c220218f14d/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Ended with exit code 0 [2023-11-29 06:36:09,657 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21,16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4bf5264f-ca7e-4100-a5c1-5c220218f14d/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 06:36:09,657 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-29 06:36:09,657 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 06:36:09,657 INFO L85 PathProgramCache]: Analyzing trace with hash -1876769776, now seen corresponding path program 6 times [2023-11-29 06:36:09,657 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 06:36:09,658 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [440573769] [2023-11-29 06:36:09,658 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 06:36:09,658 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 06:36:09,675 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 06:36:09,815 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-11-29 06:36:09,815 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 06:36:09,815 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [440573769] [2023-11-29 06:36:09,816 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [440573769] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 06:36:09,816 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1040445507] [2023-11-29 06:36:09,816 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-11-29 06:36:09,816 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 06:36:09,816 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4bf5264f-ca7e-4100-a5c1-5c220218f14d/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 06:36:09,817 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4bf5264f-ca7e-4100-a5c1-5c220218f14d/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 06:36:09,821 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4bf5264f-ca7e-4100-a5c1-5c220218f14d/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2023-11-29 06:36:09,990 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2023-11-29 06:36:09,990 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-29 06:36:09,991 INFO L262 TraceCheckSpWp]: Trace formula consists of 177 conjuncts, 9 conjunts are in the unsatisfiable core [2023-11-29 06:36:09,993 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 06:36:10,032 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-11-29 06:36:10,032 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 06:36:10,158 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-11-29 06:36:10,158 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1040445507] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 06:36:10,158 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 06:36:10,158 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 11 [2023-11-29 06:36:10,158 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1474349583] [2023-11-29 06:36:10,159 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 06:36:10,159 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2023-11-29 06:36:10,159 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 06:36:10,159 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2023-11-29 06:36:10,159 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=74, Unknown=0, NotChecked=0, Total=110 [2023-11-29 06:36:10,160 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 21 [2023-11-29 06:36:10,160 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 267 places, 500 transitions, 9036 flow. Second operand has 11 states, 11 states have (on average 5.454545454545454) internal successors, (60), 11 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 06:36:10,160 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 06:36:10,160 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 21 [2023-11-29 06:36:10,160 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 06:36:11,736 INFO L124 PetriNetUnfolderBase]: 1790/3604 cut-off events. [2023-11-29 06:36:11,736 INFO L125 PetriNetUnfolderBase]: For 41418/41418 co-relation queries the response was YES. [2023-11-29 06:36:11,756 INFO L83 FinitePrefix]: Finished finitePrefix Result has 25527 conditions, 3604 events. 1790/3604 cut-off events. For 41418/41418 co-relation queries the response was YES. Maximal size of possible extension queue 275. Compared 26331 event pairs, 253 based on Foata normal form. 24/3628 useless extension candidates. Maximal degree in co-relation 25341. Up to 1522 conditions per place. [2023-11-29 06:36:11,770 INFO L140 encePairwiseOnDemand]: 15/21 looper letters, 360 selfloop transitions, 232 changer transitions 26/619 dead transitions. [2023-11-29 06:36:11,770 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 281 places, 619 transitions, 11502 flow [2023-11-29 06:36:11,770 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2023-11-29 06:36:11,770 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2023-11-29 06:36:11,771 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 144 transitions. [2023-11-29 06:36:11,771 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42857142857142855 [2023-11-29 06:36:11,771 INFO L72 ComplementDD]: Start complementDD. Operand 16 states and 144 transitions. [2023-11-29 06:36:11,771 INFO L73 IsDeterministic]: Start isDeterministic. Operand 16 states and 144 transitions. [2023-11-29 06:36:11,772 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 06:36:11,772 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 16 states and 144 transitions. [2023-11-29 06:36:11,772 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 17 states, 16 states have (on average 9.0) internal successors, (144), 16 states have internal predecessors, (144), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 06:36:11,773 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 17 states, 17 states have (on average 21.0) internal successors, (357), 17 states have internal predecessors, (357), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 06:36:11,773 INFO L81 ComplementDD]: Finished complementDD. Result has 17 states, 17 states have (on average 21.0) internal successors, (357), 17 states have internal predecessors, (357), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 06:36:11,773 INFO L175 Difference]: Start difference. First operand has 267 places, 500 transitions, 9036 flow. Second operand 16 states and 144 transitions. [2023-11-29 06:36:11,773 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 281 places, 619 transitions, 11502 flow [2023-11-29 06:36:12,106 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 272 places, 619 transitions, 11372 flow, removed 44 selfloop flow, removed 9 redundant places. [2023-11-29 06:36:12,120 INFO L231 Difference]: Finished difference. Result has 274 places, 511 transitions, 9599 flow [2023-11-29 06:36:12,120 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=21, PETRI_DIFFERENCE_MINUEND_FLOW=8883, PETRI_DIFFERENCE_MINUEND_PLACES=257, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=498, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=220, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=272, PETRI_DIFFERENCE_SUBTRAHEND_STATES=16, PETRI_FLOW=9599, PETRI_PLACES=274, PETRI_TRANSITIONS=511} [2023-11-29 06:36:12,121 INFO L281 CegarLoopForPetriNet]: 22 programPoint places, 252 predicate places. [2023-11-29 06:36:12,121 INFO L495 AbstractCegarLoop]: Abstraction has has 274 places, 511 transitions, 9599 flow [2023-11-29 06:36:12,121 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 5.454545454545454) internal successors, (60), 11 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 06:36:12,121 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 06:36:12,121 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 06:36:12,125 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4bf5264f-ca7e-4100-a5c1-5c220218f14d/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Ended with exit code 0 [2023-11-29 06:36:12,321 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4bf5264f-ca7e-4100-a5c1-5c220218f14d/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable22 [2023-11-29 06:36:12,322 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-29 06:36:12,322 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 06:36:12,322 INFO L85 PathProgramCache]: Analyzing trace with hash -166156468, now seen corresponding path program 7 times [2023-11-29 06:36:12,322 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 06:36:12,322 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1528487698] [2023-11-29 06:36:12,322 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 06:36:12,322 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 06:36:12,344 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 06:36:12,507 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-11-29 06:36:12,507 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 06:36:12,507 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1528487698] [2023-11-29 06:36:12,507 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1528487698] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 06:36:12,507 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1631130465] [2023-11-29 06:36:12,507 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-11-29 06:36:12,507 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 06:36:12,508 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4bf5264f-ca7e-4100-a5c1-5c220218f14d/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 06:36:12,508 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4bf5264f-ca7e-4100-a5c1-5c220218f14d/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 06:36:12,509 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4bf5264f-ca7e-4100-a5c1-5c220218f14d/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2023-11-29 06:36:12,672 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 06:36:12,673 INFO L262 TraceCheckSpWp]: Trace formula consists of 177 conjuncts, 9 conjunts are in the unsatisfiable core [2023-11-29 06:36:12,674 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 06:36:12,710 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-11-29 06:36:12,710 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 06:36:12,834 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-11-29 06:36:12,834 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1631130465] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 06:36:12,834 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 06:36:12,834 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 12 [2023-11-29 06:36:12,834 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1290743714] [2023-11-29 06:36:12,835 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 06:36:12,835 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-11-29 06:36:12,835 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 06:36:12,835 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-11-29 06:36:12,836 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=92, Unknown=0, NotChecked=0, Total=132 [2023-11-29 06:36:12,836 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 21 [2023-11-29 06:36:12,836 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 274 places, 511 transitions, 9599 flow. Second operand has 12 states, 12 states have (on average 5.333333333333333) internal successors, (64), 12 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 06:36:12,836 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 06:36:12,836 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 21 [2023-11-29 06:36:12,836 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 06:36:14,748 INFO L124 PetriNetUnfolderBase]: 1856/3753 cut-off events. [2023-11-29 06:36:14,748 INFO L125 PetriNetUnfolderBase]: For 45530/45530 co-relation queries the response was YES. [2023-11-29 06:36:14,765 INFO L83 FinitePrefix]: Finished finitePrefix Result has 27034 conditions, 3753 events. 1856/3753 cut-off events. For 45530/45530 co-relation queries the response was YES. Maximal size of possible extension queue 292. Compared 27803 event pairs, 472 based on Foata normal form. 24/3776 useless extension candidates. Maximal degree in co-relation 26833. Up to 2677 conditions per place. [2023-11-29 06:36:14,779 INFO L140 encePairwiseOnDemand]: 15/21 looper letters, 408 selfloop transitions, 224 changer transitions 0/633 dead transitions. [2023-11-29 06:36:14,779 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 291 places, 633 transitions, 12110 flow [2023-11-29 06:36:14,779 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2023-11-29 06:36:14,779 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2023-11-29 06:36:14,780 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 166 transitions. [2023-11-29 06:36:14,780 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43915343915343913 [2023-11-29 06:36:14,780 INFO L72 ComplementDD]: Start complementDD. Operand 18 states and 166 transitions. [2023-11-29 06:36:14,780 INFO L73 IsDeterministic]: Start isDeterministic. Operand 18 states and 166 transitions. [2023-11-29 06:36:14,780 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 06:36:14,780 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 18 states and 166 transitions. [2023-11-29 06:36:14,781 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 19 states, 18 states have (on average 9.222222222222221) internal successors, (166), 18 states have internal predecessors, (166), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 06:36:14,781 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 19 states, 19 states have (on average 21.0) internal successors, (399), 19 states have internal predecessors, (399), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 06:36:14,782 INFO L81 ComplementDD]: Finished complementDD. Result has 19 states, 19 states have (on average 21.0) internal successors, (399), 19 states have internal predecessors, (399), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 06:36:14,782 INFO L175 Difference]: Start difference. First operand has 274 places, 511 transitions, 9599 flow. Second operand 18 states and 166 transitions. [2023-11-29 06:36:14,782 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 291 places, 633 transitions, 12110 flow [2023-11-29 06:36:15,021 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 284 places, 633 transitions, 11765 flow, removed 60 selfloop flow, removed 7 redundant places. [2023-11-29 06:36:15,033 INFO L231 Difference]: Finished difference. Result has 288 places, 541 transitions, 10520 flow [2023-11-29 06:36:15,034 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=21, PETRI_DIFFERENCE_MINUEND_FLOW=9154, PETRI_DIFFERENCE_MINUEND_PLACES=267, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=507, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=193, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=287, PETRI_DIFFERENCE_SUBTRAHEND_STATES=18, PETRI_FLOW=10520, PETRI_PLACES=288, PETRI_TRANSITIONS=541} [2023-11-29 06:36:15,034 INFO L281 CegarLoopForPetriNet]: 22 programPoint places, 266 predicate places. [2023-11-29 06:36:15,035 INFO L495 AbstractCegarLoop]: Abstraction has has 288 places, 541 transitions, 10520 flow [2023-11-29 06:36:15,035 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 5.333333333333333) internal successors, (64), 12 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 06:36:15,035 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 06:36:15,035 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 06:36:15,039 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4bf5264f-ca7e-4100-a5c1-5c220218f14d/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Ended with exit code 0 [2023-11-29 06:36:15,235 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23,18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4bf5264f-ca7e-4100-a5c1-5c220218f14d/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 06:36:15,235 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-29 06:36:15,236 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 06:36:15,236 INFO L85 PathProgramCache]: Analyzing trace with hash -2017665944, now seen corresponding path program 8 times [2023-11-29 06:36:15,236 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 06:36:15,236 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [640026518] [2023-11-29 06:36:15,236 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 06:36:15,236 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 06:36:15,251 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 06:36:15,362 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-11-29 06:36:15,363 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 06:36:15,363 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [640026518] [2023-11-29 06:36:15,363 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [640026518] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 06:36:15,363 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1965182258] [2023-11-29 06:36:15,363 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-29 06:36:15,363 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 06:36:15,363 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4bf5264f-ca7e-4100-a5c1-5c220218f14d/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 06:36:15,364 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4bf5264f-ca7e-4100-a5c1-5c220218f14d/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 06:36:15,365 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4bf5264f-ca7e-4100-a5c1-5c220218f14d/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2023-11-29 06:36:15,501 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-11-29 06:36:15,501 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-29 06:36:15,502 INFO L262 TraceCheckSpWp]: Trace formula consists of 177 conjuncts, 9 conjunts are in the unsatisfiable core [2023-11-29 06:36:15,503 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 06:36:15,533 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-11-29 06:36:15,533 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 06:36:15,613 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-11-29 06:36:15,613 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1965182258] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 06:36:15,613 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 06:36:15,613 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 12 [2023-11-29 06:36:15,613 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1045960608] [2023-11-29 06:36:15,613 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 06:36:15,613 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-11-29 06:36:15,614 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 06:36:15,614 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-11-29 06:36:15,614 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=100, Unknown=0, NotChecked=0, Total=132 [2023-11-29 06:36:15,614 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 21 [2023-11-29 06:36:15,615 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 288 places, 541 transitions, 10520 flow. Second operand has 12 states, 12 states have (on average 5.0) internal successors, (60), 12 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 06:36:15,615 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 06:36:15,615 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 21 [2023-11-29 06:36:15,615 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 06:36:17,143 INFO L124 PetriNetUnfolderBase]: 1850/3705 cut-off events. [2023-11-29 06:36:17,144 INFO L125 PetriNetUnfolderBase]: For 47540/47540 co-relation queries the response was YES. [2023-11-29 06:36:17,164 INFO L83 FinitePrefix]: Finished finitePrefix Result has 27371 conditions, 3705 events. 1850/3705 cut-off events. For 47540/47540 co-relation queries the response was YES. Maximal size of possible extension queue 285. Compared 27114 event pairs, 474 based on Foata normal form. 12/3716 useless extension candidates. Maximal degree in co-relation 27167. Up to 2677 conditions per place. [2023-11-29 06:36:17,181 INFO L140 encePairwiseOnDemand]: 15/21 looper letters, 395 selfloop transitions, 217 changer transitions 0/613 dead transitions. [2023-11-29 06:36:17,181 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 301 places, 613 transitions, 12280 flow [2023-11-29 06:36:17,182 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2023-11-29 06:36:17,182 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2023-11-29 06:36:17,182 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 139 transitions. [2023-11-29 06:36:17,183 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44126984126984126 [2023-11-29 06:36:17,183 INFO L72 ComplementDD]: Start complementDD. Operand 15 states and 139 transitions. [2023-11-29 06:36:17,183 INFO L73 IsDeterministic]: Start isDeterministic. Operand 15 states and 139 transitions. [2023-11-29 06:36:17,183 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 06:36:17,183 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 15 states and 139 transitions. [2023-11-29 06:36:17,184 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 16 states, 15 states have (on average 9.266666666666667) internal successors, (139), 15 states have internal predecessors, (139), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 06:36:17,185 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 16 states, 16 states have (on average 21.0) internal successors, (336), 16 states have internal predecessors, (336), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 06:36:17,185 INFO L81 ComplementDD]: Finished complementDD. Result has 16 states, 16 states have (on average 21.0) internal successors, (336), 16 states have internal predecessors, (336), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 06:36:17,185 INFO L175 Difference]: Start difference. First operand has 288 places, 541 transitions, 10520 flow. Second operand 15 states and 139 transitions. [2023-11-29 06:36:17,185 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 301 places, 613 transitions, 12280 flow [2023-11-29 06:36:17,472 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 293 places, 613 transitions, 12082 flow, removed 38 selfloop flow, removed 8 redundant places. [2023-11-29 06:36:17,486 INFO L231 Difference]: Finished difference. Result has 294 places, 541 transitions, 10774 flow [2023-11-29 06:36:17,486 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=21, PETRI_DIFFERENCE_MINUEND_FLOW=10208, PETRI_DIFFERENCE_MINUEND_PLACES=279, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=536, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=212, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=319, PETRI_DIFFERENCE_SUBTRAHEND_STATES=15, PETRI_FLOW=10774, PETRI_PLACES=294, PETRI_TRANSITIONS=541} [2023-11-29 06:36:17,487 INFO L281 CegarLoopForPetriNet]: 22 programPoint places, 272 predicate places. [2023-11-29 06:36:17,487 INFO L495 AbstractCegarLoop]: Abstraction has has 294 places, 541 transitions, 10774 flow [2023-11-29 06:36:17,487 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 5.0) internal successors, (60), 12 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 06:36:17,487 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 06:36:17,487 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 06:36:17,492 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4bf5264f-ca7e-4100-a5c1-5c220218f14d/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Forceful destruction successful, exit code 0 [2023-11-29 06:36:17,687 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24,19 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4bf5264f-ca7e-4100-a5c1-5c220218f14d/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 06:36:17,688 INFO L420 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-29 06:36:17,688 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 06:36:17,688 INFO L85 PathProgramCache]: Analyzing trace with hash 961144048, now seen corresponding path program 9 times [2023-11-29 06:36:17,688 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 06:36:17,688 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1834752024] [2023-11-29 06:36:17,689 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 06:36:17,689 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 06:36:17,709 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 06:36:17,832 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-11-29 06:36:17,832 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 06:36:17,832 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1834752024] [2023-11-29 06:36:17,832 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1834752024] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 06:36:17,832 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1689084687] [2023-11-29 06:36:17,832 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-11-29 06:36:17,832 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 06:36:17,833 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4bf5264f-ca7e-4100-a5c1-5c220218f14d/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 06:36:17,833 INFO L229 MonitoredProcess]: Starting monitored process 20 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4bf5264f-ca7e-4100-a5c1-5c220218f14d/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 06:36:17,835 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4bf5264f-ca7e-4100-a5c1-5c220218f14d/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2023-11-29 06:36:17,997 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2023-11-29 06:36:17,997 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-29 06:36:17,998 INFO L262 TraceCheckSpWp]: Trace formula consists of 177 conjuncts, 9 conjunts are in the unsatisfiable core [2023-11-29 06:36:17,999 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 06:36:18,052 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-11-29 06:36:18,052 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 06:36:18,128 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-11-29 06:36:18,128 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1689084687] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 06:36:18,128 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 06:36:18,128 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 13 [2023-11-29 06:36:18,129 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1986273944] [2023-11-29 06:36:18,129 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 06:36:18,129 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2023-11-29 06:36:18,129 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 06:36:18,130 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2023-11-29 06:36:18,130 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=106, Unknown=0, NotChecked=0, Total=156 [2023-11-29 06:36:18,130 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 21 [2023-11-29 06:36:18,130 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 294 places, 541 transitions, 10774 flow. Second operand has 13 states, 13 states have (on average 4.923076923076923) internal successors, (64), 13 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 06:36:18,130 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 06:36:18,130 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 21 [2023-11-29 06:36:18,130 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 06:36:19,798 INFO L124 PetriNetUnfolderBase]: 1846/3673 cut-off events. [2023-11-29 06:36:19,798 INFO L125 PetriNetUnfolderBase]: For 51270/51270 co-relation queries the response was YES. [2023-11-29 06:36:19,815 INFO L83 FinitePrefix]: Finished finitePrefix Result has 27780 conditions, 3673 events. 1846/3673 cut-off events. For 51270/51270 co-relation queries the response was YES. Maximal size of possible extension queue 282. Compared 26666 event pairs, 95 based on Foata normal form. 8/3680 useless extension candidates. Maximal degree in co-relation 27618. Up to 1367 conditions per place. [2023-11-29 06:36:19,828 INFO L140 encePairwiseOnDemand]: 14/21 looper letters, 308 selfloop transitions, 356 changer transitions 0/665 dead transitions. [2023-11-29 06:36:19,828 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 307 places, 665 transitions, 13390 flow [2023-11-29 06:36:19,828 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2023-11-29 06:36:19,829 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2023-11-29 06:36:19,829 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 147 transitions. [2023-11-29 06:36:19,829 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4666666666666667 [2023-11-29 06:36:19,829 INFO L72 ComplementDD]: Start complementDD. Operand 15 states and 147 transitions. [2023-11-29 06:36:19,829 INFO L73 IsDeterministic]: Start isDeterministic. Operand 15 states and 147 transitions. [2023-11-29 06:36:19,829 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 06:36:19,829 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 15 states and 147 transitions. [2023-11-29 06:36:19,830 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 16 states, 15 states have (on average 9.8) internal successors, (147), 15 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 06:36:19,830 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 16 states, 16 states have (on average 21.0) internal successors, (336), 16 states have internal predecessors, (336), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 06:36:19,830 INFO L81 ComplementDD]: Finished complementDD. Result has 16 states, 16 states have (on average 21.0) internal successors, (336), 16 states have internal predecessors, (336), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 06:36:19,830 INFO L175 Difference]: Start difference. First operand has 294 places, 541 transitions, 10774 flow. Second operand 15 states and 147 transitions. [2023-11-29 06:36:19,831 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 307 places, 665 transitions, 13390 flow [2023-11-29 06:36:20,072 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 297 places, 665 transitions, 12986 flow, removed 19 selfloop flow, removed 10 redundant places. [2023-11-29 06:36:20,084 INFO L231 Difference]: Finished difference. Result has 297 places, 538 transitions, 11032 flow [2023-11-29 06:36:20,084 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=21, PETRI_DIFFERENCE_MINUEND_FLOW=10320, PETRI_DIFFERENCE_MINUEND_PLACES=283, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=538, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=356, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=182, PETRI_DIFFERENCE_SUBTRAHEND_STATES=15, PETRI_FLOW=11032, PETRI_PLACES=297, PETRI_TRANSITIONS=538} [2023-11-29 06:36:20,085 INFO L281 CegarLoopForPetriNet]: 22 programPoint places, 275 predicate places. [2023-11-29 06:36:20,085 INFO L495 AbstractCegarLoop]: Abstraction has has 297 places, 538 transitions, 11032 flow [2023-11-29 06:36:20,085 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 4.923076923076923) internal successors, (64), 13 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 06:36:20,085 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 06:36:20,085 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 06:36:20,089 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4bf5264f-ca7e-4100-a5c1-5c220218f14d/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Ended with exit code 0 [2023-11-29 06:36:20,285 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4bf5264f-ca7e-4100-a5c1-5c220218f14d/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable25 [2023-11-29 06:36:20,285 INFO L420 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-29 06:36:20,286 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 06:36:20,286 INFO L85 PathProgramCache]: Analyzing trace with hash 257859903, now seen corresponding path program 1 times [2023-11-29 06:36:20,286 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 06:36:20,286 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1301848489] [2023-11-29 06:36:20,286 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 06:36:20,286 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 06:36:20,301 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 06:36:20,470 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-11-29 06:36:20,470 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 06:36:20,470 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1301848489] [2023-11-29 06:36:20,471 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1301848489] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 06:36:20,471 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1425683052] [2023-11-29 06:36:20,471 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 06:36:20,471 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 06:36:20,471 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4bf5264f-ca7e-4100-a5c1-5c220218f14d/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 06:36:20,472 INFO L229 MonitoredProcess]: Starting monitored process 21 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4bf5264f-ca7e-4100-a5c1-5c220218f14d/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 06:36:20,472 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4bf5264f-ca7e-4100-a5c1-5c220218f14d/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2023-11-29 06:36:20,627 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 06:36:20,629 INFO L262 TraceCheckSpWp]: Trace formula consists of 183 conjuncts, 47 conjunts are in the unsatisfiable core [2023-11-29 06:36:20,632 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 06:36:20,661 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2023-11-29 06:36:20,687 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2023-11-29 06:36:21,086 INFO L349 Elim1Store]: treesize reduction 52, result has 40.2 percent of original size [2023-11-29 06:36:21,087 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 8 new quantified variables, introduced 10 case distinctions, treesize of input 230 treesize of output 171 [2023-11-29 06:36:21,447 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 06:36:21,447 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 06:36:23,322 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-11-29 06:36:23,323 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1425683052] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 06:36:23,323 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 06:36:23,323 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 10, 8] total 22 [2023-11-29 06:36:23,323 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [369521180] [2023-11-29 06:36:23,323 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 06:36:23,324 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2023-11-29 06:36:23,324 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 06:36:23,324 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2023-11-29 06:36:23,324 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=100, Invalid=362, Unknown=0, NotChecked=0, Total=462 [2023-11-29 06:36:23,325 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 21 [2023-11-29 06:36:23,325 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 297 places, 538 transitions, 11032 flow. Second operand has 22 states, 22 states have (on average 4.909090909090909) internal successors, (108), 22 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 06:36:23,325 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 06:36:23,325 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 21 [2023-11-29 06:36:23,325 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 06:36:36,555 INFO L124 PetriNetUnfolderBase]: 2357/4650 cut-off events. [2023-11-29 06:36:36,555 INFO L125 PetriNetUnfolderBase]: For 69366/69366 co-relation queries the response was YES. [2023-11-29 06:36:36,580 INFO L83 FinitePrefix]: Finished finitePrefix Result has 36660 conditions, 4650 events. 2357/4650 cut-off events. For 69366/69366 co-relation queries the response was YES. Maximal size of possible extension queue 362. Compared 35121 event pairs, 63 based on Foata normal form. 13/4661 useless extension candidates. Maximal degree in co-relation 36492. Up to 1919 conditions per place. [2023-11-29 06:36:36,598 INFO L140 encePairwiseOnDemand]: 9/21 looper letters, 454 selfloop transitions, 436 changer transitions 33/924 dead transitions. [2023-11-29 06:36:36,598 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 344 places, 924 transitions, 18262 flow [2023-11-29 06:36:36,599 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2023-11-29 06:36:36,599 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 48 states. [2023-11-29 06:36:36,600 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 457 transitions. [2023-11-29 06:36:36,600 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45337301587301587 [2023-11-29 06:36:36,600 INFO L72 ComplementDD]: Start complementDD. Operand 48 states and 457 transitions. [2023-11-29 06:36:36,600 INFO L73 IsDeterministic]: Start isDeterministic. Operand 48 states and 457 transitions. [2023-11-29 06:36:36,601 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 06:36:36,601 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 48 states and 457 transitions. [2023-11-29 06:36:36,601 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 49 states, 48 states have (on average 9.520833333333334) internal successors, (457), 48 states have internal predecessors, (457), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 06:36:36,603 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 49 states, 49 states have (on average 21.0) internal successors, (1029), 49 states have internal predecessors, (1029), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 06:36:36,603 INFO L81 ComplementDD]: Finished complementDD. Result has 49 states, 49 states have (on average 21.0) internal successors, (1029), 49 states have internal predecessors, (1029), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 06:36:36,603 INFO L175 Difference]: Start difference. First operand has 297 places, 538 transitions, 11032 flow. Second operand 48 states and 457 transitions. [2023-11-29 06:36:36,603 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 344 places, 924 transitions, 18262 flow [2023-11-29 06:36:37,020 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 334 places, 924 transitions, 17469 flow, removed 3 selfloop flow, removed 10 redundant places. [2023-11-29 06:36:37,037 INFO L231 Difference]: Finished difference. Result has 355 places, 714 transitions, 15610 flow [2023-11-29 06:36:37,038 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=21, PETRI_DIFFERENCE_MINUEND_FLOW=10461, PETRI_DIFFERENCE_MINUEND_PLACES=287, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=538, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=267, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=228, PETRI_DIFFERENCE_SUBTRAHEND_STATES=48, PETRI_FLOW=15610, PETRI_PLACES=355, PETRI_TRANSITIONS=714} [2023-11-29 06:36:37,038 INFO L281 CegarLoopForPetriNet]: 22 programPoint places, 333 predicate places. [2023-11-29 06:36:37,038 INFO L495 AbstractCegarLoop]: Abstraction has has 355 places, 714 transitions, 15610 flow [2023-11-29 06:36:37,038 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 4.909090909090909) internal successors, (108), 22 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 06:36:37,038 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 06:36:37,039 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 06:36:37,043 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4bf5264f-ca7e-4100-a5c1-5c220218f14d/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Ended with exit code 0 [2023-11-29 06:36:37,239 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4bf5264f-ca7e-4100-a5c1-5c220218f14d/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2023-11-29 06:36:37,239 INFO L420 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-29 06:36:37,239 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 06:36:37,239 INFO L85 PathProgramCache]: Analyzing trace with hash -817983724, now seen corresponding path program 11 times [2023-11-29 06:36:37,239 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 06:36:37,240 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [848241485] [2023-11-29 06:36:37,240 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 06:36:37,240 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 06:36:37,269 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 06:36:38,172 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 06:36:38,172 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 06:36:38,172 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [848241485] [2023-11-29 06:36:38,173 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [848241485] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 06:36:38,173 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [931908410] [2023-11-29 06:36:38,173 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-11-29 06:36:38,173 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 06:36:38,173 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4bf5264f-ca7e-4100-a5c1-5c220218f14d/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 06:36:38,174 INFO L229 MonitoredProcess]: Starting monitored process 22 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4bf5264f-ca7e-4100-a5c1-5c220218f14d/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 06:36:38,175 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4bf5264f-ca7e-4100-a5c1-5c220218f14d/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2023-11-29 06:36:38,288 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-11-29 06:36:38,288 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-29 06:36:38,290 INFO L262 TraceCheckSpWp]: Trace formula consists of 181 conjuncts, 29 conjunts are in the unsatisfiable core [2023-11-29 06:36:38,292 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 06:36:38,572 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-29 06:36:38,572 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 34 treesize of output 23 [2023-11-29 06:36:38,578 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-29 06:36:38,578 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 06:36:39,986 INFO L349 Elim1Store]: treesize reduction 10, result has 84.6 percent of original size [2023-11-29 06:36:39,986 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 6 new quantified variables, introduced 6 case distinctions, treesize of input 47 treesize of output 77 [2023-11-29 06:36:40,135 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-11-29 06:36:40,135 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [931908410] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 06:36:40,135 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 06:36:40,135 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9, 7] total 22 [2023-11-29 06:36:40,135 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [603888087] [2023-11-29 06:36:40,135 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 06:36:40,136 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2023-11-29 06:36:40,136 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 06:36:40,136 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2023-11-29 06:36:40,136 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=413, Unknown=0, NotChecked=0, Total=506 [2023-11-29 06:36:40,137 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 21 [2023-11-29 06:36:40,137 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 355 places, 714 transitions, 15610 flow. Second operand has 23 states, 23 states have (on average 4.869565217391305) internal successors, (112), 23 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 06:36:40,137 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 06:36:40,137 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 21 [2023-11-29 06:36:40,137 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 06:36:43,980 INFO L124 PetriNetUnfolderBase]: 2407/4610 cut-off events. [2023-11-29 06:36:43,980 INFO L125 PetriNetUnfolderBase]: For 79948/79948 co-relation queries the response was YES. [2023-11-29 06:36:44,008 INFO L83 FinitePrefix]: Finished finitePrefix Result has 39386 conditions, 4610 events. 2407/4610 cut-off events. For 79948/79948 co-relation queries the response was YES. Maximal size of possible extension queue 362. Compared 33788 event pairs, 19 based on Foata normal form. 4/4612 useless extension candidates. Maximal degree in co-relation 39163. Up to 2659 conditions per place. [2023-11-29 06:36:44,031 INFO L140 encePairwiseOnDemand]: 10/21 looper letters, 429 selfloop transitions, 470 changer transitions 21/921 dead transitions. [2023-11-29 06:36:44,031 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 392 places, 921 transitions, 19799 flow [2023-11-29 06:36:44,032 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2023-11-29 06:36:44,032 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 41 states. [2023-11-29 06:36:44,033 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 362 transitions. [2023-11-29 06:36:44,033 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42044134727061555 [2023-11-29 06:36:44,033 INFO L72 ComplementDD]: Start complementDD. Operand 41 states and 362 transitions. [2023-11-29 06:36:44,034 INFO L73 IsDeterministic]: Start isDeterministic. Operand 41 states and 362 transitions. [2023-11-29 06:36:44,034 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 06:36:44,034 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 41 states and 362 transitions. [2023-11-29 06:36:44,035 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 42 states, 41 states have (on average 8.829268292682928) internal successors, (362), 41 states have internal predecessors, (362), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 06:36:44,036 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 42 states, 42 states have (on average 21.0) internal successors, (882), 42 states have internal predecessors, (882), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 06:36:44,036 INFO L81 ComplementDD]: Finished complementDD. Result has 42 states, 42 states have (on average 21.0) internal successors, (882), 42 states have internal predecessors, (882), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 06:36:44,037 INFO L175 Difference]: Start difference. First operand has 355 places, 714 transitions, 15610 flow. Second operand 41 states and 362 transitions. [2023-11-29 06:36:44,037 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 392 places, 921 transitions, 19799 flow [2023-11-29 06:36:44,750 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 381 places, 921 transitions, 19152 flow, removed 229 selfloop flow, removed 11 redundant places. [2023-11-29 06:36:44,770 INFO L231 Difference]: Finished difference. Result has 391 places, 797 transitions, 18311 flow [2023-11-29 06:36:44,771 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=21, PETRI_DIFFERENCE_MINUEND_FLOW=15035, PETRI_DIFFERENCE_MINUEND_PLACES=341, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=714, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=388, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=282, PETRI_DIFFERENCE_SUBTRAHEND_STATES=41, PETRI_FLOW=18311, PETRI_PLACES=391, PETRI_TRANSITIONS=797} [2023-11-29 06:36:44,771 INFO L281 CegarLoopForPetriNet]: 22 programPoint places, 369 predicate places. [2023-11-29 06:36:44,771 INFO L495 AbstractCegarLoop]: Abstraction has has 391 places, 797 transitions, 18311 flow [2023-11-29 06:36:44,771 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 4.869565217391305) internal successors, (112), 23 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 06:36:44,772 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 06:36:44,772 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 06:36:44,778 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4bf5264f-ca7e-4100-a5c1-5c220218f14d/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Forceful destruction successful, exit code 0 [2023-11-29 06:36:44,972 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4bf5264f-ca7e-4100-a5c1-5c220218f14d/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27 [2023-11-29 06:36:44,972 INFO L420 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-29 06:36:44,972 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 06:36:44,973 INFO L85 PathProgramCache]: Analyzing trace with hash -1891069104, now seen corresponding path program 12 times [2023-11-29 06:36:44,973 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 06:36:44,973 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [957651672] [2023-11-29 06:36:44,973 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 06:36:44,973 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 06:36:45,001 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 06:36:45,586 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 06:36:45,586 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 06:36:45,586 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [957651672] [2023-11-29 06:36:45,586 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [957651672] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 06:36:45,586 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1642821699] [2023-11-29 06:36:45,587 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-11-29 06:36:45,587 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 06:36:45,587 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4bf5264f-ca7e-4100-a5c1-5c220218f14d/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 06:36:45,588 INFO L229 MonitoredProcess]: Starting monitored process 23 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4bf5264f-ca7e-4100-a5c1-5c220218f14d/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 06:36:45,590 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4bf5264f-ca7e-4100-a5c1-5c220218f14d/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2023-11-29 06:36:45,775 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2023-11-29 06:36:45,775 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-29 06:36:45,777 INFO L262 TraceCheckSpWp]: Trace formula consists of 181 conjuncts, 29 conjunts are in the unsatisfiable core [2023-11-29 06:36:45,779 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 06:36:46,050 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-29 06:36:46,050 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 34 treesize of output 23 [2023-11-29 06:36:46,056 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-29 06:36:46,057 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 06:36:46,852 INFO L349 Elim1Store]: treesize reduction 10, result has 84.6 percent of original size [2023-11-29 06:36:46,852 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 6 new quantified variables, introduced 6 case distinctions, treesize of input 47 treesize of output 77 [2023-11-29 06:36:46,927 INFO L349 Elim1Store]: treesize reduction 5, result has 84.8 percent of original size [2023-11-29 06:36:46,927 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 27 treesize of output 39 [2023-11-29 06:36:46,951 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-29 06:36:46,951 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 19 treesize of output 24 [2023-11-29 06:36:47,064 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-11-29 06:36:47,065 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1642821699] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 06:36:47,065 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 06:36:47,065 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9, 7] total 22 [2023-11-29 06:36:47,065 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1548510063] [2023-11-29 06:36:47,065 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 06:36:47,065 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2023-11-29 06:36:47,066 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 06:36:47,066 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2023-11-29 06:36:47,067 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=109, Invalid=397, Unknown=0, NotChecked=0, Total=506 [2023-11-29 06:36:47,067 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 21 [2023-11-29 06:36:47,067 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 391 places, 797 transitions, 18311 flow. Second operand has 23 states, 23 states have (on average 4.869565217391305) internal successors, (112), 23 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 06:36:47,067 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 06:36:47,067 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 21 [2023-11-29 06:36:47,067 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 06:36:50,395 INFO L124 PetriNetUnfolderBase]: 2436/4645 cut-off events. [2023-11-29 06:36:50,395 INFO L125 PetriNetUnfolderBase]: For 96543/96543 co-relation queries the response was YES. [2023-11-29 06:36:50,430 INFO L83 FinitePrefix]: Finished finitePrefix Result has 41888 conditions, 4645 events. 2436/4645 cut-off events. For 96543/96543 co-relation queries the response was YES. Maximal size of possible extension queue 346. Compared 33754 event pairs, 20 based on Foata normal form. 4/4649 useless extension candidates. Maximal degree in co-relation 41654. Up to 2956 conditions per place. [2023-11-29 06:36:50,453 INFO L140 encePairwiseOnDemand]: 11/21 looper letters, 511 selfloop transitions, 382 changer transitions 19/913 dead transitions. [2023-11-29 06:36:50,453 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 422 places, 913 transitions, 21062 flow [2023-11-29 06:36:50,453 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2023-11-29 06:36:50,453 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 37 states. [2023-11-29 06:36:50,454 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 311 transitions. [2023-11-29 06:36:50,454 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.40025740025740025 [2023-11-29 06:36:50,454 INFO L72 ComplementDD]: Start complementDD. Operand 37 states and 311 transitions. [2023-11-29 06:36:50,454 INFO L73 IsDeterministic]: Start isDeterministic. Operand 37 states and 311 transitions. [2023-11-29 06:36:50,454 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 06:36:50,454 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 37 states and 311 transitions. [2023-11-29 06:36:50,455 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 38 states, 37 states have (on average 8.405405405405405) internal successors, (311), 37 states have internal predecessors, (311), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 06:36:50,456 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 38 states, 38 states have (on average 21.0) internal successors, (798), 38 states have internal predecessors, (798), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 06:36:50,456 INFO L81 ComplementDD]: Finished complementDD. Result has 38 states, 38 states have (on average 21.0) internal successors, (798), 38 states have internal predecessors, (798), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 06:36:50,456 INFO L175 Difference]: Start difference. First operand has 391 places, 797 transitions, 18311 flow. Second operand 37 states and 311 transitions. [2023-11-29 06:36:50,457 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 422 places, 913 transitions, 21062 flow [2023-11-29 06:36:51,437 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 405 places, 913 transitions, 20619 flow, removed 96 selfloop flow, removed 17 redundant places. [2023-11-29 06:36:51,459 INFO L231 Difference]: Finished difference. Result has 412 places, 814 transitions, 19629 flow [2023-11-29 06:36:51,460 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=21, PETRI_DIFFERENCE_MINUEND_FLOW=17901, PETRI_DIFFERENCE_MINUEND_PLACES=369, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=797, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=362, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=424, PETRI_DIFFERENCE_SUBTRAHEND_STATES=37, PETRI_FLOW=19629, PETRI_PLACES=412, PETRI_TRANSITIONS=814} [2023-11-29 06:36:51,460 INFO L281 CegarLoopForPetriNet]: 22 programPoint places, 390 predicate places. [2023-11-29 06:36:51,461 INFO L495 AbstractCegarLoop]: Abstraction has has 412 places, 814 transitions, 19629 flow [2023-11-29 06:36:51,461 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 4.869565217391305) internal successors, (112), 23 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 06:36:51,461 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 06:36:51,461 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 06:36:51,466 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4bf5264f-ca7e-4100-a5c1-5c220218f14d/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Ended with exit code 0 [2023-11-29 06:36:51,661 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 23 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4bf5264f-ca7e-4100-a5c1-5c220218f14d/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2023-11-29 06:36:51,661 INFO L420 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-29 06:36:51,662 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 06:36:51,662 INFO L85 PathProgramCache]: Analyzing trace with hash 1087740888, now seen corresponding path program 13 times [2023-11-29 06:36:51,662 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 06:36:51,662 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [536059863] [2023-11-29 06:36:51,662 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 06:36:51,662 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 06:36:51,685 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 06:36:52,338 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 06:36:52,338 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 06:36:52,339 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [536059863] [2023-11-29 06:36:52,339 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [536059863] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 06:36:52,339 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1552645637] [2023-11-29 06:36:52,339 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-11-29 06:36:52,339 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 06:36:52,339 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4bf5264f-ca7e-4100-a5c1-5c220218f14d/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 06:36:52,340 INFO L229 MonitoredProcess]: Starting monitored process 24 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4bf5264f-ca7e-4100-a5c1-5c220218f14d/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 06:36:52,341 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4bf5264f-ca7e-4100-a5c1-5c220218f14d/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Waiting until timeout for monitored process [2023-11-29 06:36:52,495 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 06:36:52,497 INFO L262 TraceCheckSpWp]: Trace formula consists of 181 conjuncts, 37 conjunts are in the unsatisfiable core [2023-11-29 06:36:52,500 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 06:36:52,524 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2023-11-29 06:36:52,545 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2023-11-29 06:36:52,780 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-29 06:36:52,780 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 34 treesize of output 23 [2023-11-29 06:36:52,787 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 06:36:52,787 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 06:36:58,163 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 122 treesize of output 112 [2023-11-29 06:36:58,363 INFO L349 Elim1Store]: treesize reduction 5, result has 96.7 percent of original size [2023-11-29 06:36:58,363 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 8 new quantified variables, introduced 15 case distinctions, treesize of input 55573 treesize of output 47684 [2023-11-29 06:41:51,088 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 06:41:51,088 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1552645637] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 06:41:51,088 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 06:41:51,088 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 26 [2023-11-29 06:41:51,089 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [377792327] [2023-11-29 06:41:51,089 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 06:41:51,089 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2023-11-29 06:41:51,089 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 06:41:51,090 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2023-11-29 06:41:51,090 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=162, Invalid=539, Unknown=1, NotChecked=0, Total=702 [2023-11-29 06:41:51,090 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 21 [2023-11-29 06:41:51,090 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 412 places, 814 transitions, 19629 flow. Second operand has 27 states, 27 states have (on average 4.62962962962963) internal successors, (125), 27 states have internal predecessors, (125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 06:41:51,090 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 06:41:51,090 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 21 [2023-11-29 06:41:51,090 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 06:41:54,805 INFO L124 PetriNetUnfolderBase]: 2434/4638 cut-off events. [2023-11-29 06:41:54,806 INFO L125 PetriNetUnfolderBase]: For 112152/112152 co-relation queries the response was YES. [2023-11-29 06:41:54,834 INFO L83 FinitePrefix]: Finished finitePrefix Result has 44082 conditions, 4638 events. 2434/4638 cut-off events. For 112152/112152 co-relation queries the response was YES. Maximal size of possible extension queue 367. Compared 33797 event pairs, 20 based on Foata normal form. 2/4640 useless extension candidates. Maximal degree in co-relation 43848. Up to 2959 conditions per place. [2023-11-29 06:41:54,856 INFO L140 encePairwiseOnDemand]: 11/21 looper letters, 536 selfloop transitions, 345 changer transitions 18/900 dead transitions. [2023-11-29 06:41:54,856 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 441 places, 900 transitions, 21871 flow [2023-11-29 06:41:54,857 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2023-11-29 06:41:54,857 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2023-11-29 06:41:54,857 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 277 transitions. [2023-11-29 06:41:54,858 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.38795518207282914 [2023-11-29 06:41:54,858 INFO L72 ComplementDD]: Start complementDD. Operand 34 states and 277 transitions. [2023-11-29 06:41:54,858 INFO L73 IsDeterministic]: Start isDeterministic. Operand 34 states and 277 transitions. [2023-11-29 06:41:54,858 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 06:41:54,858 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 34 states and 277 transitions. [2023-11-29 06:41:54,859 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 35 states, 34 states have (on average 8.147058823529411) internal successors, (277), 34 states have internal predecessors, (277), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 06:41:54,861 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 35 states, 35 states have (on average 21.0) internal successors, (735), 35 states have internal predecessors, (735), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 06:41:54,861 INFO L81 ComplementDD]: Finished complementDD. Result has 35 states, 35 states have (on average 21.0) internal successors, (735), 35 states have internal predecessors, (735), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 06:41:54,861 INFO L175 Difference]: Start difference. First operand has 412 places, 814 transitions, 19629 flow. Second operand 34 states and 277 transitions. [2023-11-29 06:41:54,861 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 441 places, 900 transitions, 21871 flow [2023-11-29 06:41:56,026 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 414 places, 900 transitions, 21554 flow, removed 42 selfloop flow, removed 27 redundant places. [2023-11-29 06:41:56,047 INFO L231 Difference]: Finished difference. Result has 416 places, 810 transitions, 19940 flow [2023-11-29 06:41:56,048 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=21, PETRI_DIFFERENCE_MINUEND_FLOW=19328, PETRI_DIFFERENCE_MINUEND_PLACES=381, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=814, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=345, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=469, PETRI_DIFFERENCE_SUBTRAHEND_STATES=34, PETRI_FLOW=19940, PETRI_PLACES=416, PETRI_TRANSITIONS=810} [2023-11-29 06:41:56,048 INFO L281 CegarLoopForPetriNet]: 22 programPoint places, 394 predicate places. [2023-11-29 06:41:56,048 INFO L495 AbstractCegarLoop]: Abstraction has has 416 places, 810 transitions, 19940 flow [2023-11-29 06:41:56,048 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 4.62962962962963) internal successors, (125), 27 states have internal predecessors, (125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 06:41:56,048 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 06:41:56,049 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 06:41:56,054 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4bf5264f-ca7e-4100-a5c1-5c220218f14d/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Ended with exit code 0 [2023-11-29 06:41:56,249 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,24 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4bf5264f-ca7e-4100-a5c1-5c220218f14d/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 06:41:56,249 INFO L420 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-29 06:41:56,249 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 06:41:56,250 INFO L85 PathProgramCache]: Analyzing trace with hash -2144724517, now seen corresponding path program 2 times [2023-11-29 06:41:56,250 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 06:41:56,250 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1676748150] [2023-11-29 06:41:56,250 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 06:41:56,250 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 06:41:56,265 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 06:41:56,461 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-11-29 06:41:56,462 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 06:41:56,462 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1676748150] [2023-11-29 06:41:56,462 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1676748150] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 06:41:56,463 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1727494348] [2023-11-29 06:41:56,463 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-29 06:41:56,464 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 06:41:56,464 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4bf5264f-ca7e-4100-a5c1-5c220218f14d/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 06:41:56,465 INFO L229 MonitoredProcess]: Starting monitored process 25 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4bf5264f-ca7e-4100-a5c1-5c220218f14d/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 06:41:56,469 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4bf5264f-ca7e-4100-a5c1-5c220218f14d/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Waiting until timeout for monitored process [2023-11-29 06:41:56,678 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-11-29 06:41:56,678 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-29 06:41:56,679 INFO L262 TraceCheckSpWp]: Trace formula consists of 183 conjuncts, 43 conjunts are in the unsatisfiable core [2023-11-29 06:41:56,682 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 06:41:56,729 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2023-11-29 06:41:57,482 INFO L349 Elim1Store]: treesize reduction 37, result has 57.5 percent of original size [2023-11-29 06:41:57,482 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 8 new quantified variables, introduced 10 case distinctions, treesize of input 241 treesize of output 197 [2023-11-29 06:41:59,023 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 06:41:59,023 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 06:42:00,392 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 170 treesize of output 150 [2023-11-29 06:42:00,537 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-29 06:42:00,537 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 9 new quantified variables, introduced 15 case distinctions, treesize of input 548 treesize of output 488 [2023-11-29 06:42:10,518 WARN L667 sPolynomialRelations]: Constructing 64(two to the power of 6 dual juncts. [2023-11-29 06:42:11,377 WARN L667 sPolynomialRelations]: Constructing 128(two to the power of 7 dual juncts. [2023-11-29 06:42:13,955 WARN L667 sPolynomialRelations]: Constructing 64(two to the power of 6 dual juncts. [2023-11-29 06:42:14,997 WARN L667 sPolynomialRelations]: Constructing 128(two to the power of 7 dual juncts. [2023-11-29 06:42:18,408 WARN L667 sPolynomialRelations]: Constructing 64(two to the power of 6 dual juncts. [2023-11-29 06:43:29,397 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 06:43:29,397 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1727494348] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 06:43:29,397 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 06:43:29,397 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 11, 11] total 27 [2023-11-29 06:43:29,398 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1352072946] [2023-11-29 06:43:29,398 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 06:43:29,398 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2023-11-29 06:43:29,398 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 06:43:29,399 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2023-11-29 06:43:29,399 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=134, Invalid=568, Unknown=0, NotChecked=0, Total=702 [2023-11-29 06:43:29,399 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 21 [2023-11-29 06:43:29,399 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 416 places, 810 transitions, 19940 flow. Second operand has 27 states, 27 states have (on average 4.962962962962963) internal successors, (134), 27 states have internal predecessors, (134), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 06:43:29,399 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 06:43:29,399 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 21 [2023-11-29 06:43:29,399 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 06:43:35,485 INFO L124 PetriNetUnfolderBase]: 2678/5275 cut-off events. [2023-11-29 06:43:35,485 INFO L125 PetriNetUnfolderBase]: For 135196/135196 co-relation queries the response was YES. [2023-11-29 06:43:35,521 INFO L83 FinitePrefix]: Finished finitePrefix Result has 50264 conditions, 5275 events. 2678/5275 cut-off events. For 135196/135196 co-relation queries the response was YES. Maximal size of possible extension queue 436. Compared 40837 event pairs, 88 based on Foata normal form. 12/5287 useless extension candidates. Maximal degree in co-relation 50031. Up to 2233 conditions per place. [2023-11-29 06:43:35,545 INFO L140 encePairwiseOnDemand]: 10/21 looper letters, 554 selfloop transitions, 476 changer transitions 4/1035 dead transitions. [2023-11-29 06:43:35,545 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 451 places, 1035 transitions, 25114 flow [2023-11-29 06:43:35,546 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2023-11-29 06:43:35,546 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 42 states. [2023-11-29 06:43:35,547 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 364 transitions. [2023-11-29 06:43:35,547 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4126984126984127 [2023-11-29 06:43:35,547 INFO L72 ComplementDD]: Start complementDD. Operand 42 states and 364 transitions. [2023-11-29 06:43:35,547 INFO L73 IsDeterministic]: Start isDeterministic. Operand 42 states and 364 transitions. [2023-11-29 06:43:35,547 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 06:43:35,547 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 42 states and 364 transitions. [2023-11-29 06:43:35,548 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 43 states, 42 states have (on average 8.666666666666666) internal successors, (364), 42 states have internal predecessors, (364), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 06:43:35,549 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 43 states, 43 states have (on average 21.0) internal successors, (903), 43 states have internal predecessors, (903), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 06:43:35,549 INFO L81 ComplementDD]: Finished complementDD. Result has 43 states, 43 states have (on average 21.0) internal successors, (903), 43 states have internal predecessors, (903), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 06:43:35,549 INFO L175 Difference]: Start difference. First operand has 416 places, 810 transitions, 19940 flow. Second operand 42 states and 364 transitions. [2023-11-29 06:43:35,549 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 451 places, 1035 transitions, 25114 flow [2023-11-29 06:43:36,816 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 428 places, 1035 transitions, 24709 flow, removed 22 selfloop flow, removed 23 redundant places. [2023-11-29 06:43:36,838 INFO L231 Difference]: Finished difference. Result has 439 places, 900 transitions, 23562 flow [2023-11-29 06:43:36,839 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=21, PETRI_DIFFERENCE_MINUEND_FLOW=19607, PETRI_DIFFERENCE_MINUEND_PLACES=387, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=810, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=392, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=377, PETRI_DIFFERENCE_SUBTRAHEND_STATES=42, PETRI_FLOW=23562, PETRI_PLACES=439, PETRI_TRANSITIONS=900} [2023-11-29 06:43:36,839 INFO L281 CegarLoopForPetriNet]: 22 programPoint places, 417 predicate places. [2023-11-29 06:43:36,839 INFO L495 AbstractCegarLoop]: Abstraction has has 439 places, 900 transitions, 23562 flow [2023-11-29 06:43:36,839 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 4.962962962962963) internal successors, (134), 27 states have internal predecessors, (134), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 06:43:36,840 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 06:43:36,840 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 06:43:36,844 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4bf5264f-ca7e-4100-a5c1-5c220218f14d/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Forceful destruction successful, exit code 0 [2023-11-29 06:43:37,040 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30,25 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4bf5264f-ca7e-4100-a5c1-5c220218f14d/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 06:43:37,040 INFO L420 AbstractCegarLoop]: === Iteration 32 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-29 06:43:37,040 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 06:43:37,040 INFO L85 PathProgramCache]: Analyzing trace with hash 46164820, now seen corresponding path program 14 times [2023-11-29 06:43:37,041 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 06:43:37,041 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2071647778] [2023-11-29 06:43:37,041 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 06:43:37,041 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 06:43:37,060 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 06:43:37,720 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 06:43:37,720 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 06:43:37,720 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2071647778] [2023-11-29 06:43:37,720 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2071647778] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 06:43:37,720 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [285352397] [2023-11-29 06:43:37,720 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-29 06:43:37,720 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 06:43:37,720 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4bf5264f-ca7e-4100-a5c1-5c220218f14d/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 06:43:37,721 INFO L229 MonitoredProcess]: Starting monitored process 26 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4bf5264f-ca7e-4100-a5c1-5c220218f14d/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 06:43:37,722 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4bf5264f-ca7e-4100-a5c1-5c220218f14d/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Waiting until timeout for monitored process [2023-11-29 06:43:37,858 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-11-29 06:43:37,858 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-29 06:43:37,859 INFO L262 TraceCheckSpWp]: Trace formula consists of 181 conjuncts, 30 conjunts are in the unsatisfiable core [2023-11-29 06:43:37,861 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 06:43:38,140 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-29 06:43:38,141 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 34 treesize of output 23 [2023-11-29 06:43:38,147 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-29 06:43:38,147 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 06:43:38,396 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-29 06:43:38,397 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 5 new quantified variables, introduced 6 case distinctions, treesize of input 162 treesize of output 198 [2023-11-29 06:43:39,283 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-11-29 06:43:39,283 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [285352397] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 06:43:39,283 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 06:43:39,283 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9, 7] total 22 [2023-11-29 06:43:39,284 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1637992148] [2023-11-29 06:43:39,284 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 06:43:39,284 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2023-11-29 06:43:39,284 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 06:43:39,284 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2023-11-29 06:43:39,285 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=91, Invalid=415, Unknown=0, NotChecked=0, Total=506 [2023-11-29 06:43:39,285 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 21 [2023-11-29 06:43:39,285 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 439 places, 900 transitions, 23562 flow. Second operand has 23 states, 23 states have (on average 4.869565217391305) internal successors, (112), 23 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 06:43:39,285 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 06:43:39,285 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 21 [2023-11-29 06:43:39,285 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 06:43:42,617 INFO L124 PetriNetUnfolderBase]: 2816/5555 cut-off events. [2023-11-29 06:43:42,618 INFO L125 PetriNetUnfolderBase]: For 159106/159106 co-relation queries the response was YES. [2023-11-29 06:43:42,661 INFO L83 FinitePrefix]: Finished finitePrefix Result has 55361 conditions, 5555 events. 2816/5555 cut-off events. For 159106/159106 co-relation queries the response was YES. Maximal size of possible extension queue 438. Compared 43161 event pairs, 33 based on Foata normal form. 2/5557 useless extension candidates. Maximal degree in co-relation 55120. Up to 2693 conditions per place. [2023-11-29 06:43:42,693 INFO L140 encePairwiseOnDemand]: 11/21 looper letters, 575 selfloop transitions, 393 changer transitions 22/991 dead transitions. [2023-11-29 06:43:42,693 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 463 places, 991 transitions, 26497 flow [2023-11-29 06:43:42,694 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2023-11-29 06:43:42,694 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 25 states. [2023-11-29 06:43:42,694 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 204 transitions. [2023-11-29 06:43:42,695 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.38857142857142857 [2023-11-29 06:43:42,695 INFO L72 ComplementDD]: Start complementDD. Operand 25 states and 204 transitions. [2023-11-29 06:43:42,695 INFO L73 IsDeterministic]: Start isDeterministic. Operand 25 states and 204 transitions. [2023-11-29 06:43:42,695 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 06:43:42,695 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 25 states and 204 transitions. [2023-11-29 06:43:42,696 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 26 states, 25 states have (on average 8.16) internal successors, (204), 25 states have internal predecessors, (204), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 06:43:42,697 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 26 states, 26 states have (on average 21.0) internal successors, (546), 26 states have internal predecessors, (546), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 06:43:42,697 INFO L81 ComplementDD]: Finished complementDD. Result has 26 states, 26 states have (on average 21.0) internal successors, (546), 26 states have internal predecessors, (546), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 06:43:42,697 INFO L175 Difference]: Start difference. First operand has 439 places, 900 transitions, 23562 flow. Second operand 25 states and 204 transitions. [2023-11-29 06:43:42,697 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 463 places, 991 transitions, 26497 flow [2023-11-29 06:43:44,252 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 442 places, 991 transitions, 26144 flow, removed 126 selfloop flow, removed 21 redundant places. [2023-11-29 06:43:44,280 INFO L231 Difference]: Finished difference. Result has 445 places, 921 transitions, 24701 flow [2023-11-29 06:43:44,281 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=21, PETRI_DIFFERENCE_MINUEND_FLOW=23223, PETRI_DIFFERENCE_MINUEND_PLACES=418, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=900, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=362, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=507, PETRI_DIFFERENCE_SUBTRAHEND_STATES=25, PETRI_FLOW=24701, PETRI_PLACES=445, PETRI_TRANSITIONS=921} [2023-11-29 06:43:44,281 INFO L281 CegarLoopForPetriNet]: 22 programPoint places, 423 predicate places. [2023-11-29 06:43:44,281 INFO L495 AbstractCegarLoop]: Abstraction has has 445 places, 921 transitions, 24701 flow [2023-11-29 06:43:44,281 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 4.869565217391305) internal successors, (112), 23 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 06:43:44,282 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 06:43:44,282 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 06:43:44,286 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4bf5264f-ca7e-4100-a5c1-5c220218f14d/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Ended with exit code 0 [2023-11-29 06:43:44,482 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31,26 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4bf5264f-ca7e-4100-a5c1-5c220218f14d/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 06:43:44,482 INFO L420 AbstractCegarLoop]: === Iteration 33 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-29 06:43:44,482 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 06:43:44,483 INFO L85 PathProgramCache]: Analyzing trace with hash 1897551926, now seen corresponding path program 15 times [2023-11-29 06:43:44,483 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 06:43:44,483 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1140006481] [2023-11-29 06:43:44,483 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 06:43:44,483 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 06:43:44,507 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 06:43:45,050 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 06:43:45,050 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 06:43:45,050 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1140006481] [2023-11-29 06:43:45,051 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1140006481] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 06:43:45,051 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [675444068] [2023-11-29 06:43:45,051 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-11-29 06:43:45,051 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 06:43:45,051 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4bf5264f-ca7e-4100-a5c1-5c220218f14d/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 06:43:45,052 INFO L229 MonitoredProcess]: Starting monitored process 27 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4bf5264f-ca7e-4100-a5c1-5c220218f14d/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 06:43:45,061 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4bf5264f-ca7e-4100-a5c1-5c220218f14d/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Waiting until timeout for monitored process [2023-11-29 06:43:45,246 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2023-11-29 06:43:45,246 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-29 06:43:45,248 INFO L262 TraceCheckSpWp]: Trace formula consists of 181 conjuncts, 33 conjunts are in the unsatisfiable core [2023-11-29 06:43:45,249 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 06:43:45,503 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-29 06:43:45,503 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 34 treesize of output 23 [2023-11-29 06:43:45,533 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-29 06:43:45,534 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 06:43:46,146 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-29 06:43:46,147 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 6 new quantified variables, introduced 6 case distinctions, treesize of input 140 treesize of output 141 [2023-11-29 06:43:47,985 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-11-29 06:43:47,985 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [675444068] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 06:43:47,985 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 06:43:47,985 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10, 8] total 23 [2023-11-29 06:43:47,986 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [930944266] [2023-11-29 06:43:47,986 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 06:43:47,986 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2023-11-29 06:43:47,986 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 06:43:47,986 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2023-11-29 06:43:47,987 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=111, Invalid=441, Unknown=0, NotChecked=0, Total=552 [2023-11-29 06:43:47,987 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 21 [2023-11-29 06:43:47,987 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 445 places, 921 transitions, 24701 flow. Second operand has 24 states, 24 states have (on average 4.875) internal successors, (117), 24 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 06:43:47,987 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 06:43:47,987 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 21 [2023-11-29 06:43:47,987 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 06:43:54,686 INFO L124 PetriNetUnfolderBase]: 2959/5838 cut-off events. [2023-11-29 06:43:54,686 INFO L125 PetriNetUnfolderBase]: For 195725/195725 co-relation queries the response was YES. [2023-11-29 06:43:54,727 INFO L83 FinitePrefix]: Finished finitePrefix Result has 60716 conditions, 5838 events. 2959/5838 cut-off events. For 195725/195725 co-relation queries the response was YES. Maximal size of possible extension queue 470. Compared 45900 event pairs, 89 based on Foata normal form. 5/5843 useless extension candidates. Maximal degree in co-relation 60473. Up to 3386 conditions per place. [2023-11-29 06:43:54,756 INFO L140 encePairwiseOnDemand]: 10/21 looper letters, 638 selfloop transitions, 418 changer transitions 16/1073 dead transitions. [2023-11-29 06:43:54,756 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 471 places, 1073 transitions, 29203 flow [2023-11-29 06:43:54,757 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2023-11-29 06:43:54,757 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 37 states. [2023-11-29 06:43:54,758 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 299 transitions. [2023-11-29 06:43:54,758 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.38481338481338484 [2023-11-29 06:43:54,758 INFO L72 ComplementDD]: Start complementDD. Operand 37 states and 299 transitions. [2023-11-29 06:43:54,758 INFO L73 IsDeterministic]: Start isDeterministic. Operand 37 states and 299 transitions. [2023-11-29 06:43:54,758 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 06:43:54,758 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 37 states and 299 transitions. [2023-11-29 06:43:54,759 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 38 states, 37 states have (on average 8.08108108108108) internal successors, (299), 37 states have internal predecessors, (299), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 06:43:54,760 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 38 states, 38 states have (on average 21.0) internal successors, (798), 38 states have internal predecessors, (798), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 06:43:54,760 INFO L81 ComplementDD]: Finished complementDD. Result has 38 states, 38 states have (on average 21.0) internal successors, (798), 38 states have internal predecessors, (798), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 06:43:54,760 INFO L175 Difference]: Start difference. First operand has 445 places, 921 transitions, 24701 flow. Second operand 37 states and 299 transitions. [2023-11-29 06:43:54,760 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 471 places, 1073 transitions, 29203 flow [2023-11-29 06:43:56,577 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 453 places, 1073 transitions, 28509 flow, removed 128 selfloop flow, removed 18 redundant places. [2023-11-29 06:43:56,602 INFO L231 Difference]: Finished difference. Result has 461 places, 978 transitions, 27336 flow [2023-11-29 06:43:56,603 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=21, PETRI_DIFFERENCE_MINUEND_FLOW=24082, PETRI_DIFFERENCE_MINUEND_PLACES=417, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=921, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=359, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=518, PETRI_DIFFERENCE_SUBTRAHEND_STATES=37, PETRI_FLOW=27336, PETRI_PLACES=461, PETRI_TRANSITIONS=978} [2023-11-29 06:43:56,603 INFO L281 CegarLoopForPetriNet]: 22 programPoint places, 439 predicate places. [2023-11-29 06:43:56,603 INFO L495 AbstractCegarLoop]: Abstraction has has 461 places, 978 transitions, 27336 flow [2023-11-29 06:43:56,603 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 4.875) internal successors, (117), 24 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 06:43:56,603 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 06:43:56,603 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 06:43:56,608 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4bf5264f-ca7e-4100-a5c1-5c220218f14d/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Forceful destruction successful, exit code 0 [2023-11-29 06:43:56,804 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4bf5264f-ca7e-4100-a5c1-5c220218f14d/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable32 [2023-11-29 06:43:56,804 INFO L420 AbstractCegarLoop]: === Iteration 34 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-29 06:43:56,804 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 06:43:56,804 INFO L85 PathProgramCache]: Analyzing trace with hash -1708241248, now seen corresponding path program 3 times [2023-11-29 06:43:56,804 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 06:43:56,804 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1913384689] [2023-11-29 06:43:56,804 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 06:43:56,805 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 06:43:56,824 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 06:43:56,971 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-11-29 06:43:56,971 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 06:43:56,971 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1913384689] [2023-11-29 06:43:56,971 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1913384689] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 06:43:56,971 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1849536051] [2023-11-29 06:43:56,971 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-11-29 06:43:56,972 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 06:43:56,972 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4bf5264f-ca7e-4100-a5c1-5c220218f14d/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 06:43:56,972 INFO L229 MonitoredProcess]: Starting monitored process 28 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4bf5264f-ca7e-4100-a5c1-5c220218f14d/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 06:43:56,973 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4bf5264f-ca7e-4100-a5c1-5c220218f14d/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Waiting until timeout for monitored process [2023-11-29 06:43:57,161 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2023-11-29 06:43:57,161 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-29 06:43:57,163 INFO L262 TraceCheckSpWp]: Trace formula consists of 189 conjuncts, 50 conjunts are in the unsatisfiable core [2023-11-29 06:43:57,166 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 06:43:57,226 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2023-11-29 06:43:57,557 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 06:43:57,557 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 06:44:00,499 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-11-29 06:44:00,499 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1849536051] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 06:44:00,499 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 06:44:00,499 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 10, 9] total 24 [2023-11-29 06:44:00,499 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [50917658] [2023-11-29 06:44:00,499 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 06:44:00,499 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2023-11-29 06:44:00,500 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 06:44:00,500 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2023-11-29 06:44:00,500 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=99, Invalid=453, Unknown=0, NotChecked=0, Total=552 [2023-11-29 06:44:00,500 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 21 [2023-11-29 06:44:00,500 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 461 places, 978 transitions, 27336 flow. Second operand has 24 states, 24 states have (on average 5.0) internal successors, (120), 24 states have internal predecessors, (120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 06:44:00,500 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 06:44:00,501 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 21 [2023-11-29 06:44:00,501 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 06:44:20,211 INFO L124 PetriNetUnfolderBase]: 2977/5941 cut-off events. [2023-11-29 06:44:20,211 INFO L125 PetriNetUnfolderBase]: For 224795/224795 co-relation queries the response was YES. [2023-11-29 06:44:20,256 INFO L83 FinitePrefix]: Finished finitePrefix Result has 62520 conditions, 5941 events. 2977/5941 cut-off events. For 224795/224795 co-relation queries the response was YES. Maximal size of possible extension queue 485. Compared 47581 event pairs, 41 based on Foata normal form. 124/6065 useless extension candidates. Maximal degree in co-relation 62275. Up to 1441 conditions per place. [2023-11-29 06:44:20,286 INFO L140 encePairwiseOnDemand]: 10/21 looper letters, 464 selfloop transitions, 723 changer transitions 39/1227 dead transitions. [2023-11-29 06:44:20,287 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 513 places, 1227 transitions, 31995 flow [2023-11-29 06:44:20,287 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 56 states. [2023-11-29 06:44:20,287 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 56 states. [2023-11-29 06:44:20,288 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 492 transitions. [2023-11-29 06:44:20,288 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41836734693877553 [2023-11-29 06:44:20,288 INFO L72 ComplementDD]: Start complementDD. Operand 56 states and 492 transitions. [2023-11-29 06:44:20,288 INFO L73 IsDeterministic]: Start isDeterministic. Operand 56 states and 492 transitions. [2023-11-29 06:44:20,289 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 06:44:20,289 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 56 states and 492 transitions. [2023-11-29 06:44:20,290 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 57 states, 56 states have (on average 8.785714285714286) internal successors, (492), 56 states have internal predecessors, (492), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 06:44:20,291 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 57 states, 57 states have (on average 21.0) internal successors, (1197), 57 states have internal predecessors, (1197), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 06:44:20,292 INFO L81 ComplementDD]: Finished complementDD. Result has 57 states, 57 states have (on average 21.0) internal successors, (1197), 57 states have internal predecessors, (1197), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 06:44:20,292 INFO L175 Difference]: Start difference. First operand has 461 places, 978 transitions, 27336 flow. Second operand 56 states and 492 transitions. [2023-11-29 06:44:20,292 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 513 places, 1227 transitions, 31995 flow [2023-11-29 06:44:22,363 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 489 places, 1227 transitions, 31767 flow, removed 47 selfloop flow, removed 24 redundant places. [2023-11-29 06:44:22,390 INFO L231 Difference]: Finished difference. Result has 496 places, 1003 transitions, 29308 flow [2023-11-29 06:44:22,391 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=21, PETRI_DIFFERENCE_MINUEND_FLOW=25922, PETRI_DIFFERENCE_MINUEND_PLACES=434, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=949, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=661, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=272, PETRI_DIFFERENCE_SUBTRAHEND_STATES=56, PETRI_FLOW=29308, PETRI_PLACES=496, PETRI_TRANSITIONS=1003} [2023-11-29 06:44:22,391 INFO L281 CegarLoopForPetriNet]: 22 programPoint places, 474 predicate places. [2023-11-29 06:44:22,392 INFO L495 AbstractCegarLoop]: Abstraction has has 496 places, 1003 transitions, 29308 flow [2023-11-29 06:44:22,392 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 5.0) internal successors, (120), 24 states have internal predecessors, (120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 06:44:22,392 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 06:44:22,392 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 06:44:22,396 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4bf5264f-ca7e-4100-a5c1-5c220218f14d/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Ended with exit code 0 [2023-11-29 06:44:22,592 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4bf5264f-ca7e-4100-a5c1-5c220218f14d/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable33 [2023-11-29 06:44:22,592 INFO L420 AbstractCegarLoop]: === Iteration 35 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-29 06:44:22,593 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 06:44:22,593 INFO L85 PathProgramCache]: Analyzing trace with hash 1691024681, now seen corresponding path program 4 times [2023-11-29 06:44:22,593 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 06:44:22,593 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [751059250] [2023-11-29 06:44:22,593 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 06:44:22,593 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 06:44:22,609 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 06:44:22,754 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-11-29 06:44:22,755 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 06:44:22,755 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [751059250] [2023-11-29 06:44:22,755 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [751059250] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 06:44:22,755 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1347983519] [2023-11-29 06:44:22,755 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-11-29 06:44:22,755 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 06:44:22,755 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4bf5264f-ca7e-4100-a5c1-5c220218f14d/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 06:44:22,756 INFO L229 MonitoredProcess]: Starting monitored process 29 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4bf5264f-ca7e-4100-a5c1-5c220218f14d/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 06:44:22,758 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4bf5264f-ca7e-4100-a5c1-5c220218f14d/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Waiting until timeout for monitored process [2023-11-29 06:44:22,954 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-11-29 06:44:22,954 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-29 06:44:22,956 INFO L262 TraceCheckSpWp]: Trace formula consists of 191 conjuncts, 52 conjunts are in the unsatisfiable core [2023-11-29 06:44:22,959 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 06:44:23,008 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2023-11-29 06:44:23,503 WARN L214 Elim1Store]: Array PQE input equivalent to false [2023-11-29 06:44:23,504 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 06:44:23,504 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 06:44:28,005 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-11-29 06:44:28,005 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1347983519] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 06:44:28,005 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 06:44:28,006 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 11, 9] total 25 [2023-11-29 06:44:28,006 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1004417820] [2023-11-29 06:44:28,006 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 06:44:28,006 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2023-11-29 06:44:28,006 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 06:44:28,006 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2023-11-29 06:44:28,007 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=98, Invalid=502, Unknown=0, NotChecked=0, Total=600 [2023-11-29 06:44:28,007 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 21 [2023-11-29 06:44:28,007 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 496 places, 1003 transitions, 29308 flow. Second operand has 25 states, 25 states have (on average 4.84) internal successors, (121), 25 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 06:44:28,007 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 06:44:28,007 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 21 [2023-11-29 06:44:28,007 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 06:44:34,431 WARN L293 SmtUtils]: Spent 6.16s on a formula simplification. DAG size of input: 167 DAG size of output: 110 (called from [L 391] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-11-29 06:45:14,392 INFO L124 PetriNetUnfolderBase]: 3120/6166 cut-off events. [2023-11-29 06:45:14,392 INFO L125 PetriNetUnfolderBase]: For 246896/246896 co-relation queries the response was YES. [2023-11-29 06:45:14,437 INFO L83 FinitePrefix]: Finished finitePrefix Result has 69173 conditions, 6166 events. 3120/6166 cut-off events. For 246896/246896 co-relation queries the response was YES. Maximal size of possible extension queue 492. Compared 49206 event pairs, 172 based on Foata normal form. 13/6179 useless extension candidates. Maximal degree in co-relation 68878. Up to 2035 conditions per place. [2023-11-29 06:45:14,469 INFO L140 encePairwiseOnDemand]: 9/21 looper letters, 560 selfloop transitions, 667 changer transitions 11/1239 dead transitions. [2023-11-29 06:45:14,469 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 540 places, 1239 transitions, 34717 flow [2023-11-29 06:45:14,470 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 53 states. [2023-11-29 06:45:14,470 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 53 states. [2023-11-29 06:45:14,471 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 441 transitions. [2023-11-29 06:45:14,471 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.39622641509433965 [2023-11-29 06:45:14,471 INFO L72 ComplementDD]: Start complementDD. Operand 53 states and 441 transitions. [2023-11-29 06:45:14,471 INFO L73 IsDeterministic]: Start isDeterministic. Operand 53 states and 441 transitions. [2023-11-29 06:45:14,471 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 06:45:14,471 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 53 states and 441 transitions. [2023-11-29 06:45:14,472 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 54 states, 53 states have (on average 8.320754716981131) internal successors, (441), 53 states have internal predecessors, (441), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 06:45:14,473 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 54 states, 54 states have (on average 21.0) internal successors, (1134), 54 states have internal predecessors, (1134), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 06:45:14,473 INFO L81 ComplementDD]: Finished complementDD. Result has 54 states, 54 states have (on average 21.0) internal successors, (1134), 54 states have internal predecessors, (1134), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 06:45:14,473 INFO L175 Difference]: Start difference. First operand has 496 places, 1003 transitions, 29308 flow. Second operand 53 states and 441 transitions. [2023-11-29 06:45:14,474 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 540 places, 1239 transitions, 34717 flow [2023-11-29 06:45:16,779 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 509 places, 1239 transitions, 33974 flow, removed 196 selfloop flow, removed 31 redundant places. [2023-11-29 06:45:16,808 INFO L231 Difference]: Finished difference. Result has 521 places, 1063 transitions, 32267 flow [2023-11-29 06:45:16,809 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=21, PETRI_DIFFERENCE_MINUEND_FLOW=28599, PETRI_DIFFERENCE_MINUEND_PLACES=457, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1003, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=611, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=358, PETRI_DIFFERENCE_SUBTRAHEND_STATES=53, PETRI_FLOW=32267, PETRI_PLACES=521, PETRI_TRANSITIONS=1063} [2023-11-29 06:45:16,809 INFO L281 CegarLoopForPetriNet]: 22 programPoint places, 499 predicate places. [2023-11-29 06:45:16,810 INFO L495 AbstractCegarLoop]: Abstraction has has 521 places, 1063 transitions, 32267 flow [2023-11-29 06:45:16,810 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 4.84) internal successors, (121), 25 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 06:45:16,810 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 06:45:16,810 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 06:45:16,815 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4bf5264f-ca7e-4100-a5c1-5c220218f14d/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Ended with exit code 0 [2023-11-29 06:45:17,010 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 29 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4bf5264f-ca7e-4100-a5c1-5c220218f14d/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable34 [2023-11-29 06:45:17,010 INFO L420 AbstractCegarLoop]: === Iteration 36 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-29 06:45:17,011 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 06:45:17,011 INFO L85 PathProgramCache]: Analyzing trace with hash -613255223, now seen corresponding path program 16 times [2023-11-29 06:45:17,011 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 06:45:17,011 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1325299576] [2023-11-29 06:45:17,011 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 06:45:17,011 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 06:45:17,024 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 06:45:17,121 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-11-29 06:45:17,122 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 06:45:17,122 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1325299576] [2023-11-29 06:45:17,122 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1325299576] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 06:45:17,122 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1379824969] [2023-11-29 06:45:17,122 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-11-29 06:45:17,122 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 06:45:17,122 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4bf5264f-ca7e-4100-a5c1-5c220218f14d/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 06:45:17,123 INFO L229 MonitoredProcess]: Starting monitored process 30 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4bf5264f-ca7e-4100-a5c1-5c220218f14d/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 06:45:17,124 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4bf5264f-ca7e-4100-a5c1-5c220218f14d/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Waiting until timeout for monitored process [2023-11-29 06:45:17,325 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-11-29 06:45:17,325 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-29 06:45:17,326 INFO L262 TraceCheckSpWp]: Trace formula consists of 187 conjuncts, 14 conjunts are in the unsatisfiable core [2023-11-29 06:45:17,327 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 06:45:17,412 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-11-29 06:45:17,412 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 06:45:17,651 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 3 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-11-29 06:45:17,651 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1379824969] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 06:45:17,651 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 06:45:17,651 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 8, 7] total 16 [2023-11-29 06:45:17,651 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [627999767] [2023-11-29 06:45:17,652 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 06:45:17,652 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2023-11-29 06:45:17,652 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 06:45:17,652 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2023-11-29 06:45:17,652 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=173, Unknown=0, NotChecked=0, Total=240 [2023-11-29 06:45:17,652 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 21 [2023-11-29 06:45:17,653 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 521 places, 1063 transitions, 32267 flow. Second operand has 16 states, 16 states have (on average 5.0625) internal successors, (81), 16 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 06:45:17,653 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 06:45:17,653 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 21 [2023-11-29 06:45:17,653 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 06:45:22,023 INFO L124 PetriNetUnfolderBase]: 3542/7151 cut-off events. [2023-11-29 06:45:22,023 INFO L125 PetriNetUnfolderBase]: For 297230/297230 co-relation queries the response was YES. [2023-11-29 06:45:22,083 INFO L83 FinitePrefix]: Finished finitePrefix Result has 81494 conditions, 7151 events. 3542/7151 cut-off events. For 297230/297230 co-relation queries the response was YES. Maximal size of possible extension queue 514. Compared 59062 event pairs, 557 based on Foata normal form. 42/7193 useless extension candidates. Maximal degree in co-relation 81189. Up to 2065 conditions per place. [2023-11-29 06:45:22,119 INFO L140 encePairwiseOnDemand]: 15/21 looper letters, 831 selfloop transitions, 381 changer transitions 0/1213 dead transitions. [2023-11-29 06:45:22,119 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 536 places, 1213 transitions, 37745 flow [2023-11-29 06:45:22,119 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2023-11-29 06:45:22,120 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2023-11-29 06:45:22,120 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 173 transitions. [2023-11-29 06:45:22,120 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.484593837535014 [2023-11-29 06:45:22,120 INFO L72 ComplementDD]: Start complementDD. Operand 17 states and 173 transitions. [2023-11-29 06:45:22,120 INFO L73 IsDeterministic]: Start isDeterministic. Operand 17 states and 173 transitions. [2023-11-29 06:45:22,120 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 06:45:22,120 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 17 states and 173 transitions. [2023-11-29 06:45:22,121 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 18 states, 17 states have (on average 10.176470588235293) internal successors, (173), 17 states have internal predecessors, (173), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 06:45:22,121 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 18 states, 18 states have (on average 21.0) internal successors, (378), 18 states have internal predecessors, (378), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 06:45:22,121 INFO L81 ComplementDD]: Finished complementDD. Result has 18 states, 18 states have (on average 21.0) internal successors, (378), 18 states have internal predecessors, (378), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 06:45:22,121 INFO L175 Difference]: Start difference. First operand has 521 places, 1063 transitions, 32267 flow. Second operand 17 states and 173 transitions. [2023-11-29 06:45:22,122 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 536 places, 1213 transitions, 37745 flow [2023-11-29 06:45:25,207 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 505 places, 1213 transitions, 36809 flow, removed 176 selfloop flow, removed 31 redundant places. [2023-11-29 06:45:25,238 INFO L231 Difference]: Finished difference. Result has 507 places, 1083 transitions, 32858 flow [2023-11-29 06:45:25,238 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=21, PETRI_DIFFERENCE_MINUEND_FLOW=30983, PETRI_DIFFERENCE_MINUEND_PLACES=489, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1053, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=351, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=672, PETRI_DIFFERENCE_SUBTRAHEND_STATES=17, PETRI_FLOW=32858, PETRI_PLACES=507, PETRI_TRANSITIONS=1083} [2023-11-29 06:45:25,239 INFO L281 CegarLoopForPetriNet]: 22 programPoint places, 485 predicate places. [2023-11-29 06:45:25,239 INFO L495 AbstractCegarLoop]: Abstraction has has 507 places, 1083 transitions, 32858 flow [2023-11-29 06:45:25,239 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 5.0625) internal successors, (81), 16 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 06:45:25,239 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 06:45:25,239 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 06:45:25,244 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4bf5264f-ca7e-4100-a5c1-5c220218f14d/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Ended with exit code 0 [2023-11-29 06:45:25,439 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 30 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4bf5264f-ca7e-4100-a5c1-5c220218f14d/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable35 [2023-11-29 06:45:25,440 INFO L420 AbstractCegarLoop]: === Iteration 37 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-29 06:45:25,440 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 06:45:25,440 INFO L85 PathProgramCache]: Analyzing trace with hash -1726384943, now seen corresponding path program 17 times [2023-11-29 06:45:25,440 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 06:45:25,440 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [374461513] [2023-11-29 06:45:25,440 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 06:45:25,441 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 06:45:25,456 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 06:45:25,583 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 3 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-11-29 06:45:25,583 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 06:45:25,583 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [374461513] [2023-11-29 06:45:25,583 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [374461513] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 06:45:25,583 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [722869606] [2023-11-29 06:45:25,583 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-11-29 06:45:25,584 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 06:45:25,584 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4bf5264f-ca7e-4100-a5c1-5c220218f14d/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 06:45:25,585 INFO L229 MonitoredProcess]: Starting monitored process 31 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4bf5264f-ca7e-4100-a5c1-5c220218f14d/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 06:45:25,585 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4bf5264f-ca7e-4100-a5c1-5c220218f14d/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Waiting until timeout for monitored process [2023-11-29 06:45:25,748 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-11-29 06:45:25,748 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-29 06:45:25,749 INFO L262 TraceCheckSpWp]: Trace formula consists of 51 conjuncts, 11 conjunts are in the unsatisfiable core [2023-11-29 06:45:25,751 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 06:45:25,873 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-11-29 06:45:25,873 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-29 06:45:25,874 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [722869606] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 06:45:25,874 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-29 06:45:25,874 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [7] total 11 [2023-11-29 06:45:25,874 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1279007605] [2023-11-29 06:45:25,874 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 06:45:25,874 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-11-29 06:45:25,874 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 06:45:25,875 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-11-29 06:45:25,875 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2023-11-29 06:45:25,875 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 21 [2023-11-29 06:45:25,875 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 507 places, 1083 transitions, 32858 flow. Second operand has 6 states, 6 states have (on average 6.0) internal successors, (36), 6 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 06:45:25,875 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 06:45:25,875 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 21 [2023-11-29 06:45:25,875 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 06:45:29,815 INFO L124 PetriNetUnfolderBase]: 3656/7347 cut-off events. [2023-11-29 06:45:29,816 INFO L125 PetriNetUnfolderBase]: For 310134/310134 co-relation queries the response was YES. [2023-11-29 06:45:29,874 INFO L83 FinitePrefix]: Finished finitePrefix Result has 83957 conditions, 7347 events. 3656/7347 cut-off events. For 310134/310134 co-relation queries the response was YES. Maximal size of possible extension queue 548. Compared 60731 event pairs, 750 based on Foata normal form. 26/7373 useless extension candidates. Maximal degree in co-relation 83684. Up to 4670 conditions per place. [2023-11-29 06:45:29,912 INFO L140 encePairwiseOnDemand]: 17/21 looper letters, 935 selfloop transitions, 232 changer transitions 0/1168 dead transitions. [2023-11-29 06:45:29,912 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 512 places, 1168 transitions, 37286 flow [2023-11-29 06:45:29,913 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-11-29 06:45:29,913 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-11-29 06:45:29,913 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 73 transitions. [2023-11-29 06:45:29,913 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5793650793650794 [2023-11-29 06:45:29,913 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 73 transitions. [2023-11-29 06:45:29,913 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 73 transitions. [2023-11-29 06:45:29,913 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 06:45:29,913 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 73 transitions. [2023-11-29 06:45:29,914 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 12.166666666666666) internal successors, (73), 6 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 06:45:29,914 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 21.0) internal successors, (147), 7 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 06:45:29,914 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 21.0) internal successors, (147), 7 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 06:45:29,914 INFO L175 Difference]: Start difference. First operand has 507 places, 1083 transitions, 32858 flow. Second operand 6 states and 73 transitions. [2023-11-29 06:45:29,914 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 512 places, 1168 transitions, 37286 flow [2023-11-29 06:45:33,109 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 498 places, 1168 transitions, 36737 flow, removed 48 selfloop flow, removed 14 redundant places. [2023-11-29 06:45:33,138 INFO L231 Difference]: Finished difference. Result has 500 places, 1116 transitions, 34107 flow [2023-11-29 06:45:33,139 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=21, PETRI_DIFFERENCE_MINUEND_FLOW=32315, PETRI_DIFFERENCE_MINUEND_PLACES=493, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1083, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=199, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=862, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=34107, PETRI_PLACES=500, PETRI_TRANSITIONS=1116} [2023-11-29 06:45:33,139 INFO L281 CegarLoopForPetriNet]: 22 programPoint places, 478 predicate places. [2023-11-29 06:45:33,139 INFO L495 AbstractCegarLoop]: Abstraction has has 500 places, 1116 transitions, 34107 flow [2023-11-29 06:45:33,140 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 6.0) internal successors, (36), 6 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 06:45:33,140 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 06:45:33,140 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 06:45:33,144 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4bf5264f-ca7e-4100-a5c1-5c220218f14d/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Ended with exit code 0 [2023-11-29 06:45:33,340 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 31 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4bf5264f-ca7e-4100-a5c1-5c220218f14d/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable36 [2023-11-29 06:45:33,340 INFO L420 AbstractCegarLoop]: === Iteration 38 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-29 06:45:33,341 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 06:45:33,341 INFO L85 PathProgramCache]: Analyzing trace with hash 1776004042, now seen corresponding path program 5 times [2023-11-29 06:45:33,341 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 06:45:33,341 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1315615095] [2023-11-29 06:45:33,341 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 06:45:33,341 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 06:45:33,358 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 06:45:33,564 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-11-29 06:45:33,565 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 06:45:33,565 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1315615095] [2023-11-29 06:45:33,565 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1315615095] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 06:45:33,565 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1812667556] [2023-11-29 06:45:33,565 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-11-29 06:45:33,565 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 06:45:33,565 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4bf5264f-ca7e-4100-a5c1-5c220218f14d/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 06:45:33,566 INFO L229 MonitoredProcess]: Starting monitored process 32 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4bf5264f-ca7e-4100-a5c1-5c220218f14d/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 06:45:33,569 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4bf5264f-ca7e-4100-a5c1-5c220218f14d/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Waiting until timeout for monitored process [2023-11-29 06:45:33,845 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-11-29 06:45:33,845 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-29 06:45:33,846 INFO L262 TraceCheckSpWp]: Trace formula consists of 189 conjuncts, 14 conjunts are in the unsatisfiable core [2023-11-29 06:45:33,847 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 06:45:33,925 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-11-29 06:45:33,925 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 06:45:34,154 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-11-29 06:45:34,154 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1812667556] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 06:45:34,154 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 06:45:34,154 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7, 8] total 15 [2023-11-29 06:45:34,155 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1942425926] [2023-11-29 06:45:34,155 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 06:45:34,155 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2023-11-29 06:45:34,155 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 06:45:34,155 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2023-11-29 06:45:34,156 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=160, Unknown=0, NotChecked=0, Total=210 [2023-11-29 06:45:34,156 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 21 [2023-11-29 06:45:34,156 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 500 places, 1116 transitions, 34107 flow. Second operand has 15 states, 15 states have (on average 5.133333333333334) internal successors, (77), 15 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 06:45:34,156 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 06:45:34,156 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 21 [2023-11-29 06:45:34,156 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 06:45:39,759 INFO L124 PetriNetUnfolderBase]: 3812/7678 cut-off events. [2023-11-29 06:45:39,759 INFO L125 PetriNetUnfolderBase]: For 330562/330562 co-relation queries the response was YES. [2023-11-29 06:45:39,822 INFO L83 FinitePrefix]: Finished finitePrefix Result has 87519 conditions, 7678 events. 3812/7678 cut-off events. For 330562/330562 co-relation queries the response was YES. Maximal size of possible extension queue 560. Compared 64291 event pairs, 640 based on Foata normal form. 38/7716 useless extension candidates. Maximal degree in co-relation 87244. Up to 3084 conditions per place. [2023-11-29 06:45:39,861 INFO L140 encePairwiseOnDemand]: 15/21 looper letters, 784 selfloop transitions, 518 changer transitions 0/1303 dead transitions. [2023-11-29 06:45:39,862 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 530 places, 1303 transitions, 39390 flow [2023-11-29 06:45:39,862 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2023-11-29 06:45:39,862 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 31 states. [2023-11-29 06:45:39,863 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 298 transitions. [2023-11-29 06:45:39,863 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4577572964669739 [2023-11-29 06:45:39,863 INFO L72 ComplementDD]: Start complementDD. Operand 31 states and 298 transitions. [2023-11-29 06:45:39,863 INFO L73 IsDeterministic]: Start isDeterministic. Operand 31 states and 298 transitions. [2023-11-29 06:45:39,863 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 06:45:39,863 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 31 states and 298 transitions. [2023-11-29 06:45:39,864 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 32 states, 31 states have (on average 9.612903225806452) internal successors, (298), 31 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 06:45:39,864 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 32 states, 32 states have (on average 21.0) internal successors, (672), 32 states have internal predecessors, (672), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 06:45:39,865 INFO L81 ComplementDD]: Finished complementDD. Result has 32 states, 32 states have (on average 21.0) internal successors, (672), 32 states have internal predecessors, (672), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 06:45:39,865 INFO L175 Difference]: Start difference. First operand has 500 places, 1116 transitions, 34107 flow. Second operand 31 states and 298 transitions. [2023-11-29 06:45:39,865 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 530 places, 1303 transitions, 39390 flow [2023-11-29 06:45:43,532 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 526 places, 1303 transitions, 38855 flow, removed 33 selfloop flow, removed 4 redundant places. [2023-11-29 06:45:43,571 INFO L231 Difference]: Finished difference. Result has 536 places, 1152 transitions, 36037 flow [2023-11-29 06:45:43,572 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=21, PETRI_DIFFERENCE_MINUEND_FLOW=33326, PETRI_DIFFERENCE_MINUEND_PLACES=496, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1109, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=477, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=611, PETRI_DIFFERENCE_SUBTRAHEND_STATES=31, PETRI_FLOW=36037, PETRI_PLACES=536, PETRI_TRANSITIONS=1152} [2023-11-29 06:45:43,572 INFO L281 CegarLoopForPetriNet]: 22 programPoint places, 514 predicate places. [2023-11-29 06:45:43,572 INFO L495 AbstractCegarLoop]: Abstraction has has 536 places, 1152 transitions, 36037 flow [2023-11-29 06:45:43,573 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 5.133333333333334) internal successors, (77), 15 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 06:45:43,573 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 06:45:43,573 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 06:45:43,577 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4bf5264f-ca7e-4100-a5c1-5c220218f14d/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Ended with exit code 0 [2023-11-29 06:45:43,773 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 32 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4bf5264f-ca7e-4100-a5c1-5c220218f14d/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable37 [2023-11-29 06:45:43,773 INFO L420 AbstractCegarLoop]: === Iteration 39 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-29 06:45:43,774 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 06:45:43,774 INFO L85 PathProgramCache]: Analyzing trace with hash 1510274769, now seen corresponding path program 6 times [2023-11-29 06:45:43,774 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 06:45:43,774 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2062496387] [2023-11-29 06:45:43,774 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 06:45:43,774 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 06:45:43,796 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 06:45:44,007 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-11-29 06:45:44,008 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 06:45:44,008 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2062496387] [2023-11-29 06:45:44,008 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2062496387] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 06:45:44,008 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2105523709] [2023-11-29 06:45:44,008 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-11-29 06:45:44,008 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 06:45:44,008 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4bf5264f-ca7e-4100-a5c1-5c220218f14d/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 06:45:44,009 INFO L229 MonitoredProcess]: Starting monitored process 33 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4bf5264f-ca7e-4100-a5c1-5c220218f14d/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 06:45:44,010 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4bf5264f-ca7e-4100-a5c1-5c220218f14d/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Waiting until timeout for monitored process [2023-11-29 06:45:44,195 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2023-11-29 06:45:44,195 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-29 06:45:44,197 INFO L262 TraceCheckSpWp]: Trace formula consists of 191 conjuncts, 54 conjunts are in the unsatisfiable core [2023-11-29 06:45:44,200 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 06:45:44,261 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2023-11-29 06:45:44,806 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 06:45:44,807 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 06:45:49,653 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-11-29 06:45:49,654 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2105523709] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 06:45:49,654 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 06:45:49,654 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 11, 9] total 25 [2023-11-29 06:45:49,654 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1458923819] [2023-11-29 06:45:49,654 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 06:45:49,654 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2023-11-29 06:45:49,655 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 06:45:49,655 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2023-11-29 06:45:49,655 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=112, Invalid=488, Unknown=0, NotChecked=0, Total=600 [2023-11-29 06:45:49,656 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 21 [2023-11-29 06:45:49,656 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 536 places, 1152 transitions, 36037 flow. Second operand has 25 states, 25 states have (on average 4.84) internal successors, (121), 25 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 06:45:49,656 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 06:45:49,656 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 21 [2023-11-29 06:45:49,656 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 06:46:09,389 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.09s for a HTC check with result VALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-11-29 06:46:13,020 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.84s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-11-29 06:46:20,918 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.70s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-11-29 06:46:43,980 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.91s for a HTC check with result VALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-11-29 06:46:48,176 INFO L124 PetriNetUnfolderBase]: 3851/7788 cut-off events. [2023-11-29 06:46:48,176 INFO L125 PetriNetUnfolderBase]: For 344926/344926 co-relation queries the response was YES. [2023-11-29 06:46:48,240 INFO L83 FinitePrefix]: Finished finitePrefix Result has 90510 conditions, 7788 events. 3851/7788 cut-off events. For 344926/344926 co-relation queries the response was YES. Maximal size of possible extension queue 576. Compared 65626 event pairs, 314 based on Foata normal form. 14/7802 useless extension candidates. Maximal degree in co-relation 90180. Up to 3001 conditions per place. [2023-11-29 06:46:48,280 INFO L140 encePairwiseOnDemand]: 9/21 looper letters, 716 selfloop transitions, 621 changer transitions 14/1352 dead transitions. [2023-11-29 06:46:48,281 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 591 places, 1352 transitions, 39975 flow [2023-11-29 06:46:48,281 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 56 states. [2023-11-29 06:46:48,281 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 56 states. [2023-11-29 06:46:48,282 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 483 transitions. [2023-11-29 06:46:48,282 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4107142857142857 [2023-11-29 06:46:48,282 INFO L72 ComplementDD]: Start complementDD. Operand 56 states and 483 transitions. [2023-11-29 06:46:48,282 INFO L73 IsDeterministic]: Start isDeterministic. Operand 56 states and 483 transitions. [2023-11-29 06:46:48,283 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 06:46:48,283 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 56 states and 483 transitions. [2023-11-29 06:46:48,284 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 57 states, 56 states have (on average 8.625) internal successors, (483), 56 states have internal predecessors, (483), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 06:46:48,285 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 57 states, 57 states have (on average 21.0) internal successors, (1197), 57 states have internal predecessors, (1197), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 06:46:48,285 INFO L81 ComplementDD]: Finished complementDD. Result has 57 states, 57 states have (on average 21.0) internal successors, (1197), 57 states have internal predecessors, (1197), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 06:46:48,285 INFO L175 Difference]: Start difference. First operand has 536 places, 1152 transitions, 36037 flow. Second operand 56 states and 483 transitions. [2023-11-29 06:46:48,285 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 591 places, 1352 transitions, 39975 flow [2023-11-29 06:46:51,924 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 581 places, 1352 transitions, 39296 flow, removed 154 selfloop flow, removed 10 redundant places. [2023-11-29 06:46:51,958 INFO L231 Difference]: Finished difference. Result has 591 places, 1161 transitions, 37262 flow [2023-11-29 06:46:51,959 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=21, PETRI_DIFFERENCE_MINUEND_FLOW=35310, PETRI_DIFFERENCE_MINUEND_PLACES=526, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1150, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=609, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=534, PETRI_DIFFERENCE_SUBTRAHEND_STATES=56, PETRI_FLOW=37262, PETRI_PLACES=591, PETRI_TRANSITIONS=1161} [2023-11-29 06:46:51,959 INFO L281 CegarLoopForPetriNet]: 22 programPoint places, 569 predicate places. [2023-11-29 06:46:51,959 INFO L495 AbstractCegarLoop]: Abstraction has has 591 places, 1161 transitions, 37262 flow [2023-11-29 06:46:51,959 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 4.84) internal successors, (121), 25 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 06:46:51,959 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 06:46:51,959 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 06:46:51,964 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4bf5264f-ca7e-4100-a5c1-5c220218f14d/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Ended with exit code 0 [2023-11-29 06:46:52,160 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 33 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4bf5264f-ca7e-4100-a5c1-5c220218f14d/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable38 [2023-11-29 06:46:52,160 INFO L420 AbstractCegarLoop]: === Iteration 40 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-29 06:46:52,160 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 06:46:52,160 INFO L85 PathProgramCache]: Analyzing trace with hash -947960847, now seen corresponding path program 18 times [2023-11-29 06:46:52,160 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 06:46:52,160 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [919021673] [2023-11-29 06:46:52,160 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 06:46:52,161 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 06:46:52,177 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 06:46:52,290 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-11-29 06:46:52,290 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 06:46:52,291 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [919021673] [2023-11-29 06:46:52,291 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [919021673] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 06:46:52,291 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2038481592] [2023-11-29 06:46:52,291 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-11-29 06:46:52,291 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 06:46:52,291 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4bf5264f-ca7e-4100-a5c1-5c220218f14d/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 06:46:52,292 INFO L229 MonitoredProcess]: Starting monitored process 34 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4bf5264f-ca7e-4100-a5c1-5c220218f14d/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 06:46:52,293 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4bf5264f-ca7e-4100-a5c1-5c220218f14d/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Waiting until timeout for monitored process [2023-11-29 06:46:52,478 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2023-11-29 06:46:52,478 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-29 06:46:52,479 INFO L262 TraceCheckSpWp]: Trace formula consists of 187 conjuncts, 14 conjunts are in the unsatisfiable core [2023-11-29 06:46:52,480 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 06:46:52,562 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-11-29 06:46:52,562 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 06:46:52,823 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-11-29 06:46:52,823 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2038481592] provided 1 perfect and 1 imperfect interpolant sequences [2023-11-29 06:46:52,823 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2023-11-29 06:46:52,824 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [7, 7] total 15 [2023-11-29 06:46:52,824 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [777839245] [2023-11-29 06:46:52,824 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 06:46:52,824 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-11-29 06:46:52,824 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 06:46:52,824 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-11-29 06:46:52,825 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=150, Unknown=0, NotChecked=0, Total=210 [2023-11-29 06:46:52,825 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 21 [2023-11-29 06:46:52,825 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 591 places, 1161 transitions, 37262 flow. Second operand has 6 states, 6 states have (on average 6.0) internal successors, (36), 6 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 06:46:52,825 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 06:46:52,825 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 21 [2023-11-29 06:46:52,825 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 06:46:56,993 INFO L124 PetriNetUnfolderBase]: 3882/7885 cut-off events. [2023-11-29 06:46:56,993 INFO L125 PetriNetUnfolderBase]: For 377070/377070 co-relation queries the response was YES. [2023-11-29 06:46:57,073 INFO L83 FinitePrefix]: Finished finitePrefix Result has 94718 conditions, 7885 events. 3882/7885 cut-off events. For 377070/377070 co-relation queries the response was YES. Maximal size of possible extension queue 590. Compared 66674 event pairs, 275 based on Foata normal form. 26/7911 useless extension candidates. Maximal degree in co-relation 94415. Up to 4847 conditions per place. [2023-11-29 06:46:57,260 INFO L140 encePairwiseOnDemand]: 14/21 looper letters, 771 selfloop transitions, 456 changer transitions 0/1228 dead transitions. [2023-11-29 06:46:57,260 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 594 places, 1228 transitions, 41240 flow [2023-11-29 06:46:57,260 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-11-29 06:46:57,260 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-11-29 06:46:57,261 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 72 transitions. [2023-11-29 06:46:57,261 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5714285714285714 [2023-11-29 06:46:57,261 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 72 transitions. [2023-11-29 06:46:57,261 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 72 transitions. [2023-11-29 06:46:57,261 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 06:46:57,261 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 72 transitions. [2023-11-29 06:46:57,261 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 12.0) internal successors, (72), 6 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 06:46:57,262 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 21.0) internal successors, (147), 7 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 06:46:57,262 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 21.0) internal successors, (147), 7 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 06:46:57,262 INFO L175 Difference]: Start difference. First operand has 591 places, 1161 transitions, 37262 flow. Second operand 6 states and 72 transitions. [2023-11-29 06:46:57,262 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 594 places, 1228 transitions, 41240 flow [2023-11-29 06:47:01,770 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 563 places, 1228 transitions, 40758 flow, removed 90 selfloop flow, removed 31 redundant places. [2023-11-29 06:47:01,803 INFO L231 Difference]: Finished difference. Result has 567 places, 1193 transitions, 39569 flow [2023-11-29 06:47:01,804 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=21, PETRI_DIFFERENCE_MINUEND_FLOW=36288, PETRI_DIFFERENCE_MINUEND_PLACES=558, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1150, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=413, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=716, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=39569, PETRI_PLACES=567, PETRI_TRANSITIONS=1193} [2023-11-29 06:47:01,804 INFO L281 CegarLoopForPetriNet]: 22 programPoint places, 545 predicate places. [2023-11-29 06:47:01,804 INFO L495 AbstractCegarLoop]: Abstraction has has 567 places, 1193 transitions, 39569 flow [2023-11-29 06:47:01,804 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 6.0) internal successors, (36), 6 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 06:47:01,804 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 06:47:01,804 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 06:47:01,809 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4bf5264f-ca7e-4100-a5c1-5c220218f14d/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Ended with exit code 0 [2023-11-29 06:47:02,005 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 34 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4bf5264f-ca7e-4100-a5c1-5c220218f14d/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable39 [2023-11-29 06:47:02,005 INFO L420 AbstractCegarLoop]: === Iteration 41 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-29 06:47:02,005 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 06:47:02,005 INFO L85 PathProgramCache]: Analyzing trace with hash -1420701385, now seen corresponding path program 7 times [2023-11-29 06:47:02,005 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 06:47:02,006 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1195519022] [2023-11-29 06:47:02,006 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 06:47:02,006 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 06:47:02,021 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 06:47:02,278 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-11-29 06:47:02,278 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 06:47:02,279 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1195519022] [2023-11-29 06:47:02,279 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1195519022] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 06:47:02,279 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1421394465] [2023-11-29 06:47:02,279 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-11-29 06:47:02,279 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 06:47:02,279 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4bf5264f-ca7e-4100-a5c1-5c220218f14d/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 06:47:02,280 INFO L229 MonitoredProcess]: Starting monitored process 35 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4bf5264f-ca7e-4100-a5c1-5c220218f14d/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 06:47:02,281 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4bf5264f-ca7e-4100-a5c1-5c220218f14d/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Waiting until timeout for monitored process [2023-11-29 06:47:02,486 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 06:47:02,488 INFO L262 TraceCheckSpWp]: Trace formula consists of 191 conjuncts, 16 conjunts are in the unsatisfiable core [2023-11-29 06:47:02,489 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 06:47:02,603 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-11-29 06:47:02,604 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 06:47:02,910 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-11-29 06:47:02,910 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1421394465] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 06:47:02,910 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 06:47:02,910 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 19 [2023-11-29 06:47:02,910 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [980555557] [2023-11-29 06:47:02,911 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 06:47:02,911 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2023-11-29 06:47:02,911 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 06:47:02,911 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2023-11-29 06:47:02,912 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=257, Unknown=0, NotChecked=0, Total=342 [2023-11-29 06:47:02,912 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 21 [2023-11-29 06:47:02,912 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 567 places, 1193 transitions, 39569 flow. Second operand has 19 states, 19 states have (on average 4.947368421052632) internal successors, (94), 19 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 06:47:02,912 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 06:47:02,912 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 21 [2023-11-29 06:47:02,912 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 06:47:11,071 INFO L124 PetriNetUnfolderBase]: 3928/7951 cut-off events. [2023-11-29 06:47:11,071 INFO L125 PetriNetUnfolderBase]: For 423644/423644 co-relation queries the response was YES. [2023-11-29 06:47:11,143 INFO L83 FinitePrefix]: Finished finitePrefix Result has 98335 conditions, 7951 events. 3928/7951 cut-off events. For 423644/423644 co-relation queries the response was YES. Maximal size of possible extension queue 595. Compared 67328 event pairs, 504 based on Foata normal form. 28/7979 useless extension candidates. Maximal degree in co-relation 98027. Up to 2077 conditions per place. [2023-11-29 06:47:11,186 INFO L140 encePairwiseOnDemand]: 14/21 looper letters, 763 selfloop transitions, 638 changer transitions 3/1405 dead transitions. [2023-11-29 06:47:11,186 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 604 places, 1405 transitions, 46007 flow [2023-11-29 06:47:11,186 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2023-11-29 06:47:11,187 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 38 states. [2023-11-29 06:47:11,187 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 351 transitions. [2023-11-29 06:47:11,187 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4398496240601504 [2023-11-29 06:47:11,187 INFO L72 ComplementDD]: Start complementDD. Operand 38 states and 351 transitions. [2023-11-29 06:47:11,187 INFO L73 IsDeterministic]: Start isDeterministic. Operand 38 states and 351 transitions. [2023-11-29 06:47:11,188 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 06:47:11,188 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 38 states and 351 transitions. [2023-11-29 06:47:11,188 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 39 states, 38 states have (on average 9.236842105263158) internal successors, (351), 38 states have internal predecessors, (351), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 06:47:11,189 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 39 states, 39 states have (on average 21.0) internal successors, (819), 39 states have internal predecessors, (819), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 06:47:11,189 INFO L81 ComplementDD]: Finished complementDD. Result has 39 states, 39 states have (on average 21.0) internal successors, (819), 39 states have internal predecessors, (819), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 06:47:11,189 INFO L175 Difference]: Start difference. First operand has 567 places, 1193 transitions, 39569 flow. Second operand 38 states and 351 transitions. [2023-11-29 06:47:11,189 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 604 places, 1405 transitions, 46007 flow [2023-11-29 06:47:15,816 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 603 places, 1405 transitions, 45912 flow, removed 24 selfloop flow, removed 1 redundant places. [2023-11-29 06:47:15,853 INFO L231 Difference]: Finished difference. Result has 611 places, 1237 transitions, 42640 flow [2023-11-29 06:47:15,854 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=21, PETRI_DIFFERENCE_MINUEND_FLOW=39399, PETRI_DIFFERENCE_MINUEND_PLACES=566, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1190, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=591, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=587, PETRI_DIFFERENCE_SUBTRAHEND_STATES=38, PETRI_FLOW=42640, PETRI_PLACES=611, PETRI_TRANSITIONS=1237} [2023-11-29 06:47:15,854 INFO L281 CegarLoopForPetriNet]: 22 programPoint places, 589 predicate places. [2023-11-29 06:47:15,855 INFO L495 AbstractCegarLoop]: Abstraction has has 611 places, 1237 transitions, 42640 flow [2023-11-29 06:47:15,855 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 4.947368421052632) internal successors, (94), 19 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 06:47:15,855 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 06:47:15,855 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 06:47:15,859 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4bf5264f-ca7e-4100-a5c1-5c220218f14d/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Ended with exit code 0 [2023-11-29 06:47:16,055 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 35 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4bf5264f-ca7e-4100-a5c1-5c220218f14d/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable40 [2023-11-29 06:47:16,055 INFO L420 AbstractCegarLoop]: === Iteration 42 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-29 06:47:16,056 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 06:47:16,056 INFO L85 PathProgramCache]: Analyzing trace with hash 2086444586, now seen corresponding path program 8 times [2023-11-29 06:47:16,056 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 06:47:16,056 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [982332129] [2023-11-29 06:47:16,056 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 06:47:16,056 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 06:47:16,072 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 06:47:16,336 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-11-29 06:47:16,336 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 06:47:16,336 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [982332129] [2023-11-29 06:47:16,337 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [982332129] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 06:47:16,337 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [528110650] [2023-11-29 06:47:16,337 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-29 06:47:16,337 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 06:47:16,337 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4bf5264f-ca7e-4100-a5c1-5c220218f14d/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 06:47:16,338 INFO L229 MonitoredProcess]: Starting monitored process 36 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4bf5264f-ca7e-4100-a5c1-5c220218f14d/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 06:47:16,339 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4bf5264f-ca7e-4100-a5c1-5c220218f14d/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (36)] Waiting until timeout for monitored process [2023-11-29 06:47:16,532 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-11-29 06:47:16,532 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-29 06:47:16,534 INFO L262 TraceCheckSpWp]: Trace formula consists of 189 conjuncts, 51 conjunts are in the unsatisfiable core [2023-11-29 06:47:16,537 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 06:47:16,594 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2023-11-29 06:47:16,944 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 06:47:16,944 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 06:47:22,260 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-11-29 06:47:22,261 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [528110650] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 06:47:22,261 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 06:47:22,261 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 10, 9] total 24 [2023-11-29 06:47:22,261 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1704937269] [2023-11-29 06:47:22,261 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 06:47:22,261 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2023-11-29 06:47:22,261 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 06:47:22,262 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2023-11-29 06:47:22,262 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=459, Unknown=0, NotChecked=0, Total=552 [2023-11-29 06:47:22,262 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 21 [2023-11-29 06:47:22,262 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 611 places, 1237 transitions, 42640 flow. Second operand has 24 states, 24 states have (on average 4.833333333333333) internal successors, (116), 24 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 06:47:22,262 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 06:47:22,262 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 21 [2023-11-29 06:47:22,263 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 06:47:39,903 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.30s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-11-29 06:47:41,862 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.10s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-11-29 06:47:48,883 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.14s for a HTC check with result VALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-11-29 06:47:50,792 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.91s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-11-29 06:48:18,096 WARN L293 SmtUtils]: Spent 5.17s on a formula simplification that was a NOOP. DAG size: 160 (called from [L 391] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-11-29 06:48:37,124 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-11-29 06:48:43,280 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-11-29 06:48:47,356 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.07s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-11-29 06:48:51,362 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-11-29 06:49:00,734 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.30s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-11-29 06:49:03,457 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.08s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-11-29 06:49:09,359 INFO L124 PetriNetUnfolderBase]: 4192/8509 cut-off events. [2023-11-29 06:49:09,359 INFO L125 PetriNetUnfolderBase]: For 481867/481867 co-relation queries the response was YES. [2023-11-29 06:49:09,440 INFO L83 FinitePrefix]: Finished finitePrefix Result has 108959 conditions, 8509 events. 4192/8509 cut-off events. For 481867/481867 co-relation queries the response was YES. Maximal size of possible extension queue 654. Compared 73320 event pairs, 275 based on Foata normal form. 22/8531 useless extension candidates. Maximal degree in co-relation 108619. Up to 3330 conditions per place. [2023-11-29 06:49:09,488 INFO L140 encePairwiseOnDemand]: 9/21 looper letters, 787 selfloop transitions, 765 changer transitions 31/1584 dead transitions. [2023-11-29 06:49:09,489 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 682 places, 1584 transitions, 51760 flow [2023-11-29 06:49:09,490 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 73 states. [2023-11-29 06:49:09,490 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 73 states. [2023-11-29 06:49:09,490 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 73 states to 73 states and 628 transitions. [2023-11-29 06:49:09,491 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4096542726679713 [2023-11-29 06:49:09,491 INFO L72 ComplementDD]: Start complementDD. Operand 73 states and 628 transitions. [2023-11-29 06:49:09,491 INFO L73 IsDeterministic]: Start isDeterministic. Operand 73 states and 628 transitions. [2023-11-29 06:49:09,491 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 06:49:09,491 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 73 states and 628 transitions. [2023-11-29 06:49:09,492 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 74 states, 73 states have (on average 8.602739726027398) internal successors, (628), 73 states have internal predecessors, (628), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 06:49:09,494 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 74 states, 74 states have (on average 21.0) internal successors, (1554), 74 states have internal predecessors, (1554), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 06:49:09,494 INFO L81 ComplementDD]: Finished complementDD. Result has 74 states, 74 states have (on average 21.0) internal successors, (1554), 74 states have internal predecessors, (1554), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 06:49:09,494 INFO L175 Difference]: Start difference. First operand has 611 places, 1237 transitions, 42640 flow. Second operand 73 states and 628 transitions. [2023-11-29 06:49:09,494 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 682 places, 1584 transitions, 51760 flow [2023-11-29 06:49:15,094 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 664 places, 1584 transitions, 50862 flow, removed 257 selfloop flow, removed 18 redundant places. [2023-11-29 06:49:15,135 INFO L231 Difference]: Finished difference. Result has 677 places, 1343 transitions, 47829 flow [2023-11-29 06:49:15,136 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=21, PETRI_DIFFERENCE_MINUEND_FLOW=41746, PETRI_DIFFERENCE_MINUEND_PLACES=592, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1234, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=659, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=534, PETRI_DIFFERENCE_SUBTRAHEND_STATES=73, PETRI_FLOW=47829, PETRI_PLACES=677, PETRI_TRANSITIONS=1343} [2023-11-29 06:49:15,136 INFO L281 CegarLoopForPetriNet]: 22 programPoint places, 655 predicate places. [2023-11-29 06:49:15,136 INFO L495 AbstractCegarLoop]: Abstraction has has 677 places, 1343 transitions, 47829 flow [2023-11-29 06:49:15,136 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 4.833333333333333) internal successors, (116), 24 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 06:49:15,136 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 06:49:15,137 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 06:49:15,141 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4bf5264f-ca7e-4100-a5c1-5c220218f14d/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (36)] Ended with exit code 0 [2023-11-29 06:49:15,337 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 36 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4bf5264f-ca7e-4100-a5c1-5c220218f14d/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable41 [2023-11-29 06:49:15,337 INFO L420 AbstractCegarLoop]: === Iteration 43 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-29 06:49:15,337 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 06:49:15,337 INFO L85 PathProgramCache]: Analyzing trace with hash -1690600939, now seen corresponding path program 9 times [2023-11-29 06:49:15,337 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 06:49:15,338 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2081695380] [2023-11-29 06:49:15,338 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 06:49:15,338 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 06:49:15,354 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 06:49:15,503 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-11-29 06:49:15,503 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 06:49:15,503 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2081695380] [2023-11-29 06:49:15,503 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2081695380] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 06:49:15,503 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2085365397] [2023-11-29 06:49:15,503 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-11-29 06:49:15,504 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 06:49:15,504 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4bf5264f-ca7e-4100-a5c1-5c220218f14d/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 06:49:15,504 INFO L229 MonitoredProcess]: Starting monitored process 37 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4bf5264f-ca7e-4100-a5c1-5c220218f14d/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 06:49:15,505 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4bf5264f-ca7e-4100-a5c1-5c220218f14d/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (37)] Waiting until timeout for monitored process [2023-11-29 06:49:15,722 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2023-11-29 06:49:15,722 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-29 06:49:15,724 INFO L262 TraceCheckSpWp]: Trace formula consists of 191 conjuncts, 52 conjunts are in the unsatisfiable core [2023-11-29 06:49:15,726 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 06:49:15,775 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2023-11-29 06:49:16,289 WARN L214 Elim1Store]: Array PQE input equivalent to false [2023-11-29 06:49:16,289 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 06:49:16,290 INFO L327 TraceCheckSpWp]: Computing backward predicates...