./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 826ab2ba Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44d2f74b-8f25-498a-b792-4268e6d41a37/bin/uautomizer-verify-qhAvR1uOyd/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44d2f74b-8f25-498a-b792-4268e6d41a37/bin/uautomizer-verify-qhAvR1uOyd/plugins/org.eclipse.equinox.launcher_1.6.800.v20240513-1750.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44d2f74b-8f25-498a-b792-4268e6d41a37/bin/uautomizer-verify-qhAvR1uOyd/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44d2f74b-8f25-498a-b792-4268e6d41a37/bin/uautomizer-verify-qhAvR1uOyd/config/AutomizerReach.xml -i ../../sv-benchmarks/c/weaver/unroll-cond-3.wvr.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44d2f74b-8f25-498a-b792-4268e6d41a37/bin/uautomizer-verify-qhAvR1uOyd/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44d2f74b-8f25-498a-b792-4268e6d41a37/bin/uautomizer-verify-qhAvR1uOyd --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 0.3.0-dev-826ab2b [2024-11-13 14:34:33,881 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-11-13 14:34:33,978 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44d2f74b-8f25-498a-b792-4268e6d41a37/bin/uautomizer-verify-qhAvR1uOyd/config/svcomp-Reach-32bit-Automizer_Default.epf [2024-11-13 14:34:33,984 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-11-13 14:34:33,985 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-11-13 14:34:34,010 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-11-13 14:34:34,011 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-11-13 14:34:34,012 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-11-13 14:34:34,012 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-11-13 14:34:34,012 INFO L153 SettingsManager]: * Use memory slicer=true [2024-11-13 14:34:34,012 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-11-13 14:34:34,013 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-11-13 14:34:34,013 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-11-13 14:34:34,013 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-11-13 14:34:34,013 INFO L153 SettingsManager]: * Use SBE=true [2024-11-13 14:34:34,014 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-11-13 14:34:34,014 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-11-13 14:34:34,014 INFO L153 SettingsManager]: * sizeof long=4 [2024-11-13 14:34:34,014 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-11-13 14:34:34,014 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-11-13 14:34:34,018 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-11-13 14:34:34,018 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-11-13 14:34:34,018 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-11-13 14:34:34,018 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-11-13 14:34:34,018 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-11-13 14:34:34,018 INFO L153 SettingsManager]: * sizeof long double=12 [2024-11-13 14:34:34,018 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-11-13 14:34:34,018 INFO L153 SettingsManager]: * Use constant arrays=true [2024-11-13 14:34:34,018 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-11-13 14:34:34,019 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-11-13 14:34:34,019 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-11-13 14:34:34,019 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-11-13 14:34:34,019 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-11-13 14:34:34,019 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-11-13 14:34:34,019 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-11-13 14:34:34,019 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-11-13 14:34:34,019 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-11-13 14:34:34,019 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-11-13 14:34:34,020 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-11-13 14:34:34,020 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-11-13 14:34:34,020 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-11-13 14:34:34,020 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-11-13 14:34:34,020 INFO L153 SettingsManager]: * Looper check in Petri net analysis=SEMANTIC 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_44d2f74b-8f25-498a-b792-4268e6d41a37/bin/uautomizer-verify-qhAvR1uOyd 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 [2024-11-13 14:34:34,333 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-11-13 14:34:34,346 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-11-13 14:34:34,348 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-11-13 14:34:34,350 INFO L270 PluginConnector]: Initializing CDTParser... [2024-11-13 14:34:34,350 INFO L274 PluginConnector]: CDTParser initialized [2024-11-13 14:34:34,353 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44d2f74b-8f25-498a-b792-4268e6d41a37/bin/uautomizer-verify-qhAvR1uOyd/../../sv-benchmarks/c/weaver/unroll-cond-3.wvr.c Unable to find full path for "g++" [2024-11-13 14:34:36,623 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-11-13 14:34:36,928 INFO L384 CDTParser]: Found 1 translation units. [2024-11-13 14:34:36,929 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44d2f74b-8f25-498a-b792-4268e6d41a37/sv-benchmarks/c/weaver/unroll-cond-3.wvr.c [2024-11-13 14:34:36,937 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44d2f74b-8f25-498a-b792-4268e6d41a37/bin/uautomizer-verify-qhAvR1uOyd/data/4efd1becf/61f7a6010a5140bfa765479e688f4fd7/FLAG0f0f14e48 [2024-11-13 14:34:36,953 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44d2f74b-8f25-498a-b792-4268e6d41a37/bin/uautomizer-verify-qhAvR1uOyd/data/4efd1becf/61f7a6010a5140bfa765479e688f4fd7 [2024-11-13 14:34:36,956 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-11-13 14:34:36,958 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2024-11-13 14:34:36,959 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-11-13 14:34:36,959 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-11-13 14:34:36,966 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-11-13 14:34:36,967 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.11 02:34:36" (1/1) ... [2024-11-13 14:34:36,970 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@73df992a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 02:34:36, skipping insertion in model container [2024-11-13 14:34:36,971 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.11 02:34:36" (1/1) ... [2024-11-13 14:34:36,993 INFO L175 MainTranslator]: Built tables and reachable declarations [2024-11-13 14:34:37,223 WARN L250 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_44d2f74b-8f25-498a-b792-4268e6d41a37/sv-benchmarks/c/weaver/unroll-cond-3.wvr.c[2667,2680] [2024-11-13 14:34:37,241 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-13 14:34:37,254 INFO L200 MainTranslator]: Completed pre-run [2024-11-13 14:34:37,288 WARN L250 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_44d2f74b-8f25-498a-b792-4268e6d41a37/sv-benchmarks/c/weaver/unroll-cond-3.wvr.c[2667,2680] [2024-11-13 14:34:37,296 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-13 14:34:37,318 INFO L204 MainTranslator]: Completed translation [2024-11-13 14:34:37,318 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 02:34:37 WrapperNode [2024-11-13 14:34:37,319 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-11-13 14:34:37,320 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-11-13 14:34:37,321 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-11-13 14:34:37,321 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-11-13 14:34:37,332 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 02:34:37" (1/1) ... [2024-11-13 14:34:37,340 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 02:34:37" (1/1) ... [2024-11-13 14:34:37,371 INFO L138 Inliner]: procedures = 23, calls = 27, calls flagged for inlining = 13, calls inlined = 13, statements flattened = 152 [2024-11-13 14:34:37,375 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-11-13 14:34:37,376 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-11-13 14:34:37,376 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-11-13 14:34:37,376 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-11-13 14:34:37,387 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 02:34:37" (1/1) ... [2024-11-13 14:34:37,387 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 02:34:37" (1/1) ... [2024-11-13 14:34:37,393 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 02:34:37" (1/1) ... [2024-11-13 14:34:37,414 INFO L175 MemorySlicer]: Split 9 memory accesses to 2 slices as follows [2, 7]. 78 percent of accesses are in the largest equivalence class. The 2 initializations are split as follows [2, 0]. The 1 writes are split as follows [0, 1]. [2024-11-13 14:34:37,414 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 02:34:37" (1/1) ... [2024-11-13 14:34:37,414 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 02:34:37" (1/1) ... [2024-11-13 14:34:37,426 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 02:34:37" (1/1) ... [2024-11-13 14:34:37,434 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 02:34:37" (1/1) ... [2024-11-13 14:34:37,435 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 02:34:37" (1/1) ... [2024-11-13 14:34:37,436 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 02:34:37" (1/1) ... [2024-11-13 14:34:37,445 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-11-13 14:34:37,446 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-11-13 14:34:37,446 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-11-13 14:34:37,446 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-11-13 14:34:37,448 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 02:34:37" (1/1) ... [2024-11-13 14:34:37,457 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-11-13 14:34:37,468 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44d2f74b-8f25-498a-b792-4268e6d41a37/bin/uautomizer-verify-qhAvR1uOyd/z3 [2024-11-13 14:34:37,481 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44d2f74b-8f25-498a-b792-4268e6d41a37/bin/uautomizer-verify-qhAvR1uOyd/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (exit command is (exit), workingDir is null) [2024-11-13 14:34:37,487 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44d2f74b-8f25-498a-b792-4268e6d41a37/bin/uautomizer-verify-qhAvR1uOyd/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Waiting until timeout for monitored process [2024-11-13 14:34:37,512 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-11-13 14:34:37,512 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2024-11-13 14:34:37,512 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2024-11-13 14:34:37,513 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2024-11-13 14:34:37,513 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2024-11-13 14:34:37,513 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-11-13 14:34:37,513 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#1 [2024-11-13 14:34:37,513 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#0 [2024-11-13 14:34:37,513 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#1 [2024-11-13 14:34:37,513 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2024-11-13 14:34:37,513 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-11-13 14:34:37,513 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-11-13 14:34:37,513 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#0 [2024-11-13 14:34:37,513 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#1 [2024-11-13 14:34:37,515 WARN L207 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement. [2024-11-13 14:34:37,635 INFO L238 CfgBuilder]: Building ICFG [2024-11-13 14:34:37,637 INFO L264 CfgBuilder]: Building CFG for each procedure with an implementation [2024-11-13 14:34:38,007 INFO L283 CfgBuilder]: Omitted future-live optimization because the input is a concurrent program. [2024-11-13 14:34:38,007 INFO L287 CfgBuilder]: Performing block encoding [2024-11-13 14:34:38,326 INFO L311 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-11-13 14:34:38,326 INFO L316 CfgBuilder]: Removed 3 assume(true) statements. [2024-11-13 14:34:38,327 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.11 02:34:38 BoogieIcfgContainer [2024-11-13 14:34:38,327 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-11-13 14:34:38,330 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-11-13 14:34:38,330 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-11-13 14:34:38,335 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-11-13 14:34:38,335 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 13.11 02:34:36" (1/3) ... [2024-11-13 14:34:38,336 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3b770cae and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.11 02:34:38, skipping insertion in model container [2024-11-13 14:34:38,336 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 02:34:37" (2/3) ... [2024-11-13 14:34:38,336 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3b770cae and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.11 02:34:38, skipping insertion in model container [2024-11-13 14:34:38,336 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.11 02:34:38" (3/3) ... [2024-11-13 14:34:38,338 INFO L112 eAbstractionObserver]: Analyzing ICFG unroll-cond-3.wvr.c [2024-11-13 14:34:38,355 INFO L217 ceAbstractionStarter]: Automizer settings: Hoare:LoopHeads NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-11-13 14:34:38,357 INFO L154 ceAbstractionStarter]: Applying trace abstraction to ICFG unroll-cond-3.wvr.c that has 3 procedures, 18 locations, 1 initial locations, 3 loop locations, and 1 error locations. [2024-11-13 14:34:38,357 INFO L492 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2024-11-13 14:34:38,435 INFO L143 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2024-11-13 14:34:38,480 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 24 places, 20 transitions, 54 flow [2024-11-13 14:34:38,517 INFO L124 PetriNetUnfolderBase]: 3/18 cut-off events. [2024-11-13 14:34:38,522 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2024-11-13 14:34:38,526 INFO L83 FinitePrefix]: Finished finitePrefix Result has 27 conditions, 18 events. 3/18 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. 0/14 useless extension candidates. Maximal degree in co-relation 11. Up to 2 conditions per place. [2024-11-13 14:34:38,527 INFO L82 GeneralOperation]: Start removeDead. Operand has 24 places, 20 transitions, 54 flow [2024-11-13 14:34:38,530 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 21 places, 17 transitions, 46 flow [2024-11-13 14:34:38,542 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-11-13 14:34:38,554 INFO L333 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, 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;@742d7890, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-11-13 14:34:38,554 INFO L334 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2024-11-13 14:34:38,570 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2024-11-13 14:34:38,571 INFO L124 PetriNetUnfolderBase]: 3/16 cut-off events. [2024-11-13 14:34:38,571 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2024-11-13 14:34:38,571 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-13 14:34:38,571 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-13 14:34:38,572 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-11-13 14:34:38,577 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-13 14:34:38,577 INFO L85 PathProgramCache]: Analyzing trace with hash -1198674992, now seen corresponding path program 1 times [2024-11-13 14:34:38,585 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-13 14:34:38,586 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1379136294] [2024-11-13 14:34:38,586 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-13 14:34:38,587 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-13 14:34:38,715 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 14:34:39,139 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-13 14:34:39,141 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-13 14:34:39,141 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1379136294] [2024-11-13 14:34:39,143 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1379136294] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-13 14:34:39,143 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-13 14:34:39,146 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-11-13 14:34:39,148 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [566892691] [2024-11-13 14:34:39,148 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-13 14:34:39,157 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-13 14:34:39,163 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-13 14:34:39,193 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-13 14:34:39,194 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-13 14:34:39,196 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 20 [2024-11-13 14:34:39,199 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 21 places, 17 transitions, 46 flow. Second operand has 3 states, 3 states have (on average 7.333333333333333) internal successors, (22), 3 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-13 14:34:39,200 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-13 14:34:39,200 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 20 [2024-11-13 14:34:39,201 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-13 14:34:39,346 INFO L124 PetriNetUnfolderBase]: 38/71 cut-off events. [2024-11-13 14:34:39,346 INFO L125 PetriNetUnfolderBase]: For 8/8 co-relation queries the response was YES. [2024-11-13 14:34:39,348 INFO L83 FinitePrefix]: Finished finitePrefix Result has 157 conditions, 71 events. 38/71 cut-off events. For 8/8 co-relation queries the response was YES. Maximal size of possible extension queue 7. Compared 121 event pairs, 22 based on Foata normal form. 0/55 useless extension candidates. Maximal degree in co-relation 120. Up to 70 conditions per place. [2024-11-13 14:34:39,352 INFO L140 encePairwiseOnDemand]: 17/20 looper letters, 15 selfloop transitions, 2 changer transitions 0/18 dead transitions. [2024-11-13 14:34:39,352 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 23 places, 18 transitions, 82 flow [2024-11-13 14:34:39,353 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-13 14:34:39,356 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-11-13 14:34:39,371 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 27 transitions. [2024-11-13 14:34:39,374 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.45 [2024-11-13 14:34:39,377 INFO L175 Difference]: Start difference. First operand has 21 places, 17 transitions, 46 flow. Second operand 3 states and 27 transitions. [2024-11-13 14:34:39,378 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 23 places, 18 transitions, 82 flow [2024-11-13 14:34:39,387 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 19 places, 18 transitions, 74 flow, removed 0 selfloop flow, removed 4 redundant places. [2024-11-13 14:34:39,393 INFO L231 Difference]: Finished difference. Result has 20 places, 18 transitions, 50 flow [2024-11-13 14:34:39,396 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=20, PETRI_DIFFERENCE_MINUEND_FLOW=38, PETRI_DIFFERENCE_MINUEND_PLACES=17, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=17, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=15, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=50, PETRI_PLACES=20, PETRI_TRANSITIONS=18} [2024-11-13 14:34:39,401 INFO L277 CegarLoopForPetriNet]: 21 programPoint places, -1 predicate places. [2024-11-13 14:34:39,403 INFO L471 AbstractCegarLoop]: Abstraction has has 20 places, 18 transitions, 50 flow [2024-11-13 14:34:39,403 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 7.333333333333333) internal successors, (22), 3 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-13 14:34:39,404 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-13 14:34:39,404 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-13 14:34:39,404 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-11-13 14:34:39,405 INFO L396 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-11-13 14:34:39,407 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-13 14:34:39,407 INFO L85 PathProgramCache]: Analyzing trace with hash -509645796, now seen corresponding path program 1 times [2024-11-13 14:34:39,407 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-13 14:34:39,409 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1559282465] [2024-11-13 14:34:39,410 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-13 14:34:39,410 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-13 14:34:39,532 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 14:34:40,171 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-13 14:34:40,172 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-13 14:34:40,172 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1559282465] [2024-11-13 14:34:40,172 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1559282465] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-13 14:34:40,172 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-13 14:34:40,172 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-11-13 14:34:40,172 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [48439631] [2024-11-13 14:34:40,173 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-13 14:34:40,174 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-11-13 14:34:40,174 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-13 14:34:40,176 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-11-13 14:34:40,176 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2024-11-13 14:34:40,176 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 20 [2024-11-13 14:34:40,177 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 20 places, 18 transitions, 50 flow. Second operand has 6 states, 6 states have (on average 5.333333333333333) internal successors, (32), 6 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-13 14:34:40,177 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-13 14:34:40,177 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 20 [2024-11-13 14:34:40,177 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-13 14:34:40,562 INFO L124 PetriNetUnfolderBase]: 68/120 cut-off events. [2024-11-13 14:34:40,563 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2024-11-13 14:34:40,563 INFO L83 FinitePrefix]: Finished finitePrefix Result has 254 conditions, 120 events. 68/120 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 13. Compared 307 event pairs, 1 based on Foata normal form. 0/91 useless extension candidates. Maximal degree in co-relation 243. Up to 80 conditions per place. [2024-11-13 14:34:40,565 INFO L140 encePairwiseOnDemand]: 13/20 looper letters, 30 selfloop transitions, 12 changer transitions 0/43 dead transitions. [2024-11-13 14:34:40,565 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 25 places, 43 transitions, 189 flow [2024-11-13 14:34:40,566 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-11-13 14:34:40,566 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-11-13 14:34:40,567 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 60 transitions. [2024-11-13 14:34:40,568 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5 [2024-11-13 14:34:40,569 INFO L175 Difference]: Start difference. First operand has 20 places, 18 transitions, 50 flow. Second operand 6 states and 60 transitions. [2024-11-13 14:34:40,569 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 25 places, 43 transitions, 189 flow [2024-11-13 14:34:40,570 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 24 places, 43 transitions, 185 flow, removed 1 selfloop flow, removed 1 redundant places. [2024-11-13 14:34:40,572 INFO L231 Difference]: Finished difference. Result has 27 places, 29 transitions, 117 flow [2024-11-13 14:34:40,572 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=20, PETRI_DIFFERENCE_MINUEND_FLOW=46, PETRI_DIFFERENCE_MINUEND_PLACES=19, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=18, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=11, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=117, PETRI_PLACES=27, PETRI_TRANSITIONS=29} [2024-11-13 14:34:40,572 INFO L277 CegarLoopForPetriNet]: 21 programPoint places, 6 predicate places. [2024-11-13 14:34:40,573 INFO L471 AbstractCegarLoop]: Abstraction has has 27 places, 29 transitions, 117 flow [2024-11-13 14:34:40,573 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 5.333333333333333) internal successors, (32), 6 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-13 14:34:40,573 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-13 14:34:40,573 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-13 14:34:40,573 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-11-13 14:34:40,573 INFO L396 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-11-13 14:34:40,574 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-13 14:34:40,574 INFO L85 PathProgramCache]: Analyzing trace with hash 1670535764, now seen corresponding path program 2 times [2024-11-13 14:34:40,574 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-13 14:34:40,576 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [410769768] [2024-11-13 14:34:40,576 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-13 14:34:40,576 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-13 14:34:40,657 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 14:34:41,080 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-13 14:34:41,081 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-13 14:34:41,081 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [410769768] [2024-11-13 14:34:41,081 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [410769768] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-13 14:34:41,081 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-13 14:34:41,081 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-11-13 14:34:41,081 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1810891846] [2024-11-13 14:34:41,082 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-13 14:34:41,082 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-11-13 14:34:41,082 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-13 14:34:41,084 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-11-13 14:34:41,085 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=16, Unknown=0, NotChecked=0, Total=30 [2024-11-13 14:34:41,085 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 20 [2024-11-13 14:34:41,085 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 27 places, 29 transitions, 117 flow. Second operand has 6 states, 6 states have (on average 5.333333333333333) internal successors, (32), 6 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-13 14:34:41,085 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-13 14:34:41,085 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 20 [2024-11-13 14:34:41,085 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-13 14:34:41,317 INFO L124 PetriNetUnfolderBase]: 77/134 cut-off events. [2024-11-13 14:34:41,318 INFO L125 PetriNetUnfolderBase]: For 43/43 co-relation queries the response was YES. [2024-11-13 14:34:41,319 INFO L83 FinitePrefix]: Finished finitePrefix Result has 422 conditions, 134 events. 77/134 cut-off events. For 43/43 co-relation queries the response was YES. Maximal size of possible extension queue 14. Compared 338 event pairs, 6 based on Foata normal form. 0/109 useless extension candidates. Maximal degree in co-relation 403. Up to 89 conditions per place. [2024-11-13 14:34:41,320 INFO L140 encePairwiseOnDemand]: 13/20 looper letters, 28 selfloop transitions, 18 changer transitions 0/47 dead transitions. [2024-11-13 14:34:41,320 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 32 places, 47 transitions, 278 flow [2024-11-13 14:34:41,321 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-11-13 14:34:41,321 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-11-13 14:34:41,322 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 58 transitions. [2024-11-13 14:34:41,322 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.48333333333333334 [2024-11-13 14:34:41,323 INFO L175 Difference]: Start difference. First operand has 27 places, 29 transitions, 117 flow. Second operand 6 states and 58 transitions. [2024-11-13 14:34:41,323 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 32 places, 47 transitions, 278 flow [2024-11-13 14:34:41,324 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 32 places, 47 transitions, 270 flow, removed 4 selfloop flow, removed 0 redundant places. [2024-11-13 14:34:41,327 INFO L231 Difference]: Finished difference. Result has 35 places, 37 transitions, 212 flow [2024-11-13 14:34:41,327 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=20, PETRI_DIFFERENCE_MINUEND_FLOW=113, PETRI_DIFFERENCE_MINUEND_PLACES=27, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=29, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=16, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=212, PETRI_PLACES=35, PETRI_TRANSITIONS=37} [2024-11-13 14:34:41,329 INFO L277 CegarLoopForPetriNet]: 21 programPoint places, 14 predicate places. [2024-11-13 14:34:41,329 INFO L471 AbstractCegarLoop]: Abstraction has has 35 places, 37 transitions, 212 flow [2024-11-13 14:34:41,329 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 5.333333333333333) internal successors, (32), 6 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-13 14:34:41,329 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-13 14:34:41,329 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-13 14:34:41,330 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2024-11-13 14:34:41,330 INFO L396 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-11-13 14:34:41,331 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-13 14:34:41,331 INFO L85 PathProgramCache]: Analyzing trace with hash -369442890, now seen corresponding path program 3 times [2024-11-13 14:34:41,331 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-13 14:34:41,331 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1800027294] [2024-11-13 14:34:41,331 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-13 14:34:41,332 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-13 14:34:41,373 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 14:34:41,682 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-13 14:34:41,683 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-13 14:34:41,683 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1800027294] [2024-11-13 14:34:41,683 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1800027294] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-13 14:34:41,683 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-13 14:34:41,683 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-11-13 14:34:41,684 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [207800317] [2024-11-13 14:34:41,684 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-13 14:34:41,685 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-11-13 14:34:41,685 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-13 14:34:41,685 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-11-13 14:34:41,685 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=16, Unknown=0, NotChecked=0, Total=30 [2024-11-13 14:34:41,685 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 20 [2024-11-13 14:34:41,686 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 35 places, 37 transitions, 212 flow. Second operand has 6 states, 6 states have (on average 5.333333333333333) internal successors, (32), 6 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-13 14:34:41,686 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-13 14:34:41,686 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 20 [2024-11-13 14:34:41,686 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-13 14:34:41,875 INFO L124 PetriNetUnfolderBase]: 78/147 cut-off events. [2024-11-13 14:34:41,876 INFO L125 PetriNetUnfolderBase]: For 101/101 co-relation queries the response was YES. [2024-11-13 14:34:41,877 INFO L83 FinitePrefix]: Finished finitePrefix Result has 543 conditions, 147 events. 78/147 cut-off events. For 101/101 co-relation queries the response was YES. Maximal size of possible extension queue 15. Compared 405 event pairs, 1 based on Foata normal form. 1/121 useless extension candidates. Maximal degree in co-relation 519. Up to 86 conditions per place. [2024-11-13 14:34:41,880 INFO L140 encePairwiseOnDemand]: 12/20 looper letters, 33 selfloop transitions, 19 changer transitions 2/55 dead transitions. [2024-11-13 14:34:41,881 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 40 places, 55 transitions, 379 flow [2024-11-13 14:34:41,881 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-11-13 14:34:41,881 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-11-13 14:34:41,882 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 64 transitions. [2024-11-13 14:34:41,883 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5333333333333333 [2024-11-13 14:34:41,884 INFO L175 Difference]: Start difference. First operand has 35 places, 37 transitions, 212 flow. Second operand 6 states and 64 transitions. [2024-11-13 14:34:41,884 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 40 places, 55 transitions, 379 flow [2024-11-13 14:34:41,889 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 39 places, 55 transitions, 355 flow, removed 5 selfloop flow, removed 1 redundant places. [2024-11-13 14:34:41,892 INFO L231 Difference]: Finished difference. Result has 41 places, 39 transitions, 258 flow [2024-11-13 14:34:41,892 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=20, PETRI_DIFFERENCE_MINUEND_FLOW=188, PETRI_DIFFERENCE_MINUEND_PLACES=34, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=37, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=17, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=18, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=258, PETRI_PLACES=41, PETRI_TRANSITIONS=39} [2024-11-13 14:34:41,893 INFO L277 CegarLoopForPetriNet]: 21 programPoint places, 20 predicate places. [2024-11-13 14:34:41,894 INFO L471 AbstractCegarLoop]: Abstraction has has 41 places, 39 transitions, 258 flow [2024-11-13 14:34:41,894 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 5.333333333333333) internal successors, (32), 6 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-13 14:34:41,894 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-13 14:34:41,894 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-13 14:34:41,895 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2024-11-13 14:34:41,895 INFO L396 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-11-13 14:34:41,895 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-13 14:34:41,896 INFO L85 PathProgramCache]: Analyzing trace with hash 74277722, now seen corresponding path program 4 times [2024-11-13 14:34:41,896 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-13 14:34:41,897 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [779753397] [2024-11-13 14:34:41,897 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-13 14:34:41,897 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-13 14:34:41,934 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 14:34:42,299 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-13 14:34:42,299 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-13 14:34:42,299 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [779753397] [2024-11-13 14:34:42,300 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [779753397] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-13 14:34:42,300 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-13 14:34:42,300 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-11-13 14:34:42,300 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [141890027] [2024-11-13 14:34:42,300 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-13 14:34:42,300 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-11-13 14:34:42,300 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-13 14:34:42,301 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-11-13 14:34:42,301 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2024-11-13 14:34:42,301 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 20 [2024-11-13 14:34:42,301 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 41 places, 39 transitions, 258 flow. Second operand has 6 states, 6 states have (on average 5.333333333333333) internal successors, (32), 6 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-13 14:34:42,301 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-13 14:34:42,301 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 20 [2024-11-13 14:34:42,301 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-13 14:34:42,478 INFO L124 PetriNetUnfolderBase]: 75/134 cut-off events. [2024-11-13 14:34:42,478 INFO L125 PetriNetUnfolderBase]: For 208/208 co-relation queries the response was YES. [2024-11-13 14:34:42,479 INFO L83 FinitePrefix]: Finished finitePrefix Result has 547 conditions, 134 events. 75/134 cut-off events. For 208/208 co-relation queries the response was YES. Maximal size of possible extension queue 15. Compared 353 event pairs, 1 based on Foata normal form. 3/117 useless extension candidates. Maximal degree in co-relation 520. Up to 89 conditions per place. [2024-11-13 14:34:42,480 INFO L140 encePairwiseOnDemand]: 13/20 looper letters, 31 selfloop transitions, 18 changer transitions 0/50 dead transitions. [2024-11-13 14:34:42,481 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 46 places, 50 transitions, 381 flow [2024-11-13 14:34:42,481 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-11-13 14:34:42,481 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-11-13 14:34:42,482 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 60 transitions. [2024-11-13 14:34:42,482 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5 [2024-11-13 14:34:42,482 INFO L175 Difference]: Start difference. First operand has 41 places, 39 transitions, 258 flow. Second operand 6 states and 60 transitions. [2024-11-13 14:34:42,482 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 46 places, 50 transitions, 381 flow [2024-11-13 14:34:42,486 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 44 places, 50 transitions, 357 flow, removed 3 selfloop flow, removed 2 redundant places. [2024-11-13 14:34:42,487 INFO L231 Difference]: Finished difference. Result has 45 places, 39 transitions, 277 flow [2024-11-13 14:34:42,488 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=20, PETRI_DIFFERENCE_MINUEND_FLOW=224, PETRI_DIFFERENCE_MINUEND_PLACES=39, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=38, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=17, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=20, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=277, PETRI_PLACES=45, PETRI_TRANSITIONS=39} [2024-11-13 14:34:42,488 INFO L277 CegarLoopForPetriNet]: 21 programPoint places, 24 predicate places. [2024-11-13 14:34:42,489 INFO L471 AbstractCegarLoop]: Abstraction has has 45 places, 39 transitions, 277 flow [2024-11-13 14:34:42,489 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 5.333333333333333) internal successors, (32), 6 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-13 14:34:42,489 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-13 14:34:42,489 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-13 14:34:42,489 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2024-11-13 14:34:42,489 INFO L396 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-11-13 14:34:42,490 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-13 14:34:42,490 INFO L85 PathProgramCache]: Analyzing trace with hash 1749184004, now seen corresponding path program 5 times [2024-11-13 14:34:42,490 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-13 14:34:42,490 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1898384306] [2024-11-13 14:34:42,490 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-13 14:34:42,490 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-13 14:34:42,520 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 14:34:42,731 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-13 14:34:42,731 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-13 14:34:42,731 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1898384306] [2024-11-13 14:34:42,731 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1898384306] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-13 14:34:42,732 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-13 14:34:42,732 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-11-13 14:34:42,732 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1062672062] [2024-11-13 14:34:42,732 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-13 14:34:42,732 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-11-13 14:34:42,732 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-13 14:34:42,733 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-11-13 14:34:42,733 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2024-11-13 14:34:42,733 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 20 [2024-11-13 14:34:42,733 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 45 places, 39 transitions, 277 flow. Second operand has 5 states, 5 states have (on average 5.8) internal successors, (29), 5 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-13 14:34:42,734 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-13 14:34:42,734 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 20 [2024-11-13 14:34:42,734 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-13 14:34:42,892 INFO L124 PetriNetUnfolderBase]: 88/154 cut-off events. [2024-11-13 14:34:42,892 INFO L125 PetriNetUnfolderBase]: For 283/283 co-relation queries the response was YES. [2024-11-13 14:34:42,893 INFO L83 FinitePrefix]: Finished finitePrefix Result has 633 conditions, 154 events. 88/154 cut-off events. For 283/283 co-relation queries the response was YES. Maximal size of possible extension queue 18. Compared 416 event pairs, 20 based on Foata normal form. 0/127 useless extension candidates. Maximal degree in co-relation 605. Up to 113 conditions per place. [2024-11-13 14:34:42,895 INFO L140 encePairwiseOnDemand]: 14/20 looper letters, 30 selfloop transitions, 18 changer transitions 0/49 dead transitions. [2024-11-13 14:34:42,895 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 49 places, 49 transitions, 411 flow [2024-11-13 14:34:42,895 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-11-13 14:34:42,896 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-11-13 14:34:42,896 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 47 transitions. [2024-11-13 14:34:42,896 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.47 [2024-11-13 14:34:42,896 INFO L175 Difference]: Start difference. First operand has 45 places, 39 transitions, 277 flow. Second operand 5 states and 47 transitions. [2024-11-13 14:34:42,896 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 49 places, 49 transitions, 411 flow [2024-11-13 14:34:42,901 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 45 places, 49 transitions, 375 flow, removed 1 selfloop flow, removed 4 redundant places. [2024-11-13 14:34:42,902 INFO L231 Difference]: Finished difference. Result has 47 places, 42 transitions, 315 flow [2024-11-13 14:34:42,902 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=20, PETRI_DIFFERENCE_MINUEND_FLOW=241, PETRI_DIFFERENCE_MINUEND_PLACES=41, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=39, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=15, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=21, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=315, PETRI_PLACES=47, PETRI_TRANSITIONS=42} [2024-11-13 14:34:42,903 INFO L277 CegarLoopForPetriNet]: 21 programPoint places, 26 predicate places. [2024-11-13 14:34:42,903 INFO L471 AbstractCegarLoop]: Abstraction has has 47 places, 42 transitions, 315 flow [2024-11-13 14:34:42,903 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 5.8) internal successors, (29), 5 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-13 14:34:42,903 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-13 14:34:42,903 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-13 14:34:42,904 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2024-11-13 14:34:42,904 INFO L396 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-11-13 14:34:42,904 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-13 14:34:42,904 INFO L85 PathProgramCache]: Analyzing trace with hash -35760054, now seen corresponding path program 6 times [2024-11-13 14:34:42,904 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-13 14:34:42,905 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [216571750] [2024-11-13 14:34:42,905 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-13 14:34:42,905 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-13 14:34:42,946 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 14:34:43,229 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-13 14:34:43,230 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-13 14:34:43,230 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [216571750] [2024-11-13 14:34:43,230 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [216571750] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-13 14:34:43,230 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-13 14:34:43,230 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-11-13 14:34:43,231 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1117580465] [2024-11-13 14:34:43,231 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-13 14:34:43,231 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-11-13 14:34:43,231 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-13 14:34:43,232 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-11-13 14:34:43,232 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2024-11-13 14:34:43,232 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 20 [2024-11-13 14:34:43,232 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 47 places, 42 transitions, 315 flow. Second operand has 5 states, 5 states have (on average 5.8) internal successors, (29), 5 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-13 14:34:43,232 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-13 14:34:43,232 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 20 [2024-11-13 14:34:43,233 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-13 14:34:43,394 INFO L124 PetriNetUnfolderBase]: 92/170 cut-off events. [2024-11-13 14:34:43,394 INFO L125 PetriNetUnfolderBase]: For 383/383 co-relation queries the response was YES. [2024-11-13 14:34:43,396 INFO L83 FinitePrefix]: Finished finitePrefix Result has 754 conditions, 170 events. 92/170 cut-off events. For 383/383 co-relation queries the response was YES. Maximal size of possible extension queue 20. Compared 497 event pairs, 20 based on Foata normal form. 0/145 useless extension candidates. Maximal degree in co-relation 725. Up to 99 conditions per place. [2024-11-13 14:34:43,397 INFO L140 encePairwiseOnDemand]: 14/20 looper letters, 37 selfloop transitions, 17 changer transitions 0/55 dead transitions. [2024-11-13 14:34:43,397 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 51 places, 55 transitions, 484 flow [2024-11-13 14:34:43,398 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-11-13 14:34:43,398 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-11-13 14:34:43,398 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 48 transitions. [2024-11-13 14:34:43,398 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.48 [2024-11-13 14:34:43,399 INFO L175 Difference]: Start difference. First operand has 47 places, 42 transitions, 315 flow. Second operand 5 states and 48 transitions. [2024-11-13 14:34:43,399 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 51 places, 55 transitions, 484 flow [2024-11-13 14:34:43,404 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 49 places, 55 transitions, 456 flow, removed 4 selfloop flow, removed 2 redundant places. [2024-11-13 14:34:43,405 INFO L231 Difference]: Finished difference. Result has 51 places, 44 transitions, 347 flow [2024-11-13 14:34:43,406 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=20, PETRI_DIFFERENCE_MINUEND_FLOW=287, PETRI_DIFFERENCE_MINUEND_PLACES=45, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=42, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=15, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=25, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=347, PETRI_PLACES=51, PETRI_TRANSITIONS=44} [2024-11-13 14:34:43,407 INFO L277 CegarLoopForPetriNet]: 21 programPoint places, 30 predicate places. [2024-11-13 14:34:43,407 INFO L471 AbstractCegarLoop]: Abstraction has has 51 places, 44 transitions, 347 flow [2024-11-13 14:34:43,407 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 5.8) internal successors, (29), 5 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-13 14:34:43,407 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-13 14:34:43,408 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-13 14:34:43,408 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2024-11-13 14:34:43,408 INFO L396 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-11-13 14:34:43,408 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-13 14:34:43,408 INFO L85 PathProgramCache]: Analyzing trace with hash 1637317854, now seen corresponding path program 1 times [2024-11-13 14:34:43,408 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-13 14:34:43,408 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1824982109] [2024-11-13 14:34:43,409 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-13 14:34:43,409 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-13 14:34:43,437 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 14:34:43,647 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-13 14:34:43,648 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-13 14:34:43,648 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1824982109] [2024-11-13 14:34:43,648 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1824982109] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-13 14:34:43,648 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2118070224] [2024-11-13 14:34:43,648 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-13 14:34:43,648 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-13 14:34:43,648 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44d2f74b-8f25-498a-b792-4268e6d41a37/bin/uautomizer-verify-qhAvR1uOyd/z3 [2024-11-13 14:34:43,650 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44d2f74b-8f25-498a-b792-4268e6d41a37/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-13 14:34:43,653 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44d2f74b-8f25-498a-b792-4268e6d41a37/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2024-11-13 14:34:43,750 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 14:34:43,753 INFO L255 TraceCheckSpWp]: Trace formula consists of 139 conjuncts, 31 conjuncts are in the unsatisfiable core [2024-11-13 14:34:43,759 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-13 14:34:43,842 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 [2024-11-13 14:34:44,269 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 [2024-11-13 14:34:44,290 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-13 14:34:44,290 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-13 14:34:45,476 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 [2024-11-13 14:34:45,493 INFO L349 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2024-11-13 14:34:45,493 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 [2024-11-13 14:34:45,539 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-13 14:34:45,539 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2118070224] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-13 14:34:45,540 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-13 14:34:45,540 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 9, 9] total 21 [2024-11-13 14:34:45,540 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1042621958] [2024-11-13 14:34:45,540 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-13 14:34:45,540 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2024-11-13 14:34:45,541 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-13 14:34:45,541 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2024-11-13 14:34:45,541 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=342, Unknown=0, NotChecked=0, Total=420 [2024-11-13 14:34:45,541 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 20 [2024-11-13 14:34:45,542 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 51 places, 44 transitions, 347 flow. Second operand has 21 states, 21 states have (on average 5.0476190476190474) internal successors, (106), 21 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-13 14:34:45,542 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-13 14:34:45,542 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 20 [2024-11-13 14:34:45,542 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-13 14:34:49,574 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.72s for a HTC check with result VALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2024-11-13 14:34:50,285 INFO L124 PetriNetUnfolderBase]: 189/373 cut-off events. [2024-11-13 14:34:50,285 INFO L125 PetriNetUnfolderBase]: For 837/837 co-relation queries the response was YES. [2024-11-13 14:34:50,287 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1611 conditions, 373 events. 189/373 cut-off events. For 837/837 co-relation queries the response was YES. Maximal size of possible extension queue 34. Compared 1507 event pairs, 3 based on Foata normal form. 4/315 useless extension candidates. Maximal degree in co-relation 1580. Up to 117 conditions per place. [2024-11-13 14:34:50,290 INFO L140 encePairwiseOnDemand]: 10/20 looper letters, 79 selfloop transitions, 45 changer transitions 3/128 dead transitions. [2024-11-13 14:34:50,290 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 69 places, 128 transitions, 1031 flow [2024-11-13 14:34:50,291 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2024-11-13 14:34:50,291 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19 states. [2024-11-13 14:34:50,292 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 169 transitions. [2024-11-13 14:34:50,292 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.44473684210526315 [2024-11-13 14:34:50,293 INFO L175 Difference]: Start difference. First operand has 51 places, 44 transitions, 347 flow. Second operand 19 states and 169 transitions. [2024-11-13 14:34:50,293 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 69 places, 128 transitions, 1031 flow [2024-11-13 14:34:50,298 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 67 places, 128 transitions, 975 flow, removed 5 selfloop flow, removed 2 redundant places. [2024-11-13 14:34:50,301 INFO L231 Difference]: Finished difference. Result has 74 places, 68 transitions, 652 flow [2024-11-13 14:34:50,301 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=20, PETRI_DIFFERENCE_MINUEND_FLOW=311, PETRI_DIFFERENCE_MINUEND_PLACES=49, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=44, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=25, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=17, PETRI_DIFFERENCE_SUBTRAHEND_STATES=19, PETRI_FLOW=652, PETRI_PLACES=74, PETRI_TRANSITIONS=68} [2024-11-13 14:34:50,302 INFO L277 CegarLoopForPetriNet]: 21 programPoint places, 53 predicate places. [2024-11-13 14:34:50,302 INFO L471 AbstractCegarLoop]: Abstraction has has 74 places, 68 transitions, 652 flow [2024-11-13 14:34:50,302 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 5.0476190476190474) internal successors, (106), 21 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-13 14:34:50,303 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-13 14:34:50,303 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-13 14:34:50,326 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44d2f74b-8f25-498a-b792-4268e6d41a37/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2024-11-13 14:34:50,503 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44d2f74b-8f25-498a-b792-4268e6d41a37/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable7 [2024-11-13 14:34:50,504 INFO L396 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-11-13 14:34:50,504 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-13 14:34:50,504 INFO L85 PathProgramCache]: Analyzing trace with hash -520082178, now seen corresponding path program 2 times [2024-11-13 14:34:50,504 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-13 14:34:50,505 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [785723264] [2024-11-13 14:34:50,505 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-13 14:34:50,505 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-13 14:34:50,532 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 14:34:50,768 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-13 14:34:50,770 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-13 14:34:50,770 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [785723264] [2024-11-13 14:34:50,770 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [785723264] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-13 14:34:50,770 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1561193755] [2024-11-13 14:34:50,770 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-13 14:34:50,770 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-13 14:34:50,771 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44d2f74b-8f25-498a-b792-4268e6d41a37/bin/uautomizer-verify-qhAvR1uOyd/z3 [2024-11-13 14:34:50,773 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44d2f74b-8f25-498a-b792-4268e6d41a37/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-13 14:34:50,775 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44d2f74b-8f25-498a-b792-4268e6d41a37/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2024-11-13 14:34:50,904 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-13 14:34:50,904 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-13 14:34:50,906 INFO L255 TraceCheckSpWp]: Trace formula consists of 139 conjuncts, 31 conjuncts are in the unsatisfiable core [2024-11-13 14:34:50,910 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-13 14:34:50,945 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 [2024-11-13 14:34:51,246 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 [2024-11-13 14:34:51,265 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-13 14:34:51,265 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-13 14:34:52,359 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 [2024-11-13 14:34:52,370 INFO L349 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2024-11-13 14:34:52,370 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 [2024-11-13 14:34:52,410 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-13 14:34:52,410 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1561193755] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-13 14:34:52,410 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-13 14:34:52,411 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 9, 9] total 21 [2024-11-13 14:34:52,411 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1948018285] [2024-11-13 14:34:52,411 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-13 14:34:52,411 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2024-11-13 14:34:52,412 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-13 14:34:52,412 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2024-11-13 14:34:52,412 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=340, Unknown=0, NotChecked=0, Total=420 [2024-11-13 14:34:52,412 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 20 [2024-11-13 14:34:52,413 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 74 places, 68 transitions, 652 flow. Second operand has 21 states, 21 states have (on average 5.0476190476190474) internal successors, (106), 21 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-13 14:34:52,413 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-13 14:34:52,413 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 20 [2024-11-13 14:34:52,413 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-13 14:34:55,038 INFO L124 PetriNetUnfolderBase]: 221/456 cut-off events. [2024-11-13 14:34:55,038 INFO L125 PetriNetUnfolderBase]: For 1850/1850 co-relation queries the response was YES. [2024-11-13 14:34:55,040 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2312 conditions, 456 events. 221/456 cut-off events. For 1850/1850 co-relation queries the response was YES. Maximal size of possible extension queue 42. Compared 2066 event pairs, 5 based on Foata normal form. 4/433 useless extension candidates. Maximal degree in co-relation 2271. Up to 149 conditions per place. [2024-11-13 14:34:55,043 INFO L140 encePairwiseOnDemand]: 10/20 looper letters, 86 selfloop transitions, 57 changer transitions 10/154 dead transitions. [2024-11-13 14:34:55,043 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 95 places, 154 transitions, 1447 flow [2024-11-13 14:34:55,043 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2024-11-13 14:34:55,044 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2024-11-13 14:34:55,045 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 194 transitions. [2024-11-13 14:34:55,048 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.4409090909090909 [2024-11-13 14:34:55,049 INFO L175 Difference]: Start difference. First operand has 74 places, 68 transitions, 652 flow. Second operand 22 states and 194 transitions. [2024-11-13 14:34:55,049 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 95 places, 154 transitions, 1447 flow [2024-11-13 14:34:55,063 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 91 places, 154 transitions, 1273 flow, removed 75 selfloop flow, removed 4 redundant places. [2024-11-13 14:34:55,065 INFO L231 Difference]: Finished difference. Result has 96 places, 84 transitions, 816 flow [2024-11-13 14:34:55,067 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=20, PETRI_DIFFERENCE_MINUEND_FLOW=528, PETRI_DIFFERENCE_MINUEND_PLACES=70, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=68, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=42, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=23, PETRI_DIFFERENCE_SUBTRAHEND_STATES=22, PETRI_FLOW=816, PETRI_PLACES=96, PETRI_TRANSITIONS=84} [2024-11-13 14:34:55,068 INFO L277 CegarLoopForPetriNet]: 21 programPoint places, 75 predicate places. [2024-11-13 14:34:55,069 INFO L471 AbstractCegarLoop]: Abstraction has has 96 places, 84 transitions, 816 flow [2024-11-13 14:34:55,069 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 5.0476190476190474) internal successors, (106), 21 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-13 14:34:55,069 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-13 14:34:55,069 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-13 14:34:55,089 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44d2f74b-8f25-498a-b792-4268e6d41a37/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2024-11-13 14:34:55,273 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44d2f74b-8f25-498a-b792-4268e6d41a37/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable8 [2024-11-13 14:34:55,274 INFO L396 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-11-13 14:34:55,274 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-13 14:34:55,275 INFO L85 PathProgramCache]: Analyzing trace with hash -441433938, now seen corresponding path program 3 times [2024-11-13 14:34:55,275 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-13 14:34:55,275 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1767586957] [2024-11-13 14:34:55,276 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-13 14:34:55,276 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-13 14:34:55,298 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 14:34:55,483 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-13 14:34:55,483 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-13 14:34:55,483 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1767586957] [2024-11-13 14:34:55,483 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1767586957] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-13 14:34:55,483 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [25936437] [2024-11-13 14:34:55,483 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-13 14:34:55,484 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-13 14:34:55,484 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44d2f74b-8f25-498a-b792-4268e6d41a37/bin/uautomizer-verify-qhAvR1uOyd/z3 [2024-11-13 14:34:55,486 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44d2f74b-8f25-498a-b792-4268e6d41a37/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-13 14:34:55,488 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44d2f74b-8f25-498a-b792-4268e6d41a37/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2024-11-13 14:34:55,572 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2024-11-13 14:34:55,572 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-13 14:34:55,573 INFO L255 TraceCheckSpWp]: Trace formula consists of 139 conjuncts, 31 conjuncts are in the unsatisfiable core [2024-11-13 14:34:55,576 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-13 14:34:55,609 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 [2024-11-13 14:34:55,821 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-13 14:34:55,821 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 [2024-11-13 14:34:56,071 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-13 14:34:56,071 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-13 14:34:56,772 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 [2024-11-13 14:34:56,781 INFO L349 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2024-11-13 14:34:56,781 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 [2024-11-13 14:34:56,816 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-13 14:34:56,816 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [25936437] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-13 14:34:56,816 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-13 14:34:56,816 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 9, 9] total 21 [2024-11-13 14:34:56,817 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [865962725] [2024-11-13 14:34:56,817 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-13 14:34:56,817 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2024-11-13 14:34:56,817 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-13 14:34:56,818 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2024-11-13 14:34:56,818 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=337, Unknown=0, NotChecked=0, Total=420 [2024-11-13 14:34:56,818 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 20 [2024-11-13 14:34:56,818 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 96 places, 84 transitions, 816 flow. Second operand has 21 states, 21 states have (on average 5.0) internal successors, (105), 21 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) [2024-11-13 14:34:56,819 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-13 14:34:56,819 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 20 [2024-11-13 14:34:56,819 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-13 14:34:58,190 INFO L124 PetriNetUnfolderBase]: 216/441 cut-off events. [2024-11-13 14:34:58,191 INFO L125 PetriNetUnfolderBase]: For 2338/2338 co-relation queries the response was YES. [2024-11-13 14:34:58,193 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2291 conditions, 441 events. 216/441 cut-off events. For 2338/2338 co-relation queries the response was YES. Maximal size of possible extension queue 40. Compared 1941 event pairs, 5 based on Foata normal form. 2/426 useless extension candidates. Maximal degree in co-relation 2244. Up to 167 conditions per place. [2024-11-13 14:34:58,196 INFO L140 encePairwiseOnDemand]: 11/20 looper letters, 74 selfloop transitions, 52 changer transitions 6/133 dead transitions. [2024-11-13 14:34:58,196 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 110 places, 133 transitions, 1306 flow [2024-11-13 14:34:58,197 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2024-11-13 14:34:58,197 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2024-11-13 14:34:58,198 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 151 transitions. [2024-11-13 14:34:58,198 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.4441176470588235 [2024-11-13 14:34:58,199 INFO L175 Difference]: Start difference. First operand has 96 places, 84 transitions, 816 flow. Second operand 17 states and 151 transitions. [2024-11-13 14:34:58,199 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 110 places, 133 transitions, 1306 flow [2024-11-13 14:34:58,209 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 103 places, 133 transitions, 1218 flow, removed 21 selfloop flow, removed 7 redundant places. [2024-11-13 14:34:58,211 INFO L231 Difference]: Finished difference. Result has 104 places, 83 transitions, 831 flow [2024-11-13 14:34:58,212 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=20, PETRI_DIFFERENCE_MINUEND_FLOW=721, PETRI_DIFFERENCE_MINUEND_PLACES=87, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=83, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=52, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=31, PETRI_DIFFERENCE_SUBTRAHEND_STATES=17, PETRI_FLOW=831, PETRI_PLACES=104, PETRI_TRANSITIONS=83} [2024-11-13 14:34:58,212 INFO L277 CegarLoopForPetriNet]: 21 programPoint places, 83 predicate places. [2024-11-13 14:34:58,212 INFO L471 AbstractCegarLoop]: Abstraction has has 104 places, 83 transitions, 831 flow [2024-11-13 14:34:58,213 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 5.0) internal successors, (105), 21 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) [2024-11-13 14:34:58,213 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-13 14:34:58,213 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-13 14:34:58,233 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44d2f74b-8f25-498a-b792-4268e6d41a37/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2024-11-13 14:34:58,413 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44d2f74b-8f25-498a-b792-4268e6d41a37/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-13 14:34:58,414 INFO L396 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-11-13 14:34:58,414 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-13 14:34:58,414 INFO L85 PathProgramCache]: Analyzing trace with hash 1446220239, now seen corresponding path program 1 times [2024-11-13 14:34:58,414 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-13 14:34:58,414 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2010093478] [2024-11-13 14:34:58,414 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-13 14:34:58,414 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-13 14:34:58,437 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 14:34:58,595 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-13 14:34:58,595 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-13 14:34:58,595 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2010093478] [2024-11-13 14:34:58,596 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2010093478] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-13 14:34:58,596 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [615247803] [2024-11-13 14:34:58,596 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-13 14:34:58,596 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-13 14:34:58,596 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44d2f74b-8f25-498a-b792-4268e6d41a37/bin/uautomizer-verify-qhAvR1uOyd/z3 [2024-11-13 14:34:58,598 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44d2f74b-8f25-498a-b792-4268e6d41a37/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-13 14:34:58,600 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44d2f74b-8f25-498a-b792-4268e6d41a37/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2024-11-13 14:34:58,690 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 14:34:58,692 INFO L255 TraceCheckSpWp]: Trace formula consists of 141 conjuncts, 34 conjuncts are in the unsatisfiable core [2024-11-13 14:34:58,694 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-13 14:34:58,725 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 [2024-11-13 14:34:59,067 INFO L349 Elim1Store]: treesize reduction 39, result has 20.4 percent of original size [2024-11-13 14:34:59,068 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 7 new quantified variables, introduced 6 case distinctions, treesize of input 154 treesize of output 88 [2024-11-13 14:34:59,114 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-13 14:34:59,114 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-13 14:35:00,913 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 318 treesize of output 280 [2024-11-13 14:35:01,237 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-13 14:35:01,238 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 0 disjoint index pairs (out of 21 index pairs), introduced 12 new quantified variables, introduced 21 case distinctions, treesize of input 1184 treesize of output 868 [2024-11-13 14:35:31,760 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-13 14:35:31,760 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [615247803] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-13 14:35:31,760 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-13 14:35:31,760 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 9, 8] total 21 [2024-11-13 14:35:31,760 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [401974844] [2024-11-13 14:35:31,760 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-13 14:35:31,762 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2024-11-13 14:35:31,762 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-13 14:35:31,763 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2024-11-13 14:35:31,764 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=103, Invalid=317, Unknown=0, NotChecked=0, Total=420 [2024-11-13 14:35:31,765 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 20 [2024-11-13 14:35:31,766 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 104 places, 83 transitions, 831 flow. Second operand has 21 states, 21 states have (on average 5.142857142857143) internal successors, (108), 21 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) [2024-11-13 14:35:31,766 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-13 14:35:31,766 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 20 [2024-11-13 14:35:31,766 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-13 14:35:33,584 INFO L124 PetriNetUnfolderBase]: 461/899 cut-off events. [2024-11-13 14:35:33,585 INFO L125 PetriNetUnfolderBase]: For 5571/5571 co-relation queries the response was YES. [2024-11-13 14:35:33,588 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4783 conditions, 899 events. 461/899 cut-off events. For 5571/5571 co-relation queries the response was YES. Maximal size of possible extension queue 83. Compared 4685 event pairs, 13 based on Foata normal form. 4/856 useless extension candidates. Maximal degree in co-relation 4497. Up to 294 conditions per place. [2024-11-13 14:35:33,593 INFO L140 encePairwiseOnDemand]: 10/20 looper letters, 118 selfloop transitions, 91 changer transitions 31/241 dead transitions. [2024-11-13 14:35:33,593 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 130 places, 241 transitions, 2508 flow [2024-11-13 14:35:33,594 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2024-11-13 14:35:33,594 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2024-11-13 14:35:33,595 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 231 transitions. [2024-11-13 14:35:33,595 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.4125 [2024-11-13 14:35:33,595 INFO L175 Difference]: Start difference. First operand has 104 places, 83 transitions, 831 flow. Second operand 28 states and 231 transitions. [2024-11-13 14:35:33,595 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 130 places, 241 transitions, 2508 flow [2024-11-13 14:35:33,617 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 116 places, 241 transitions, 2288 flow, removed 12 selfloop flow, removed 14 redundant places. [2024-11-13 14:35:33,621 INFO L231 Difference]: Finished difference. Result has 127 places, 140 transitions, 1554 flow [2024-11-13 14:35:33,622 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=20, PETRI_DIFFERENCE_MINUEND_FLOW=721, PETRI_DIFFERENCE_MINUEND_PLACES=89, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=83, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=40, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=29, PETRI_DIFFERENCE_SUBTRAHEND_STATES=28, PETRI_FLOW=1554, PETRI_PLACES=127, PETRI_TRANSITIONS=140} [2024-11-13 14:35:33,622 INFO L277 CegarLoopForPetriNet]: 21 programPoint places, 106 predicate places. [2024-11-13 14:35:33,623 INFO L471 AbstractCegarLoop]: Abstraction has has 127 places, 140 transitions, 1554 flow [2024-11-13 14:35:33,623 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 5.142857142857143) internal successors, (108), 21 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) [2024-11-13 14:35:33,623 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-13 14:35:33,624 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-13 14:35:33,644 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44d2f74b-8f25-498a-b792-4268e6d41a37/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2024-11-13 14:35:33,827 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44d2f74b-8f25-498a-b792-4268e6d41a37/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-13 14:35:33,828 INFO L396 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-11-13 14:35:33,829 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-13 14:35:33,829 INFO L85 PathProgramCache]: Analyzing trace with hash 1190531130, now seen corresponding path program 4 times [2024-11-13 14:35:33,829 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-13 14:35:33,829 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1132377925] [2024-11-13 14:35:33,829 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-13 14:35:33,829 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-13 14:35:33,848 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 14:35:34,019 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-13 14:35:34,019 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-13 14:35:34,019 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1132377925] [2024-11-13 14:35:34,019 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1132377925] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-13 14:35:34,019 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1463809814] [2024-11-13 14:35:34,020 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-11-13 14:35:34,020 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-13 14:35:34,020 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44d2f74b-8f25-498a-b792-4268e6d41a37/bin/uautomizer-verify-qhAvR1uOyd/z3 [2024-11-13 14:35:34,022 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44d2f74b-8f25-498a-b792-4268e6d41a37/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-13 14:35:34,025 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44d2f74b-8f25-498a-b792-4268e6d41a37/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2024-11-13 14:35:34,114 INFO L227 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-11-13 14:35:34,114 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-13 14:35:34,116 INFO L255 TraceCheckSpWp]: Trace formula consists of 139 conjuncts, 23 conjuncts are in the unsatisfiable core [2024-11-13 14:35:34,118 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-13 14:35:34,362 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 [2024-11-13 14:35:34,377 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-13 14:35:34,377 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-13 14:35:34,943 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-13 14:35:34,944 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 150 treesize of output 119 [2024-11-13 14:35:35,504 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-13 14:35:35,505 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1463809814] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-13 14:35:35,505 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-13 14:35:35,505 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 8, 7] total 18 [2024-11-13 14:35:35,505 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [622827840] [2024-11-13 14:35:35,505 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-13 14:35:35,505 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2024-11-13 14:35:35,506 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-13 14:35:35,506 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2024-11-13 14:35:35,506 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=246, Unknown=0, NotChecked=0, Total=306 [2024-11-13 14:35:35,506 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 20 [2024-11-13 14:35:35,506 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 127 places, 140 transitions, 1554 flow. Second operand has 18 states, 18 states have (on average 5.388888888888889) internal successors, (97), 18 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-13 14:35:35,507 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-13 14:35:35,507 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 20 [2024-11-13 14:35:35,507 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-13 14:35:37,859 INFO L124 PetriNetUnfolderBase]: 477/918 cut-off events. [2024-11-13 14:35:37,859 INFO L125 PetriNetUnfolderBase]: For 8382/8382 co-relation queries the response was YES. [2024-11-13 14:35:37,866 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5490 conditions, 918 events. 477/918 cut-off events. For 8382/8382 co-relation queries the response was YES. Maximal size of possible extension queue 83. Compared 4750 event pairs, 33 based on Foata normal form. 7/925 useless extension candidates. Maximal degree in co-relation 5296. Up to 702 conditions per place. [2024-11-13 14:35:37,873 INFO L140 encePairwiseOnDemand]: 11/20 looper letters, 120 selfloop transitions, 60 changer transitions 3/184 dead transitions. [2024-11-13 14:35:37,873 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 134 places, 184 transitions, 2260 flow [2024-11-13 14:35:37,873 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2024-11-13 14:35:37,874 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2024-11-13 14:35:37,874 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 113 transitions. [2024-11-13 14:35:37,875 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.4346153846153846 [2024-11-13 14:35:37,876 INFO L175 Difference]: Start difference. First operand has 127 places, 140 transitions, 1554 flow. Second operand 13 states and 113 transitions. [2024-11-13 14:35:37,876 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 134 places, 184 transitions, 2260 flow [2024-11-13 14:35:37,916 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 126 places, 184 transitions, 2094 flow, removed 55 selfloop flow, removed 8 redundant places. [2024-11-13 14:35:37,920 INFO L231 Difference]: Finished difference. Result has 131 places, 156 transitions, 1770 flow [2024-11-13 14:35:37,920 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=20, PETRI_DIFFERENCE_MINUEND_FLOW=1400, PETRI_DIFFERENCE_MINUEND_PLACES=114, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=140, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=44, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=80, PETRI_DIFFERENCE_SUBTRAHEND_STATES=13, PETRI_FLOW=1770, PETRI_PLACES=131, PETRI_TRANSITIONS=156} [2024-11-13 14:35:37,921 INFO L277 CegarLoopForPetriNet]: 21 programPoint places, 110 predicate places. [2024-11-13 14:35:37,921 INFO L471 AbstractCegarLoop]: Abstraction has has 131 places, 156 transitions, 1770 flow [2024-11-13 14:35:37,921 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 5.388888888888889) internal successors, (97), 18 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-13 14:35:37,921 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-13 14:35:37,921 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-13 14:35:37,947 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44d2f74b-8f25-498a-b792-4268e6d41a37/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2024-11-13 14:35:38,121 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44d2f74b-8f25-498a-b792-4268e6d41a37/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2024-11-13 14:35:38,122 INFO L396 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-11-13 14:35:38,123 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-13 14:35:38,123 INFO L85 PathProgramCache]: Analyzing trace with hash 1269179370, now seen corresponding path program 5 times [2024-11-13 14:35:38,123 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-13 14:35:38,124 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [757956686] [2024-11-13 14:35:38,124 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-13 14:35:38,124 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-13 14:35:38,149 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 14:35:38,320 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-13 14:35:38,321 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-13 14:35:38,321 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [757956686] [2024-11-13 14:35:38,321 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [757956686] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-13 14:35:38,321 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1667031744] [2024-11-13 14:35:38,321 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-11-13 14:35:38,321 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-13 14:35:38,322 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44d2f74b-8f25-498a-b792-4268e6d41a37/bin/uautomizer-verify-qhAvR1uOyd/z3 [2024-11-13 14:35:38,324 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44d2f74b-8f25-498a-b792-4268e6d41a37/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-13 14:35:38,326 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44d2f74b-8f25-498a-b792-4268e6d41a37/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2024-11-13 14:35:38,418 INFO L227 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-13 14:35:38,418 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-13 14:35:38,420 INFO L255 TraceCheckSpWp]: Trace formula consists of 139 conjuncts, 21 conjuncts are in the unsatisfiable core [2024-11-13 14:35:38,423 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-13 14:35:38,655 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 105 treesize of output 93 [2024-11-13 14:35:38,746 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-13 14:35:38,746 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-13 14:35:39,218 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-13 14:35:39,218 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 181 treesize of output 142 [2024-11-13 14:35:40,586 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-13 14:35:40,586 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1667031744] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-13 14:35:40,586 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-13 14:35:40,587 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 8, 8] total 19 [2024-11-13 14:35:40,587 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2022912848] [2024-11-13 14:35:40,587 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-13 14:35:40,587 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2024-11-13 14:35:40,587 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-13 14:35:40,588 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2024-11-13 14:35:40,588 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=273, Unknown=0, NotChecked=0, Total=342 [2024-11-13 14:35:40,588 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 20 [2024-11-13 14:35:40,588 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 131 places, 156 transitions, 1770 flow. Second operand has 19 states, 19 states have (on average 5.157894736842105) internal successors, (98), 19 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) [2024-11-13 14:35:40,589 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-13 14:35:40,589 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 20 [2024-11-13 14:35:40,589 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-13 14:35:43,422 INFO L124 PetriNetUnfolderBase]: 619/1243 cut-off events. [2024-11-13 14:35:43,422 INFO L125 PetriNetUnfolderBase]: For 11905/11905 co-relation queries the response was YES. [2024-11-13 14:35:43,430 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7326 conditions, 1243 events. 619/1243 cut-off events. For 11905/11905 co-relation queries the response was YES. Maximal size of possible extension queue 115. Compared 7279 event pairs, 52 based on Foata normal form. 8/1251 useless extension candidates. Maximal degree in co-relation 7125. Up to 431 conditions per place. [2024-11-13 14:35:43,438 INFO L140 encePairwiseOnDemand]: 10/20 looper letters, 166 selfloop transitions, 91 changer transitions 14/272 dead transitions. [2024-11-13 14:35:43,438 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 156 places, 272 transitions, 3269 flow [2024-11-13 14:35:43,438 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2024-11-13 14:35:43,438 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2024-11-13 14:35:43,439 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 221 transitions. [2024-11-13 14:35:43,440 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.425 [2024-11-13 14:35:43,440 INFO L175 Difference]: Start difference. First operand has 131 places, 156 transitions, 1770 flow. Second operand 26 states and 221 transitions. [2024-11-13 14:35:43,440 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 156 places, 272 transitions, 3269 flow [2024-11-13 14:35:43,483 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 151 places, 272 transitions, 3213 flow, removed 6 selfloop flow, removed 5 redundant places. [2024-11-13 14:35:43,488 INFO L231 Difference]: Finished difference. Result has 156 places, 182 transitions, 2314 flow [2024-11-13 14:35:43,488 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=20, PETRI_DIFFERENCE_MINUEND_FLOW=1710, PETRI_DIFFERENCE_MINUEND_PLACES=126, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=155, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=65, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=72, PETRI_DIFFERENCE_SUBTRAHEND_STATES=26, PETRI_FLOW=2314, PETRI_PLACES=156, PETRI_TRANSITIONS=182} [2024-11-13 14:35:43,489 INFO L277 CegarLoopForPetriNet]: 21 programPoint places, 135 predicate places. [2024-11-13 14:35:43,489 INFO L471 AbstractCegarLoop]: Abstraction has has 156 places, 182 transitions, 2314 flow [2024-11-13 14:35:43,489 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 5.157894736842105) internal successors, (98), 19 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) [2024-11-13 14:35:43,489 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-13 14:35:43,489 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-13 14:35:43,510 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44d2f74b-8f25-498a-b792-4268e6d41a37/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2024-11-13 14:35:43,690 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44d2f74b-8f25-498a-b792-4268e6d41a37/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-13 14:35:43,690 INFO L396 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-11-13 14:35:43,690 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-13 14:35:43,690 INFO L85 PathProgramCache]: Analyzing trace with hash 409710194, now seen corresponding path program 6 times [2024-11-13 14:35:43,690 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-13 14:35:43,690 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2086503520] [2024-11-13 14:35:43,691 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-13 14:35:43,691 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-13 14:35:43,721 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 14:35:43,888 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-13 14:35:43,889 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-13 14:35:43,889 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2086503520] [2024-11-13 14:35:43,889 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2086503520] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-13 14:35:43,889 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1158610680] [2024-11-13 14:35:43,889 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2024-11-13 14:35:43,889 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-13 14:35:43,889 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44d2f74b-8f25-498a-b792-4268e6d41a37/bin/uautomizer-verify-qhAvR1uOyd/z3 [2024-11-13 14:35:43,891 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44d2f74b-8f25-498a-b792-4268e6d41a37/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-13 14:35:43,894 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44d2f74b-8f25-498a-b792-4268e6d41a37/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2024-11-13 14:35:44,106 INFO L227 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2024-11-13 14:35:44,106 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-13 14:35:44,107 INFO L255 TraceCheckSpWp]: Trace formula consists of 139 conjuncts, 9 conjuncts are in the unsatisfiable core [2024-11-13 14:35:44,109 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-13 14:35:44,160 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-13 14:35:44,160 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-13 14:35:44,252 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-13 14:35:44,253 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1158610680] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-13 14:35:44,253 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-13 14:35:44,253 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 11 [2024-11-13 14:35:44,253 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [951940052] [2024-11-13 14:35:44,253 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-13 14:35:44,253 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-11-13 14:35:44,253 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-13 14:35:44,254 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-11-13 14:35:44,254 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=78, Unknown=0, NotChecked=0, Total=110 [2024-11-13 14:35:44,254 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 20 [2024-11-13 14:35:44,254 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 156 places, 182 transitions, 2314 flow. Second operand has 11 states, 11 states have (on average 5.0) internal successors, (55), 11 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-13 14:35:44,254 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-13 14:35:44,254 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 20 [2024-11-13 14:35:44,254 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-13 14:35:45,469 INFO L124 PetriNetUnfolderBase]: 638/1287 cut-off events. [2024-11-13 14:35:45,470 INFO L125 PetriNetUnfolderBase]: For 13934/13934 co-relation queries the response was YES. [2024-11-13 14:35:45,480 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7990 conditions, 1287 events. 638/1287 cut-off events. For 13934/13934 co-relation queries the response was YES. Maximal size of possible extension queue 120. Compared 7662 event pairs, 274 based on Foata normal form. 10/1297 useless extension candidates. Maximal degree in co-relation 7771. Up to 1097 conditions per place. [2024-11-13 14:35:45,487 INFO L140 encePairwiseOnDemand]: 14/20 looper letters, 166 selfloop transitions, 53 changer transitions 0/220 dead transitions. [2024-11-13 14:35:45,487 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 167 places, 220 transitions, 2981 flow [2024-11-13 14:35:45,488 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-11-13 14:35:45,488 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-11-13 14:35:45,489 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 100 transitions. [2024-11-13 14:35:45,489 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.4166666666666667 [2024-11-13 14:35:45,489 INFO L175 Difference]: Start difference. First operand has 156 places, 182 transitions, 2314 flow. Second operand 12 states and 100 transitions. [2024-11-13 14:35:45,489 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 167 places, 220 transitions, 2981 flow [2024-11-13 14:35:45,544 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 156 places, 220 transitions, 2874 flow, removed 11 selfloop flow, removed 11 redundant places. [2024-11-13 14:35:45,549 INFO L231 Difference]: Finished difference. Result has 160 places, 196 transitions, 2482 flow [2024-11-13 14:35:45,549 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=20, PETRI_DIFFERENCE_MINUEND_FLOW=2213, PETRI_DIFFERENCE_MINUEND_PLACES=145, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=182, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=41, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=137, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=2482, PETRI_PLACES=160, PETRI_TRANSITIONS=196} [2024-11-13 14:35:45,549 INFO L277 CegarLoopForPetriNet]: 21 programPoint places, 139 predicate places. [2024-11-13 14:35:45,550 INFO L471 AbstractCegarLoop]: Abstraction has has 160 places, 196 transitions, 2482 flow [2024-11-13 14:35:45,550 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 5.0) internal successors, (55), 11 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-13 14:35:45,550 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-13 14:35:45,550 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-13 14:35:45,568 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44d2f74b-8f25-498a-b792-4268e6d41a37/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2024-11-13 14:35:45,750 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13,8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44d2f74b-8f25-498a-b792-4268e6d41a37/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-13 14:35:45,751 INFO L396 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-11-13 14:35:45,751 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-13 14:35:45,751 INFO L85 PathProgramCache]: Analyzing trace with hash -870328672, now seen corresponding path program 7 times [2024-11-13 14:35:45,751 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-13 14:35:45,751 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1579552168] [2024-11-13 14:35:45,751 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-13 14:35:45,751 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-13 14:35:45,768 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 14:35:45,905 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-13 14:35:45,905 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-13 14:35:45,905 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1579552168] [2024-11-13 14:35:45,905 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1579552168] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-13 14:35:45,905 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2074051041] [2024-11-13 14:35:45,906 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-11-13 14:35:45,906 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-13 14:35:45,906 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44d2f74b-8f25-498a-b792-4268e6d41a37/bin/uautomizer-verify-qhAvR1uOyd/z3 [2024-11-13 14:35:45,908 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44d2f74b-8f25-498a-b792-4268e6d41a37/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-13 14:35:45,910 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44d2f74b-8f25-498a-b792-4268e6d41a37/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2024-11-13 14:35:46,001 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 14:35:46,003 INFO L255 TraceCheckSpWp]: Trace formula consists of 139 conjuncts, 31 conjuncts are in the unsatisfiable core [2024-11-13 14:35:46,005 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-13 14:35:46,037 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 [2024-11-13 14:35:46,301 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 [2024-11-13 14:35:46,317 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-13 14:35:46,317 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-13 14:35:54,553 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 [2024-11-13 14:35:54,561 INFO L349 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2024-11-13 14:35:54,561 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 [2024-11-13 14:35:54,592 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-13 14:35:54,592 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2074051041] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-13 14:35:54,592 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-13 14:35:54,592 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 9, 9] total 21 [2024-11-13 14:35:54,592 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [193073116] [2024-11-13 14:35:54,592 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-13 14:35:54,592 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2024-11-13 14:35:54,593 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-13 14:35:54,593 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2024-11-13 14:35:54,593 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=86, Invalid=334, Unknown=0, NotChecked=0, Total=420 [2024-11-13 14:35:54,593 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 20 [2024-11-13 14:35:54,594 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 160 places, 196 transitions, 2482 flow. Second operand has 21 states, 21 states have (on average 5.0476190476190474) internal successors, (106), 21 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-13 14:35:54,594 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-13 14:35:54,594 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 20 [2024-11-13 14:35:54,594 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-13 14:35:57,624 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.03s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2024-11-13 14:36:01,630 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 [] [2024-11-13 14:36:02,258 INFO L124 PetriNetUnfolderBase]: 640/1313 cut-off events. [2024-11-13 14:36:02,258 INFO L125 PetriNetUnfolderBase]: For 14986/14986 co-relation queries the response was YES. [2024-11-13 14:36:02,265 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8392 conditions, 1313 events. 640/1313 cut-off events. For 14986/14986 co-relation queries the response was YES. Maximal size of possible extension queue 125. Compared 7981 event pairs, 59 based on Foata normal form. 8/1321 useless extension candidates. Maximal degree in co-relation 8235. Up to 946 conditions per place. [2024-11-13 14:36:02,273 INFO L140 encePairwiseOnDemand]: 10/20 looper letters, 130 selfloop transitions, 105 changer transitions 6/242 dead transitions. [2024-11-13 14:36:02,273 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 178 places, 242 transitions, 3360 flow [2024-11-13 14:36:02,274 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2024-11-13 14:36:02,274 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19 states. [2024-11-13 14:36:02,274 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 149 transitions. [2024-11-13 14:36:02,275 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.39210526315789473 [2024-11-13 14:36:02,275 INFO L175 Difference]: Start difference. First operand has 160 places, 196 transitions, 2482 flow. Second operand 19 states and 149 transitions. [2024-11-13 14:36:02,275 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 178 places, 242 transitions, 3360 flow [2024-11-13 14:36:02,322 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 173 places, 242 transitions, 3267 flow, removed 26 selfloop flow, removed 5 redundant places. [2024-11-13 14:36:02,325 INFO L231 Difference]: Finished difference. Result has 178 places, 202 transitions, 2769 flow [2024-11-13 14:36:02,326 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=20, PETRI_DIFFERENCE_MINUEND_FLOW=2358, PETRI_DIFFERENCE_MINUEND_PLACES=155, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=194, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=97, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=91, PETRI_DIFFERENCE_SUBTRAHEND_STATES=19, PETRI_FLOW=2769, PETRI_PLACES=178, PETRI_TRANSITIONS=202} [2024-11-13 14:36:02,326 INFO L277 CegarLoopForPetriNet]: 21 programPoint places, 157 predicate places. [2024-11-13 14:36:02,326 INFO L471 AbstractCegarLoop]: Abstraction has has 178 places, 202 transitions, 2769 flow [2024-11-13 14:36:02,326 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 5.0476190476190474) internal successors, (106), 21 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-13 14:36:02,326 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-13 14:36:02,326 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-13 14:36:02,345 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44d2f74b-8f25-498a-b792-4268e6d41a37/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Ended with exit code 0 [2024-11-13 14:36:02,527 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44d2f74b-8f25-498a-b792-4268e6d41a37/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2024-11-13 14:36:02,527 INFO L396 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-11-13 14:36:02,527 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-13 14:36:02,528 INFO L85 PathProgramCache]: Analyzing trace with hash -791680432, now seen corresponding path program 8 times [2024-11-13 14:36:02,528 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-13 14:36:02,528 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [866795129] [2024-11-13 14:36:02,528 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-13 14:36:02,528 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-13 14:36:02,584 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 14:36:02,796 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-13 14:36:02,796 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-13 14:36:02,796 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [866795129] [2024-11-13 14:36:02,797 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [866795129] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-13 14:36:02,797 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1201145790] [2024-11-13 14:36:02,797 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-13 14:36:02,797 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-13 14:36:02,798 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44d2f74b-8f25-498a-b792-4268e6d41a37/bin/uautomizer-verify-qhAvR1uOyd/z3 [2024-11-13 14:36:02,800 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44d2f74b-8f25-498a-b792-4268e6d41a37/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-13 14:36:02,802 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44d2f74b-8f25-498a-b792-4268e6d41a37/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2024-11-13 14:36:02,902 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-13 14:36:02,902 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-13 14:36:02,904 INFO L255 TraceCheckSpWp]: Trace formula consists of 139 conjuncts, 32 conjuncts are in the unsatisfiable core [2024-11-13 14:36:02,907 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-13 14:36:02,947 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 [2024-11-13 14:36:03,197 INFO L349 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2024-11-13 14:36:03,197 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 [2024-11-13 14:36:03,337 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-13 14:36:03,337 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-13 14:36:04,469 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 [2024-11-13 14:36:04,480 INFO L349 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2024-11-13 14:36:04,480 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 [2024-11-13 14:36:04,500 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 [2024-11-13 14:36:04,564 INFO L349 Elim1Store]: treesize reduction 24, result has 60.7 percent of original size [2024-11-13 14:36:04,565 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 239 treesize of output 193 [2024-11-13 14:36:05,278 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-13 14:36:05,278 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1201145790] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-13 14:36:05,278 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-13 14:36:05,278 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 8, 8] total 19 [2024-11-13 14:36:05,278 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1965883166] [2024-11-13 14:36:05,278 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-13 14:36:05,279 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2024-11-13 14:36:05,279 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-13 14:36:05,279 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2024-11-13 14:36:05,279 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=273, Unknown=0, NotChecked=0, Total=342 [2024-11-13 14:36:05,280 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 20 [2024-11-13 14:36:05,280 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 178 places, 202 transitions, 2769 flow. Second operand has 19 states, 19 states have (on average 5.157894736842105) internal successors, (98), 19 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) [2024-11-13 14:36:05,280 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-13 14:36:05,280 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 20 [2024-11-13 14:36:05,280 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-13 14:36:08,628 INFO L124 PetriNetUnfolderBase]: 769/1569 cut-off events. [2024-11-13 14:36:08,628 INFO L125 PetriNetUnfolderBase]: For 23575/23575 co-relation queries the response was YES. [2024-11-13 14:36:08,635 INFO L83 FinitePrefix]: Finished finitePrefix Result has 10723 conditions, 1569 events. 769/1569 cut-off events. For 23575/23575 co-relation queries the response was YES. Maximal size of possible extension queue 152. Compared 9948 event pairs, 78 based on Foata normal form. 9/1578 useless extension candidates. Maximal degree in co-relation 10552. Up to 793 conditions per place. [2024-11-13 14:36:08,644 INFO L140 encePairwiseOnDemand]: 10/20 looper letters, 141 selfloop transitions, 140 changer transitions 18/300 dead transitions. [2024-11-13 14:36:08,644 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 196 places, 300 transitions, 4468 flow [2024-11-13 14:36:08,645 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2024-11-13 14:36:08,645 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23 states. [2024-11-13 14:36:08,646 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 204 transitions. [2024-11-13 14:36:08,646 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.4434782608695652 [2024-11-13 14:36:08,646 INFO L175 Difference]: Start difference. First operand has 178 places, 202 transitions, 2769 flow. Second operand 23 states and 204 transitions. [2024-11-13 14:36:08,646 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 196 places, 300 transitions, 4468 flow [2024-11-13 14:36:08,762 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 184 places, 300 transitions, 4062 flow, removed 128 selfloop flow, removed 12 redundant places. [2024-11-13 14:36:08,766 INFO L231 Difference]: Finished difference. Result has 189 places, 232 transitions, 3378 flow [2024-11-13 14:36:08,767 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=20, PETRI_DIFFERENCE_MINUEND_FLOW=2488, PETRI_DIFFERENCE_MINUEND_PLACES=162, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=201, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=114, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=72, PETRI_DIFFERENCE_SUBTRAHEND_STATES=23, PETRI_FLOW=3378, PETRI_PLACES=189, PETRI_TRANSITIONS=232} [2024-11-13 14:36:08,767 INFO L277 CegarLoopForPetriNet]: 21 programPoint places, 168 predicate places. [2024-11-13 14:36:08,767 INFO L471 AbstractCegarLoop]: Abstraction has has 189 places, 232 transitions, 3378 flow [2024-11-13 14:36:08,767 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 5.157894736842105) internal successors, (98), 19 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) [2024-11-13 14:36:08,768 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-13 14:36:08,768 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-13 14:36:08,784 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44d2f74b-8f25-498a-b792-4268e6d41a37/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Ended with exit code 0 [2024-11-13 14:36:08,968 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44d2f74b-8f25-498a-b792-4268e6d41a37/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2024-11-13 14:36:08,968 INFO L396 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-11-13 14:36:08,969 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-13 14:36:08,969 INFO L85 PathProgramCache]: Analyzing trace with hash -1669583634, now seen corresponding path program 9 times [2024-11-13 14:36:08,969 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-13 14:36:08,969 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2129351741] [2024-11-13 14:36:08,969 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-13 14:36:08,969 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-13 14:36:08,989 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 14:36:09,164 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-13 14:36:09,164 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-13 14:36:09,164 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2129351741] [2024-11-13 14:36:09,164 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2129351741] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-13 14:36:09,165 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1007940079] [2024-11-13 14:36:09,165 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-13 14:36:09,165 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-13 14:36:09,165 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44d2f74b-8f25-498a-b792-4268e6d41a37/bin/uautomizer-verify-qhAvR1uOyd/z3 [2024-11-13 14:36:09,167 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44d2f74b-8f25-498a-b792-4268e6d41a37/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-13 14:36:09,170 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44d2f74b-8f25-498a-b792-4268e6d41a37/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2024-11-13 14:36:09,301 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2024-11-13 14:36:09,302 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-13 14:36:09,303 INFO L255 TraceCheckSpWp]: Trace formula consists of 139 conjuncts, 23 conjuncts are in the unsatisfiable core [2024-11-13 14:36:09,310 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-13 14:36:09,583 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-13 14:36:09,583 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 28 treesize of output 23 [2024-11-13 14:36:09,616 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-13 14:36:09,616 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-13 14:36:09,799 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-13 14:36:09,799 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 158 treesize of output 158 [2024-11-13 14:36:10,196 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-13 14:36:10,196 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1007940079] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-13 14:36:10,196 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-13 14:36:10,196 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7, 7] total 17 [2024-11-13 14:36:10,196 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [892608533] [2024-11-13 14:36:10,196 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-13 14:36:10,197 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2024-11-13 14:36:10,197 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-13 14:36:10,198 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2024-11-13 14:36:10,198 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=215, Unknown=0, NotChecked=0, Total=272 [2024-11-13 14:36:10,198 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 20 [2024-11-13 14:36:10,198 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 189 places, 232 transitions, 3378 flow. Second operand has 17 states, 17 states have (on average 5.0588235294117645) internal successors, (86), 17 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-13 14:36:10,198 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-13 14:36:10,203 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 20 [2024-11-13 14:36:10,203 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-13 14:36:11,551 INFO L124 PetriNetUnfolderBase]: 885/1848 cut-off events. [2024-11-13 14:36:11,551 INFO L125 PetriNetUnfolderBase]: For 29512/29512 co-relation queries the response was YES. [2024-11-13 14:36:11,564 INFO L83 FinitePrefix]: Finished finitePrefix Result has 13105 conditions, 1848 events. 885/1848 cut-off events. For 29512/29512 co-relation queries the response was YES. Maximal size of possible extension queue 178. Compared 12409 event pairs, 50 based on Foata normal form. 10/1858 useless extension candidates. Maximal degree in co-relation 12913. Up to 699 conditions per place. [2024-11-13 14:36:11,576 INFO L140 encePairwiseOnDemand]: 11/20 looper letters, 169 selfloop transitions, 151 changer transitions 5/326 dead transitions. [2024-11-13 14:36:11,576 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 205 places, 326 transitions, 5180 flow [2024-11-13 14:36:11,576 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2024-11-13 14:36:11,576 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2024-11-13 14:36:11,577 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 140 transitions. [2024-11-13 14:36:11,577 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.4117647058823529 [2024-11-13 14:36:11,578 INFO L175 Difference]: Start difference. First operand has 189 places, 232 transitions, 3378 flow. Second operand 17 states and 140 transitions. [2024-11-13 14:36:11,578 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 205 places, 326 transitions, 5180 flow [2024-11-13 14:36:11,684 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 198 places, 326 transitions, 5042 flow, removed 47 selfloop flow, removed 7 redundant places. [2024-11-13 14:36:11,689 INFO L231 Difference]: Finished difference. Result has 206 places, 266 transitions, 4277 flow [2024-11-13 14:36:11,689 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=20, PETRI_DIFFERENCE_MINUEND_FLOW=3264, PETRI_DIFFERENCE_MINUEND_PLACES=182, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=232, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=123, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=90, PETRI_DIFFERENCE_SUBTRAHEND_STATES=17, PETRI_FLOW=4277, PETRI_PLACES=206, PETRI_TRANSITIONS=266} [2024-11-13 14:36:11,690 INFO L277 CegarLoopForPetriNet]: 21 programPoint places, 185 predicate places. [2024-11-13 14:36:11,690 INFO L471 AbstractCegarLoop]: Abstraction has has 206 places, 266 transitions, 4277 flow [2024-11-13 14:36:11,690 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 5.0588235294117645) internal successors, (86), 17 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-13 14:36:11,690 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-13 14:36:11,690 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-13 14:36:11,709 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44d2f74b-8f25-498a-b792-4268e6d41a37/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Ended with exit code 0 [2024-11-13 14:36:11,891 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44d2f74b-8f25-498a-b792-4268e6d41a37/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2024-11-13 14:36:11,891 INFO L396 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-11-13 14:36:11,892 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-13 14:36:11,892 INFO L85 PathProgramCache]: Analyzing trace with hash -1651149608, now seen corresponding path program 10 times [2024-11-13 14:36:11,892 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-13 14:36:11,892 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [264798286] [2024-11-13 14:36:11,892 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-13 14:36:11,892 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-13 14:36:11,929 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 14:36:12,143 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-13 14:36:12,143 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-13 14:36:12,143 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [264798286] [2024-11-13 14:36:12,143 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [264798286] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-13 14:36:12,143 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1652121226] [2024-11-13 14:36:12,143 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-11-13 14:36:12,144 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-13 14:36:12,144 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44d2f74b-8f25-498a-b792-4268e6d41a37/bin/uautomizer-verify-qhAvR1uOyd/z3 [2024-11-13 14:36:12,146 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44d2f74b-8f25-498a-b792-4268e6d41a37/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-13 14:36:12,148 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44d2f74b-8f25-498a-b792-4268e6d41a37/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2024-11-13 14:36:12,260 INFO L227 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-11-13 14:36:12,260 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-13 14:36:12,262 INFO L255 TraceCheckSpWp]: Trace formula consists of 139 conjuncts, 25 conjuncts are in the unsatisfiable core [2024-11-13 14:36:12,264 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-13 14:36:12,707 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-13 14:36:12,708 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 [2024-11-13 14:36:12,841 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-13 14:36:12,841 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-13 14:36:13,259 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-13 14:36:13,259 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 [2024-11-13 14:36:14,283 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-13 14:36:14,283 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1652121226] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-13 14:36:14,283 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-13 14:36:14,283 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 8, 7] total 18 [2024-11-13 14:36:14,283 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [618091693] [2024-11-13 14:36:14,283 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-13 14:36:14,284 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2024-11-13 14:36:14,284 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-13 14:36:14,284 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2024-11-13 14:36:14,284 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=244, Unknown=0, NotChecked=0, Total=306 [2024-11-13 14:36:14,285 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 20 [2024-11-13 14:36:14,285 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 206 places, 266 transitions, 4277 flow. Second operand has 18 states, 18 states have (on average 5.333333333333333) internal successors, (96), 18 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-13 14:36:14,285 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-13 14:36:14,285 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 20 [2024-11-13 14:36:14,285 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-13 14:36:15,545 INFO L124 PetriNetUnfolderBase]: 953/2127 cut-off events. [2024-11-13 14:36:15,545 INFO L125 PetriNetUnfolderBase]: For 37056/37056 co-relation queries the response was YES. [2024-11-13 14:36:15,557 INFO L83 FinitePrefix]: Finished finitePrefix Result has 15538 conditions, 2127 events. 953/2127 cut-off events. For 37056/37056 co-relation queries the response was YES. Maximal size of possible extension queue 219. Compared 15733 event pairs, 6 based on Foata normal form. 4/2131 useless extension candidates. Maximal degree in co-relation 15316. Up to 1237 conditions per place. [2024-11-13 14:36:15,567 INFO L140 encePairwiseOnDemand]: 12/20 looper letters, 189 selfloop transitions, 138 changer transitions 20/348 dead transitions. [2024-11-13 14:36:15,567 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 221 places, 348 transitions, 5951 flow [2024-11-13 14:36:15,568 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2024-11-13 14:36:15,568 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2024-11-13 14:36:15,569 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 124 transitions. [2024-11-13 14:36:15,569 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.3875 [2024-11-13 14:36:15,569 INFO L175 Difference]: Start difference. First operand has 206 places, 266 transitions, 4277 flow. Second operand 16 states and 124 transitions. [2024-11-13 14:36:15,569 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 221 places, 348 transitions, 5951 flow [2024-11-13 14:36:15,804 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 214 places, 348 transitions, 5513 flow, removed 88 selfloop flow, removed 7 redundant places. [2024-11-13 14:36:15,810 INFO L231 Difference]: Finished difference. Result has 216 places, 295 transitions, 4697 flow [2024-11-13 14:36:15,811 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=20, PETRI_DIFFERENCE_MINUEND_FLOW=3976, PETRI_DIFFERENCE_MINUEND_PLACES=199, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=266, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=109, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=141, PETRI_DIFFERENCE_SUBTRAHEND_STATES=16, PETRI_FLOW=4697, PETRI_PLACES=216, PETRI_TRANSITIONS=295} [2024-11-13 14:36:15,811 INFO L277 CegarLoopForPetriNet]: 21 programPoint places, 195 predicate places. [2024-11-13 14:36:15,811 INFO L471 AbstractCegarLoop]: Abstraction has has 216 places, 295 transitions, 4697 flow [2024-11-13 14:36:15,811 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 5.333333333333333) internal successors, (96), 18 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-13 14:36:15,811 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-13 14:36:15,811 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-13 14:36:15,828 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44d2f74b-8f25-498a-b792-4268e6d41a37/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Ended with exit code 0 [2024-11-13 14:36:16,012 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44d2f74b-8f25-498a-b792-4268e6d41a37/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2024-11-13 14:36:16,012 INFO L396 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-11-13 14:36:16,012 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-13 14:36:16,012 INFO L85 PathProgramCache]: Analyzing trace with hash -320870662, now seen corresponding path program 11 times [2024-11-13 14:36:16,013 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-13 14:36:16,013 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [801538391] [2024-11-13 14:36:16,013 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-13 14:36:16,013 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-13 14:36:16,033 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 14:36:16,692 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-13 14:36:16,692 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-13 14:36:16,692 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [801538391] [2024-11-13 14:36:16,692 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [801538391] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-13 14:36:16,692 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1237837834] [2024-11-13 14:36:16,693 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-11-13 14:36:16,693 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-13 14:36:16,693 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44d2f74b-8f25-498a-b792-4268e6d41a37/bin/uautomizer-verify-qhAvR1uOyd/z3 [2024-11-13 14:36:16,697 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44d2f74b-8f25-498a-b792-4268e6d41a37/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-13 14:36:16,699 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44d2f74b-8f25-498a-b792-4268e6d41a37/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2024-11-13 14:36:16,834 INFO L227 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-13 14:36:16,835 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-13 14:36:16,836 INFO L255 TraceCheckSpWp]: Trace formula consists of 145 conjuncts, 26 conjuncts are in the unsatisfiable core [2024-11-13 14:36:16,840 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-13 14:36:16,876 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 23 treesize of output 1 [2024-11-13 14:36:17,245 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-13 14:36:17,246 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-13 14:36:19,048 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 [2024-11-13 14:36:19,106 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-13 14:36:19,107 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 202 treesize of output 192 [2024-11-13 14:36:21,111 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-13 14:36:21,111 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1237837834] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-13 14:36:21,111 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-13 14:36:21,111 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8, 8] total 22 [2024-11-13 14:36:21,111 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1614176294] [2024-11-13 14:36:21,112 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-13 14:36:21,112 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2024-11-13 14:36:21,112 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-13 14:36:21,112 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2024-11-13 14:36:21,113 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=105, Invalid=401, Unknown=0, NotChecked=0, Total=506 [2024-11-13 14:36:21,113 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 20 [2024-11-13 14:36:21,113 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 216 places, 295 transitions, 4697 flow. Second operand has 23 states, 23 states have (on average 4.913043478260869) internal successors, (113), 23 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) [2024-11-13 14:36:21,113 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-13 14:36:21,113 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 20 [2024-11-13 14:36:21,113 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-13 14:36:25,352 INFO L124 PetriNetUnfolderBase]: 927/2063 cut-off events. [2024-11-13 14:36:25,352 INFO L125 PetriNetUnfolderBase]: For 40477/40477 co-relation queries the response was YES. [2024-11-13 14:36:25,365 INFO L83 FinitePrefix]: Finished finitePrefix Result has 15577 conditions, 2063 events. 927/2063 cut-off events. For 40477/40477 co-relation queries the response was YES. Maximal size of possible extension queue 216. Compared 15235 event pairs, 41 based on Foata normal form. 36/2099 useless extension candidates. Maximal degree in co-relation 15344. Up to 594 conditions per place. [2024-11-13 14:36:25,373 INFO L140 encePairwiseOnDemand]: 11/20 looper letters, 154 selfloop transitions, 41 changer transitions 251/447 dead transitions. [2024-11-13 14:36:25,373 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 246 places, 447 transitions, 7320 flow [2024-11-13 14:36:25,374 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2024-11-13 14:36:25,374 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 31 states. [2024-11-13 14:36:25,378 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 266 transitions. [2024-11-13 14:36:25,381 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.4290322580645161 [2024-11-13 14:36:25,381 INFO L175 Difference]: Start difference. First operand has 216 places, 295 transitions, 4697 flow. Second operand 31 states and 266 transitions. [2024-11-13 14:36:25,381 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 246 places, 447 transitions, 7320 flow [2024-11-13 14:36:25,743 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 232 places, 447 transitions, 7039 flow, removed 96 selfloop flow, removed 14 redundant places. [2024-11-13 14:36:25,750 INFO L231 Difference]: Finished difference. Result has 243 places, 161 transitions, 2367 flow [2024-11-13 14:36:25,751 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=20, PETRI_DIFFERENCE_MINUEND_FLOW=4534, PETRI_DIFFERENCE_MINUEND_PLACES=202, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=295, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=41, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=254, PETRI_DIFFERENCE_SUBTRAHEND_STATES=31, PETRI_FLOW=2367, PETRI_PLACES=243, PETRI_TRANSITIONS=161} [2024-11-13 14:36:25,752 INFO L277 CegarLoopForPetriNet]: 21 programPoint places, 222 predicate places. [2024-11-13 14:36:25,752 INFO L471 AbstractCegarLoop]: Abstraction has has 243 places, 161 transitions, 2367 flow [2024-11-13 14:36:25,753 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 4.913043478260869) internal successors, (113), 23 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) [2024-11-13 14:36:25,753 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-13 14:36:25,753 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-13 14:36:25,779 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44d2f74b-8f25-498a-b792-4268e6d41a37/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2024-11-13 14:36:25,957 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44d2f74b-8f25-498a-b792-4268e6d41a37/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-13 14:36:25,958 INFO L396 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-11-13 14:36:25,958 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-13 14:36:25,958 INFO L85 PathProgramCache]: Analyzing trace with hash 729396577, now seen corresponding path program 2 times [2024-11-13 14:36:25,958 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-13 14:36:25,958 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1916555200] [2024-11-13 14:36:25,958 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-13 14:36:25,959 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-13 14:36:26,001 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 14:36:26,223 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-11-13 14:36:26,224 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-13 14:36:26,224 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1916555200] [2024-11-13 14:36:26,224 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1916555200] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-13 14:36:26,224 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1691920713] [2024-11-13 14:36:26,224 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-13 14:36:26,224 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-13 14:36:26,224 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44d2f74b-8f25-498a-b792-4268e6d41a37/bin/uautomizer-verify-qhAvR1uOyd/z3 [2024-11-13 14:36:26,228 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44d2f74b-8f25-498a-b792-4268e6d41a37/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-13 14:36:26,230 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44d2f74b-8f25-498a-b792-4268e6d41a37/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2024-11-13 14:36:26,447 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-13 14:36:26,447 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-13 14:36:26,449 INFO L255 TraceCheckSpWp]: Trace formula consists of 150 conjuncts, 9 conjuncts are in the unsatisfiable core [2024-11-13 14:36:26,450 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-13 14:36:26,529 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-11-13 14:36:26,529 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-13 14:36:26,765 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-11-13 14:36:26,765 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1691920713] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-13 14:36:26,765 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-13 14:36:26,765 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 12 [2024-11-13 14:36:26,765 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1705409569] [2024-11-13 14:36:26,765 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-13 14:36:26,766 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-11-13 14:36:26,766 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-13 14:36:26,766 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-11-13 14:36:26,767 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=92, Unknown=0, NotChecked=0, Total=132 [2024-11-13 14:36:26,767 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 20 [2024-11-13 14:36:26,767 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 243 places, 161 transitions, 2367 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) [2024-11-13 14:36:26,767 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-13 14:36:26,767 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 20 [2024-11-13 14:36:26,768 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-13 14:36:28,106 INFO L124 PetriNetUnfolderBase]: 461/1029 cut-off events. [2024-11-13 14:36:28,106 INFO L125 PetriNetUnfolderBase]: For 15493/15493 co-relation queries the response was YES. [2024-11-13 14:36:28,112 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7277 conditions, 1029 events. 461/1029 cut-off events. For 15493/15493 co-relation queries the response was YES. Maximal size of possible extension queue 109. Compared 6395 event pairs, 90 based on Foata normal form. 24/1053 useless extension candidates. Maximal degree in co-relation 7154. Up to 400 conditions per place. [2024-11-13 14:36:28,118 INFO L140 encePairwiseOnDemand]: 14/20 looper letters, 159 selfloop transitions, 97 changer transitions 0/257 dead transitions. [2024-11-13 14:36:28,118 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 220 places, 257 transitions, 3873 flow [2024-11-13 14:36:28,119 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2024-11-13 14:36:28,119 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19 states. [2024-11-13 14:36:28,120 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 173 transitions. [2024-11-13 14:36:28,120 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.45526315789473687 [2024-11-13 14:36:28,120 INFO L175 Difference]: Start difference. First operand has 243 places, 161 transitions, 2367 flow. Second operand 19 states and 173 transitions. [2024-11-13 14:36:28,120 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 220 places, 257 transitions, 3873 flow [2024-11-13 14:36:28,243 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 187 places, 257 transitions, 3301 flow, removed 212 selfloop flow, removed 33 redundant places. [2024-11-13 14:36:28,250 INFO L231 Difference]: Finished difference. Result has 196 places, 196 transitions, 2809 flow [2024-11-13 14:36:28,251 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=20, PETRI_DIFFERENCE_MINUEND_FLOW=2080, PETRI_DIFFERENCE_MINUEND_PLACES=169, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=160, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=68, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=84, PETRI_DIFFERENCE_SUBTRAHEND_STATES=19, PETRI_FLOW=2809, PETRI_PLACES=196, PETRI_TRANSITIONS=196} [2024-11-13 14:36:28,251 INFO L277 CegarLoopForPetriNet]: 21 programPoint places, 175 predicate places. [2024-11-13 14:36:28,251 INFO L471 AbstractCegarLoop]: Abstraction has has 196 places, 196 transitions, 2809 flow [2024-11-13 14:36:28,252 INFO L472 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) [2024-11-13 14:36:28,252 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-13 14:36:28,252 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-13 14:36:28,278 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44d2f74b-8f25-498a-b792-4268e6d41a37/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Ended with exit code 0 [2024-11-13 14:36:28,452 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44d2f74b-8f25-498a-b792-4268e6d41a37/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-13 14:36:28,453 INFO L396 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-11-13 14:36:28,453 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-13 14:36:28,453 INFO L85 PathProgramCache]: Analyzing trace with hash 1107797269, now seen corresponding path program 3 times [2024-11-13 14:36:28,453 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-13 14:36:28,453 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1705474642] [2024-11-13 14:36:28,453 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-13 14:36:28,453 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-13 14:36:28,476 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 14:36:28,739 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-11-13 14:36:28,739 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-13 14:36:28,739 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1705474642] [2024-11-13 14:36:28,739 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1705474642] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-13 14:36:28,739 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1329334847] [2024-11-13 14:36:28,739 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-13 14:36:28,740 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-13 14:36:28,741 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44d2f74b-8f25-498a-b792-4268e6d41a37/bin/uautomizer-verify-qhAvR1uOyd/z3 [2024-11-13 14:36:28,744 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44d2f74b-8f25-498a-b792-4268e6d41a37/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-13 14:36:28,748 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44d2f74b-8f25-498a-b792-4268e6d41a37/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2024-11-13 14:36:28,930 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2024-11-13 14:36:28,931 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-13 14:36:28,932 INFO L255 TraceCheckSpWp]: Trace formula consists of 150 conjuncts, 9 conjuncts are in the unsatisfiable core [2024-11-13 14:36:28,934 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-13 14:36:29,033 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-11-13 14:36:29,034 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-13 14:36:29,167 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-11-13 14:36:29,167 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1329334847] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-13 14:36:29,167 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-13 14:36:29,167 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 13 [2024-11-13 14:36:29,167 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [155043493] [2024-11-13 14:36:29,167 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-13 14:36:29,168 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2024-11-13 14:36:29,168 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-13 14:36:29,168 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2024-11-13 14:36:29,168 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=104, Unknown=0, NotChecked=0, Total=156 [2024-11-13 14:36:29,168 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 20 [2024-11-13 14:36:29,169 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 196 places, 196 transitions, 2809 flow. Second operand has 13 states, 13 states have (on average 5.0) internal successors, (65), 13 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-13 14:36:29,169 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-13 14:36:29,169 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 20 [2024-11-13 14:36:29,169 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-13 14:36:30,709 INFO L124 PetriNetUnfolderBase]: 731/1574 cut-off events. [2024-11-13 14:36:30,709 INFO L125 PetriNetUnfolderBase]: For 17246/17246 co-relation queries the response was YES. [2024-11-13 14:36:30,716 INFO L83 FinitePrefix]: Finished finitePrefix Result has 10456 conditions, 1574 events. 731/1574 cut-off events. For 17246/17246 co-relation queries the response was YES. Maximal size of possible extension queue 145. Compared 10343 event pairs, 43 based on Foata normal form. 15/1589 useless extension candidates. Maximal degree in co-relation 10347. Up to 458 conditions per place. [2024-11-13 14:36:30,721 INFO L140 encePairwiseOnDemand]: 13/20 looper letters, 181 selfloop transitions, 166 changer transitions 0/348 dead transitions. [2024-11-13 14:36:30,721 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 216 places, 348 transitions, 5351 flow [2024-11-13 14:36:30,721 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2024-11-13 14:36:30,721 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2024-11-13 14:36:30,722 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 181 transitions. [2024-11-13 14:36:30,722 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.430952380952381 [2024-11-13 14:36:30,722 INFO L175 Difference]: Start difference. First operand has 196 places, 196 transitions, 2809 flow. Second operand 21 states and 181 transitions. [2024-11-13 14:36:30,722 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 216 places, 348 transitions, 5351 flow [2024-11-13 14:36:30,815 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 208 places, 348 transitions, 5085 flow, removed 120 selfloop flow, removed 8 redundant places. [2024-11-13 14:36:30,821 INFO L231 Difference]: Finished difference. Result has 221 places, 272 transitions, 4346 flow [2024-11-13 14:36:30,821 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=20, PETRI_DIFFERENCE_MINUEND_FLOW=2631, PETRI_DIFFERENCE_MINUEND_PLACES=188, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=196, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=103, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=76, PETRI_DIFFERENCE_SUBTRAHEND_STATES=21, PETRI_FLOW=4346, PETRI_PLACES=221, PETRI_TRANSITIONS=272} [2024-11-13 14:36:30,822 INFO L277 CegarLoopForPetriNet]: 21 programPoint places, 200 predicate places. [2024-11-13 14:36:30,822 INFO L471 AbstractCegarLoop]: Abstraction has has 221 places, 272 transitions, 4346 flow [2024-11-13 14:36:30,822 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 5.0) internal successors, (65), 13 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-13 14:36:30,822 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-13 14:36:30,822 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-13 14:36:30,842 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44d2f74b-8f25-498a-b792-4268e6d41a37/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2024-11-13 14:36:31,022 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44d2f74b-8f25-498a-b792-4268e6d41a37/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-13 14:36:31,023 INFO L396 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-11-13 14:36:31,023 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-13 14:36:31,023 INFO L85 PathProgramCache]: Analyzing trace with hash 1186445509, now seen corresponding path program 4 times [2024-11-13 14:36:31,023 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-13 14:36:31,023 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [838735542] [2024-11-13 14:36:31,023 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-13 14:36:31,023 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-13 14:36:31,056 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 14:36:31,301 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-11-13 14:36:31,301 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-13 14:36:31,301 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [838735542] [2024-11-13 14:36:31,302 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [838735542] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-13 14:36:31,302 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [444800948] [2024-11-13 14:36:31,302 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-11-13 14:36:31,302 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-13 14:36:31,302 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44d2f74b-8f25-498a-b792-4268e6d41a37/bin/uautomizer-verify-qhAvR1uOyd/z3 [2024-11-13 14:36:31,305 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44d2f74b-8f25-498a-b792-4268e6d41a37/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-13 14:36:31,308 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44d2f74b-8f25-498a-b792-4268e6d41a37/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2024-11-13 14:36:31,495 INFO L227 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-11-13 14:36:31,495 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-13 14:36:31,499 INFO L255 TraceCheckSpWp]: Trace formula consists of 150 conjuncts, 9 conjuncts are in the unsatisfiable core [2024-11-13 14:36:31,501 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-13 14:36:31,611 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-11-13 14:36:31,612 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-13 14:36:31,773 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-11-13 14:36:31,774 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [444800948] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-13 14:36:31,774 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-13 14:36:31,774 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 13 [2024-11-13 14:36:31,774 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [693564045] [2024-11-13 14:36:31,774 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-13 14:36:31,775 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2024-11-13 14:36:31,775 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-13 14:36:31,775 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2024-11-13 14:36:31,776 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=108, Unknown=0, NotChecked=0, Total=156 [2024-11-13 14:36:31,776 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 20 [2024-11-13 14:36:31,776 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 221 places, 272 transitions, 4346 flow. Second operand has 13 states, 13 states have (on average 4.846153846153846) internal successors, (63), 13 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) [2024-11-13 14:36:31,776 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-13 14:36:31,776 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 20 [2024-11-13 14:36:31,776 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-13 14:36:33,256 INFO L124 PetriNetUnfolderBase]: 725/1548 cut-off events. [2024-11-13 14:36:33,257 INFO L125 PetriNetUnfolderBase]: For 20863/20863 co-relation queries the response was YES. [2024-11-13 14:36:33,265 INFO L83 FinitePrefix]: Finished finitePrefix Result has 11279 conditions, 1548 events. 725/1548 cut-off events. For 20863/20863 co-relation queries the response was YES. Maximal size of possible extension queue 143. Compared 10016 event pairs, 45 based on Foata normal form. 16/1564 useless extension candidates. Maximal degree in co-relation 11160. Up to 422 conditions per place. [2024-11-13 14:36:33,271 INFO L140 encePairwiseOnDemand]: 13/20 looper letters, 180 selfloop transitions, 175 changer transitions 0/356 dead transitions. [2024-11-13 14:36:33,271 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 238 places, 356 transitions, 5954 flow [2024-11-13 14:36:33,271 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2024-11-13 14:36:33,271 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19 states. [2024-11-13 14:36:33,272 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 179 transitions. [2024-11-13 14:36:33,272 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.4710526315789474 [2024-11-13 14:36:33,272 INFO L175 Difference]: Start difference. First operand has 221 places, 272 transitions, 4346 flow. Second operand 19 states and 179 transitions. [2024-11-13 14:36:33,272 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 238 places, 356 transitions, 5954 flow [2024-11-13 14:36:33,415 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 234 places, 356 transitions, 5573 flow, removed 155 selfloop flow, removed 4 redundant places. [2024-11-13 14:36:33,420 INFO L231 Difference]: Finished difference. Result has 239 places, 280 transitions, 4522 flow [2024-11-13 14:36:33,421 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=20, PETRI_DIFFERENCE_MINUEND_FLOW=3972, PETRI_DIFFERENCE_MINUEND_PLACES=216, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=271, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=166, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=101, PETRI_DIFFERENCE_SUBTRAHEND_STATES=19, PETRI_FLOW=4522, PETRI_PLACES=239, PETRI_TRANSITIONS=280} [2024-11-13 14:36:33,421 INFO L277 CegarLoopForPetriNet]: 21 programPoint places, 218 predicate places. [2024-11-13 14:36:33,421 INFO L471 AbstractCegarLoop]: Abstraction has has 239 places, 280 transitions, 4522 flow [2024-11-13 14:36:33,421 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 4.846153846153846) internal successors, (63), 13 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) [2024-11-13 14:36:33,421 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-13 14:36:33,422 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-13 14:36:33,439 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44d2f74b-8f25-498a-b792-4268e6d41a37/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2024-11-13 14:36:33,622 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44d2f74b-8f25-498a-b792-4268e6d41a37/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21 [2024-11-13 14:36:33,622 INFO L396 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-11-13 14:36:33,622 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-13 14:36:33,622 INFO L85 PathProgramCache]: Analyzing trace with hash 1185850863, now seen corresponding path program 5 times [2024-11-13 14:36:33,623 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-13 14:36:33,623 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [498526836] [2024-11-13 14:36:33,623 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-13 14:36:33,623 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-13 14:36:33,646 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 14:36:33,912 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-11-13 14:36:33,912 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-13 14:36:33,912 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [498526836] [2024-11-13 14:36:33,912 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [498526836] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-13 14:36:33,912 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [164929039] [2024-11-13 14:36:33,912 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-11-13 14:36:33,913 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-13 14:36:33,913 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44d2f74b-8f25-498a-b792-4268e6d41a37/bin/uautomizer-verify-qhAvR1uOyd/z3 [2024-11-13 14:36:33,915 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44d2f74b-8f25-498a-b792-4268e6d41a37/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-13 14:36:33,918 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44d2f74b-8f25-498a-b792-4268e6d41a37/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2024-11-13 14:36:34,097 INFO L227 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-13 14:36:34,097 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-13 14:36:34,101 INFO L255 TraceCheckSpWp]: Trace formula consists of 150 conjuncts, 9 conjuncts are in the unsatisfiable core [2024-11-13 14:36:34,102 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-13 14:36:34,210 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-11-13 14:36:34,211 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-13 14:36:34,334 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-11-13 14:36:34,334 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [164929039] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-13 14:36:34,334 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-13 14:36:34,334 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 12 [2024-11-13 14:36:34,335 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1607422433] [2024-11-13 14:36:34,335 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-13 14:36:34,335 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-11-13 14:36:34,335 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-13 14:36:34,336 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-11-13 14:36:34,336 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=92, Unknown=0, NotChecked=0, Total=132 [2024-11-13 14:36:34,336 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 20 [2024-11-13 14:36:34,336 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 239 places, 280 transitions, 4522 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) [2024-11-13 14:36:34,336 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-13 14:36:34,336 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 20 [2024-11-13 14:36:34,337 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-13 14:36:35,761 INFO L124 PetriNetUnfolderBase]: 751/1636 cut-off events. [2024-11-13 14:36:35,761 INFO L125 PetriNetUnfolderBase]: For 21826/21826 co-relation queries the response was YES. [2024-11-13 14:36:35,771 INFO L83 FinitePrefix]: Finished finitePrefix Result has 11923 conditions, 1636 events. 751/1636 cut-off events. For 21826/21826 co-relation queries the response was YES. Maximal size of possible extension queue 148. Compared 10892 event pairs, 41 based on Foata normal form. 4/1640 useless extension candidates. Maximal degree in co-relation 11796. Up to 522 conditions per place. [2024-11-13 14:36:35,776 INFO L140 encePairwiseOnDemand]: 14/20 looper letters, 199 selfloop transitions, 163 changer transitions 0/363 dead transitions. [2024-11-13 14:36:35,776 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 254 places, 363 transitions, 6294 flow [2024-11-13 14:36:35,777 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2024-11-13 14:36:35,777 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2024-11-13 14:36:35,777 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 157 transitions. [2024-11-13 14:36:35,778 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.46176470588235297 [2024-11-13 14:36:35,778 INFO L175 Difference]: Start difference. First operand has 239 places, 280 transitions, 4522 flow. Second operand 17 states and 157 transitions. [2024-11-13 14:36:35,778 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 254 places, 363 transitions, 6294 flow [2024-11-13 14:36:35,921 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 243 places, 363 transitions, 6025 flow, removed 70 selfloop flow, removed 11 redundant places. [2024-11-13 14:36:35,927 INFO L231 Difference]: Finished difference. Result has 244 places, 293 transitions, 4828 flow [2024-11-13 14:36:35,927 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=20, PETRI_DIFFERENCE_MINUEND_FLOW=4249, PETRI_DIFFERENCE_MINUEND_PLACES=227, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=278, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=148, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=125, PETRI_DIFFERENCE_SUBTRAHEND_STATES=17, PETRI_FLOW=4828, PETRI_PLACES=244, PETRI_TRANSITIONS=293} [2024-11-13 14:36:35,928 INFO L277 CegarLoopForPetriNet]: 21 programPoint places, 223 predicate places. [2024-11-13 14:36:35,928 INFO L471 AbstractCegarLoop]: Abstraction has has 244 places, 293 transitions, 4828 flow [2024-11-13 14:36:35,928 INFO L472 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) [2024-11-13 14:36:35,928 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-13 14:36:35,928 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-13 14:36:35,949 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44d2f74b-8f25-498a-b792-4268e6d41a37/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Ended with exit code 0 [2024-11-13 14:36:36,132 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44d2f74b-8f25-498a-b792-4268e6d41a37/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable22 [2024-11-13 14:36:36,133 INFO L396 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-11-13 14:36:36,133 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-13 14:36:36,133 INFO L85 PathProgramCache]: Analyzing trace with hash 430022669, now seen corresponding path program 6 times [2024-11-13 14:36:36,133 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-13 14:36:36,133 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [952853030] [2024-11-13 14:36:36,133 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-13 14:36:36,133 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-13 14:36:36,149 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 14:36:36,267 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-11-13 14:36:36,268 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-13 14:36:36,268 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [952853030] [2024-11-13 14:36:36,268 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [952853030] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-13 14:36:36,268 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [816354348] [2024-11-13 14:36:36,268 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2024-11-13 14:36:36,268 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-13 14:36:36,269 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44d2f74b-8f25-498a-b792-4268e6d41a37/bin/uautomizer-verify-qhAvR1uOyd/z3 [2024-11-13 14:36:36,271 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44d2f74b-8f25-498a-b792-4268e6d41a37/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-13 14:36:36,273 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44d2f74b-8f25-498a-b792-4268e6d41a37/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2024-11-13 14:36:36,478 INFO L227 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2024-11-13 14:36:36,478 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-13 14:36:36,482 INFO L255 TraceCheckSpWp]: Trace formula consists of 150 conjuncts, 10 conjuncts are in the unsatisfiable core [2024-11-13 14:36:36,484 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-13 14:36:36,547 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-11-13 14:36:36,547 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-13 14:36:36,745 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-11-13 14:36:36,746 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [816354348] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-13 14:36:36,746 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-13 14:36:36,746 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 12 [2024-11-13 14:36:36,746 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [876275405] [2024-11-13 14:36:36,746 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-13 14:36:36,746 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-11-13 14:36:36,747 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-13 14:36:36,747 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-11-13 14:36:36,748 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=88, Unknown=0, NotChecked=0, Total=132 [2024-11-13 14:36:36,748 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 20 [2024-11-13 14:36:36,748 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 244 places, 293 transitions, 4828 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) [2024-11-13 14:36:36,748 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-13 14:36:36,748 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 20 [2024-11-13 14:36:36,749 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-13 14:36:39,495 INFO L124 PetriNetUnfolderBase]: 741/1611 cut-off events. [2024-11-13 14:36:39,495 INFO L125 PetriNetUnfolderBase]: For 22225/22225 co-relation queries the response was YES. [2024-11-13 14:36:39,506 INFO L83 FinitePrefix]: Finished finitePrefix Result has 11963 conditions, 1611 events. 741/1611 cut-off events. For 22225/22225 co-relation queries the response was YES. Maximal size of possible extension queue 145. Compared 10675 event pairs, 109 based on Foata normal form. 18/1629 useless extension candidates. Maximal degree in co-relation 11839. Up to 551 conditions per place. [2024-11-13 14:36:39,511 INFO L140 encePairwiseOnDemand]: 14/20 looper letters, 196 selfloop transitions, 144 changer transitions 0/341 dead transitions. [2024-11-13 14:36:39,511 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 259 places, 341 transitions, 6003 flow [2024-11-13 14:36:39,512 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2024-11-13 14:36:39,512 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2024-11-13 14:36:39,512 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 132 transitions. [2024-11-13 14:36:39,513 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.4125 [2024-11-13 14:36:39,513 INFO L175 Difference]: Start difference. First operand has 244 places, 293 transitions, 4828 flow. Second operand 16 states and 132 transitions. [2024-11-13 14:36:39,513 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 259 places, 341 transitions, 6003 flow [2024-11-13 14:36:39,678 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 252 places, 341 transitions, 5812 flow, removed 50 selfloop flow, removed 7 redundant places. [2024-11-13 14:36:39,684 INFO L231 Difference]: Finished difference. Result has 254 places, 303 transitions, 5130 flow [2024-11-13 14:36:39,684 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=20, PETRI_DIFFERENCE_MINUEND_FLOW=4620, PETRI_DIFFERENCE_MINUEND_PLACES=237, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=291, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=133, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=154, PETRI_DIFFERENCE_SUBTRAHEND_STATES=16, PETRI_FLOW=5130, PETRI_PLACES=254, PETRI_TRANSITIONS=303} [2024-11-13 14:36:39,685 INFO L277 CegarLoopForPetriNet]: 21 programPoint places, 233 predicate places. [2024-11-13 14:36:39,685 INFO L471 AbstractCegarLoop]: Abstraction has has 254 places, 303 transitions, 5130 flow [2024-11-13 14:36:39,685 INFO L472 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) [2024-11-13 14:36:39,685 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-13 14:36:39,685 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-13 14:36:39,703 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44d2f74b-8f25-498a-b792-4268e6d41a37/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Forceful destruction successful, exit code 0 [2024-11-13 14:36:39,885 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44d2f74b-8f25-498a-b792-4268e6d41a37/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable23 [2024-11-13 14:36:39,886 INFO L396 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-11-13 14:36:39,886 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-13 14:36:39,886 INFO L85 PathProgramCache]: Analyzing trace with hash 1981537949, now seen corresponding path program 7 times [2024-11-13 14:36:39,886 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-13 14:36:39,886 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [197125186] [2024-11-13 14:36:39,886 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-13 14:36:39,886 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-13 14:36:39,900 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 14:36:40,072 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-11-13 14:36:40,072 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-13 14:36:40,072 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [197125186] [2024-11-13 14:36:40,072 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [197125186] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-13 14:36:40,072 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [818039947] [2024-11-13 14:36:40,072 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-11-13 14:36:40,073 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-13 14:36:40,073 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44d2f74b-8f25-498a-b792-4268e6d41a37/bin/uautomizer-verify-qhAvR1uOyd/z3 [2024-11-13 14:36:40,075 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44d2f74b-8f25-498a-b792-4268e6d41a37/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-13 14:36:40,078 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44d2f74b-8f25-498a-b792-4268e6d41a37/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2024-11-13 14:36:40,245 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 14:36:40,247 INFO L255 TraceCheckSpWp]: Trace formula consists of 150 conjuncts, 9 conjuncts are in the unsatisfiable core [2024-11-13 14:36:40,248 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-13 14:36:40,318 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-11-13 14:36:40,318 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-13 14:36:40,498 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-11-13 14:36:40,499 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [818039947] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-13 14:36:40,499 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-13 14:36:40,499 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 12 [2024-11-13 14:36:40,499 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1952794170] [2024-11-13 14:36:40,499 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-13 14:36:40,499 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-11-13 14:36:40,500 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-13 14:36:40,500 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-11-13 14:36:40,500 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=92, Unknown=0, NotChecked=0, Total=132 [2024-11-13 14:36:40,500 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 20 [2024-11-13 14:36:40,500 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 254 places, 303 transitions, 5130 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) [2024-11-13 14:36:40,500 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-13 14:36:40,501 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 20 [2024-11-13 14:36:40,501 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-13 14:36:43,010 INFO L124 PetriNetUnfolderBase]: 799/1714 cut-off events. [2024-11-13 14:36:43,010 INFO L125 PetriNetUnfolderBase]: For 25368/25368 co-relation queries the response was YES. [2024-11-13 14:36:43,020 INFO L83 FinitePrefix]: Finished finitePrefix Result has 13011 conditions, 1714 events. 799/1714 cut-off events. For 25368/25368 co-relation queries the response was YES. Maximal size of possible extension queue 155. Compared 11380 event pairs, 199 based on Foata normal form. 18/1732 useless extension candidates. Maximal degree in co-relation 12885. Up to 1054 conditions per place. [2024-11-13 14:36:43,025 INFO L140 encePairwiseOnDemand]: 14/20 looper letters, 214 selfloop transitions, 150 changer transitions 0/365 dead transitions. [2024-11-13 14:36:43,025 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 270 places, 365 transitions, 6470 flow [2024-11-13 14:36:43,026 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2024-11-13 14:36:43,026 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2024-11-13 14:36:43,026 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 143 transitions. [2024-11-13 14:36:43,026 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.42058823529411765 [2024-11-13 14:36:43,026 INFO L175 Difference]: Start difference. First operand has 254 places, 303 transitions, 5130 flow. Second operand 17 states and 143 transitions. [2024-11-13 14:36:43,027 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 270 places, 365 transitions, 6470 flow [2024-11-13 14:36:43,176 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 263 places, 365 transitions, 6258 flow, removed 40 selfloop flow, removed 7 redundant places. [2024-11-13 14:36:43,182 INFO L231 Difference]: Finished difference. Result has 267 places, 323 transitions, 5720 flow [2024-11-13 14:36:43,182 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=20, PETRI_DIFFERENCE_MINUEND_FLOW=4846, PETRI_DIFFERENCE_MINUEND_PLACES=247, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=299, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=127, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=151, PETRI_DIFFERENCE_SUBTRAHEND_STATES=17, PETRI_FLOW=5720, PETRI_PLACES=267, PETRI_TRANSITIONS=323} [2024-11-13 14:36:43,182 INFO L277 CegarLoopForPetriNet]: 21 programPoint places, 246 predicate places. [2024-11-13 14:36:43,182 INFO L471 AbstractCegarLoop]: Abstraction has has 267 places, 323 transitions, 5720 flow [2024-11-13 14:36:43,183 INFO L472 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) [2024-11-13 14:36:43,183 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-13 14:36:43,183 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-13 14:36:43,198 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44d2f74b-8f25-498a-b792-4268e6d41a37/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Ended with exit code 0 [2024-11-13 14:36:43,383 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44d2f74b-8f25-498a-b792-4268e6d41a37/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable24 [2024-11-13 14:36:43,383 INFO L396 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-11-13 14:36:43,384 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-13 14:36:43,384 INFO L85 PathProgramCache]: Analyzing trace with hash -1246905236, now seen corresponding path program 1 times [2024-11-13 14:36:43,384 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-13 14:36:43,384 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1807147171] [2024-11-13 14:36:43,384 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-13 14:36:43,384 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-13 14:36:43,406 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 14:36:43,642 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-13 14:36:43,643 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-13 14:36:43,643 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1807147171] [2024-11-13 14:36:43,643 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1807147171] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-13 14:36:43,643 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2142001376] [2024-11-13 14:36:43,643 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-13 14:36:43,643 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-13 14:36:43,643 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44d2f74b-8f25-498a-b792-4268e6d41a37/bin/uautomizer-verify-qhAvR1uOyd/z3 [2024-11-13 14:36:43,646 INFO L229 MonitoredProcess]: Starting monitored process 20 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44d2f74b-8f25-498a-b792-4268e6d41a37/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-13 14:36:43,648 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44d2f74b-8f25-498a-b792-4268e6d41a37/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2024-11-13 14:36:43,781 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 14:36:43,783 INFO L255 TraceCheckSpWp]: Trace formula consists of 155 conjuncts, 33 conjuncts are in the unsatisfiable core [2024-11-13 14:36:43,786 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-13 14:36:43,837 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 [2024-11-13 14:36:44,216 INFO L173 IndexEqualityManager]: detected equality via solver [2024-11-13 14:36:44,305 INFO L349 Elim1Store]: treesize reduction 112, result has 12.5 percent of original size [2024-11-13 14:36:44,305 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 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 218 treesize of output 152 [2024-11-13 14:36:44,421 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-13 14:36:44,421 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-13 14:36:46,582 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 509 treesize of output 451 [2024-11-13 14:36:48,787 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-13 14:36:48,788 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 12 select indices, 12 select index equivalence classes, 0 disjoint index pairs (out of 66 index pairs), introduced 19 new quantified variables, introduced 66 case distinctions, treesize of input 2346 treesize of output 2026 [2024-11-13 14:40:33,203 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44d2f74b-8f25-498a-b792-4268e6d41a37/bin/uautomizer-verify-qhAvR1uOyd/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Forceful destruction successful, exit code 101 [2024-11-13 14:40:33,203 WARN L249 Executor]: External (MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44d2f74b-8f25-498a-b792-4268e6d41a37/bin/uautomizer-verify-qhAvR1uOyd/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1) with exit command (exit)) stderr output: (error "out of memory") [2024-11-13 14:40:33,205 WARN L320 FreeRefinementEngine]: Global settings require throwing the following exception [2024-11-13 14:40:33,220 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44d2f74b-8f25-498a-b792-4268e6d41a37/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Forceful destruction successful, exit code 0 [2024-11-13 14:40:33,405 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44d2f74b-8f25-498a-b792-4268e6d41a37/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable25 [2024-11-13 14:40:33,406 FATAL L? ?]: An unrecoverable error occured during an interaction with an SMT solver: de.uni_freiburg.informatik.ultimate.logic.SMTLIBException: External (MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44d2f74b-8f25-498a-b792-4268e6d41a37/bin/uautomizer-verify-qhAvR1uOyd/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1) with exit command (exit)) Received EOF on stdin. stderr output: (error "out of memory") at de.uni_freiburg.informatik.ultimate.smtsolver.external.Executor.parse(Executor.java:262) at de.uni_freiburg.informatik.ultimate.smtsolver.external.Executor.parseSuccess(Executor.java:277) at de.uni_freiburg.informatik.ultimate.smtsolver.external.Scriptor.push(Scriptor.java:133) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.arrays.DiffWrapperScript.push(DiffWrapperScript.java:90) at de.uni_freiburg.informatik.ultimate.logic.WrapperScript.push(WrapperScript.java:148) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.scripttransfer.HistoryRecordingScript.push(HistoryRecordingScript.java:107) at de.uni_freiburg.informatik.ultimate.logic.Util.checkSat(Util.java:48) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.SimplifyDDA2.checkRedundancy(SimplifyDDA2.java:275) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.SimplifyDDA2.convertForPreprocessedInputTerms(SimplifyDDA2.java:499) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.SimplifyDDA2.convert(SimplifyDDA2.java:484) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.SimplifyDDA2.convert(SimplifyDDA2.java:1) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.TermContextTransformationEngine.transform(TermContextTransformationEngine.java:88) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.TermContextTransformationEngine.transform(TermContextTransformationEngine.java:84) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.SimplifyDDA2.simplify(SimplifyDDA2.java:590) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.SmtUtils.simplify(SmtUtils.java:245) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.SmtUtils.simplifyWithStatistics(SmtUtils.java:318) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.simplify(QuantifierPusher.java:728) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPushTermWalker.convert(QuantifierPushTermWalker.java:140) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPushTermWalker.convert(QuantifierPushTermWalker.java:1) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.TermContextTransformationEngine$ApplicationTermTask.doStep(TermContextTransformationEngine.java:209) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.TermContextTransformationEngine.transform(TermContextTransformationEngine.java:100) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.TermContextTransformationEngine.transform(TermContextTransformationEngine.java:84) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPushTermWalker.eliminate(QuantifierPushTermWalker.java:297) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPushUtilsForSubsetPush.pushMinionEliminatees(QuantifierPushUtilsForSubsetPush.java:255) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPushUtilsForSubsetPush.sequentialSubsetPush(QuantifierPushUtilsForSubsetPush.java:151) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.tryToPushOverDualFiniteConnective(QuantifierPusher.java:337) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPushTermWalker.convert(QuantifierPushTermWalker.java:189) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPushTermWalker.convert(QuantifierPushTermWalker.java:1) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.TermContextTransformationEngine$ApplicationTermTask.doStep(TermContextTransformationEngine.java:209) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.TermContextTransformationEngine.transform(TermContextTransformationEngine.java:100) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.TermContextTransformationEngine.transform(TermContextTransformationEngine.java:84) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPushTermWalker.eliminate(QuantifierPushTermWalker.java:297) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPushTermWalker.eliminate(QuantifierPushTermWalker.java:283) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.PartialQuantifierElimination.eliminate(PartialQuantifierElimination.java:51) at de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.predicates.IterativePredicateTransformer$QuantifierEliminationPostprocessor.postprocess(IterativePredicateTransformer.java:234) at de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.predicates.IterativePredicateTransformer.applyPostprocessors(IterativePredicateTransformer.java:416) at de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.predicates.IterativePredicateTransformer.computeBackwardSequence(IterativePredicateTransformer.java:395) at de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.predicates.IterativePredicateTransformer.computeWeakestPreconditionSequence(IterativePredicateTransformer.java:267) at de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.singletracecheck.TraceCheckSpWp.computeInterpolantsUsingUnsatCore(TraceCheckSpWp.java:324) at de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.singletracecheck.TraceCheckSpWp.computeInterpolants(TraceCheckSpWp.java:180) at de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.singletracecheck.TraceCheckSpWp.(TraceCheckSpWp.java:159) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleSpWp.construct(IpTcStrategyModuleSpWp.java:108) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleSpWp.construct(IpTcStrategyModuleSpWp.java:1) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getOrConstruct(IpTcStrategyModuleBase.java:101) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getInterpolantComputationStatus(IpTcStrategyModuleBase.java:77) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.tryExecuteInterpolantGenerator(AutomatonFreeRefinementEngine.java:267) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.generateProof(AutomatonFreeRefinementEngine.java:148) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.executeStrategy(AutomatonFreeRefinementEngine.java:137) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.(AutomatonFreeRefinementEngine.java:85) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.TraceAbstractionRefinementEngine.(TraceAbstractionRefinementEngine.java:82) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.BasicCegarLoop.isCounterexampleFeasible(BasicCegarLoop.java:302) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.iterate(AbstractCegarLoop.java:407) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.startCegar(AbstractCegarLoop.java:342) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.runCegar(AbstractCegarLoop.java:324) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.executeCegarLoop(TraceAbstractionStarter.java:429) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseProgram(TraceAbstractionStarter.java:315) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseConcurrentProgram(TraceAbstractionStarter.java:239) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.runCegarLoops(TraceAbstractionStarter.java:168) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.(TraceAbstractionStarter.java:143) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver.finish(TraceAbstractionObserver.java:124) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runObserver(PluginConnector.java:167) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runTool(PluginConnector.java:150) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.run(PluginConnector.java:127) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.executePluginConnector(ToolchainWalker.java:233) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.processPlugin(ToolchainWalker.java:227) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walkUnprotected(ToolchainWalker.java:144) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walk(ToolchainWalker.java:106) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainManager$Toolchain.processToolchain(ToolchainManager.java:319) at de.uni_freiburg.informatik.ultimate.core.coreplugin.toolchain.DefaultToolchainJob.run(DefaultToolchainJob.java:145) at org.eclipse.core.internal.jobs.Worker.run(Worker.java:63) Caused by: de.uni_freiburg.informatik.ultimate.logic.SMTLIBException: EOF at de.uni_freiburg.informatik.ultimate.smtsolver.external.Parser$Action$.CUP$do_action(Parser.java:1518) at de.uni_freiburg.informatik.ultimate.smtsolver.external.Parser.do_action(Parser.java:701) at com.github.jhoenicke.javacup.runtime.LRParser.parse(LRParser.java:383) at de.uni_freiburg.informatik.ultimate.smtsolver.external.Executor.parse(Executor.java:258) ... 69 more [2024-11-13 14:40:33,414 INFO L158 Benchmark]: Toolchain (without parser) took 356456.03ms. Allocated memory was 117.4MB in the beginning and 1.4GB in the end (delta: 1.2GB). Free memory was 92.6MB in the beginning and 916.0MB in the end (delta: -823.4MB). Peak memory consumption was 832.4MB. Max. memory is 16.1GB. [2024-11-13 14:40:33,414 INFO L158 Benchmark]: CDTParser took 0.34ms. Allocated memory is still 117.4MB. Free memory is still 74.2MB. There was no memory consumed. Max. memory is 16.1GB. [2024-11-13 14:40:33,414 INFO L158 Benchmark]: CACSL2BoogieTranslator took 360.32ms. Allocated memory is still 117.4MB. Free memory was 92.4MB in the beginning and 80.1MB in the end (delta: 12.2MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. [2024-11-13 14:40:33,414 INFO L158 Benchmark]: Boogie Procedure Inliner took 55.06ms. Allocated memory is still 117.4MB. Free memory was 80.1MB in the beginning and 78.5MB in the end (delta: 1.6MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. [2024-11-13 14:40:33,415 INFO L158 Benchmark]: Boogie Preprocessor took 69.63ms. Allocated memory is still 117.4MB. Free memory was 78.5MB in the beginning and 76.6MB in the end (delta: 1.9MB). There was no memory consumed. Max. memory is 16.1GB. [2024-11-13 14:40:33,415 INFO L158 Benchmark]: RCFGBuilder took 880.52ms. Allocated memory is still 117.4MB. Free memory was 76.6MB in the beginning and 83.4MB in the end (delta: -6.8MB). Peak memory consumption was 46.6MB. Max. memory is 16.1GB. [2024-11-13 14:40:33,416 INFO L158 Benchmark]: TraceAbstraction took 355083.27ms. Allocated memory was 117.4MB in the beginning and 1.4GB in the end (delta: 1.2GB). Free memory was 82.8MB in the beginning and 916.0MB in the end (delta: -833.2MB). Peak memory consumption was 819.3MB. Max. memory is 16.1GB. [2024-11-13 14:40:33,417 INFO L338 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.34ms. Allocated memory is still 117.4MB. Free memory is still 74.2MB. There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 360.32ms. Allocated memory is still 117.4MB. Free memory was 92.4MB in the beginning and 80.1MB in the end (delta: 12.2MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 55.06ms. Allocated memory is still 117.4MB. Free memory was 80.1MB in the beginning and 78.5MB in the end (delta: 1.6MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. * Boogie Preprocessor took 69.63ms. Allocated memory is still 117.4MB. Free memory was 78.5MB in the beginning and 76.6MB in the end (delta: 1.9MB). There was no memory consumed. Max. memory is 16.1GB. * RCFGBuilder took 880.52ms. Allocated memory is still 117.4MB. Free memory was 76.6MB in the beginning and 83.4MB in the end (delta: -6.8MB). Peak memory consumption was 46.6MB. Max. memory is 16.1GB. * TraceAbstraction took 355083.27ms. Allocated memory was 117.4MB in the beginning and 1.4GB in the end (delta: 1.2GB). Free memory was 82.8MB in the beginning and 916.0MB in the end (delta: -833.2MB). Peak memory consumption was 819.3MB. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - ExceptionOrErrorResult: SMTLIBException: External (MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44d2f74b-8f25-498a-b792-4268e6d41a37/bin/uautomizer-verify-qhAvR1uOyd/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1) with exit command (exit)) Received EOF on stdin. stderr output: (error "out of memory") de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: SMTLIBException: External (MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44d2f74b-8f25-498a-b792-4268e6d41a37/bin/uautomizer-verify-qhAvR1uOyd/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1) with exit command (exit)) Received EOF on stdin. stderr output: (error "out of memory") : de.uni_freiburg.informatik.ultimate.smtsolver.external.Executor.parse(Executor.java:262) RESULT: Ultimate could not prove your program: Toolchain returned no result. Received shutdown request... --- End real Ultimate output --- Execution finished normally Using bit-precise analysis Retrying with bit-precise analysis ### Bit-precise run ### Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44d2f74b-8f25-498a-b792-4268e6d41a37/bin/uautomizer-verify-qhAvR1uOyd/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44d2f74b-8f25-498a-b792-4268e6d41a37/bin/uautomizer-verify-qhAvR1uOyd/plugins/org.eclipse.equinox.launcher_1.6.800.v20240513-1750.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44d2f74b-8f25-498a-b792-4268e6d41a37/bin/uautomizer-verify-qhAvR1uOyd/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44d2f74b-8f25-498a-b792-4268e6d41a37/bin/uautomizer-verify-qhAvR1uOyd/config/AutomizerReach.xml -i ../../sv-benchmarks/c/weaver/unroll-cond-3.wvr.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44d2f74b-8f25-498a-b792-4268e6d41a37/bin/uautomizer-verify-qhAvR1uOyd/config/svcomp-Reach-32bit-Automizer_Bitvector.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44d2f74b-8f25-498a-b792-4268e6d41a37/bin/uautomizer-verify-qhAvR1uOyd --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 0.3.0-dev-826ab2b [2024-11-13 14:40:36,426 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-11-13 14:40:36,570 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44d2f74b-8f25-498a-b792-4268e6d41a37/bin/uautomizer-verify-qhAvR1uOyd/config/svcomp-Reach-32bit-Automizer_Bitvector.epf [2024-11-13 14:40:36,584 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-11-13 14:40:36,585 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-11-13 14:40:36,669 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-11-13 14:40:36,669 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-11-13 14:40:36,670 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-11-13 14:40:36,670 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-11-13 14:40:36,671 INFO L153 SettingsManager]: * Use memory slicer=true [2024-11-13 14:40:36,672 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-11-13 14:40:36,673 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-11-13 14:40:36,673 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-11-13 14:40:36,674 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-11-13 14:40:36,674 INFO L153 SettingsManager]: * Use SBE=true [2024-11-13 14:40:36,674 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-11-13 14:40:36,675 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-11-13 14:40:36,675 INFO L153 SettingsManager]: * sizeof long=4 [2024-11-13 14:40:36,675 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-11-13 14:40:36,675 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-11-13 14:40:36,676 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-11-13 14:40:36,676 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-11-13 14:40:36,676 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-11-13 14:40:36,676 INFO L153 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2024-11-13 14:40:36,676 INFO L153 SettingsManager]: * Use bitvectors instead of ints=true [2024-11-13 14:40:36,676 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-11-13 14:40:36,676 INFO L153 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2024-11-13 14:40:36,677 INFO L153 SettingsManager]: * sizeof long double=12 [2024-11-13 14:40:36,677 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-11-13 14:40:36,677 INFO L153 SettingsManager]: * Use constant arrays=true [2024-11-13 14:40:36,677 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-11-13 14:40:36,678 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-11-13 14:40:36,678 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-11-13 14:40:36,678 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-11-13 14:40:36,679 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-11-13 14:40:36,679 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-11-13 14:40:36,679 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-11-13 14:40:36,680 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-11-13 14:40:36,680 INFO L153 SettingsManager]: * Trace refinement strategy=FOX [2024-11-13 14:40:36,680 INFO L153 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2024-11-13 14:40:36,681 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-11-13 14:40:36,681 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-11-13 14:40:36,681 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-11-13 14:40:36,681 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-11-13 14:40:36,681 INFO L153 SettingsManager]: * Looper check in Petri net analysis=SEMANTIC 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_44d2f74b-8f25-498a-b792-4268e6d41a37/bin/uautomizer-verify-qhAvR1uOyd 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 [2024-11-13 14:40:37,057 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-11-13 14:40:37,068 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-11-13 14:40:37,074 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-11-13 14:40:37,076 INFO L270 PluginConnector]: Initializing CDTParser... [2024-11-13 14:40:37,079 INFO L274 PluginConnector]: CDTParser initialized [2024-11-13 14:40:37,081 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44d2f74b-8f25-498a-b792-4268e6d41a37/bin/uautomizer-verify-qhAvR1uOyd/../../sv-benchmarks/c/weaver/unroll-cond-3.wvr.c Unable to find full path for "g++" [2024-11-13 14:40:39,393 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-11-13 14:40:39,779 INFO L384 CDTParser]: Found 1 translation units. [2024-11-13 14:40:39,780 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44d2f74b-8f25-498a-b792-4268e6d41a37/sv-benchmarks/c/weaver/unroll-cond-3.wvr.c [2024-11-13 14:40:39,789 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44d2f74b-8f25-498a-b792-4268e6d41a37/bin/uautomizer-verify-qhAvR1uOyd/data/c2be64ad5/fd2a3bc2e7514e53b02d584064abf3c9/FLAG3d7f3d464 [2024-11-13 14:40:39,809 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44d2f74b-8f25-498a-b792-4268e6d41a37/bin/uautomizer-verify-qhAvR1uOyd/data/c2be64ad5/fd2a3bc2e7514e53b02d584064abf3c9 [2024-11-13 14:40:39,812 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-11-13 14:40:39,814 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2024-11-13 14:40:39,816 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-11-13 14:40:39,816 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-11-13 14:40:39,822 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-11-13 14:40:39,823 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.11 02:40:39" (1/1) ... [2024-11-13 14:40:39,827 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@26905e6c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 02:40:39, skipping insertion in model container [2024-11-13 14:40:39,828 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.11 02:40:39" (1/1) ... [2024-11-13 14:40:39,849 INFO L175 MainTranslator]: Built tables and reachable declarations [2024-11-13 14:40:40,134 WARN L250 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_44d2f74b-8f25-498a-b792-4268e6d41a37/sv-benchmarks/c/weaver/unroll-cond-3.wvr.c[2667,2680] [2024-11-13 14:40:40,147 WARN L1072 CHandler]: saw a pointer cast to a type that we could not get a type size for, not adapting memory model [2024-11-13 14:40:40,154 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-13 14:40:40,176 INFO L200 MainTranslator]: Completed pre-run [2024-11-13 14:40:40,219 WARN L250 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_44d2f74b-8f25-498a-b792-4268e6d41a37/sv-benchmarks/c/weaver/unroll-cond-3.wvr.c[2667,2680] [2024-11-13 14:40:40,231 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-13 14:40:40,257 INFO L204 MainTranslator]: Completed translation [2024-11-13 14:40:40,259 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 02:40:40 WrapperNode [2024-11-13 14:40:40,259 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-11-13 14:40:40,261 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-11-13 14:40:40,261 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-11-13 14:40:40,263 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-11-13 14:40:40,272 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 02:40:40" (1/1) ... [2024-11-13 14:40:40,286 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 02:40:40" (1/1) ... [2024-11-13 14:40:40,330 INFO L138 Inliner]: procedures = 25, calls = 27, calls flagged for inlining = 13, calls inlined = 13, statements flattened = 150 [2024-11-13 14:40:40,330 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-11-13 14:40:40,331 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-11-13 14:40:40,331 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-11-13 14:40:40,332 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-11-13 14:40:40,343 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 02:40:40" (1/1) ... [2024-11-13 14:40:40,343 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 02:40:40" (1/1) ... [2024-11-13 14:40:40,353 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 02:40:40" (1/1) ... [2024-11-13 14:40:40,384 INFO L175 MemorySlicer]: Split 9 memory accesses to 2 slices as follows [2, 7]. 78 percent of accesses are in the largest equivalence class. The 2 initializations are split as follows [2, 0]. The 1 writes are split as follows [0, 1]. [2024-11-13 14:40:40,384 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 02:40:40" (1/1) ... [2024-11-13 14:40:40,384 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 02:40:40" (1/1) ... [2024-11-13 14:40:40,400 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 02:40:40" (1/1) ... [2024-11-13 14:40:40,405 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 02:40:40" (1/1) ... [2024-11-13 14:40:40,407 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 02:40:40" (1/1) ... [2024-11-13 14:40:40,411 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 02:40:40" (1/1) ... [2024-11-13 14:40:40,414 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-11-13 14:40:40,419 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-11-13 14:40:40,419 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-11-13 14:40:40,419 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-11-13 14:40:40,421 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 02:40:40" (1/1) ... [2024-11-13 14:40:40,436 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-11-13 14:40:40,455 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44d2f74b-8f25-498a-b792-4268e6d41a37/bin/uautomizer-verify-qhAvR1uOyd/z3 [2024-11-13 14:40:40,471 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44d2f74b-8f25-498a-b792-4268e6d41a37/bin/uautomizer-verify-qhAvR1uOyd/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (exit command is (exit), workingDir is null) [2024-11-13 14:40:40,475 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44d2f74b-8f25-498a-b792-4268e6d41a37/bin/uautomizer-verify-qhAvR1uOyd/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Waiting until timeout for monitored process [2024-11-13 14:40:40,511 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-11-13 14:40:40,511 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2024-11-13 14:40:40,511 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2024-11-13 14:40:40,511 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2024-11-13 14:40:40,511 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2024-11-13 14:40:40,511 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1#0 [2024-11-13 14:40:40,511 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1#1 [2024-11-13 14:40:40,511 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2024-11-13 14:40:40,511 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE4#0 [2024-11-13 14:40:40,512 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE4#1 [2024-11-13 14:40:40,512 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-11-13 14:40:40,512 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-11-13 14:40:40,512 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE4#0 [2024-11-13 14:40:40,512 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE4#1 [2024-11-13 14:40:40,514 WARN L207 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement. [2024-11-13 14:40:40,642 INFO L238 CfgBuilder]: Building ICFG [2024-11-13 14:40:40,645 INFO L264 CfgBuilder]: Building CFG for each procedure with an implementation [2024-11-13 14:40:41,185 INFO L283 CfgBuilder]: Omitted future-live optimization because the input is a concurrent program. [2024-11-13 14:40:41,185 INFO L287 CfgBuilder]: Performing block encoding [2024-11-13 14:40:41,670 INFO L311 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-11-13 14:40:41,670 INFO L316 CfgBuilder]: Removed 3 assume(true) statements. [2024-11-13 14:40:41,671 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.11 02:40:41 BoogieIcfgContainer [2024-11-13 14:40:41,672 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-11-13 14:40:41,676 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-11-13 14:40:41,676 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-11-13 14:40:41,682 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-11-13 14:40:41,683 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 13.11 02:40:39" (1/3) ... [2024-11-13 14:40:41,684 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7daff9b9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.11 02:40:41, skipping insertion in model container [2024-11-13 14:40:41,685 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 02:40:40" (2/3) ... [2024-11-13 14:40:41,685 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7daff9b9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.11 02:40:41, skipping insertion in model container [2024-11-13 14:40:41,685 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.11 02:40:41" (3/3) ... [2024-11-13 14:40:41,687 INFO L112 eAbstractionObserver]: Analyzing ICFG unroll-cond-3.wvr.c [2024-11-13 14:40:41,709 INFO L217 ceAbstractionStarter]: Automizer settings: Hoare:LoopHeads NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-11-13 14:40:41,711 INFO L154 ceAbstractionStarter]: Applying trace abstraction to ICFG unroll-cond-3.wvr.c that has 3 procedures, 18 locations, 1 initial locations, 3 loop locations, and 1 error locations. [2024-11-13 14:40:41,712 INFO L492 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2024-11-13 14:40:41,793 INFO L143 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2024-11-13 14:40:41,843 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 24 places, 20 transitions, 54 flow [2024-11-13 14:40:41,897 INFO L124 PetriNetUnfolderBase]: 3/18 cut-off events. [2024-11-13 14:40:41,903 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2024-11-13 14:40:41,908 INFO L83 FinitePrefix]: Finished finitePrefix Result has 27 conditions, 18 events. 3/18 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. 0/14 useless extension candidates. Maximal degree in co-relation 11. Up to 2 conditions per place. [2024-11-13 14:40:41,908 INFO L82 GeneralOperation]: Start removeDead. Operand has 24 places, 20 transitions, 54 flow [2024-11-13 14:40:41,912 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 21 places, 17 transitions, 46 flow [2024-11-13 14:40:41,929 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-11-13 14:40:41,948 INFO L333 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, 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;@56d14a0c, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-11-13 14:40:41,950 INFO L334 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2024-11-13 14:40:41,971 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2024-11-13 14:40:41,971 INFO L124 PetriNetUnfolderBase]: 3/16 cut-off events. [2024-11-13 14:40:41,971 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2024-11-13 14:40:41,971 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-13 14:40:41,972 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-13 14:40:41,973 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-11-13 14:40:41,977 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-13 14:40:41,978 INFO L85 PathProgramCache]: Analyzing trace with hash 1749960784, now seen corresponding path program 1 times [2024-11-13 14:40:41,988 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2024-11-13 14:40:41,988 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [994592115] [2024-11-13 14:40:41,988 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-13 14:40:41,989 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-13 14:40:41,990 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44d2f74b-8f25-498a-b792-4268e6d41a37/bin/uautomizer-verify-qhAvR1uOyd/z3 [2024-11-13 14:40:41,992 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44d2f74b-8f25-498a-b792-4268e6d41a37/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-13 14:40:41,994 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44d2f74b-8f25-498a-b792-4268e6d41a37/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2024-11-13 14:40:42,199 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 14:40:42,204 INFO L255 TraceCheckSpWp]: Trace formula consists of 70 conjuncts, 4 conjuncts are in the unsatisfiable core [2024-11-13 14:40:42,211 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-13 14:40:42,345 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-13 14:40:42,345 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-13 14:40:42,346 INFO L136 FreeRefinementEngine]: Strategy FOX found an infeasible trace [2024-11-13 14:40:42,349 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [994592115] [2024-11-13 14:40:42,349 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [994592115] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-13 14:40:42,350 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-13 14:40:42,350 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-11-13 14:40:42,352 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [584222894] [2024-11-13 14:40:42,353 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-13 14:40:42,362 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-11-13 14:40:42,370 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FOX [2024-11-13 14:40:42,404 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-11-13 14:40:42,405 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2024-11-13 14:40:42,408 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 20 [2024-11-13 14:40:42,411 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 21 places, 17 transitions, 46 flow. Second operand has 5 states, 5 states have (on average 5.6) internal successors, (28), 5 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) [2024-11-13 14:40:42,412 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-13 14:40:42,412 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 20 [2024-11-13 14:40:42,413 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-13 14:40:42,804 INFO L124 PetriNetUnfolderBase]: 65/122 cut-off events. [2024-11-13 14:40:42,805 INFO L125 PetriNetUnfolderBase]: For 17/17 co-relation queries the response was YES. [2024-11-13 14:40:42,806 INFO L83 FinitePrefix]: Finished finitePrefix Result has 267 conditions, 122 events. 65/122 cut-off events. For 17/17 co-relation queries the response was YES. Maximal size of possible extension queue 12. Compared 324 event pairs, 22 based on Foata normal form. 0/93 useless extension candidates. Maximal degree in co-relation 206. Up to 70 conditions per place. [2024-11-13 14:40:42,808 INFO L140 encePairwiseOnDemand]: 14/20 looper letters, 31 selfloop transitions, 5 changer transitions 0/37 dead transitions. [2024-11-13 14:40:42,809 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 25 places, 37 transitions, 173 flow [2024-11-13 14:40:42,812 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-11-13 14:40:42,815 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-11-13 14:40:42,824 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 52 transitions. [2024-11-13 14:40:42,829 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.52 [2024-11-13 14:40:42,831 INFO L175 Difference]: Start difference. First operand has 21 places, 17 transitions, 46 flow. Second operand 5 states and 52 transitions. [2024-11-13 14:40:42,832 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 25 places, 37 transitions, 173 flow [2024-11-13 14:40:42,838 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 21 places, 37 transitions, 155 flow, removed 0 selfloop flow, removed 4 redundant places. [2024-11-13 14:40:42,842 INFO L231 Difference]: Finished difference. Result has 24 places, 21 transitions, 74 flow [2024-11-13 14:40:42,846 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=20, PETRI_DIFFERENCE_MINUEND_FLOW=38, PETRI_DIFFERENCE_MINUEND_PLACES=17, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=17, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=12, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=74, PETRI_PLACES=24, PETRI_TRANSITIONS=21} [2024-11-13 14:40:42,853 INFO L277 CegarLoopForPetriNet]: 21 programPoint places, 3 predicate places. [2024-11-13 14:40:42,854 INFO L471 AbstractCegarLoop]: Abstraction has has 24 places, 21 transitions, 74 flow [2024-11-13 14:40:42,855 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 5.6) internal successors, (28), 5 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) [2024-11-13 14:40:42,855 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-13 14:40:42,855 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-13 14:40:42,881 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44d2f74b-8f25-498a-b792-4268e6d41a37/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2024-11-13 14:40:43,056 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44d2f74b-8f25-498a-b792-4268e6d41a37/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-13 14:40:43,056 INFO L396 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-11-13 14:40:43,057 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-13 14:40:43,057 INFO L85 PathProgramCache]: Analyzing trace with hash -205759756, now seen corresponding path program 2 times [2024-11-13 14:40:43,057 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2024-11-13 14:40:43,058 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [563312001] [2024-11-13 14:40:43,058 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-13 14:40:43,058 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-13 14:40:43,058 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44d2f74b-8f25-498a-b792-4268e6d41a37/bin/uautomizer-verify-qhAvR1uOyd/z3 [2024-11-13 14:40:43,061 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44d2f74b-8f25-498a-b792-4268e6d41a37/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-13 14:40:43,063 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44d2f74b-8f25-498a-b792-4268e6d41a37/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2024-11-13 14:40:43,190 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2024-11-13 14:40:43,191 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-13 14:40:43,193 INFO L255 TraceCheckSpWp]: Trace formula consists of 70 conjuncts, 4 conjuncts are in the unsatisfiable core [2024-11-13 14:40:43,195 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-13 14:40:43,250 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-13 14:40:43,251 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-13 14:40:43,251 INFO L136 FreeRefinementEngine]: Strategy FOX found an infeasible trace [2024-11-13 14:40:43,251 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [563312001] [2024-11-13 14:40:43,251 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [563312001] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-13 14:40:43,251 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-13 14:40:43,252 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-11-13 14:40:43,252 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1289397253] [2024-11-13 14:40:43,252 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-13 14:40:43,253 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-11-13 14:40:43,254 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FOX [2024-11-13 14:40:43,254 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-11-13 14:40:43,254 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2024-11-13 14:40:43,255 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 20 [2024-11-13 14:40:43,255 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 24 places, 21 transitions, 74 flow. Second operand has 5 states, 5 states have (on average 5.6) internal successors, (28), 5 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) [2024-11-13 14:40:43,255 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-13 14:40:43,255 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 20 [2024-11-13 14:40:43,255 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-13 14:40:43,601 INFO L124 PetriNetUnfolderBase]: 100/189 cut-off events. [2024-11-13 14:40:43,601 INFO L125 PetriNetUnfolderBase]: For 111/111 co-relation queries the response was YES. [2024-11-13 14:40:43,605 INFO L83 FinitePrefix]: Finished finitePrefix Result has 543 conditions, 189 events. 100/189 cut-off events. For 111/111 co-relation queries the response was YES. Maximal size of possible extension queue 18. Compared 594 event pairs, 39 based on Foata normal form. 2/154 useless extension candidates. Maximal degree in co-relation 191. Up to 119 conditions per place. [2024-11-13 14:40:43,608 INFO L140 encePairwiseOnDemand]: 14/20 looper letters, 33 selfloop transitions, 7 changer transitions 0/41 dead transitions. [2024-11-13 14:40:43,608 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 28 places, 41 transitions, 232 flow [2024-11-13 14:40:43,610 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-11-13 14:40:43,610 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-11-13 14:40:43,611 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 48 transitions. [2024-11-13 14:40:43,612 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.48 [2024-11-13 14:40:43,612 INFO L175 Difference]: Start difference. First operand has 24 places, 21 transitions, 74 flow. Second operand 5 states and 48 transitions. [2024-11-13 14:40:43,613 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 28 places, 41 transitions, 232 flow [2024-11-13 14:40:43,617 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 27 places, 41 transitions, 215 flow, removed 5 selfloop flow, removed 1 redundant places. [2024-11-13 14:40:43,618 INFO L231 Difference]: Finished difference. Result has 30 places, 25 transitions, 116 flow [2024-11-13 14:40:43,620 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=20, PETRI_DIFFERENCE_MINUEND_FLOW=68, PETRI_DIFFERENCE_MINUEND_PLACES=23, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=21, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=14, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=116, PETRI_PLACES=30, PETRI_TRANSITIONS=25} [2024-11-13 14:40:43,621 INFO L277 CegarLoopForPetriNet]: 21 programPoint places, 9 predicate places. [2024-11-13 14:40:43,622 INFO L471 AbstractCegarLoop]: Abstraction has has 30 places, 25 transitions, 116 flow [2024-11-13 14:40:43,622 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 5.6) internal successors, (28), 5 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) [2024-11-13 14:40:43,622 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-13 14:40:43,623 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-13 14:40:43,648 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44d2f74b-8f25-498a-b792-4268e6d41a37/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2024-11-13 14:40:43,826 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44d2f74b-8f25-498a-b792-4268e6d41a37/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-13 14:40:43,827 INFO L396 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-11-13 14:40:43,827 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-13 14:40:43,828 INFO L85 PathProgramCache]: Analyzing trace with hash 1892527052, now seen corresponding path program 3 times [2024-11-13 14:40:43,828 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2024-11-13 14:40:43,828 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [387902391] [2024-11-13 14:40:43,829 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-13 14:40:43,829 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-13 14:40:43,829 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44d2f74b-8f25-498a-b792-4268e6d41a37/bin/uautomizer-verify-qhAvR1uOyd/z3 [2024-11-13 14:40:43,831 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44d2f74b-8f25-498a-b792-4268e6d41a37/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-13 14:40:43,833 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44d2f74b-8f25-498a-b792-4268e6d41a37/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2024-11-13 14:40:43,944 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 1 check-sat command(s) [2024-11-13 14:40:43,944 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-13 14:40:43,947 INFO L255 TraceCheckSpWp]: Trace formula consists of 70 conjuncts, 4 conjuncts are in the unsatisfiable core [2024-11-13 14:40:43,948 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-13 14:40:44,058 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-13 14:40:44,058 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-13 14:40:44,059 INFO L136 FreeRefinementEngine]: Strategy FOX found an infeasible trace [2024-11-13 14:40:44,059 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [387902391] [2024-11-13 14:40:44,059 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [387902391] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-13 14:40:44,059 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-13 14:40:44,059 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-11-13 14:40:44,059 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1370070647] [2024-11-13 14:40:44,060 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-13 14:40:44,060 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-11-13 14:40:44,060 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FOX [2024-11-13 14:40:44,061 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-11-13 14:40:44,061 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2024-11-13 14:40:44,061 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 20 [2024-11-13 14:40:44,061 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 30 places, 25 transitions, 116 flow. Second operand has 5 states, 5 states have (on average 5.6) internal successors, (28), 5 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) [2024-11-13 14:40:44,062 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-13 14:40:44,062 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 20 [2024-11-13 14:40:44,062 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-13 14:40:44,422 INFO L124 PetriNetUnfolderBase]: 109/203 cut-off events. [2024-11-13 14:40:44,423 INFO L125 PetriNetUnfolderBase]: For 284/284 co-relation queries the response was YES. [2024-11-13 14:40:44,425 INFO L83 FinitePrefix]: Finished finitePrefix Result has 704 conditions, 203 events. 109/203 cut-off events. For 284/284 co-relation queries the response was YES. Maximal size of possible extension queue 20. Compared 654 event pairs, 39 based on Foata normal form. 3/181 useless extension candidates. Maximal degree in co-relation 228. Up to 110 conditions per place. [2024-11-13 14:40:44,431 INFO L140 encePairwiseOnDemand]: 14/20 looper letters, 32 selfloop transitions, 12 changer transitions 0/45 dead transitions. [2024-11-13 14:40:44,432 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 34 places, 45 transitions, 297 flow [2024-11-13 14:40:44,433 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-11-13 14:40:44,433 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-11-13 14:40:44,434 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 52 transitions. [2024-11-13 14:40:44,435 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.52 [2024-11-13 14:40:44,435 INFO L175 Difference]: Start difference. First operand has 30 places, 25 transitions, 116 flow. Second operand 5 states and 52 transitions. [2024-11-13 14:40:44,436 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 34 places, 45 transitions, 297 flow [2024-11-13 14:40:44,440 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 33 places, 45 transitions, 273 flow, removed 8 selfloop flow, removed 1 redundant places. [2024-11-13 14:40:44,445 INFO L231 Difference]: Finished difference. Result has 36 places, 31 transitions, 195 flow [2024-11-13 14:40:44,446 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=20, PETRI_DIFFERENCE_MINUEND_FLOW=106, PETRI_DIFFERENCE_MINUEND_PLACES=29, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=25, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=15, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=195, PETRI_PLACES=36, PETRI_TRANSITIONS=31} [2024-11-13 14:40:44,447 INFO L277 CegarLoopForPetriNet]: 21 programPoint places, 15 predicate places. [2024-11-13 14:40:44,447 INFO L471 AbstractCegarLoop]: Abstraction has has 36 places, 31 transitions, 195 flow [2024-11-13 14:40:44,449 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 5.6) internal successors, (28), 5 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) [2024-11-13 14:40:44,450 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-13 14:40:44,450 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-13 14:40:44,475 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44d2f74b-8f25-498a-b792-4268e6d41a37/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2024-11-13 14:40:44,650 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44d2f74b-8f25-498a-b792-4268e6d41a37/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-13 14:40:44,651 INFO L396 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-11-13 14:40:44,651 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-13 14:40:44,651 INFO L85 PathProgramCache]: Analyzing trace with hash -288282000, now seen corresponding path program 4 times [2024-11-13 14:40:44,652 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2024-11-13 14:40:44,652 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1384545133] [2024-11-13 14:40:44,652 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-11-13 14:40:44,652 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-13 14:40:44,652 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44d2f74b-8f25-498a-b792-4268e6d41a37/bin/uautomizer-verify-qhAvR1uOyd/z3 [2024-11-13 14:40:44,655 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44d2f74b-8f25-498a-b792-4268e6d41a37/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-13 14:40:44,657 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44d2f74b-8f25-498a-b792-4268e6d41a37/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2024-11-13 14:40:44,769 INFO L227 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-11-13 14:40:44,769 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-13 14:40:44,772 INFO L255 TraceCheckSpWp]: Trace formula consists of 70 conjuncts, 4 conjuncts are in the unsatisfiable core [2024-11-13 14:40:44,774 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-13 14:40:44,842 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-13 14:40:44,845 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-13 14:40:44,845 INFO L136 FreeRefinementEngine]: Strategy FOX found an infeasible trace [2024-11-13 14:40:44,846 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1384545133] [2024-11-13 14:40:44,846 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1384545133] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-13 14:40:44,846 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-13 14:40:44,846 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-11-13 14:40:44,846 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1143841919] [2024-11-13 14:40:44,846 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-13 14:40:44,847 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-11-13 14:40:44,847 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FOX [2024-11-13 14:40:44,847 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-11-13 14:40:44,848 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2024-11-13 14:40:44,848 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 20 [2024-11-13 14:40:44,848 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 36 places, 31 transitions, 195 flow. Second operand has 5 states, 5 states have (on average 5.6) internal successors, (28), 5 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) [2024-11-13 14:40:44,848 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-13 14:40:44,848 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 20 [2024-11-13 14:40:44,848 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-13 14:40:45,131 INFO L124 PetriNetUnfolderBase]: 106/200 cut-off events. [2024-11-13 14:40:45,132 INFO L125 PetriNetUnfolderBase]: For 488/488 co-relation queries the response was YES. [2024-11-13 14:40:45,135 INFO L83 FinitePrefix]: Finished finitePrefix Result has 770 conditions, 200 events. 106/200 cut-off events. For 488/488 co-relation queries the response was YES. Maximal size of possible extension queue 20. Compared 655 event pairs, 46 based on Foata normal form. 3/178 useless extension candidates. Maximal degree in co-relation 353. Up to 159 conditions per place. [2024-11-13 14:40:45,140 INFO L140 encePairwiseOnDemand]: 14/20 looper letters, 28 selfloop transitions, 15 changer transitions 0/44 dead transitions. [2024-11-13 14:40:45,140 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 40 places, 44 transitions, 355 flow [2024-11-13 14:40:45,144 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-11-13 14:40:45,145 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-11-13 14:40:45,145 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 47 transitions. [2024-11-13 14:40:45,147 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.47 [2024-11-13 14:40:45,147 INFO L175 Difference]: Start difference. First operand has 36 places, 31 transitions, 195 flow. Second operand 5 states and 47 transitions. [2024-11-13 14:40:45,147 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 40 places, 44 transitions, 355 flow [2024-11-13 14:40:45,154 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 39 places, 44 transitions, 342 flow, removed 3 selfloop flow, removed 1 redundant places. [2024-11-13 14:40:45,158 INFO L231 Difference]: Finished difference. Result has 41 places, 37 transitions, 288 flow [2024-11-13 14:40:45,158 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=20, PETRI_DIFFERENCE_MINUEND_FLOW=184, PETRI_DIFFERENCE_MINUEND_PLACES=35, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=31, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=9, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=19, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=288, PETRI_PLACES=41, PETRI_TRANSITIONS=37} [2024-11-13 14:40:45,159 INFO L277 CegarLoopForPetriNet]: 21 programPoint places, 20 predicate places. [2024-11-13 14:40:45,161 INFO L471 AbstractCegarLoop]: Abstraction has has 41 places, 37 transitions, 288 flow [2024-11-13 14:40:45,161 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 5.6) internal successors, (28), 5 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) [2024-11-13 14:40:45,161 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-13 14:40:45,161 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-13 14:40:45,186 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44d2f74b-8f25-498a-b792-4268e6d41a37/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2024-11-13 14:40:45,362 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44d2f74b-8f25-498a-b792-4268e6d41a37/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-13 14:40:45,362 INFO L396 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-11-13 14:40:45,363 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-13 14:40:45,363 INFO L85 PathProgramCache]: Analyzing trace with hash 1971175292, now seen corresponding path program 5 times [2024-11-13 14:40:45,363 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2024-11-13 14:40:45,363 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1500168363] [2024-11-13 14:40:45,363 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-11-13 14:40:45,364 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-13 14:40:45,364 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44d2f74b-8f25-498a-b792-4268e6d41a37/bin/uautomizer-verify-qhAvR1uOyd/z3 [2024-11-13 14:40:45,366 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44d2f74b-8f25-498a-b792-4268e6d41a37/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-13 14:40:45,367 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44d2f74b-8f25-498a-b792-4268e6d41a37/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2024-11-13 14:40:45,465 INFO L227 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2024-11-13 14:40:45,465 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-13 14:40:45,471 INFO L255 TraceCheckSpWp]: Trace formula consists of 70 conjuncts, 4 conjuncts are in the unsatisfiable core [2024-11-13 14:40:45,473 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-13 14:40:45,539 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-13 14:40:45,540 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-13 14:40:45,540 INFO L136 FreeRefinementEngine]: Strategy FOX found an infeasible trace [2024-11-13 14:40:45,540 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1500168363] [2024-11-13 14:40:45,540 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1500168363] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-13 14:40:45,540 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-13 14:40:45,541 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-11-13 14:40:45,541 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [138630813] [2024-11-13 14:40:45,541 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-13 14:40:45,541 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-11-13 14:40:45,542 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FOX [2024-11-13 14:40:45,542 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-11-13 14:40:45,542 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2024-11-13 14:40:45,543 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 20 [2024-11-13 14:40:45,543 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 41 places, 37 transitions, 288 flow. Second operand has 5 states, 5 states have (on average 5.6) internal successors, (28), 5 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) [2024-11-13 14:40:45,543 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-13 14:40:45,543 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 20 [2024-11-13 14:40:45,543 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-13 14:40:45,817 INFO L124 PetriNetUnfolderBase]: 107/203 cut-off events. [2024-11-13 14:40:45,818 INFO L125 PetriNetUnfolderBase]: For 641/641 co-relation queries the response was YES. [2024-11-13 14:40:45,821 INFO L83 FinitePrefix]: Finished finitePrefix Result has 872 conditions, 203 events. 107/203 cut-off events. For 641/641 co-relation queries the response was YES. Maximal size of possible extension queue 21. Compared 665 event pairs, 34 based on Foata normal form. 2/180 useless extension candidates. Maximal degree in co-relation 372. Up to 112 conditions per place. [2024-11-13 14:40:45,824 INFO L140 encePairwiseOnDemand]: 14/20 looper letters, 34 selfloop transitions, 14 changer transitions 0/49 dead transitions. [2024-11-13 14:40:45,825 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 45 places, 49 transitions, 422 flow [2024-11-13 14:40:45,826 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-11-13 14:40:45,826 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-11-13 14:40:45,827 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 51 transitions. [2024-11-13 14:40:45,827 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.51 [2024-11-13 14:40:45,827 INFO L175 Difference]: Start difference. First operand has 41 places, 37 transitions, 288 flow. Second operand 5 states and 51 transitions. [2024-11-13 14:40:45,827 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 45 places, 49 transitions, 422 flow [2024-11-13 14:40:45,837 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 43 places, 49 transitions, 368 flow, removed 15 selfloop flow, removed 2 redundant places. [2024-11-13 14:40:45,842 INFO L231 Difference]: Finished difference. Result has 44 places, 38 transitions, 274 flow [2024-11-13 14:40:45,842 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=20, PETRI_DIFFERENCE_MINUEND_FLOW=234, PETRI_DIFFERENCE_MINUEND_PLACES=39, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=37, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=13, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=24, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=274, PETRI_PLACES=44, PETRI_TRANSITIONS=38} [2024-11-13 14:40:45,843 INFO L277 CegarLoopForPetriNet]: 21 programPoint places, 23 predicate places. [2024-11-13 14:40:45,846 INFO L471 AbstractCegarLoop]: Abstraction has has 44 places, 38 transitions, 274 flow [2024-11-13 14:40:45,846 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 5.6) internal successors, (28), 5 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) [2024-11-13 14:40:45,846 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-13 14:40:45,847 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-13 14:40:45,871 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44d2f74b-8f25-498a-b792-4268e6d41a37/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2024-11-13 14:40:46,047 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44d2f74b-8f25-498a-b792-4268e6d41a37/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-13 14:40:46,048 INFO L396 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-11-13 14:40:46,049 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-13 14:40:46,049 INFO L85 PathProgramCache]: Analyzing trace with hash -205165110, now seen corresponding path program 6 times [2024-11-13 14:40:46,049 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2024-11-13 14:40:46,049 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [128168102] [2024-11-13 14:40:46,050 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2024-11-13 14:40:46,050 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-13 14:40:46,050 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44d2f74b-8f25-498a-b792-4268e6d41a37/bin/uautomizer-verify-qhAvR1uOyd/z3 [2024-11-13 14:40:46,052 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44d2f74b-8f25-498a-b792-4268e6d41a37/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-13 14:40:46,055 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44d2f74b-8f25-498a-b792-4268e6d41a37/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2024-11-13 14:40:46,164 INFO L227 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 1 check-sat command(s) [2024-11-13 14:40:46,165 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-13 14:40:46,167 INFO L255 TraceCheckSpWp]: Trace formula consists of 70 conjuncts, 4 conjuncts are in the unsatisfiable core [2024-11-13 14:40:46,168 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-13 14:40:46,240 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-13 14:40:46,240 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-13 14:40:46,241 INFO L136 FreeRefinementEngine]: Strategy FOX found an infeasible trace [2024-11-13 14:40:46,241 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [128168102] [2024-11-13 14:40:46,241 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [128168102] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-13 14:40:46,241 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-13 14:40:46,241 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-11-13 14:40:46,241 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [179825927] [2024-11-13 14:40:46,241 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-13 14:40:46,241 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-11-13 14:40:46,242 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FOX [2024-11-13 14:40:46,242 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-11-13 14:40:46,242 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2024-11-13 14:40:46,242 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 20 [2024-11-13 14:40:46,243 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 44 places, 38 transitions, 274 flow. Second operand has 5 states, 5 states have (on average 5.6) internal successors, (28), 5 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) [2024-11-13 14:40:46,243 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-13 14:40:46,243 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 20 [2024-11-13 14:40:46,243 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-13 14:40:46,506 INFO L124 PetriNetUnfolderBase]: 106/196 cut-off events. [2024-11-13 14:40:46,506 INFO L125 PetriNetUnfolderBase]: For 655/655 co-relation queries the response was YES. [2024-11-13 14:40:46,507 INFO L83 FinitePrefix]: Finished finitePrefix Result has 819 conditions, 196 events. 106/196 cut-off events. For 655/655 co-relation queries the response was YES. Maximal size of possible extension queue 21. Compared 612 event pairs, 45 based on Foata normal form. 2/173 useless extension candidates. Maximal degree in co-relation 704. Up to 153 conditions per place. [2024-11-13 14:40:46,509 INFO L140 encePairwiseOnDemand]: 14/20 looper letters, 30 selfloop transitions, 15 changer transitions 0/46 dead transitions. [2024-11-13 14:40:46,510 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 48 places, 46 transitions, 394 flow [2024-11-13 14:40:46,510 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-11-13 14:40:46,510 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-11-13 14:40:46,511 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 47 transitions. [2024-11-13 14:40:46,511 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.47 [2024-11-13 14:40:46,512 INFO L175 Difference]: Start difference. First operand has 44 places, 38 transitions, 274 flow. Second operand 5 states and 47 transitions. [2024-11-13 14:40:46,512 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 48 places, 46 transitions, 394 flow [2024-11-13 14:40:46,516 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 45 places, 46 transitions, 360 flow, removed 2 selfloop flow, removed 3 redundant places. [2024-11-13 14:40:46,518 INFO L231 Difference]: Finished difference. Result has 46 places, 39 transitions, 286 flow [2024-11-13 14:40:46,518 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=20, PETRI_DIFFERENCE_MINUEND_FLOW=242, PETRI_DIFFERENCE_MINUEND_PLACES=41, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=38, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=14, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=23, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=286, PETRI_PLACES=46, PETRI_TRANSITIONS=39} [2024-11-13 14:40:46,519 INFO L277 CegarLoopForPetriNet]: 21 programPoint places, 25 predicate places. [2024-11-13 14:40:46,519 INFO L471 AbstractCegarLoop]: Abstraction has has 46 places, 39 transitions, 286 flow [2024-11-13 14:40:46,519 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 5.6) internal successors, (28), 5 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) [2024-11-13 14:40:46,520 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-13 14:40:46,520 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-13 14:40:46,539 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44d2f74b-8f25-498a-b792-4268e6d41a37/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2024-11-13 14:40:46,720 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44d2f74b-8f25-498a-b792-4268e6d41a37/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-13 14:40:46,721 INFO L396 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-11-13 14:40:46,721 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-13 14:40:46,721 INFO L85 PathProgramCache]: Analyzing trace with hash -1528714547, now seen corresponding path program 1 times [2024-11-13 14:40:46,722 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2024-11-13 14:40:46,722 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [416458098] [2024-11-13 14:40:46,722 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-13 14:40:46,722 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-13 14:40:46,722 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44d2f74b-8f25-498a-b792-4268e6d41a37/bin/uautomizer-verify-qhAvR1uOyd/z3 [2024-11-13 14:40:46,725 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44d2f74b-8f25-498a-b792-4268e6d41a37/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-13 14:40:46,726 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44d2f74b-8f25-498a-b792-4268e6d41a37/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2024-11-13 14:40:46,837 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 14:40:46,842 INFO L255 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 5 conjuncts are in the unsatisfiable core [2024-11-13 14:40:46,844 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-13 14:40:46,933 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-13 14:40:46,933 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-13 14:40:47,112 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-13 14:40:47,113 INFO L136 FreeRefinementEngine]: Strategy FOX found an infeasible trace [2024-11-13 14:40:47,113 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [416458098] [2024-11-13 14:40:47,113 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [416458098] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-13 14:40:47,113 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-11-13 14:40:47,113 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 10 [2024-11-13 14:40:47,113 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [317879475] [2024-11-13 14:40:47,114 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-11-13 14:40:47,114 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-11-13 14:40:47,114 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FOX [2024-11-13 14:40:47,115 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-11-13 14:40:47,115 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2024-11-13 14:40:47,115 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 20 [2024-11-13 14:40:47,116 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 46 places, 39 transitions, 286 flow. Second operand has 10 states, 10 states have (on average 5.0) internal successors, (50), 10 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-13 14:40:47,116 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-13 14:40:47,116 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 20 [2024-11-13 14:40:47,116 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-13 14:40:48,563 INFO L124 PetriNetUnfolderBase]: 289/505 cut-off events. [2024-11-13 14:40:48,564 INFO L125 PetriNetUnfolderBase]: For 1254/1254 co-relation queries the response was YES. [2024-11-13 14:40:48,566 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1864 conditions, 505 events. 289/505 cut-off events. For 1254/1254 co-relation queries the response was YES. Maximal size of possible extension queue 39. Compared 2050 event pairs, 32 based on Foata normal form. 0/399 useless extension candidates. Maximal degree in co-relation 1515. Up to 207 conditions per place. [2024-11-13 14:40:48,569 INFO L140 encePairwiseOnDemand]: 14/20 looper letters, 66 selfloop transitions, 53 changer transitions 0/120 dead transitions. [2024-11-13 14:40:48,570 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 61 places, 120 transitions, 943 flow [2024-11-13 14:40:48,570 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2024-11-13 14:40:48,571 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2024-11-13 14:40:48,572 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 145 transitions. [2024-11-13 14:40:48,572 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.453125 [2024-11-13 14:40:48,572 INFO L175 Difference]: Start difference. First operand has 46 places, 39 transitions, 286 flow. Second operand 16 states and 145 transitions. [2024-11-13 14:40:48,572 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 61 places, 120 transitions, 943 flow [2024-11-13 14:40:48,578 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 58 places, 120 transitions, 911 flow, removed 2 selfloop flow, removed 3 redundant places. [2024-11-13 14:40:48,580 INFO L231 Difference]: Finished difference. Result has 62 places, 74 transitions, 663 flow [2024-11-13 14:40:48,581 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=20, PETRI_DIFFERENCE_MINUEND_FLOW=254, PETRI_DIFFERENCE_MINUEND_PLACES=43, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=39, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=21, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=14, PETRI_DIFFERENCE_SUBTRAHEND_STATES=16, PETRI_FLOW=663, PETRI_PLACES=62, PETRI_TRANSITIONS=74} [2024-11-13 14:40:48,582 INFO L277 CegarLoopForPetriNet]: 21 programPoint places, 41 predicate places. [2024-11-13 14:40:48,582 INFO L471 AbstractCegarLoop]: Abstraction has has 62 places, 74 transitions, 663 flow [2024-11-13 14:40:48,582 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 5.0) internal successors, (50), 10 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-13 14:40:48,582 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-13 14:40:48,583 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-13 14:40:48,608 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44d2f74b-8f25-498a-b792-4268e6d41a37/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2024-11-13 14:40:48,786 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44d2f74b-8f25-498a-b792-4268e6d41a37/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-13 14:40:48,787 INFO L396 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-11-13 14:40:48,789 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-13 14:40:48,789 INFO L85 PathProgramCache]: Analyzing trace with hash 1182037460, now seen corresponding path program 1 times [2024-11-13 14:40:48,789 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2024-11-13 14:40:48,789 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [993635208] [2024-11-13 14:40:48,790 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-13 14:40:48,790 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-13 14:40:48,790 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44d2f74b-8f25-498a-b792-4268e6d41a37/bin/uautomizer-verify-qhAvR1uOyd/z3 [2024-11-13 14:40:48,792 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44d2f74b-8f25-498a-b792-4268e6d41a37/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-13 14:40:48,795 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44d2f74b-8f25-498a-b792-4268e6d41a37/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2024-11-13 14:40:48,895 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 14:40:48,900 INFO L255 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 7 conjuncts are in the unsatisfiable core [2024-11-13 14:40:48,901 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-13 14:40:48,936 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-13 14:40:48,936 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-13 14:40:48,936 INFO L136 FreeRefinementEngine]: Strategy FOX found an infeasible trace [2024-11-13 14:40:48,937 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [993635208] [2024-11-13 14:40:48,937 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [993635208] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-13 14:40:48,937 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-13 14:40:48,937 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-11-13 14:40:48,937 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [608622193] [2024-11-13 14:40:48,937 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-13 14:40:48,938 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-13 14:40:48,938 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FOX [2024-11-13 14:40:48,938 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-13 14:40:48,938 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-13 14:40:48,938 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 20 [2024-11-13 14:40:48,939 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 62 places, 74 transitions, 663 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) [2024-11-13 14:40:48,939 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-13 14:40:48,939 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 20 [2024-11-13 14:40:48,939 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-13 14:40:49,139 INFO L124 PetriNetUnfolderBase]: 289/506 cut-off events. [2024-11-13 14:40:49,139 INFO L125 PetriNetUnfolderBase]: For 2572/2572 co-relation queries the response was YES. [2024-11-13 14:40:49,141 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2447 conditions, 506 events. 289/506 cut-off events. For 2572/2572 co-relation queries the response was YES. Maximal size of possible extension queue 38. Compared 1994 event pairs, 124 based on Foata normal form. 0/410 useless extension candidates. Maximal degree in co-relation 2000. Up to 498 conditions per place. [2024-11-13 14:40:49,145 INFO L140 encePairwiseOnDemand]: 17/20 looper letters, 72 selfloop transitions, 2 changer transitions 0/75 dead transitions. [2024-11-13 14:40:49,146 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 64 places, 75 transitions, 813 flow [2024-11-13 14:40:49,146 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-13 14:40:49,146 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-11-13 14:40:49,147 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 27 transitions. [2024-11-13 14:40:49,147 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.45 [2024-11-13 14:40:49,147 INFO L175 Difference]: Start difference. First operand has 62 places, 74 transitions, 663 flow. Second operand 3 states and 27 transitions. [2024-11-13 14:40:49,147 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 64 places, 75 transitions, 813 flow [2024-11-13 14:40:49,165 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 59 places, 75 transitions, 646 flow, removed 63 selfloop flow, removed 5 redundant places. [2024-11-13 14:40:49,167 INFO L231 Difference]: Finished difference. Result has 60 places, 75 transitions, 508 flow [2024-11-13 14:40:49,168 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=20, PETRI_DIFFERENCE_MINUEND_FLOW=496, PETRI_DIFFERENCE_MINUEND_PLACES=57, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=74, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=72, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=508, PETRI_PLACES=60, PETRI_TRANSITIONS=75} [2024-11-13 14:40:49,168 INFO L277 CegarLoopForPetriNet]: 21 programPoint places, 39 predicate places. [2024-11-13 14:40:49,169 INFO L471 AbstractCegarLoop]: Abstraction has has 60 places, 75 transitions, 508 flow [2024-11-13 14:40:49,169 INFO L472 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) [2024-11-13 14:40:49,169 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-13 14:40:49,169 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-13 14:40:49,194 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44d2f74b-8f25-498a-b792-4268e6d41a37/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Ended with exit code 0 [2024-11-13 14:40:49,373 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44d2f74b-8f25-498a-b792-4268e6d41a37/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-13 14:40:49,374 INFO L396 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-11-13 14:40:49,374 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-13 14:40:49,374 INFO L85 PathProgramCache]: Analyzing trace with hash 1258349572, now seen corresponding path program 1 times [2024-11-13 14:40:49,375 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2024-11-13 14:40:49,375 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2017207286] [2024-11-13 14:40:49,375 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-13 14:40:49,375 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-13 14:40:49,375 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44d2f74b-8f25-498a-b792-4268e6d41a37/bin/uautomizer-verify-qhAvR1uOyd/z3 [2024-11-13 14:40:49,378 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44d2f74b-8f25-498a-b792-4268e6d41a37/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-13 14:40:49,380 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44d2f74b-8f25-498a-b792-4268e6d41a37/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2024-11-13 14:40:49,478 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 14:40:49,482 INFO L255 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 5 conjuncts are in the unsatisfiable core [2024-11-13 14:40:49,485 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-13 14:40:49,558 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-13 14:40:49,558 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-13 14:40:49,752 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-13 14:40:49,753 INFO L136 FreeRefinementEngine]: Strategy FOX found an infeasible trace [2024-11-13 14:40:49,753 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2017207286] [2024-11-13 14:40:49,753 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2017207286] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-13 14:40:49,753 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-11-13 14:40:49,753 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 10 [2024-11-13 14:40:49,754 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [313200378] [2024-11-13 14:40:49,754 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-11-13 14:40:49,755 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-11-13 14:40:49,756 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FOX [2024-11-13 14:40:49,756 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-11-13 14:40:49,757 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2024-11-13 14:40:49,757 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 20 [2024-11-13 14:40:49,757 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 60 places, 75 transitions, 508 flow. Second operand has 10 states, 10 states have (on average 5.2) internal successors, (52), 10 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-13 14:40:49,757 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-13 14:40:49,758 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 20 [2024-11-13 14:40:49,758 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-13 14:40:50,743 INFO L124 PetriNetUnfolderBase]: 404/714 cut-off events. [2024-11-13 14:40:50,743 INFO L125 PetriNetUnfolderBase]: For 2197/2197 co-relation queries the response was YES. [2024-11-13 14:40:50,748 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2823 conditions, 714 events. 404/714 cut-off events. For 2197/2197 co-relation queries the response was YES. Maximal size of possible extension queue 56. Compared 3224 event pairs, 73 based on Foata normal form. 9/632 useless extension candidates. Maximal degree in co-relation 2796. Up to 220 conditions per place. [2024-11-13 14:40:50,754 INFO L140 encePairwiseOnDemand]: 14/20 looper letters, 104 selfloop transitions, 41 changer transitions 0/146 dead transitions. [2024-11-13 14:40:50,755 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 69 places, 146 transitions, 1099 flow [2024-11-13 14:40:50,755 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-11-13 14:40:50,755 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-11-13 14:40:50,756 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 101 transitions. [2024-11-13 14:40:50,759 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.505 [2024-11-13 14:40:50,760 INFO L175 Difference]: Start difference. First operand has 60 places, 75 transitions, 508 flow. Second operand 10 states and 101 transitions. [2024-11-13 14:40:50,760 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 69 places, 146 transitions, 1099 flow [2024-11-13 14:40:50,770 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 68 places, 146 transitions, 1087 flow, removed 5 selfloop flow, removed 1 redundant places. [2024-11-13 14:40:50,774 INFO L231 Difference]: Finished difference. Result has 73 places, 91 transitions, 762 flow [2024-11-13 14:40:50,778 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=20, PETRI_DIFFERENCE_MINUEND_FLOW=496, PETRI_DIFFERENCE_MINUEND_PLACES=59, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=75, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=28, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=42, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=762, PETRI_PLACES=73, PETRI_TRANSITIONS=91} [2024-11-13 14:40:50,779 INFO L277 CegarLoopForPetriNet]: 21 programPoint places, 52 predicate places. [2024-11-13 14:40:50,780 INFO L471 AbstractCegarLoop]: Abstraction has has 73 places, 91 transitions, 762 flow [2024-11-13 14:40:50,781 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 5.2) internal successors, (52), 10 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-13 14:40:50,781 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-13 14:40:50,781 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-13 14:40:50,806 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44d2f74b-8f25-498a-b792-4268e6d41a37/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2024-11-13 14:40:50,982 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44d2f74b-8f25-498a-b792-4268e6d41a37/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-13 14:40:50,982 INFO L396 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-11-13 14:40:50,982 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-13 14:40:50,982 INFO L85 PathProgramCache]: Analyzing trace with hash 2070515246, now seen corresponding path program 2 times [2024-11-13 14:40:50,983 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2024-11-13 14:40:50,983 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [5023616] [2024-11-13 14:40:50,983 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-13 14:40:50,983 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-13 14:40:50,983 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44d2f74b-8f25-498a-b792-4268e6d41a37/bin/uautomizer-verify-qhAvR1uOyd/z3 [2024-11-13 14:40:50,985 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44d2f74b-8f25-498a-b792-4268e6d41a37/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-13 14:40:50,986 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44d2f74b-8f25-498a-b792-4268e6d41a37/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2024-11-13 14:40:51,086 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-13 14:40:51,086 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-13 14:40:51,090 INFO L255 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 5 conjuncts are in the unsatisfiable core [2024-11-13 14:40:51,091 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-13 14:40:51,150 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-13 14:40:51,150 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-13 14:40:51,272 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-13 14:40:51,272 INFO L136 FreeRefinementEngine]: Strategy FOX found an infeasible trace [2024-11-13 14:40:51,272 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [5023616] [2024-11-13 14:40:51,272 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [5023616] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-13 14:40:51,272 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-11-13 14:40:51,273 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 10 [2024-11-13 14:40:51,273 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [490708093] [2024-11-13 14:40:51,273 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-11-13 14:40:51,273 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-11-13 14:40:51,273 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FOX [2024-11-13 14:40:51,274 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-11-13 14:40:51,274 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2024-11-13 14:40:51,274 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 20 [2024-11-13 14:40:51,274 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 73 places, 91 transitions, 762 flow. Second operand has 10 states, 10 states have (on average 5.1) internal successors, (51), 10 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-13 14:40:51,274 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-13 14:40:51,275 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 20 [2024-11-13 14:40:51,275 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-13 14:40:52,458 INFO L124 PetriNetUnfolderBase]: 401/708 cut-off events. [2024-11-13 14:40:52,458 INFO L125 PetriNetUnfolderBase]: For 3517/3517 co-relation queries the response was YES. [2024-11-13 14:40:52,461 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3202 conditions, 708 events. 401/708 cut-off events. For 3517/3517 co-relation queries the response was YES. Maximal size of possible extension queue 56. Compared 3137 event pairs, 33 based on Foata normal form. 9/682 useless extension candidates. Maximal degree in co-relation 3166. Up to 179 conditions per place. [2024-11-13 14:40:52,466 INFO L140 encePairwiseOnDemand]: 14/20 looper letters, 136 selfloop transitions, 54 changer transitions 0/191 dead transitions. [2024-11-13 14:40:52,467 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 85 places, 191 transitions, 1670 flow [2024-11-13 14:40:52,467 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2024-11-13 14:40:52,467 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2024-11-13 14:40:52,468 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 123 transitions. [2024-11-13 14:40:52,469 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.47307692307692306 [2024-11-13 14:40:52,469 INFO L175 Difference]: Start difference. First operand has 73 places, 91 transitions, 762 flow. Second operand 13 states and 123 transitions. [2024-11-13 14:40:52,469 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 85 places, 191 transitions, 1670 flow [2024-11-13 14:40:52,483 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 82 places, 191 transitions, 1554 flow, removed 42 selfloop flow, removed 3 redundant places. [2024-11-13 14:40:52,486 INFO L231 Difference]: Finished difference. Result has 88 places, 104 transitions, 978 flow [2024-11-13 14:40:52,487 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=20, PETRI_DIFFERENCE_MINUEND_FLOW=672, PETRI_DIFFERENCE_MINUEND_PLACES=70, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=91, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=41, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=45, PETRI_DIFFERENCE_SUBTRAHEND_STATES=13, PETRI_FLOW=978, PETRI_PLACES=88, PETRI_TRANSITIONS=104} [2024-11-13 14:40:52,487 INFO L277 CegarLoopForPetriNet]: 21 programPoint places, 67 predicate places. [2024-11-13 14:40:52,488 INFO L471 AbstractCegarLoop]: Abstraction has has 88 places, 104 transitions, 978 flow [2024-11-13 14:40:52,488 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 5.1) internal successors, (51), 10 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-13 14:40:52,488 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-13 14:40:52,488 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-13 14:40:52,513 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44d2f74b-8f25-498a-b792-4268e6d41a37/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Ended with exit code 0 [2024-11-13 14:40:52,692 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44d2f74b-8f25-498a-b792-4268e6d41a37/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-13 14:40:52,693 INFO L396 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-11-13 14:40:52,693 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-13 14:40:52,693 INFO L85 PathProgramCache]: Analyzing trace with hash -1480868690, now seen corresponding path program 3 times [2024-11-13 14:40:52,694 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2024-11-13 14:40:52,694 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [467429600] [2024-11-13 14:40:52,694 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-13 14:40:52,694 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-13 14:40:52,694 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44d2f74b-8f25-498a-b792-4268e6d41a37/bin/uautomizer-verify-qhAvR1uOyd/z3 [2024-11-13 14:40:52,696 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44d2f74b-8f25-498a-b792-4268e6d41a37/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-13 14:40:52,699 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44d2f74b-8f25-498a-b792-4268e6d41a37/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2024-11-13 14:40:52,808 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2024-11-13 14:40:52,808 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-13 14:40:52,813 INFO L255 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 5 conjuncts are in the unsatisfiable core [2024-11-13 14:40:52,814 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-13 14:40:52,880 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-13 14:40:52,880 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-13 14:40:53,045 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-13 14:40:53,045 INFO L136 FreeRefinementEngine]: Strategy FOX found an infeasible trace [2024-11-13 14:40:53,046 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [467429600] [2024-11-13 14:40:53,046 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [467429600] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-13 14:40:53,046 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-11-13 14:40:53,046 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 10 [2024-11-13 14:40:53,046 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1631352669] [2024-11-13 14:40:53,046 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-11-13 14:40:53,047 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-11-13 14:40:53,047 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FOX [2024-11-13 14:40:53,047 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-11-13 14:40:53,048 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2024-11-13 14:40:53,048 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 20 [2024-11-13 14:40:53,048 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 88 places, 104 transitions, 978 flow. Second operand has 10 states, 10 states have (on average 5.0) internal successors, (50), 10 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-13 14:40:53,048 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-13 14:40:53,048 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 20 [2024-11-13 14:40:53,048 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-13 14:40:53,845 INFO L124 PetriNetUnfolderBase]: 402/707 cut-off events. [2024-11-13 14:40:53,845 INFO L125 PetriNetUnfolderBase]: For 4445/4445 co-relation queries the response was YES. [2024-11-13 14:40:53,849 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3455 conditions, 707 events. 402/707 cut-off events. For 4445/4445 co-relation queries the response was YES. Maximal size of possible extension queue 56. Compared 3099 event pairs, 72 based on Foata normal form. 6/678 useless extension candidates. Maximal degree in co-relation 3412. Up to 215 conditions per place. [2024-11-13 14:40:53,855 INFO L140 encePairwiseOnDemand]: 14/20 looper letters, 105 selfloop transitions, 48 changer transitions 0/154 dead transitions. [2024-11-13 14:40:53,855 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 97 places, 154 transitions, 1512 flow [2024-11-13 14:40:53,856 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-11-13 14:40:53,856 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-11-13 14:40:53,857 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 94 transitions. [2024-11-13 14:40:53,857 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.47 [2024-11-13 14:40:53,857 INFO L175 Difference]: Start difference. First operand has 88 places, 104 transitions, 978 flow. Second operand 10 states and 94 transitions. [2024-11-13 14:40:53,857 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 97 places, 154 transitions, 1512 flow [2024-11-13 14:40:53,877 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 91 places, 154 transitions, 1362 flow, removed 50 selfloop flow, removed 6 redundant places. [2024-11-13 14:40:53,881 INFO L231 Difference]: Finished difference. Result has 93 places, 107 transitions, 977 flow [2024-11-13 14:40:53,883 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=20, PETRI_DIFFERENCE_MINUEND_FLOW=845, PETRI_DIFFERENCE_MINUEND_PLACES=82, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=104, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=45, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=59, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=977, PETRI_PLACES=93, PETRI_TRANSITIONS=107} [2024-11-13 14:40:53,884 INFO L277 CegarLoopForPetriNet]: 21 programPoint places, 72 predicate places. [2024-11-13 14:40:53,884 INFO L471 AbstractCegarLoop]: Abstraction has has 93 places, 107 transitions, 977 flow [2024-11-13 14:40:53,885 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 5.0) internal successors, (50), 10 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-13 14:40:53,885 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-13 14:40:53,885 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-13 14:40:53,910 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44d2f74b-8f25-498a-b792-4268e6d41a37/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Ended with exit code 0 [2024-11-13 14:40:54,085 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44d2f74b-8f25-498a-b792-4268e6d41a37/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-13 14:40:54,086 INFO L396 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-11-13 14:40:54,086 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-13 14:40:54,086 INFO L85 PathProgramCache]: Analyzing trace with hash -629724558, now seen corresponding path program 4 times [2024-11-13 14:40:54,086 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2024-11-13 14:40:54,087 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [835839606] [2024-11-13 14:40:54,087 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-11-13 14:40:54,087 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-13 14:40:54,087 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44d2f74b-8f25-498a-b792-4268e6d41a37/bin/uautomizer-verify-qhAvR1uOyd/z3 [2024-11-13 14:40:54,090 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44d2f74b-8f25-498a-b792-4268e6d41a37/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-13 14:40:54,103 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44d2f74b-8f25-498a-b792-4268e6d41a37/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2024-11-13 14:40:54,217 INFO L227 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-11-13 14:40:54,217 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-13 14:40:54,220 INFO L255 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 5 conjuncts are in the unsatisfiable core [2024-11-13 14:40:54,222 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-13 14:40:54,300 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-13 14:40:54,300 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-13 14:40:54,514 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-13 14:40:54,514 INFO L136 FreeRefinementEngine]: Strategy FOX found an infeasible trace [2024-11-13 14:40:54,514 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [835839606] [2024-11-13 14:40:54,514 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [835839606] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-13 14:40:54,515 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-11-13 14:40:54,515 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 10 [2024-11-13 14:40:54,515 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1027318835] [2024-11-13 14:40:54,515 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-11-13 14:40:54,515 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-11-13 14:40:54,515 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FOX [2024-11-13 14:40:54,516 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-11-13 14:40:54,516 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2024-11-13 14:40:54,516 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 20 [2024-11-13 14:40:54,516 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 93 places, 107 transitions, 977 flow. Second operand has 10 states, 10 states have (on average 5.0) internal successors, (50), 10 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-13 14:40:54,516 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-13 14:40:54,516 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 20 [2024-11-13 14:40:54,516 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-13 14:40:55,165 INFO L124 PetriNetUnfolderBase]: 402/711 cut-off events. [2024-11-13 14:40:55,166 INFO L125 PetriNetUnfolderBase]: For 3622/3622 co-relation queries the response was YES. [2024-11-13 14:40:55,169 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3318 conditions, 711 events. 402/711 cut-off events. For 3622/3622 co-relation queries the response was YES. Maximal size of possible extension queue 59. Compared 3158 event pairs, 120 based on Foata normal form. 6/682 useless extension candidates. Maximal degree in co-relation 3275. Up to 467 conditions per place. [2024-11-13 14:40:55,174 INFO L140 encePairwiseOnDemand]: 14/20 looper letters, 114 selfloop transitions, 31 changer transitions 0/146 dead transitions. [2024-11-13 14:40:55,174 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 101 places, 146 transitions, 1459 flow [2024-11-13 14:40:55,175 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-11-13 14:40:55,175 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-11-13 14:40:55,176 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 80 transitions. [2024-11-13 14:40:55,177 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.4444444444444444 [2024-11-13 14:40:55,178 INFO L175 Difference]: Start difference. First operand has 93 places, 107 transitions, 977 flow. Second operand 9 states and 80 transitions. [2024-11-13 14:40:55,178 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 101 places, 146 transitions, 1459 flow [2024-11-13 14:40:55,195 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 96 places, 146 transitions, 1394 flow, removed 3 selfloop flow, removed 5 redundant places. [2024-11-13 14:40:55,199 INFO L231 Difference]: Finished difference. Result has 100 places, 113 transitions, 1077 flow [2024-11-13 14:40:55,199 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=20, PETRI_DIFFERENCE_MINUEND_FLOW=916, PETRI_DIFFERENCE_MINUEND_PLACES=88, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=107, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=25, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=78, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1077, PETRI_PLACES=100, PETRI_TRANSITIONS=113} [2024-11-13 14:40:55,200 INFO L277 CegarLoopForPetriNet]: 21 programPoint places, 79 predicate places. [2024-11-13 14:40:55,200 INFO L471 AbstractCegarLoop]: Abstraction has has 100 places, 113 transitions, 1077 flow [2024-11-13 14:40:55,200 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 5.0) internal successors, (50), 10 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-13 14:40:55,200 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-13 14:40:55,200 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-13 14:40:55,227 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44d2f74b-8f25-498a-b792-4268e6d41a37/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Ended with exit code 0 [2024-11-13 14:40:55,402 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44d2f74b-8f25-498a-b792-4268e6d41a37/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-13 14:40:55,402 INFO L396 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-11-13 14:40:55,403 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-13 14:40:55,403 INFO L85 PathProgramCache]: Analyzing trace with hash -1481359875, now seen corresponding path program 1 times [2024-11-13 14:40:55,403 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2024-11-13 14:40:55,403 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1061136982] [2024-11-13 14:40:55,403 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-13 14:40:55,403 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-13 14:40:55,403 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44d2f74b-8f25-498a-b792-4268e6d41a37/bin/uautomizer-verify-qhAvR1uOyd/z3 [2024-11-13 14:40:55,407 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44d2f74b-8f25-498a-b792-4268e6d41a37/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-13 14:40:55,410 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44d2f74b-8f25-498a-b792-4268e6d41a37/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2024-11-13 14:40:55,515 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 14:40:55,520 INFO L255 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 5 conjuncts are in the unsatisfiable core [2024-11-13 14:40:55,521 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-13 14:40:55,602 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-13 14:40:55,603 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-13 14:40:55,851 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-13 14:40:55,851 INFO L136 FreeRefinementEngine]: Strategy FOX found an infeasible trace [2024-11-13 14:40:55,852 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1061136982] [2024-11-13 14:40:55,852 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1061136982] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-13 14:40:55,852 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-11-13 14:40:55,852 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 10 [2024-11-13 14:40:55,852 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1477875274] [2024-11-13 14:40:55,852 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-11-13 14:40:55,852 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-11-13 14:40:55,852 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FOX [2024-11-13 14:40:55,853 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-11-13 14:40:55,853 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2024-11-13 14:40:55,853 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 20 [2024-11-13 14:40:55,853 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 100 places, 113 transitions, 1077 flow. Second operand has 10 states, 10 states have (on average 5.1) internal successors, (51), 10 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-13 14:40:55,853 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-13 14:40:55,853 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 20 [2024-11-13 14:40:55,853 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-13 14:40:57,562 INFO L124 PetriNetUnfolderBase]: 470/825 cut-off events. [2024-11-13 14:40:57,562 INFO L125 PetriNetUnfolderBase]: For 4453/4453 co-relation queries the response was YES. [2024-11-13 14:40:57,567 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3932 conditions, 825 events. 470/825 cut-off events. For 4453/4453 co-relation queries the response was YES. Maximal size of possible extension queue 72. Compared 3803 event pairs, 67 based on Foata normal form. 15/798 useless extension candidates. Maximal degree in co-relation 3885. Up to 253 conditions per place. [2024-11-13 14:40:57,573 INFO L140 encePairwiseOnDemand]: 14/20 looper letters, 111 selfloop transitions, 91 changer transitions 0/203 dead transitions. [2024-11-13 14:40:57,573 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 115 places, 203 transitions, 1971 flow [2024-11-13 14:40:57,574 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2024-11-13 14:40:57,574 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2024-11-13 14:40:57,577 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 147 transitions. [2024-11-13 14:40:57,578 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.459375 [2024-11-13 14:40:57,578 INFO L175 Difference]: Start difference. First operand has 100 places, 113 transitions, 1077 flow. Second operand 16 states and 147 transitions. [2024-11-13 14:40:57,578 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 115 places, 203 transitions, 1971 flow [2024-11-13 14:40:57,603 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 111 places, 203 transitions, 1869 flow, removed 23 selfloop flow, removed 4 redundant places. [2024-11-13 14:40:57,609 INFO L231 Difference]: Finished difference. Result has 117 places, 149 transitions, 1571 flow [2024-11-13 14:40:57,610 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=20, PETRI_DIFFERENCE_MINUEND_FLOW=999, PETRI_DIFFERENCE_MINUEND_PLACES=96, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=113, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=65, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=46, PETRI_DIFFERENCE_SUBTRAHEND_STATES=16, PETRI_FLOW=1571, PETRI_PLACES=117, PETRI_TRANSITIONS=149} [2024-11-13 14:40:57,611 INFO L277 CegarLoopForPetriNet]: 21 programPoint places, 96 predicate places. [2024-11-13 14:40:57,611 INFO L471 AbstractCegarLoop]: Abstraction has has 117 places, 149 transitions, 1571 flow [2024-11-13 14:40:57,612 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 5.1) internal successors, (51), 10 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-13 14:40:57,612 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-13 14:40:57,612 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-13 14:40:57,638 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44d2f74b-8f25-498a-b792-4268e6d41a37/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Ended with exit code 0 [2024-11-13 14:40:57,812 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44d2f74b-8f25-498a-b792-4268e6d41a37/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-13 14:40:57,813 INFO L396 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-11-13 14:40:57,813 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-13 14:40:57,814 INFO L85 PathProgramCache]: Analyzing trace with hash 1262092141, now seen corresponding path program 2 times [2024-11-13 14:40:57,814 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2024-11-13 14:40:57,814 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [946649927] [2024-11-13 14:40:57,814 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-13 14:40:57,814 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-13 14:40:57,815 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44d2f74b-8f25-498a-b792-4268e6d41a37/bin/uautomizer-verify-qhAvR1uOyd/z3 [2024-11-13 14:40:57,817 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44d2f74b-8f25-498a-b792-4268e6d41a37/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-13 14:40:57,821 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44d2f74b-8f25-498a-b792-4268e6d41a37/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2024-11-13 14:40:57,949 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-13 14:40:57,949 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-13 14:40:57,951 INFO L255 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 5 conjuncts are in the unsatisfiable core [2024-11-13 14:40:57,952 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-13 14:40:58,038 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-13 14:40:58,038 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-13 14:40:58,205 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-13 14:40:58,205 INFO L136 FreeRefinementEngine]: Strategy FOX found an infeasible trace [2024-11-13 14:40:58,205 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [946649927] [2024-11-13 14:40:58,205 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [946649927] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-13 14:40:58,205 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-11-13 14:40:58,206 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 10 [2024-11-13 14:40:58,206 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1677060702] [2024-11-13 14:40:58,206 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-11-13 14:40:58,206 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-11-13 14:40:58,206 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FOX [2024-11-13 14:40:58,206 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-11-13 14:40:58,207 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2024-11-13 14:40:58,207 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 20 [2024-11-13 14:40:58,207 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 117 places, 149 transitions, 1571 flow. Second operand has 10 states, 10 states have (on average 5.1) internal successors, (51), 10 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-13 14:40:58,207 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-13 14:40:58,207 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 20 [2024-11-13 14:40:58,207 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-13 14:40:59,791 INFO L124 PetriNetUnfolderBase]: 468/826 cut-off events. [2024-11-13 14:40:59,792 INFO L125 PetriNetUnfolderBase]: For 4626/4626 co-relation queries the response was YES. [2024-11-13 14:40:59,797 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4337 conditions, 826 events. 468/826 cut-off events. For 4626/4626 co-relation queries the response was YES. Maximal size of possible extension queue 72. Compared 3845 event pairs, 71 based on Foata normal form. 12/806 useless extension candidates. Maximal degree in co-relation 4284. Up to 297 conditions per place. [2024-11-13 14:40:59,802 INFO L140 encePairwiseOnDemand]: 14/20 looper letters, 132 selfloop transitions, 72 changer transitions 0/205 dead transitions. [2024-11-13 14:40:59,803 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 130 places, 205 transitions, 2247 flow [2024-11-13 14:40:59,803 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2024-11-13 14:40:59,803 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2024-11-13 14:40:59,804 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 123 transitions. [2024-11-13 14:40:59,804 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.4392857142857143 [2024-11-13 14:40:59,805 INFO L175 Difference]: Start difference. First operand has 117 places, 149 transitions, 1571 flow. Second operand 14 states and 123 transitions. [2024-11-13 14:40:59,805 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 130 places, 205 transitions, 2247 flow [2024-11-13 14:40:59,840 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 126 places, 205 transitions, 2085 flow, removed 71 selfloop flow, removed 4 redundant places. [2024-11-13 14:40:59,844 INFO L231 Difference]: Finished difference. Result has 130 places, 157 transitions, 1690 flow [2024-11-13 14:40:59,845 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=20, PETRI_DIFFERENCE_MINUEND_FLOW=1430, PETRI_DIFFERENCE_MINUEND_PLACES=113, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=149, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=64, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=79, PETRI_DIFFERENCE_SUBTRAHEND_STATES=14, PETRI_FLOW=1690, PETRI_PLACES=130, PETRI_TRANSITIONS=157} [2024-11-13 14:40:59,846 INFO L277 CegarLoopForPetriNet]: 21 programPoint places, 109 predicate places. [2024-11-13 14:40:59,846 INFO L471 AbstractCegarLoop]: Abstraction has has 130 places, 157 transitions, 1690 flow [2024-11-13 14:40:59,846 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 5.1) internal successors, (51), 10 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-13 14:40:59,846 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-13 14:40:59,846 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-13 14:40:59,870 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44d2f74b-8f25-498a-b792-4268e6d41a37/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Ended with exit code 0 [2024-11-13 14:41:00,047 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44d2f74b-8f25-498a-b792-4268e6d41a37/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-13 14:41:00,047 INFO L396 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-11-13 14:41:00,047 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-13 14:41:00,048 INFO L85 PathProgramCache]: Analyzing trace with hash 1609634488, now seen corresponding path program 5 times [2024-11-13 14:41:00,048 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2024-11-13 14:41:00,048 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [264078508] [2024-11-13 14:41:00,048 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-11-13 14:41:00,048 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-13 14:41:00,048 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44d2f74b-8f25-498a-b792-4268e6d41a37/bin/uautomizer-verify-qhAvR1uOyd/z3 [2024-11-13 14:41:00,050 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44d2f74b-8f25-498a-b792-4268e6d41a37/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-13 14:41:00,051 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44d2f74b-8f25-498a-b792-4268e6d41a37/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2024-11-13 14:41:00,149 INFO L227 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-13 14:41:00,149 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-13 14:41:00,153 INFO L255 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 5 conjuncts are in the unsatisfiable core [2024-11-13 14:41:00,155 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-13 14:41:00,224 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-13 14:41:00,224 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-13 14:41:00,440 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-13 14:41:00,440 INFO L136 FreeRefinementEngine]: Strategy FOX found an infeasible trace [2024-11-13 14:41:00,440 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [264078508] [2024-11-13 14:41:00,441 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [264078508] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-13 14:41:00,441 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-11-13 14:41:00,441 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 10 [2024-11-13 14:41:00,441 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [908712488] [2024-11-13 14:41:00,441 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-11-13 14:41:00,441 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-11-13 14:41:00,441 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FOX [2024-11-13 14:41:00,442 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-11-13 14:41:00,442 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2024-11-13 14:41:00,442 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 20 [2024-11-13 14:41:00,442 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 130 places, 157 transitions, 1690 flow. Second operand has 10 states, 10 states have (on average 5.1) internal successors, (51), 10 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-13 14:41:00,442 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-13 14:41:00,442 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 20 [2024-11-13 14:41:00,442 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-13 14:41:01,556 INFO L124 PetriNetUnfolderBase]: 472/842 cut-off events. [2024-11-13 14:41:01,556 INFO L125 PetriNetUnfolderBase]: For 4714/4714 co-relation queries the response was YES. [2024-11-13 14:41:01,561 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4471 conditions, 842 events. 472/842 cut-off events. For 4714/4714 co-relation queries the response was YES. Maximal size of possible extension queue 77. Compared 4033 event pairs, 110 based on Foata normal form. 4/816 useless extension candidates. Maximal degree in co-relation 4414. Up to 567 conditions per place. [2024-11-13 14:41:01,567 INFO L140 encePairwiseOnDemand]: 14/20 looper letters, 129 selfloop transitions, 63 changer transitions 0/193 dead transitions. [2024-11-13 14:41:01,567 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 139 places, 193 transitions, 2356 flow [2024-11-13 14:41:01,568 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-11-13 14:41:01,568 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-11-13 14:41:01,569 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 88 transitions. [2024-11-13 14:41:01,569 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.44 [2024-11-13 14:41:01,569 INFO L175 Difference]: Start difference. First operand has 130 places, 157 transitions, 1690 flow. Second operand 10 states and 88 transitions. [2024-11-13 14:41:01,570 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 139 places, 193 transitions, 2356 flow [2024-11-13 14:41:01,596 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 135 places, 193 transitions, 2306 flow, removed 5 selfloop flow, removed 4 redundant places. [2024-11-13 14:41:01,600 INFO L231 Difference]: Finished difference. Result has 138 places, 163 transitions, 1846 flow [2024-11-13 14:41:01,601 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=20, PETRI_DIFFERENCE_MINUEND_FLOW=1646, PETRI_DIFFERENCE_MINUEND_PLACES=126, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=157, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=57, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=97, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=1846, PETRI_PLACES=138, PETRI_TRANSITIONS=163} [2024-11-13 14:41:01,601 INFO L277 CegarLoopForPetriNet]: 21 programPoint places, 117 predicate places. [2024-11-13 14:41:01,602 INFO L471 AbstractCegarLoop]: Abstraction has has 138 places, 163 transitions, 1846 flow [2024-11-13 14:41:01,602 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 5.1) internal successors, (51), 10 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-13 14:41:01,602 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-13 14:41:01,602 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-13 14:41:01,627 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44d2f74b-8f25-498a-b792-4268e6d41a37/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Ended with exit code 0 [2024-11-13 14:41:01,802 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44d2f74b-8f25-498a-b792-4268e6d41a37/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-13 14:41:01,803 INFO L396 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-11-13 14:41:01,803 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-13 14:41:01,803 INFO L85 PathProgramCache]: Analyzing trace with hash -1909763424, now seen corresponding path program 6 times [2024-11-13 14:41:01,803 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2024-11-13 14:41:01,803 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2051170729] [2024-11-13 14:41:01,803 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2024-11-13 14:41:01,804 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-13 14:41:01,804 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44d2f74b-8f25-498a-b792-4268e6d41a37/bin/uautomizer-verify-qhAvR1uOyd/z3 [2024-11-13 14:41:01,806 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44d2f74b-8f25-498a-b792-4268e6d41a37/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-13 14:41:01,807 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44d2f74b-8f25-498a-b792-4268e6d41a37/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2024-11-13 14:41:01,915 INFO L227 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2024-11-13 14:41:01,915 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-13 14:41:01,918 INFO L255 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 5 conjuncts are in the unsatisfiable core [2024-11-13 14:41:01,919 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-13 14:41:01,986 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-13 14:41:01,986 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-13 14:41:02,156 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-13 14:41:02,156 INFO L136 FreeRefinementEngine]: Strategy FOX found an infeasible trace [2024-11-13 14:41:02,156 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2051170729] [2024-11-13 14:41:02,157 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2051170729] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-13 14:41:02,157 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-11-13 14:41:02,157 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 10 [2024-11-13 14:41:02,157 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2123111257] [2024-11-13 14:41:02,157 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-11-13 14:41:02,157 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-11-13 14:41:02,157 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FOX [2024-11-13 14:41:02,158 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-11-13 14:41:02,158 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2024-11-13 14:41:02,158 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 20 [2024-11-13 14:41:02,158 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 138 places, 163 transitions, 1846 flow. Second operand has 10 states, 10 states have (on average 5.1) internal successors, (51), 10 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-13 14:41:02,158 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-13 14:41:02,158 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 20 [2024-11-13 14:41:02,159 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-13 14:41:03,453 INFO L124 PetriNetUnfolderBase]: 464/828 cut-off events. [2024-11-13 14:41:03,453 INFO L125 PetriNetUnfolderBase]: For 4963/4963 co-relation queries the response was YES. [2024-11-13 14:41:03,459 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4545 conditions, 828 events. 464/828 cut-off events. For 4963/4963 co-relation queries the response was YES. Maximal size of possible extension queue 77. Compared 3913 event pairs, 113 based on Foata normal form. 9/807 useless extension candidates. Maximal degree in co-relation 4485. Up to 578 conditions per place. [2024-11-13 14:41:03,465 INFO L140 encePairwiseOnDemand]: 14/20 looper letters, 122 selfloop transitions, 76 changer transitions 0/199 dead transitions. [2024-11-13 14:41:03,465 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 149 places, 199 transitions, 2528 flow [2024-11-13 14:41:03,466 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-11-13 14:41:03,466 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-11-13 14:41:03,467 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 105 transitions. [2024-11-13 14:41:03,469 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.4375 [2024-11-13 14:41:03,469 INFO L175 Difference]: Start difference. First operand has 138 places, 163 transitions, 1846 flow. Second operand 12 states and 105 transitions. [2024-11-13 14:41:03,469 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 149 places, 199 transitions, 2528 flow [2024-11-13 14:41:03,503 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 145 places, 199 transitions, 2454 flow, removed 4 selfloop flow, removed 4 redundant places. [2024-11-13 14:41:03,507 INFO L231 Difference]: Finished difference. Result has 146 places, 173 transitions, 2104 flow [2024-11-13 14:41:03,507 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=20, PETRI_DIFFERENCE_MINUEND_FLOW=1776, PETRI_DIFFERENCE_MINUEND_PLACES=134, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=163, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=68, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=93, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=2104, PETRI_PLACES=146, PETRI_TRANSITIONS=173} [2024-11-13 14:41:03,509 INFO L277 CegarLoopForPetriNet]: 21 programPoint places, 125 predicate places. [2024-11-13 14:41:03,510 INFO L471 AbstractCegarLoop]: Abstraction has has 146 places, 173 transitions, 2104 flow [2024-11-13 14:41:03,511 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 5.1) internal successors, (51), 10 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-13 14:41:03,511 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-13 14:41:03,511 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-13 14:41:03,537 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44d2f74b-8f25-498a-b792-4268e6d41a37/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Ended with exit code 0 [2024-11-13 14:41:03,711 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44d2f74b-8f25-498a-b792-4268e6d41a37/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-13 14:41:03,714 INFO L396 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-11-13 14:41:03,714 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-13 14:41:03,714 INFO L85 PathProgramCache]: Analyzing trace with hash -42344821, now seen corresponding path program 3 times [2024-11-13 14:41:03,714 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2024-11-13 14:41:03,714 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [101475898] [2024-11-13 14:41:03,714 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-13 14:41:03,715 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-13 14:41:03,715 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44d2f74b-8f25-498a-b792-4268e6d41a37/bin/uautomizer-verify-qhAvR1uOyd/z3 [2024-11-13 14:41:03,718 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44d2f74b-8f25-498a-b792-4268e6d41a37/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-13 14:41:03,720 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44d2f74b-8f25-498a-b792-4268e6d41a37/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2024-11-13 14:41:03,844 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2024-11-13 14:41:03,845 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-13 14:41:03,847 INFO L255 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 5 conjuncts are in the unsatisfiable core [2024-11-13 14:41:03,848 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-13 14:41:03,900 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-13 14:41:03,900 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-13 14:41:04,047 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-13 14:41:04,047 INFO L136 FreeRefinementEngine]: Strategy FOX found an infeasible trace [2024-11-13 14:41:04,047 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [101475898] [2024-11-13 14:41:04,047 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [101475898] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-13 14:41:04,049 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-11-13 14:41:04,049 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 10 [2024-11-13 14:41:04,049 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1045953389] [2024-11-13 14:41:04,049 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-11-13 14:41:04,050 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-11-13 14:41:04,050 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FOX [2024-11-13 14:41:04,052 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-11-13 14:41:04,052 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2024-11-13 14:41:04,052 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 20 [2024-11-13 14:41:04,052 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 146 places, 173 transitions, 2104 flow. Second operand has 10 states, 10 states have (on average 5.0) internal successors, (50), 10 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-13 14:41:04,053 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-13 14:41:04,053 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 20 [2024-11-13 14:41:04,053 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-13 14:41:05,234 INFO L124 PetriNetUnfolderBase]: 464/836 cut-off events. [2024-11-13 14:41:05,234 INFO L125 PetriNetUnfolderBase]: For 5344/5344 co-relation queries the response was YES. [2024-11-13 14:41:05,239 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4747 conditions, 836 events. 464/836 cut-off events. For 5344/5344 co-relation queries the response was YES. Maximal size of possible extension queue 78. Compared 4062 event pairs, 42 based on Foata normal form. 10/816 useless extension candidates. Maximal degree in co-relation 4686. Up to 240 conditions per place. [2024-11-13 14:41:05,245 INFO L140 encePairwiseOnDemand]: 14/20 looper letters, 112 selfloop transitions, 109 changer transitions 0/222 dead transitions. [2024-11-13 14:41:05,246 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 159 places, 222 transitions, 2951 flow [2024-11-13 14:41:05,247 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2024-11-13 14:41:05,247 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2024-11-13 14:41:05,248 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 132 transitions. [2024-11-13 14:41:05,248 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.4714285714285714 [2024-11-13 14:41:05,248 INFO L175 Difference]: Start difference. First operand has 146 places, 173 transitions, 2104 flow. Second operand 14 states and 132 transitions. [2024-11-13 14:41:05,248 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 159 places, 222 transitions, 2951 flow [2024-11-13 14:41:05,284 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 155 places, 222 transitions, 2813 flow, removed 53 selfloop flow, removed 4 redundant places. [2024-11-13 14:41:05,287 INFO L231 Difference]: Finished difference. Result has 158 places, 178 transitions, 2300 flow [2024-11-13 14:41:05,287 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=20, PETRI_DIFFERENCE_MINUEND_FLOW=1966, PETRI_DIFFERENCE_MINUEND_PLACES=142, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=173, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=104, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=66, PETRI_DIFFERENCE_SUBTRAHEND_STATES=14, PETRI_FLOW=2300, PETRI_PLACES=158, PETRI_TRANSITIONS=178} [2024-11-13 14:41:05,288 INFO L277 CegarLoopForPetriNet]: 21 programPoint places, 137 predicate places. [2024-11-13 14:41:05,288 INFO L471 AbstractCegarLoop]: Abstraction has has 158 places, 178 transitions, 2300 flow [2024-11-13 14:41:05,288 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 5.0) internal successors, (50), 10 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-13 14:41:05,288 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-13 14:41:05,289 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-13 14:41:05,305 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44d2f74b-8f25-498a-b792-4268e6d41a37/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Ended with exit code 0 [2024-11-13 14:41:05,489 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44d2f74b-8f25-498a-b792-4268e6d41a37/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-13 14:41:05,489 INFO L396 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-11-13 14:41:05,490 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-13 14:41:05,490 INFO L85 PathProgramCache]: Analyzing trace with hash -42939467, now seen corresponding path program 4 times [2024-11-13 14:41:05,490 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2024-11-13 14:41:05,490 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [547322157] [2024-11-13 14:41:05,490 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-11-13 14:41:05,490 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-13 14:41:05,490 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44d2f74b-8f25-498a-b792-4268e6d41a37/bin/uautomizer-verify-qhAvR1uOyd/z3 [2024-11-13 14:41:05,492 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44d2f74b-8f25-498a-b792-4268e6d41a37/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-13 14:41:05,493 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44d2f74b-8f25-498a-b792-4268e6d41a37/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2024-11-13 14:41:05,592 INFO L227 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-11-13 14:41:05,592 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-13 14:41:05,594 INFO L255 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 5 conjuncts are in the unsatisfiable core [2024-11-13 14:41:05,595 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-13 14:41:05,660 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-13 14:41:05,660 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-13 14:41:05,747 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-13 14:41:05,747 INFO L136 FreeRefinementEngine]: Strategy FOX found an infeasible trace [2024-11-13 14:41:05,747 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [547322157] [2024-11-13 14:41:05,747 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [547322157] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-13 14:41:05,747 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-11-13 14:41:05,747 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 10 [2024-11-13 14:41:05,747 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2052132777] [2024-11-13 14:41:05,748 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-11-13 14:41:05,748 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-11-13 14:41:05,748 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FOX [2024-11-13 14:41:05,748 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-11-13 14:41:05,748 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2024-11-13 14:41:05,749 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 20 [2024-11-13 14:41:05,749 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 158 places, 178 transitions, 2300 flow. Second operand has 10 states, 10 states have (on average 5.0) internal successors, (50), 10 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-13 14:41:05,749 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-13 14:41:05,749 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 20 [2024-11-13 14:41:05,749 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-13 14:41:06,801 INFO L124 PetriNetUnfolderBase]: 469/851 cut-off events. [2024-11-13 14:41:06,801 INFO L125 PetriNetUnfolderBase]: For 5653/5653 co-relation queries the response was YES. [2024-11-13 14:41:06,805 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5150 conditions, 851 events. 469/851 cut-off events. For 5653/5653 co-relation queries the response was YES. Maximal size of possible extension queue 81. Compared 4153 event pairs, 22 based on Foata normal form. 8/829 useless extension candidates. Maximal degree in co-relation 5086. Up to 205 conditions per place. [2024-11-13 14:41:06,811 INFO L140 encePairwiseOnDemand]: 14/20 looper letters, 129 selfloop transitions, 122 changer transitions 0/252 dead transitions. [2024-11-13 14:41:06,811 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 172 places, 252 transitions, 3527 flow [2024-11-13 14:41:06,812 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2024-11-13 14:41:06,812 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2024-11-13 14:41:06,813 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 141 transitions. [2024-11-13 14:41:06,813 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.47 [2024-11-13 14:41:06,813 INFO L175 Difference]: Start difference. First operand has 158 places, 178 transitions, 2300 flow. Second operand 15 states and 141 transitions. [2024-11-13 14:41:06,813 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 172 places, 252 transitions, 3527 flow [2024-11-13 14:41:06,852 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 161 places, 252 transitions, 3224 flow, removed 13 selfloop flow, removed 11 redundant places. [2024-11-13 14:41:06,856 INFO L231 Difference]: Finished difference. Result has 166 places, 200 transitions, 2616 flow [2024-11-13 14:41:06,856 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=20, PETRI_DIFFERENCE_MINUEND_FLOW=2038, PETRI_DIFFERENCE_MINUEND_PLACES=147, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=178, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=101, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=73, PETRI_DIFFERENCE_SUBTRAHEND_STATES=15, PETRI_FLOW=2616, PETRI_PLACES=166, PETRI_TRANSITIONS=200} [2024-11-13 14:41:06,857 INFO L277 CegarLoopForPetriNet]: 21 programPoint places, 145 predicate places. [2024-11-13 14:41:06,857 INFO L471 AbstractCegarLoop]: Abstraction has has 166 places, 200 transitions, 2616 flow [2024-11-13 14:41:06,857 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 5.0) internal successors, (50), 10 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-13 14:41:06,857 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-13 14:41:06,857 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-13 14:41:06,875 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44d2f74b-8f25-498a-b792-4268e6d41a37/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Ended with exit code 0 [2024-11-13 14:41:07,058 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44d2f74b-8f25-498a-b792-4268e6d41a37/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-13 14:41:07,058 INFO L396 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-11-13 14:41:07,058 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-13 14:41:07,058 INFO L85 PathProgramCache]: Analyzing trace with hash -1831115184, now seen corresponding path program 7 times [2024-11-13 14:41:07,059 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2024-11-13 14:41:07,059 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2069634845] [2024-11-13 14:41:07,059 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-11-13 14:41:07,059 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-13 14:41:07,059 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44d2f74b-8f25-498a-b792-4268e6d41a37/bin/uautomizer-verify-qhAvR1uOyd/z3 [2024-11-13 14:41:07,061 INFO L229 MonitoredProcess]: Starting monitored process 20 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44d2f74b-8f25-498a-b792-4268e6d41a37/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-13 14:41:07,062 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44d2f74b-8f25-498a-b792-4268e6d41a37/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2024-11-13 14:41:07,154 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 14:41:07,157 INFO L255 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 5 conjuncts are in the unsatisfiable core [2024-11-13 14:41:07,158 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-13 14:41:07,220 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-13 14:41:07,220 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-13 14:41:07,427 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-13 14:41:07,428 INFO L136 FreeRefinementEngine]: Strategy FOX found an infeasible trace [2024-11-13 14:41:07,428 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2069634845] [2024-11-13 14:41:07,428 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2069634845] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-13 14:41:07,428 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-11-13 14:41:07,428 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 10 [2024-11-13 14:41:07,428 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1515804548] [2024-11-13 14:41:07,428 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-11-13 14:41:07,429 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-11-13 14:41:07,429 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FOX [2024-11-13 14:41:07,429 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-11-13 14:41:07,429 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=62, Unknown=0, NotChecked=0, Total=90 [2024-11-13 14:41:07,429 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 20 [2024-11-13 14:41:07,430 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 166 places, 200 transitions, 2616 flow. Second operand has 10 states, 10 states have (on average 5.0) internal successors, (50), 10 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-13 14:41:07,430 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-13 14:41:07,430 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 20 [2024-11-13 14:41:07,430 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-13 14:41:08,334 INFO L124 PetriNetUnfolderBase]: 469/847 cut-off events. [2024-11-13 14:41:08,334 INFO L125 PetriNetUnfolderBase]: For 6546/6546 co-relation queries the response was YES. [2024-11-13 14:41:08,338 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5177 conditions, 847 events. 469/847 cut-off events. For 6546/6546 co-relation queries the response was YES. Maximal size of possible extension queue 79. Compared 4086 event pairs, 121 based on Foata normal form. 4/833 useless extension candidates. Maximal degree in co-relation 5109. Up to 589 conditions per place. [2024-11-13 14:41:08,344 INFO L140 encePairwiseOnDemand]: 14/20 looper letters, 143 selfloop transitions, 79 changer transitions 0/223 dead transitions. [2024-11-13 14:41:08,344 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 176 places, 223 transitions, 3193 flow [2024-11-13 14:41:08,345 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-11-13 14:41:08,345 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-11-13 14:41:08,346 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 97 transitions. [2024-11-13 14:41:08,346 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.4409090909090909 [2024-11-13 14:41:08,346 INFO L175 Difference]: Start difference. First operand has 166 places, 200 transitions, 2616 flow. Second operand 11 states and 97 transitions. [2024-11-13 14:41:08,346 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 176 places, 223 transitions, 3193 flow [2024-11-13 14:41:08,384 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 175 places, 223 transitions, 3060 flow, removed 41 selfloop flow, removed 1 redundant places. [2024-11-13 14:41:08,387 INFO L231 Difference]: Finished difference. Result has 176 places, 200 transitions, 2663 flow [2024-11-13 14:41:08,387 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=20, PETRI_DIFFERENCE_MINUEND_FLOW=2470, PETRI_DIFFERENCE_MINUEND_PLACES=165, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=199, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=78, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=120, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=2663, PETRI_PLACES=176, PETRI_TRANSITIONS=200} [2024-11-13 14:41:08,387 INFO L277 CegarLoopForPetriNet]: 21 programPoint places, 155 predicate places. [2024-11-13 14:41:08,388 INFO L471 AbstractCegarLoop]: Abstraction has has 176 places, 200 transitions, 2663 flow [2024-11-13 14:41:08,388 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 5.0) internal successors, (50), 10 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-13 14:41:08,388 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-13 14:41:08,388 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-13 14:41:08,408 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44d2f74b-8f25-498a-b792-4268e6d41a37/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Ended with exit code 0 [2024-11-13 14:41:08,588 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44d2f74b-8f25-498a-b792-4268e6d41a37/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-13 14:41:08,589 INFO L396 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-11-13 14:41:08,589 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-13 14:41:08,589 INFO L85 PathProgramCache]: Analyzing trace with hash 167211108, now seen corresponding path program 8 times [2024-11-13 14:41:08,589 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2024-11-13 14:41:08,589 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [679946017] [2024-11-13 14:41:08,589 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-13 14:41:08,590 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-13 14:41:08,590 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44d2f74b-8f25-498a-b792-4268e6d41a37/bin/uautomizer-verify-qhAvR1uOyd/z3 [2024-11-13 14:41:08,592 INFO L229 MonitoredProcess]: Starting monitored process 21 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44d2f74b-8f25-498a-b792-4268e6d41a37/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-13 14:41:08,593 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44d2f74b-8f25-498a-b792-4268e6d41a37/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2024-11-13 14:41:08,685 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-13 14:41:08,686 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-13 14:41:08,689 INFO L255 TraceCheckSpWp]: Trace formula consists of 83 conjuncts, 24 conjuncts are in the unsatisfiable core [2024-11-13 14:41:08,691 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-13 14:41:08,782 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 [2024-11-13 14:41:09,372 INFO L349 Elim1Store]: treesize reduction 22, result has 24.1 percent of original size [2024-11-13 14:41:09,372 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 121 treesize of output 104 [2024-11-13 14:41:09,498 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-13 14:41:09,498 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-13 14:41:14,265 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 140 treesize of output 124 [2024-11-13 14:41:14,941 INFO L349 Elim1Store]: treesize reduction 5, result has 95.7 percent of original size [2024-11-13 14:41:14,941 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 7 new quantified variables, introduced 10 case distinctions, treesize of input 618 treesize of output 529 [2024-11-13 14:41:38,667 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-13 14:41:38,667 INFO L136 FreeRefinementEngine]: Strategy FOX found an infeasible trace [2024-11-13 14:41:38,667 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [679946017] [2024-11-13 14:41:38,667 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [679946017] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-13 14:41:38,667 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-11-13 14:41:38,667 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2024-11-13 14:41:38,667 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1572817846] [2024-11-13 14:41:38,667 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-11-13 14:41:38,668 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2024-11-13 14:41:38,668 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FOX [2024-11-13 14:41:38,669 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2024-11-13 14:41:38,669 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=161, Unknown=0, NotChecked=0, Total=240 [2024-11-13 14:41:38,669 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 20 [2024-11-13 14:41:38,669 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 176 places, 200 transitions, 2663 flow. Second operand has 16 states, 16 states have (on average 5.0) internal successors, (80), 16 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) [2024-11-13 14:41:38,670 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-13 14:41:38,670 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 20 [2024-11-13 14:41:38,670 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-13 14:41:58,589 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2024-11-13 14:42:03,048 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2024-11-13 14:42:10,895 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2024-11-13 14:42:12,278 INFO L124 PetriNetUnfolderBase]: 992/1783 cut-off events. [2024-11-13 14:42:12,279 INFO L125 PetriNetUnfolderBase]: For 13661/13661 co-relation queries the response was YES. [2024-11-13 14:42:12,287 INFO L83 FinitePrefix]: Finished finitePrefix Result has 11037 conditions, 1783 events. 992/1783 cut-off events. For 13661/13661 co-relation queries the response was YES. Maximal size of possible extension queue 160. Compared 10201 event pairs, 56 based on Foata normal form. 10/1757 useless extension candidates. Maximal degree in co-relation 10892. Up to 768 conditions per place. [2024-11-13 14:42:12,293 INFO L140 encePairwiseOnDemand]: 12/20 looper letters, 212 selfloop transitions, 51 changer transitions 192/456 dead transitions. [2024-11-13 14:42:12,293 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 193 places, 456 transitions, 6614 flow [2024-11-13 14:42:12,295 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2024-11-13 14:42:12,295 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2024-11-13 14:42:12,296 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 176 transitions. [2024-11-13 14:42:12,296 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.4888888888888889 [2024-11-13 14:42:12,296 INFO L175 Difference]: Start difference. First operand has 176 places, 200 transitions, 2663 flow. Second operand 18 states and 176 transitions. [2024-11-13 14:42:12,296 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 193 places, 456 transitions, 6614 flow [2024-11-13 14:42:12,435 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 185 places, 456 transitions, 6300 flow, removed 16 selfloop flow, removed 8 redundant places. [2024-11-13 14:42:12,441 INFO L231 Difference]: Finished difference. Result has 194 places, 224 transitions, 3015 flow [2024-11-13 14:42:12,441 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=20, PETRI_DIFFERENCE_MINUEND_FLOW=2513, PETRI_DIFFERENCE_MINUEND_PLACES=168, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=200, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=31, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=160, PETRI_DIFFERENCE_SUBTRAHEND_STATES=18, PETRI_FLOW=3015, PETRI_PLACES=194, PETRI_TRANSITIONS=224} [2024-11-13 14:42:12,442 INFO L277 CegarLoopForPetriNet]: 21 programPoint places, 173 predicate places. [2024-11-13 14:42:12,442 INFO L471 AbstractCegarLoop]: Abstraction has has 194 places, 224 transitions, 3015 flow [2024-11-13 14:42:12,442 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 5.0) internal successors, (80), 16 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) [2024-11-13 14:42:12,442 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-13 14:42:12,442 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-13 14:42:12,458 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44d2f74b-8f25-498a-b792-4268e6d41a37/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Ended with exit code 0 [2024-11-13 14:42:12,642 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44d2f74b-8f25-498a-b792-4268e6d41a37/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-13 14:42:12,643 INFO L396 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-11-13 14:42:12,643 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-13 14:42:12,643 INFO L85 PathProgramCache]: Analyzing trace with hash -1070899656, now seen corresponding path program 9 times [2024-11-13 14:42:12,643 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2024-11-13 14:42:12,643 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1157302638] [2024-11-13 14:42:12,643 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-13 14:42:12,644 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-13 14:42:12,644 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44d2f74b-8f25-498a-b792-4268e6d41a37/bin/uautomizer-verify-qhAvR1uOyd/z3 [2024-11-13 14:42:12,645 INFO L229 MonitoredProcess]: Starting monitored process 22 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44d2f74b-8f25-498a-b792-4268e6d41a37/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-13 14:42:12,647 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44d2f74b-8f25-498a-b792-4268e6d41a37/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2024-11-13 14:42:12,742 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2024-11-13 14:42:12,743 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-13 14:42:12,745 INFO L255 TraceCheckSpWp]: Trace formula consists of 83 conjuncts, 24 conjuncts are in the unsatisfiable core [2024-11-13 14:42:12,748 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-13 14:42:12,837 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 [2024-11-13 14:42:13,386 INFO L349 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2024-11-13 14:42:13,386 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 41 treesize of output 21 [2024-11-13 14:42:13,461 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-13 14:42:13,461 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-13 14:42:16,757 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 140 treesize of output 124 [2024-11-13 14:42:17,730 INFO L349 Elim1Store]: treesize reduction 5, result has 95.7 percent of original size [2024-11-13 14:42:17,731 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 7 new quantified variables, introduced 10 case distinctions, treesize of input 661 treesize of output 602 [2024-11-13 14:42:46,578 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-13 14:42:46,578 INFO L136 FreeRefinementEngine]: Strategy FOX found an infeasible trace [2024-11-13 14:42:46,578 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1157302638] [2024-11-13 14:42:46,579 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1157302638] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-13 14:42:46,579 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-11-13 14:42:46,579 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2024-11-13 14:42:46,579 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1088014193] [2024-11-13 14:42:46,579 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-11-13 14:42:46,579 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2024-11-13 14:42:46,579 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FOX [2024-11-13 14:42:46,580 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2024-11-13 14:42:46,580 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=165, Unknown=0, NotChecked=0, Total=240 [2024-11-13 14:42:46,580 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 20 [2024-11-13 14:42:46,581 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 194 places, 224 transitions, 3015 flow. Second operand has 16 states, 16 states have (on average 5.0) internal successors, (80), 16 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) [2024-11-13 14:42:46,581 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-13 14:42:46,581 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 20 [2024-11-13 14:42:46,581 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-13 14:43:00,600 WARN L286 SmtUtils]: Spent 11.02s on a formula simplification. DAG size of input: 359 DAG size of output: 350 (called from [L 388] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2024-11-13 14:43:07,047 INFO L124 PetriNetUnfolderBase]: 556/1082 cut-off events. [2024-11-13 14:43:07,047 INFO L125 PetriNetUnfolderBase]: For 8226/8226 co-relation queries the response was YES. [2024-11-13 14:43:07,059 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6632 conditions, 1082 events. 556/1082 cut-off events. For 8226/8226 co-relation queries the response was YES. Maximal size of possible extension queue 96. Compared 5855 event pairs, 58 based on Foata normal form. 3/1067 useless extension candidates. Maximal degree in co-relation 6522. Up to 841 conditions per place. [2024-11-13 14:43:07,066 INFO L140 encePairwiseOnDemand]: 12/20 looper letters, 208 selfloop transitions, 46 changer transitions 29/284 dead transitions. [2024-11-13 14:43:07,066 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 208 places, 284 transitions, 3980 flow [2024-11-13 14:43:07,068 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2024-11-13 14:43:07,068 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2024-11-13 14:43:07,069 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 150 transitions. [2024-11-13 14:43:07,070 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.4411764705882353 [2024-11-13 14:43:07,070 INFO L175 Difference]: Start difference. First operand has 194 places, 224 transitions, 3015 flow. Second operand 17 states and 150 transitions. [2024-11-13 14:43:07,070 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 208 places, 284 transitions, 3980 flow [2024-11-13 14:43:07,158 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 204 places, 284 transitions, 3907 flow, removed 32 selfloop flow, removed 4 redundant places. [2024-11-13 14:43:07,165 INFO L231 Difference]: Finished difference. Result has 207 places, 225 transitions, 3044 flow [2024-11-13 14:43:07,166 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=20, PETRI_DIFFERENCE_MINUEND_FLOW=2955, PETRI_DIFFERENCE_MINUEND_PLACES=188, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=224, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=43, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=181, PETRI_DIFFERENCE_SUBTRAHEND_STATES=17, PETRI_FLOW=3044, PETRI_PLACES=207, PETRI_TRANSITIONS=225} [2024-11-13 14:43:07,166 INFO L277 CegarLoopForPetriNet]: 21 programPoint places, 186 predicate places. [2024-11-13 14:43:07,167 INFO L471 AbstractCegarLoop]: Abstraction has has 207 places, 225 transitions, 3044 flow [2024-11-13 14:43:07,168 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 5.0) internal successors, (80), 16 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) [2024-11-13 14:43:07,168 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-13 14:43:07,168 INFO L204 CegarLoopForPetriNet]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-13 14:43:07,195 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44d2f74b-8f25-498a-b792-4268e6d41a37/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Ended with exit code 0 [2024-11-13 14:43:07,368 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44d2f74b-8f25-498a-b792-4268e6d41a37/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-13 14:43:07,369 INFO L396 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-11-13 14:43:07,370 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-13 14:43:07,370 INFO L85 PathProgramCache]: Analyzing trace with hash 52736316, now seen corresponding path program 10 times [2024-11-13 14:43:07,370 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2024-11-13 14:43:07,371 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1490377054] [2024-11-13 14:43:07,371 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-11-13 14:43:07,371 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-13 14:43:07,371 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44d2f74b-8f25-498a-b792-4268e6d41a37/bin/uautomizer-verify-qhAvR1uOyd/z3 [2024-11-13 14:43:07,373 INFO L229 MonitoredProcess]: Starting monitored process 23 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44d2f74b-8f25-498a-b792-4268e6d41a37/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-13 14:43:07,377 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44d2f74b-8f25-498a-b792-4268e6d41a37/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2024-11-13 14:43:07,496 INFO L227 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-11-13 14:43:07,496 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-13 14:43:07,499 INFO L255 TraceCheckSpWp]: Trace formula consists of 87 conjuncts, 7 conjuncts are in the unsatisfiable core [2024-11-13 14:43:07,500 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-13 14:43:07,626 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-13 14:43:07,626 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-13 14:43:08,113 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-13 14:43:08,113 INFO L136 FreeRefinementEngine]: Strategy FOX found an infeasible trace [2024-11-13 14:43:08,113 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1490377054] [2024-11-13 14:43:08,114 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1490377054] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-13 14:43:08,114 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-11-13 14:43:08,114 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 12 [2024-11-13 14:43:08,114 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [581709818] [2024-11-13 14:43:08,114 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-11-13 14:43:08,114 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-11-13 14:43:08,114 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FOX [2024-11-13 14:43:08,115 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-11-13 14:43:08,115 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=97, Unknown=0, NotChecked=0, Total=132 [2024-11-13 14:43:08,115 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 20 [2024-11-13 14:43:08,115 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 207 places, 225 transitions, 3044 flow. Second operand has 12 states, 12 states have (on average 5.166666666666667) internal successors, (62), 12 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) [2024-11-13 14:43:08,115 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-13 14:43:08,115 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 20 [2024-11-13 14:43:08,116 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-13 14:43:11,416 INFO L124 PetriNetUnfolderBase]: 636/1223 cut-off events. [2024-11-13 14:43:11,416 INFO L125 PetriNetUnfolderBase]: For 9847/9847 co-relation queries the response was YES. [2024-11-13 14:43:11,423 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7524 conditions, 1223 events. 636/1223 cut-off events. For 9847/9847 co-relation queries the response was YES. Maximal size of possible extension queue 111. Compared 6896 event pairs, 58 based on Foata normal form. 6/1206 useless extension candidates. Maximal degree in co-relation 7413. Up to 249 conditions per place. [2024-11-13 14:43:11,428 INFO L140 encePairwiseOnDemand]: 14/20 looper letters, 222 selfloop transitions, 120 changer transitions 5/348 dead transitions. [2024-11-13 14:43:11,428 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 223 places, 348 transitions, 4745 flow [2024-11-13 14:43:11,430 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2024-11-13 14:43:11,430 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2024-11-13 14:43:11,430 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 179 transitions. [2024-11-13 14:43:11,431 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.4261904761904762 [2024-11-13 14:43:11,431 INFO L175 Difference]: Start difference. First operand has 207 places, 225 transitions, 3044 flow. Second operand 21 states and 179 transitions. [2024-11-13 14:43:11,431 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 223 places, 348 transitions, 4745 flow [2024-11-13 14:43:11,510 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 211 places, 348 transitions, 4675 flow, removed 12 selfloop flow, removed 12 redundant places. [2024-11-13 14:43:11,515 INFO L231 Difference]: Finished difference. Result has 215 places, 247 transitions, 3583 flow [2024-11-13 14:43:11,515 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=20, PETRI_DIFFERENCE_MINUEND_FLOW=2982, PETRI_DIFFERENCE_MINUEND_PLACES=191, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=225, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=102, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=120, PETRI_DIFFERENCE_SUBTRAHEND_STATES=21, PETRI_FLOW=3583, PETRI_PLACES=215, PETRI_TRANSITIONS=247} [2024-11-13 14:43:11,516 INFO L277 CegarLoopForPetriNet]: 21 programPoint places, 194 predicate places. [2024-11-13 14:43:11,516 INFO L471 AbstractCegarLoop]: Abstraction has has 215 places, 247 transitions, 3583 flow [2024-11-13 14:43:11,516 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 5.166666666666667) internal successors, (62), 12 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) [2024-11-13 14:43:11,516 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-13 14:43:11,516 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-13 14:43:11,534 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44d2f74b-8f25-498a-b792-4268e6d41a37/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Ended with exit code 0 [2024-11-13 14:43:11,717 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 23 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44d2f74b-8f25-498a-b792-4268e6d41a37/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-13 14:43:11,717 INFO L396 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-11-13 14:43:11,717 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-13 14:43:11,718 INFO L85 PathProgramCache]: Analyzing trace with hash 134463570, now seen corresponding path program 5 times [2024-11-13 14:43:11,718 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2024-11-13 14:43:11,718 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1006215646] [2024-11-13 14:43:11,718 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-11-13 14:43:11,718 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-13 14:43:11,718 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44d2f74b-8f25-498a-b792-4268e6d41a37/bin/uautomizer-verify-qhAvR1uOyd/z3 [2024-11-13 14:43:11,720 INFO L229 MonitoredProcess]: Starting monitored process 24 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44d2f74b-8f25-498a-b792-4268e6d41a37/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-13 14:43:11,722 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44d2f74b-8f25-498a-b792-4268e6d41a37/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Waiting until timeout for monitored process [2024-11-13 14:43:11,836 INFO L227 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-13 14:43:11,836 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-13 14:43:11,840 INFO L255 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 6 conjuncts are in the unsatisfiable core [2024-11-13 14:43:11,841 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-13 14:43:11,965 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-11-13 14:43:11,965 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-13 14:43:12,184 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-11-13 14:43:12,184 INFO L136 FreeRefinementEngine]: Strategy FOX found an infeasible trace [2024-11-13 14:43:12,184 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1006215646] [2024-11-13 14:43:12,184 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1006215646] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-13 14:43:12,184 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-11-13 14:43:12,185 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 12 [2024-11-13 14:43:12,185 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1559500160] [2024-11-13 14:43:12,185 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-11-13 14:43:12,185 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-11-13 14:43:12,185 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FOX [2024-11-13 14:43:12,186 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-11-13 14:43:12,186 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=94, Unknown=0, NotChecked=0, Total=132 [2024-11-13 14:43:12,186 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 20 [2024-11-13 14:43:12,186 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 215 places, 247 transitions, 3583 flow. Second operand has 12 states, 12 states have (on average 4.916666666666667) internal successors, (59), 12 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-13 14:43:12,186 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-13 14:43:12,186 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 20 [2024-11-13 14:43:12,187 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-13 14:43:14,129 INFO L124 PetriNetUnfolderBase]: 632/1225 cut-off events. [2024-11-13 14:43:14,129 INFO L125 PetriNetUnfolderBase]: For 10794/10794 co-relation queries the response was YES. [2024-11-13 14:43:14,136 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7851 conditions, 1225 events. 632/1225 cut-off events. For 10794/10794 co-relation queries the response was YES. Maximal size of possible extension queue 111. Compared 6880 event pairs, 150 based on Foata normal form. 9/1211 useless extension candidates. Maximal degree in co-relation 7736. Up to 548 conditions per place. [2024-11-13 14:43:14,142 INFO L140 encePairwiseOnDemand]: 14/20 looper letters, 218 selfloop transitions, 98 changer transitions 0/317 dead transitions. [2024-11-13 14:43:14,142 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 230 places, 317 transitions, 4546 flow [2024-11-13 14:43:14,143 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2024-11-13 14:43:14,143 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2024-11-13 14:43:14,144 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 134 transitions. [2024-11-13 14:43:14,144 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.41875 [2024-11-13 14:43:14,144 INFO L175 Difference]: Start difference. First operand has 215 places, 247 transitions, 3583 flow. Second operand 16 states and 134 transitions. [2024-11-13 14:43:14,144 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 230 places, 317 transitions, 4546 flow [2024-11-13 14:43:14,258 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 222 places, 317 transitions, 4311 flow, removed 96 selfloop flow, removed 8 redundant places. [2024-11-13 14:43:14,264 INFO L231 Difference]: Finished difference. Result has 228 places, 256 transitions, 3668 flow [2024-11-13 14:43:14,265 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=20, PETRI_DIFFERENCE_MINUEND_FLOW=3348, PETRI_DIFFERENCE_MINUEND_PLACES=207, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=247, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=89, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=150, PETRI_DIFFERENCE_SUBTRAHEND_STATES=16, PETRI_FLOW=3668, PETRI_PLACES=228, PETRI_TRANSITIONS=256} [2024-11-13 14:43:14,266 INFO L277 CegarLoopForPetriNet]: 21 programPoint places, 207 predicate places. [2024-11-13 14:43:14,266 INFO L471 AbstractCegarLoop]: Abstraction has has 228 places, 256 transitions, 3668 flow [2024-11-13 14:43:14,266 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 4.916666666666667) internal successors, (59), 12 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-13 14:43:14,266 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-13 14:43:14,266 INFO L204 CegarLoopForPetriNet]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-13 14:43:14,295 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44d2f74b-8f25-498a-b792-4268e6d41a37/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Ended with exit code 0 [2024-11-13 14:43:14,467 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44d2f74b-8f25-498a-b792-4268e6d41a37/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-13 14:43:14,467 INFO L396 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-11-13 14:43:14,468 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-13 14:43:14,468 INFO L85 PathProgramCache]: Analyzing trace with hash 833798960, now seen corresponding path program 11 times [2024-11-13 14:43:14,468 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2024-11-13 14:43:14,468 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [535044635] [2024-11-13 14:43:14,468 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-11-13 14:43:14,468 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-13 14:43:14,468 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44d2f74b-8f25-498a-b792-4268e6d41a37/bin/uautomizer-verify-qhAvR1uOyd/z3 [2024-11-13 14:43:14,470 INFO L229 MonitoredProcess]: Starting monitored process 25 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44d2f74b-8f25-498a-b792-4268e6d41a37/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-13 14:43:14,472 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44d2f74b-8f25-498a-b792-4268e6d41a37/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Waiting until timeout for monitored process [2024-11-13 14:43:14,584 INFO L227 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2024-11-13 14:43:14,584 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-13 14:43:14,588 INFO L255 TraceCheckSpWp]: Trace formula consists of 87 conjuncts, 7 conjuncts are in the unsatisfiable core [2024-11-13 14:43:14,588 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-13 14:43:14,752 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-13 14:43:14,752 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-13 14:43:15,111 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-13 14:43:15,111 INFO L136 FreeRefinementEngine]: Strategy FOX found an infeasible trace [2024-11-13 14:43:15,111 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [535044635] [2024-11-13 14:43:15,111 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [535044635] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-13 14:43:15,111 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-11-13 14:43:15,111 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 11 [2024-11-13 14:43:15,112 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [10136738] [2024-11-13 14:43:15,112 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-11-13 14:43:15,112 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-11-13 14:43:15,112 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FOX [2024-11-13 14:43:15,112 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-11-13 14:43:15,113 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=82, Unknown=0, NotChecked=0, Total=110 [2024-11-13 14:43:15,113 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 20 [2024-11-13 14:43:15,113 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 228 places, 256 transitions, 3668 flow. Second operand has 11 states, 11 states have (on average 5.0) internal successors, (55), 11 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-13 14:43:15,113 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-13 14:43:15,113 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 20 [2024-11-13 14:43:15,113 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-13 14:43:17,008 INFO L124 PetriNetUnfolderBase]: 639/1231 cut-off events. [2024-11-13 14:43:17,008 INFO L125 PetriNetUnfolderBase]: For 11190/11190 co-relation queries the response was YES. [2024-11-13 14:43:17,015 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7998 conditions, 1231 events. 639/1231 cut-off events. For 11190/11190 co-relation queries the response was YES. Maximal size of possible extension queue 115. Compared 6949 event pairs, 110 based on Foata normal form. 6/1236 useless extension candidates. Maximal degree in co-relation 7878. Up to 595 conditions per place. [2024-11-13 14:43:17,021 INFO L140 encePairwiseOnDemand]: 14/20 looper letters, 212 selfloop transitions, 102 changer transitions 6/321 dead transitions. [2024-11-13 14:43:17,022 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 243 places, 321 transitions, 4858 flow [2024-11-13 14:43:17,023 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2024-11-13 14:43:17,024 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2024-11-13 14:43:17,024 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 134 transitions. [2024-11-13 14:43:17,025 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.3941176470588235 [2024-11-13 14:43:17,025 INFO L175 Difference]: Start difference. First operand has 228 places, 256 transitions, 3668 flow. Second operand 17 states and 134 transitions. [2024-11-13 14:43:17,025 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 243 places, 321 transitions, 4858 flow [2024-11-13 14:43:17,137 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 234 places, 321 transitions, 4666 flow, removed 7 selfloop flow, removed 9 redundant places. [2024-11-13 14:43:17,144 INFO L231 Difference]: Finished difference. Result has 239 places, 265 transitions, 3950 flow [2024-11-13 14:43:17,144 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=20, PETRI_DIFFERENCE_MINUEND_FLOW=3423, PETRI_DIFFERENCE_MINUEND_PLACES=218, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=252, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=86, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=164, PETRI_DIFFERENCE_SUBTRAHEND_STATES=17, PETRI_FLOW=3950, PETRI_PLACES=239, PETRI_TRANSITIONS=265} [2024-11-13 14:43:17,145 INFO L277 CegarLoopForPetriNet]: 21 programPoint places, 218 predicate places. [2024-11-13 14:43:17,146 INFO L471 AbstractCegarLoop]: Abstraction has has 239 places, 265 transitions, 3950 flow [2024-11-13 14:43:17,146 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 5.0) internal successors, (55), 11 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-13 14:43:17,146 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-13 14:43:17,146 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-13 14:43:17,173 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44d2f74b-8f25-498a-b792-4268e6d41a37/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Forceful destruction successful, exit code 0 [2024-11-13 14:43:17,347 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 25 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44d2f74b-8f25-498a-b792-4268e6d41a37/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-13 14:43:17,347 INFO L396 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-11-13 14:43:17,348 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-13 14:43:17,348 INFO L85 PathProgramCache]: Analyzing trace with hash -350729992, now seen corresponding path program 12 times [2024-11-13 14:43:17,348 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2024-11-13 14:43:17,349 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2092884260] [2024-11-13 14:43:17,349 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2024-11-13 14:43:17,349 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-13 14:43:17,349 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44d2f74b-8f25-498a-b792-4268e6d41a37/bin/uautomizer-verify-qhAvR1uOyd/z3 [2024-11-13 14:43:17,352 INFO L229 MonitoredProcess]: Starting monitored process 26 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44d2f74b-8f25-498a-b792-4268e6d41a37/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-13 14:43:17,355 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44d2f74b-8f25-498a-b792-4268e6d41a37/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Waiting until timeout for monitored process [2024-11-13 14:43:17,490 INFO L227 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2024-11-13 14:43:17,490 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-13 14:43:17,493 INFO L255 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 28 conjuncts are in the unsatisfiable core [2024-11-13 14:43:17,497 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-13 14:43:17,591 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 [2024-11-13 14:43:17,682 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 [2024-11-13 14:43:18,383 INFO L349 Elim1Store]: treesize reduction 15, result has 48.3 percent of original size [2024-11-13 14:43:18,384 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 121 treesize of output 111 [2024-11-13 14:43:18,500 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-13 14:43:18,500 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-13 14:43:23,380 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 204 treesize of output 188 [2024-11-13 14:43:24,934 INFO L349 Elim1Store]: treesize reduction 5, result has 97.2 percent of original size [2024-11-13 14:43:24,934 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 32514 treesize of output 21661