./Ultimate.py --spec ../../sv-benchmarks/c/properties/valid-memsafety.prp --file ../../sv-benchmarks/c/weaver/popl20-more-buffer-series.wvr.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for memory safety (deref-memtrack) Using default analysis Version 826ab2ba Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dc9b1bd9-e2b0-426c-b6c3-75a34a205e4c/bin/uautomizer-verify-qhAvR1uOyd/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dc9b1bd9-e2b0-426c-b6c3-75a34a205e4c/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_dc9b1bd9-e2b0-426c-b6c3-75a34a205e4c/bin/uautomizer-verify-qhAvR1uOyd/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dc9b1bd9-e2b0-426c-b6c3-75a34a205e4c/bin/uautomizer-verify-qhAvR1uOyd/config/AutomizerMemDerefMemtrack.xml -i ../../sv-benchmarks/c/weaver/popl20-more-buffer-series.wvr.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dc9b1bd9-e2b0-426c-b6c3-75a34a205e4c/bin/uautomizer-verify-qhAvR1uOyd/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dc9b1bd9-e2b0-426c-b6c3-75a34a205e4c/bin/uautomizer-verify-qhAvR1uOyd --witnessprinter.witness.filename witness --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 8dbd267b0e0821e8d358e8d234024d8e484ea32431972ed8b70b87052179a50c --- Real Ultimate output --- This is Ultimate 0.3.0-dev-826ab2b [2024-11-13 15:21:53,883 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-11-13 15:21:53,969 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dc9b1bd9-e2b0-426c-b6c3-75a34a205e4c/bin/uautomizer-verify-qhAvR1uOyd/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2024-11-13 15:21:53,977 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-11-13 15:21:53,978 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-11-13 15:21:54,010 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-11-13 15:21:54,012 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-11-13 15:21:54,012 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-11-13 15:21:54,013 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-11-13 15:21:54,013 INFO L153 SettingsManager]: * Use memory slicer=true [2024-11-13 15:21:54,013 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-11-13 15:21:54,014 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-11-13 15:21:54,014 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-11-13 15:21:54,014 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-11-13 15:21:54,015 INFO L153 SettingsManager]: * Use SBE=true [2024-11-13 15:21:54,015 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-11-13 15:21:54,015 INFO L153 SettingsManager]: * sizeof long=4 [2024-11-13 15:21:54,015 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-11-13 15:21:54,015 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-11-13 15:21:54,016 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-11-13 15:21:54,016 INFO L153 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2024-11-13 15:21:54,016 INFO L153 SettingsManager]: * Bitprecise bitfields=true [2024-11-13 15:21:54,016 INFO L153 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2024-11-13 15:21:54,016 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-11-13 15:21:54,016 INFO L153 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2024-11-13 15:21:54,017 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-11-13 15:21:54,017 INFO L153 SettingsManager]: * Check unreachability of reach_error function=false [2024-11-13 15:21:54,017 INFO L153 SettingsManager]: * sizeof long double=12 [2024-11-13 15:21:54,017 INFO L153 SettingsManager]: * Use constant arrays=true [2024-11-13 15:21:54,017 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-11-13 15:21:54,017 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-11-13 15:21:54,018 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-11-13 15:21:54,018 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-11-13 15:21:54,018 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-11-13 15:21:54,018 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-11-13 15:21:54,019 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-11-13 15:21:54,019 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-11-13 15:21:54,019 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-11-13 15:21:54,019 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-11-13 15:21:54,019 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-11-13 15:21:54,020 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-11-13 15:21:54,020 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-11-13 15:21:54,020 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_dc9b1bd9-e2b0-426c-b6c3-75a34a205e4c/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 valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) 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 -> 8dbd267b0e0821e8d358e8d234024d8e484ea32431972ed8b70b87052179a50c [2024-11-13 15:21:54,304 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-11-13 15:21:54,314 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-11-13 15:21:54,316 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-11-13 15:21:54,317 INFO L270 PluginConnector]: Initializing CDTParser... [2024-11-13 15:21:54,317 INFO L274 PluginConnector]: CDTParser initialized [2024-11-13 15:21:54,319 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dc9b1bd9-e2b0-426c-b6c3-75a34a205e4c/bin/uautomizer-verify-qhAvR1uOyd/../../sv-benchmarks/c/weaver/popl20-more-buffer-series.wvr.c Unable to find full path for "g++" [2024-11-13 15:21:56,143 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-11-13 15:21:56,387 INFO L384 CDTParser]: Found 1 translation units. [2024-11-13 15:21:56,388 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dc9b1bd9-e2b0-426c-b6c3-75a34a205e4c/sv-benchmarks/c/weaver/popl20-more-buffer-series.wvr.c [2024-11-13 15:21:56,402 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dc9b1bd9-e2b0-426c-b6c3-75a34a205e4c/bin/uautomizer-verify-qhAvR1uOyd/data/857a38c6c/db4f1829f49a484298d889c02e1d240b/FLAGbc8e245e4 [2024-11-13 15:21:56,427 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dc9b1bd9-e2b0-426c-b6c3-75a34a205e4c/bin/uautomizer-verify-qhAvR1uOyd/data/857a38c6c/db4f1829f49a484298d889c02e1d240b [2024-11-13 15:21:56,429 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-11-13 15:21:56,432 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2024-11-13 15:21:56,435 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-11-13 15:21:56,436 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-11-13 15:21:56,440 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-11-13 15:21:56,441 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.11 03:21:56" (1/1) ... [2024-11-13 15:21:56,445 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@5142458d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 03:21:56, skipping insertion in model container [2024-11-13 15:21:56,445 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.11 03:21:56" (1/1) ... [2024-11-13 15:21:56,471 INFO L175 MainTranslator]: Built tables and reachable declarations [2024-11-13 15:21:56,707 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 15:21:56,711 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-13 15:21:56,723 INFO L200 MainTranslator]: Completed pre-run [2024-11-13 15:21:56,778 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-13 15:21:56,799 INFO L204 MainTranslator]: Completed translation [2024-11-13 15:21:56,800 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 03:21:56 WrapperNode [2024-11-13 15:21:56,800 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-11-13 15:21:56,802 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-11-13 15:21:56,802 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-11-13 15:21:56,803 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-11-13 15:21:56,810 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 03:21:56" (1/1) ... [2024-11-13 15:21:56,825 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 03:21:56" (1/1) ... [2024-11-13 15:21:56,868 INFO L138 Inliner]: procedures = 26, calls = 68, calls flagged for inlining = 23, calls inlined = 29, statements flattened = 335 [2024-11-13 15:21:56,872 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-11-13 15:21:56,873 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-11-13 15:21:56,873 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-11-13 15:21:56,873 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-11-13 15:21:56,883 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 03:21:56" (1/1) ... [2024-11-13 15:21:56,883 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 03:21:56" (1/1) ... [2024-11-13 15:21:56,887 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 03:21:56" (1/1) ... [2024-11-13 15:21:56,911 INFO L175 MemorySlicer]: Split 12 memory accesses to 2 slices as follows [2, 10]. 83 percent of accesses are in the largest equivalence class. The 2 initializations are split as follows [2, 0]. The 3 writes are split as follows [0, 3]. [2024-11-13 15:21:56,912 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 03:21:56" (1/1) ... [2024-11-13 15:21:56,912 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 03:21:56" (1/1) ... [2024-11-13 15:21:56,922 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 03:21:56" (1/1) ... [2024-11-13 15:21:56,927 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 03:21:56" (1/1) ... [2024-11-13 15:21:56,929 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 03:21:56" (1/1) ... [2024-11-13 15:21:56,931 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 03:21:56" (1/1) ... [2024-11-13 15:21:56,934 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-11-13 15:21:56,935 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-11-13 15:21:56,935 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-11-13 15:21:56,935 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-11-13 15:21:56,936 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 03:21:56" (1/1) ... [2024-11-13 15:21:56,942 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-11-13 15:21:56,955 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dc9b1bd9-e2b0-426c-b6c3-75a34a205e4c/bin/uautomizer-verify-qhAvR1uOyd/z3 [2024-11-13 15:21:56,971 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dc9b1bd9-e2b0-426c-b6c3-75a34a205e4c/bin/uautomizer-verify-qhAvR1uOyd/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (exit command is (exit), workingDir is null) [2024-11-13 15:21:56,978 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dc9b1bd9-e2b0-426c-b6c3-75a34a205e4c/bin/uautomizer-verify-qhAvR1uOyd/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Waiting until timeout for monitored process [2024-11-13 15:21:57,000 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-11-13 15:21:57,001 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#0 [2024-11-13 15:21:57,001 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#1 [2024-11-13 15:21:57,001 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#0 [2024-11-13 15:21:57,001 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#1 [2024-11-13 15:21:57,001 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2024-11-13 15:21:57,001 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2024-11-13 15:21:57,001 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2024-11-13 15:21:57,001 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2024-11-13 15:21:57,002 INFO L130 BoogieDeclarations]: Found specification of procedure thread3 [2024-11-13 15:21:57,002 INFO L138 BoogieDeclarations]: Found implementation of procedure thread3 [2024-11-13 15:21:57,002 INFO L130 BoogieDeclarations]: Found specification of procedure thread4 [2024-11-13 15:21:57,002 INFO L138 BoogieDeclarations]: Found implementation of procedure thread4 [2024-11-13 15:21:57,002 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-11-13 15:21:57,002 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#1 [2024-11-13 15:21:57,002 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2024-11-13 15:21:57,002 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2024-11-13 15:21:57,002 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2024-11-13 15:21:57,003 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-11-13 15:21:57,003 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-11-13 15:21:57,004 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 15:21:57,140 INFO L238 CfgBuilder]: Building ICFG [2024-11-13 15:21:57,142 INFO L264 CfgBuilder]: Building CFG for each procedure with an implementation [2024-11-13 15:21:57,852 INFO L283 CfgBuilder]: Omitted future-live optimization because the input is a concurrent program. [2024-11-13 15:21:57,853 INFO L287 CfgBuilder]: Performing block encoding [2024-11-13 15:21:58,595 INFO L311 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-11-13 15:21:58,596 INFO L316 CfgBuilder]: Removed 7 assume(true) statements. [2024-11-13 15:21:58,596 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.11 03:21:58 BoogieIcfgContainer [2024-11-13 15:21:58,596 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-11-13 15:21:58,599 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-11-13 15:21:58,600 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-11-13 15:21:58,605 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-11-13 15:21:58,605 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 13.11 03:21:56" (1/3) ... [2024-11-13 15:21:58,606 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3831454a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.11 03:21:58, skipping insertion in model container [2024-11-13 15:21:58,606 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 03:21:56" (2/3) ... [2024-11-13 15:21:58,606 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3831454a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.11 03:21:58, skipping insertion in model container [2024-11-13 15:21:58,606 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.11 03:21:58" (3/3) ... [2024-11-13 15:21:58,608 INFO L112 eAbstractionObserver]: Analyzing ICFG popl20-more-buffer-series.wvr.c [2024-11-13 15:21:58,625 INFO L217 ceAbstractionStarter]: Automizer settings: Hoare:None NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-11-13 15:21:58,627 INFO L154 ceAbstractionStarter]: Applying trace abstraction to ICFG popl20-more-buffer-series.wvr.c that has 5 procedures, 71 locations, 1 initial locations, 7 loop locations, and 22 error locations. [2024-11-13 15:21:58,627 INFO L492 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2024-11-13 15:21:58,749 INFO L143 ThreadInstanceAdder]: Constructed 4 joinOtherThreadTransitions. [2024-11-13 15:21:58,789 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 83 places, 77 transitions, 182 flow [2024-11-13 15:21:58,857 INFO L124 PetriNetUnfolderBase]: 7/73 cut-off events. [2024-11-13 15:21:58,861 INFO L125 PetriNetUnfolderBase]: For 4/4 co-relation queries the response was YES. [2024-11-13 15:21:58,866 INFO L83 FinitePrefix]: Finished finitePrefix Result has 90 conditions, 73 events. 7/73 cut-off events. For 4/4 co-relation queries the response was YES. Maximal size of possible extension queue 11. Compared 199 event pairs, 0 based on Foata normal form. 0/44 useless extension candidates. Maximal degree in co-relation 60. Up to 2 conditions per place. [2024-11-13 15:21:58,868 INFO L82 GeneralOperation]: Start removeDead. Operand has 83 places, 77 transitions, 182 flow [2024-11-13 15:21:58,873 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 78 places, 72 transitions, 168 flow [2024-11-13 15:21:58,887 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-11-13 15:21:58,905 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=None, 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;@2850092d, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-11-13 15:21:58,907 INFO L334 AbstractCegarLoop]: Starting to check reachability of 40 error locations. [2024-11-13 15:21:58,912 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2024-11-13 15:21:58,912 INFO L124 PetriNetUnfolderBase]: 1/4 cut-off events. [2024-11-13 15:21:58,913 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-11-13 15:21:58,913 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-13 15:21:58,913 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2024-11-13 15:21:58,914 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 37 more)] === [2024-11-13 15:21:58,919 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-13 15:21:58,919 INFO L85 PathProgramCache]: Analyzing trace with hash 1030259, now seen corresponding path program 1 times [2024-11-13 15:21:58,927 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-13 15:21:58,927 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1322300384] [2024-11-13 15:21:58,928 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-13 15:21:58,928 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-13 15:21:59,040 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 15:21:59,231 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 15:21:59,232 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-13 15:21:59,232 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1322300384] [2024-11-13 15:21:59,233 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1322300384] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-13 15:21:59,235 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-13 15:21:59,235 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2024-11-13 15:21:59,237 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1867809194] [2024-11-13 15:21:59,237 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-13 15:21:59,245 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-13 15:21:59,250 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-13 15:21:59,275 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-13 15:21:59,276 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-13 15:21:59,299 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 25 out of 77 [2024-11-13 15:21:59,302 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 78 places, 72 transitions, 168 flow. Second operand has 3 states, 3 states have (on average 26.0) internal successors, (78), 3 states have internal predecessors, (78), 0 states have call successors, (0), 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 15:21:59,306 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-13 15:21:59,306 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 25 of 77 [2024-11-13 15:21:59,307 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-13 15:22:03,264 INFO L124 PetriNetUnfolderBase]: 17936/23922 cut-off events. [2024-11-13 15:22:03,264 INFO L125 PetriNetUnfolderBase]: For 322/322 co-relation queries the response was YES. [2024-11-13 15:22:03,352 INFO L83 FinitePrefix]: Finished finitePrefix Result has 46767 conditions, 23922 events. 17936/23922 cut-off events. For 322/322 co-relation queries the response was YES. Maximal size of possible extension queue 2005. Compared 154735 event pairs, 11530 based on Foata normal form. 1/11174 useless extension candidates. Maximal degree in co-relation 44660. Up to 21814 conditions per place. [2024-11-13 15:22:03,518 INFO L140 encePairwiseOnDemand]: 69/77 looper letters, 43 selfloop transitions, 2 changer transitions 0/65 dead transitions. [2024-11-13 15:22:03,518 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 73 places, 65 transitions, 244 flow [2024-11-13 15:22:03,519 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-13 15:22:03,522 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-11-13 15:22:03,530 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 126 transitions. [2024-11-13 15:22:03,532 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5454545454545454 [2024-11-13 15:22:03,534 INFO L175 Difference]: Start difference. First operand has 78 places, 72 transitions, 168 flow. Second operand 3 states and 126 transitions. [2024-11-13 15:22:03,535 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 73 places, 65 transitions, 244 flow [2024-11-13 15:22:03,726 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 65 places, 65 transitions, 228 flow, removed 0 selfloop flow, removed 8 redundant places. [2024-11-13 15:22:03,732 INFO L231 Difference]: Finished difference. Result has 65 places, 65 transitions, 142 flow [2024-11-13 15:22:03,737 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=77, PETRI_DIFFERENCE_MINUEND_FLOW=138, PETRI_DIFFERENCE_MINUEND_PLACES=63, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=65, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=63, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=142, PETRI_PLACES=65, PETRI_TRANSITIONS=65} [2024-11-13 15:22:03,740 INFO L277 CegarLoopForPetriNet]: 78 programPoint places, -13 predicate places. [2024-11-13 15:22:03,742 INFO L471 AbstractCegarLoop]: Abstraction has has 65 places, 65 transitions, 142 flow [2024-11-13 15:22:03,742 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 26.0) internal successors, (78), 3 states have internal predecessors, (78), 0 states have call successors, (0), 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 15:22:03,742 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-13 15:22:03,742 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2024-11-13 15:22:03,743 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-11-13 15:22:03,743 INFO L396 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 37 more)] === [2024-11-13 15:22:03,743 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-13 15:22:03,744 INFO L85 PathProgramCache]: Analyzing trace with hash 1030260, now seen corresponding path program 1 times [2024-11-13 15:22:03,744 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-13 15:22:03,744 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1011272714] [2024-11-13 15:22:03,745 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-13 15:22:03,745 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-13 15:22:03,801 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 15:22:04,213 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 15:22:04,213 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-13 15:22:04,214 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1011272714] [2024-11-13 15:22:04,214 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1011272714] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-13 15:22:04,214 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-13 15:22:04,214 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-11-13 15:22:04,214 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1636184394] [2024-11-13 15:22:04,215 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-13 15:22:04,216 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-13 15:22:04,216 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-13 15:22:04,218 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-13 15:22:04,218 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-11-13 15:22:04,257 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 25 out of 77 [2024-11-13 15:22:04,258 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 65 places, 65 transitions, 142 flow. Second operand has 4 states, 4 states have (on average 25.75) internal successors, (103), 4 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-13 15:22:04,259 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-13 15:22:04,259 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 25 of 77 [2024-11-13 15:22:04,259 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-13 15:22:06,939 INFO L124 PetriNetUnfolderBase]: 17937/23925 cut-off events. [2024-11-13 15:22:06,940 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-11-13 15:22:06,993 INFO L83 FinitePrefix]: Finished finitePrefix Result has 46151 conditions, 23925 events. 17937/23925 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 2005. Compared 154914 event pairs, 11530 based on Foata normal form. 0/11173 useless extension candidates. Maximal degree in co-relation 46114. Up to 21827 conditions per place. [2024-11-13 15:22:07,099 INFO L140 encePairwiseOnDemand]: 72/77 looper letters, 47 selfloop transitions, 4 changer transitions 0/68 dead transitions. [2024-11-13 15:22:07,099 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 68 places, 68 transitions, 250 flow [2024-11-13 15:22:07,100 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-11-13 15:22:07,100 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-11-13 15:22:07,101 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 152 transitions. [2024-11-13 15:22:07,101 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.4935064935064935 [2024-11-13 15:22:07,101 INFO L175 Difference]: Start difference. First operand has 65 places, 65 transitions, 142 flow. Second operand 4 states and 152 transitions. [2024-11-13 15:22:07,101 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 68 places, 68 transitions, 250 flow [2024-11-13 15:22:07,102 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 66 places, 68 transitions, 246 flow, removed 0 selfloop flow, removed 2 redundant places. [2024-11-13 15:22:07,104 INFO L231 Difference]: Finished difference. Result has 68 places, 68 transitions, 165 flow [2024-11-13 15:22:07,106 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=77, PETRI_DIFFERENCE_MINUEND_FLOW=138, PETRI_DIFFERENCE_MINUEND_PLACES=63, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=65, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=61, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=165, PETRI_PLACES=68, PETRI_TRANSITIONS=68} [2024-11-13 15:22:07,107 INFO L277 CegarLoopForPetriNet]: 78 programPoint places, -10 predicate places. [2024-11-13 15:22:07,108 INFO L471 AbstractCegarLoop]: Abstraction has has 68 places, 68 transitions, 165 flow [2024-11-13 15:22:07,108 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 25.75) internal successors, (103), 4 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-13 15:22:07,108 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-13 15:22:07,108 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1] [2024-11-13 15:22:07,109 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-11-13 15:22:07,109 INFO L396 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 37 more)] === [2024-11-13 15:22:07,109 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-13 15:22:07,109 INFO L85 PathProgramCache]: Analyzing trace with hash 31941367, now seen corresponding path program 1 times [2024-11-13 15:22:07,110 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-13 15:22:07,110 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1881451338] [2024-11-13 15:22:07,110 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-13 15:22:07,110 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-13 15:22:07,154 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 15:22:07,541 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 15:22:07,541 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-13 15:22:07,541 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1881451338] [2024-11-13 15:22:07,542 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1881451338] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-13 15:22:07,542 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-13 15:22:07,542 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-11-13 15:22:07,542 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [152342883] [2024-11-13 15:22:07,542 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-13 15:22:07,542 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-11-13 15:22:07,542 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-13 15:22:07,543 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-11-13 15:22:07,543 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2024-11-13 15:22:07,575 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 25 out of 77 [2024-11-13 15:22:07,576 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 68 places, 68 transitions, 165 flow. Second operand has 5 states, 5 states have (on average 25.8) internal successors, (129), 5 states have internal predecessors, (129), 0 states have call successors, (0), 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 15:22:07,576 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-13 15:22:07,576 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 25 of 77 [2024-11-13 15:22:07,576 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-13 15:22:09,954 INFO L124 PetriNetUnfolderBase]: 17938/23928 cut-off events. [2024-11-13 15:22:09,955 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-11-13 15:22:09,989 INFO L83 FinitePrefix]: Finished finitePrefix Result has 46168 conditions, 23928 events. 17938/23928 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 2005. Compared 154641 event pairs, 11530 based on Foata normal form. 0/11175 useless extension candidates. Maximal degree in co-relation 46143. Up to 21826 conditions per place. [2024-11-13 15:22:10,088 INFO L140 encePairwiseOnDemand]: 69/77 looper letters, 47 selfloop transitions, 7 changer transitions 0/71 dead transitions. [2024-11-13 15:22:10,089 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 72 places, 71 transitions, 279 flow [2024-11-13 15:22:10,089 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-11-13 15:22:10,089 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-11-13 15:22:10,090 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 180 transitions. [2024-11-13 15:22:10,090 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.4675324675324675 [2024-11-13 15:22:10,091 INFO L175 Difference]: Start difference. First operand has 68 places, 68 transitions, 165 flow. Second operand 5 states and 180 transitions. [2024-11-13 15:22:10,091 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 72 places, 71 transitions, 279 flow [2024-11-13 15:22:10,091 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 71 places, 71 transitions, 276 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-11-13 15:22:10,093 INFO L231 Difference]: Finished difference. Result has 73 places, 71 transitions, 199 flow [2024-11-13 15:22:10,093 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=77, PETRI_DIFFERENCE_MINUEND_FLOW=162, PETRI_DIFFERENCE_MINUEND_PLACES=67, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=68, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=61, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=199, PETRI_PLACES=73, PETRI_TRANSITIONS=71} [2024-11-13 15:22:10,093 INFO L277 CegarLoopForPetriNet]: 78 programPoint places, -5 predicate places. [2024-11-13 15:22:10,094 INFO L471 AbstractCegarLoop]: Abstraction has has 73 places, 71 transitions, 199 flow [2024-11-13 15:22:10,094 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 25.8) internal successors, (129), 5 states have internal predecessors, (129), 0 states have call successors, (0), 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 15:22:10,094 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-13 15:22:10,094 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1] [2024-11-13 15:22:10,094 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2024-11-13 15:22:10,094 INFO L396 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 37 more)] === [2024-11-13 15:22:10,094 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-13 15:22:10,094 INFO L85 PathProgramCache]: Analyzing trace with hash 990113563, now seen corresponding path program 1 times [2024-11-13 15:22:10,095 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-13 15:22:10,095 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1538261766] [2024-11-13 15:22:10,095 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-13 15:22:10,095 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-13 15:22:10,130 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 15:22:10,501 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 15:22:10,502 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-13 15:22:10,502 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1538261766] [2024-11-13 15:22:10,502 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1538261766] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-13 15:22:10,502 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [924209005] [2024-11-13 15:22:10,503 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-13 15:22:10,503 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-13 15:22:10,503 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dc9b1bd9-e2b0-426c-b6c3-75a34a205e4c/bin/uautomizer-verify-qhAvR1uOyd/z3 [2024-11-13 15:22:10,506 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dc9b1bd9-e2b0-426c-b6c3-75a34a205e4c/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-13 15:22:10,508 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dc9b1bd9-e2b0-426c-b6c3-75a34a205e4c/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2024-11-13 15:22:10,605 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 15:22:10,607 INFO L255 TraceCheckSpWp]: Trace formula consists of 87 conjuncts, 14 conjuncts are in the unsatisfiable core [2024-11-13 15:22:10,611 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-13 15:22:10,685 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 10 treesize of output 9 [2024-11-13 15:22:10,984 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-13 15:22:10,984 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-13 15:22:11,171 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 15:22:11,172 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [924209005] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-13 15:22:11,172 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-13 15:22:11,172 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 9 [2024-11-13 15:22:11,172 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1978381571] [2024-11-13 15:22:11,172 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-13 15:22:11,172 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-11-13 15:22:11,172 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-13 15:22:11,173 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-11-13 15:22:11,173 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=76, Unknown=0, NotChecked=0, Total=110 [2024-11-13 15:22:11,301 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 25 out of 77 [2024-11-13 15:22:11,302 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 73 places, 71 transitions, 199 flow. Second operand has 11 states, 11 states have (on average 26.363636363636363) internal successors, (290), 11 states have internal predecessors, (290), 0 states have call successors, (0), 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 15:22:11,302 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-13 15:22:11,302 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 25 of 77 [2024-11-13 15:22:11,302 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-13 15:22:13,464 INFO L124 PetriNetUnfolderBase]: 17938/23927 cut-off events. [2024-11-13 15:22:13,464 INFO L125 PetriNetUnfolderBase]: For 3/3 co-relation queries the response was YES. [2024-11-13 15:22:13,502 INFO L83 FinitePrefix]: Finished finitePrefix Result has 46181 conditions, 23927 events. 17938/23927 cut-off events. For 3/3 co-relation queries the response was YES. Maximal size of possible extension queue 2005. Compared 154884 event pairs, 11530 based on Foata normal form. 0/11177 useless extension candidates. Maximal degree in co-relation 46153. Up to 21826 conditions per place. [2024-11-13 15:22:13,595 INFO L140 encePairwiseOnDemand]: 72/77 looper letters, 46 selfloop transitions, 7 changer transitions 0/70 dead transitions. [2024-11-13 15:22:13,596 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 77 places, 70 transitions, 301 flow [2024-11-13 15:22:13,596 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-11-13 15:22:13,596 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-11-13 15:22:13,597 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 201 transitions. [2024-11-13 15:22:13,598 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.43506493506493504 [2024-11-13 15:22:13,598 INFO L175 Difference]: Start difference. First operand has 73 places, 71 transitions, 199 flow. Second operand 6 states and 201 transitions. [2024-11-13 15:22:13,598 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 77 places, 70 transitions, 301 flow [2024-11-13 15:22:13,599 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 76 places, 70 transitions, 300 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-11-13 15:22:13,600 INFO L231 Difference]: Finished difference. Result has 76 places, 70 transitions, 208 flow [2024-11-13 15:22:13,600 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=77, PETRI_DIFFERENCE_MINUEND_FLOW=194, PETRI_DIFFERENCE_MINUEND_PLACES=71, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=70, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=63, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=208, PETRI_PLACES=76, PETRI_TRANSITIONS=70} [2024-11-13 15:22:13,601 INFO L277 CegarLoopForPetriNet]: 78 programPoint places, -2 predicate places. [2024-11-13 15:22:13,601 INFO L471 AbstractCegarLoop]: Abstraction has has 76 places, 70 transitions, 208 flow [2024-11-13 15:22:13,601 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 26.363636363636363) internal successors, (290), 11 states have internal predecessors, (290), 0 states have call successors, (0), 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 15:22:13,601 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-13 15:22:13,602 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2024-11-13 15:22:13,622 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dc9b1bd9-e2b0-426c-b6c3-75a34a205e4c/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2024-11-13 15:22:13,806 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dc9b1bd9-e2b0-426c-b6c3-75a34a205e4c/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-13 15:22:13,806 INFO L396 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 37 more)] === [2024-11-13 15:22:13,807 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-13 15:22:13,807 INFO L85 PathProgramCache]: Analyzing trace with hash 990185453, now seen corresponding path program 1 times [2024-11-13 15:22:13,807 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-13 15:22:13,807 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [513049152] [2024-11-13 15:22:13,807 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-13 15:22:13,807 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-13 15:22:13,833 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 15:22:14,069 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 15:22:14,069 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-13 15:22:14,069 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [513049152] [2024-11-13 15:22:14,069 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [513049152] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-13 15:22:14,069 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-13 15:22:14,069 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-11-13 15:22:14,070 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1033469962] [2024-11-13 15:22:14,070 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-13 15:22:14,070 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-11-13 15:22:14,070 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-13 15:22:14,070 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-11-13 15:22:14,071 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2024-11-13 15:22:14,162 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 25 out of 77 [2024-11-13 15:22:14,162 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 76 places, 70 transitions, 208 flow. Second operand has 5 states, 5 states have (on average 26.0) internal successors, (130), 5 states have internal predecessors, (130), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-13 15:22:14,162 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-13 15:22:14,162 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 25 of 77 [2024-11-13 15:22:14,162 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-13 15:22:16,428 INFO L124 PetriNetUnfolderBase]: 17939/23930 cut-off events. [2024-11-13 15:22:16,428 INFO L125 PetriNetUnfolderBase]: For 3/3 co-relation queries the response was YES. [2024-11-13 15:22:16,489 INFO L83 FinitePrefix]: Finished finitePrefix Result has 46194 conditions, 23930 events. 17939/23930 cut-off events. For 3/3 co-relation queries the response was YES. Maximal size of possible extension queue 2005. Compared 154746 event pairs, 11530 based on Foata normal form. 0/11179 useless extension candidates. Maximal degree in co-relation 46161. Up to 21828 conditions per place. [2024-11-13 15:22:16,585 INFO L140 encePairwiseOnDemand]: 68/77 looper letters, 47 selfloop transitions, 9 changer transitions 0/73 dead transitions. [2024-11-13 15:22:16,586 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 80 places, 73 transitions, 326 flow [2024-11-13 15:22:16,588 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-11-13 15:22:16,588 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-11-13 15:22:16,589 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 179 transitions. [2024-11-13 15:22:16,589 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.4649350649350649 [2024-11-13 15:22:16,589 INFO L175 Difference]: Start difference. First operand has 76 places, 70 transitions, 208 flow. Second operand 5 states and 179 transitions. [2024-11-13 15:22:16,589 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 80 places, 73 transitions, 326 flow [2024-11-13 15:22:16,591 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 72 places, 73 transitions, 292 flow, removed 3 selfloop flow, removed 8 redundant places. [2024-11-13 15:22:16,596 INFO L231 Difference]: Finished difference. Result has 74 places, 73 transitions, 217 flow [2024-11-13 15:22:16,598 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=77, PETRI_DIFFERENCE_MINUEND_FLOW=174, PETRI_DIFFERENCE_MINUEND_PLACES=68, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=70, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=61, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=217, PETRI_PLACES=74, PETRI_TRANSITIONS=73} [2024-11-13 15:22:16,599 INFO L277 CegarLoopForPetriNet]: 78 programPoint places, -4 predicate places. [2024-11-13 15:22:16,599 INFO L471 AbstractCegarLoop]: Abstraction has has 74 places, 73 transitions, 217 flow [2024-11-13 15:22:16,599 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 26.0) internal successors, (130), 5 states have internal predecessors, (130), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-13 15:22:16,601 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-13 15:22:16,601 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1] [2024-11-13 15:22:16,601 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2024-11-13 15:22:16,601 INFO L396 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 37 more)] === [2024-11-13 15:22:16,602 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-13 15:22:16,602 INFO L85 PathProgramCache]: Analyzing trace with hash 630916860, now seen corresponding path program 1 times [2024-11-13 15:22:16,602 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-13 15:22:16,602 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [57804788] [2024-11-13 15:22:16,602 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-13 15:22:16,602 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-13 15:22:16,634 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 15:22:16,975 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 15:22:16,975 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-13 15:22:16,975 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [57804788] [2024-11-13 15:22:16,976 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [57804788] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-13 15:22:16,976 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1866906859] [2024-11-13 15:22:16,976 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-13 15:22:16,976 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-13 15:22:16,976 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dc9b1bd9-e2b0-426c-b6c3-75a34a205e4c/bin/uautomizer-verify-qhAvR1uOyd/z3 [2024-11-13 15:22:16,978 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dc9b1bd9-e2b0-426c-b6c3-75a34a205e4c/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-13 15:22:16,981 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dc9b1bd9-e2b0-426c-b6c3-75a34a205e4c/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2024-11-13 15:22:17,086 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 15:22:17,088 INFO L255 TraceCheckSpWp]: Trace formula consists of 112 conjuncts, 14 conjuncts are in the unsatisfiable core [2024-11-13 15:22:17,091 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-13 15:22:17,111 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 10 treesize of output 9 [2024-11-13 15:22:17,361 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-13 15:22:17,361 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-13 15:22:17,664 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 15:22:17,664 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1866906859] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-13 15:22:17,664 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-13 15:22:17,664 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 11 [2024-11-13 15:22:17,664 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1834771302] [2024-11-13 15:22:17,664 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-13 15:22:17,665 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2024-11-13 15:22:17,666 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-13 15:22:17,666 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2024-11-13 15:22:17,667 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=116, Unknown=0, NotChecked=0, Total=156 [2024-11-13 15:22:17,856 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 25 out of 77 [2024-11-13 15:22:17,857 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 74 places, 73 transitions, 217 flow. Second operand has 13 states, 13 states have (on average 26.307692307692307) internal successors, (342), 13 states have internal predecessors, (342), 0 states have call successors, (0), 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 15:22:17,857 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-13 15:22:17,857 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 25 of 77 [2024-11-13 15:22:17,857 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-13 15:22:20,045 INFO L124 PetriNetUnfolderBase]: 17939/23929 cut-off events. [2024-11-13 15:22:20,045 INFO L125 PetriNetUnfolderBase]: For 5/5 co-relation queries the response was YES. [2024-11-13 15:22:20,101 INFO L83 FinitePrefix]: Finished finitePrefix Result has 46192 conditions, 23929 events. 17939/23929 cut-off events. For 5/5 co-relation queries the response was YES. Maximal size of possible extension queue 2005. Compared 154642 event pairs, 11530 based on Foata normal form. 0/11181 useless extension candidates. Maximal degree in co-relation 46150. Up to 21821 conditions per place. [2024-11-13 15:22:20,187 INFO L140 encePairwiseOnDemand]: 69/77 looper letters, 43 selfloop transitions, 12 changer transitions 0/72 dead transitions. [2024-11-13 15:22:20,187 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 79 places, 72 transitions, 323 flow [2024-11-13 15:22:20,188 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-11-13 15:22:20,188 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-11-13 15:22:20,189 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 228 transitions. [2024-11-13 15:22:20,189 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.4230055658627087 [2024-11-13 15:22:20,189 INFO L175 Difference]: Start difference. First operand has 74 places, 73 transitions, 217 flow. Second operand 7 states and 228 transitions. [2024-11-13 15:22:20,189 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 79 places, 72 transitions, 323 flow [2024-11-13 15:22:20,190 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 77 places, 72 transitions, 316 flow, removed 0 selfloop flow, removed 2 redundant places. [2024-11-13 15:22:20,192 INFO L231 Difference]: Finished difference. Result has 77 places, 72 transitions, 230 flow [2024-11-13 15:22:20,192 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=77, PETRI_DIFFERENCE_MINUEND_FLOW=206, PETRI_DIFFERENCE_MINUEND_PLACES=71, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=72, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=12, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=60, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=230, PETRI_PLACES=77, PETRI_TRANSITIONS=72} [2024-11-13 15:22:20,193 INFO L277 CegarLoopForPetriNet]: 78 programPoint places, -1 predicate places. [2024-11-13 15:22:20,193 INFO L471 AbstractCegarLoop]: Abstraction has has 77 places, 72 transitions, 230 flow [2024-11-13 15:22:20,194 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 26.307692307692307) internal successors, (342), 13 states have internal predecessors, (342), 0 states have call successors, (0), 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 15:22:20,194 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-13 15:22:20,194 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1] [2024-11-13 15:22:20,215 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dc9b1bd9-e2b0-426c-b6c3-75a34a205e4c/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2024-11-13 15:22:20,398 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dc9b1bd9-e2b0-426c-b6c3-75a34a205e4c/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-13 15:22:20,398 INFO L396 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 37 more)] === [2024-11-13 15:22:20,399 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-13 15:22:20,399 INFO L85 PathProgramCache]: Analyzing trace with hash -1914485861, now seen corresponding path program 1 times [2024-11-13 15:22:20,399 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-13 15:22:20,399 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [780795355] [2024-11-13 15:22:20,399 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-13 15:22:20,399 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-13 15:22:20,429 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 15:22:20,747 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 15:22:20,747 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-13 15:22:20,748 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [780795355] [2024-11-13 15:22:20,748 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [780795355] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-13 15:22:20,748 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1019665992] [2024-11-13 15:22:20,748 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-13 15:22:20,749 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-13 15:22:20,749 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dc9b1bd9-e2b0-426c-b6c3-75a34a205e4c/bin/uautomizer-verify-qhAvR1uOyd/z3 [2024-11-13 15:22:20,751 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dc9b1bd9-e2b0-426c-b6c3-75a34a205e4c/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-13 15:22:20,753 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dc9b1bd9-e2b0-426c-b6c3-75a34a205e4c/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2024-11-13 15:22:20,859 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 15:22:20,860 INFO L255 TraceCheckSpWp]: Trace formula consists of 137 conjuncts, 15 conjuncts are in the unsatisfiable core [2024-11-13 15:22:20,862 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-13 15:22:20,880 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 10 treesize of output 9 [2024-11-13 15:22:21,095 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 15:22:21,095 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-13 15:22:21,243 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 15:22:21,243 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1019665992] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-13 15:22:21,243 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-13 15:22:21,243 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 11 [2024-11-13 15:22:21,244 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1875846244] [2024-11-13 15:22:21,244 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-13 15:22:21,244 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2024-11-13 15:22:21,244 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-13 15:22:21,245 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2024-11-13 15:22:21,245 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=116, Unknown=0, NotChecked=0, Total=156 [2024-11-13 15:22:21,655 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 25 out of 77 [2024-11-13 15:22:21,655 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 77 places, 72 transitions, 230 flow. Second operand has 13 states, 13 states have (on average 26.46153846153846) internal successors, (344), 13 states have internal predecessors, (344), 0 states have call successors, (0), 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 15:22:21,656 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-13 15:22:21,656 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 25 of 77 [2024-11-13 15:22:21,656 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-13 15:22:23,517 INFO L124 PetriNetUnfolderBase]: 17941/23934 cut-off events. [2024-11-13 15:22:23,517 INFO L125 PetriNetUnfolderBase]: For 6/6 co-relation queries the response was YES. [2024-11-13 15:22:23,567 INFO L83 FinitePrefix]: Finished finitePrefix Result has 46216 conditions, 23934 events. 17941/23934 cut-off events. For 6/6 co-relation queries the response was YES. Maximal size of possible extension queue 2005. Compared 154520 event pairs, 11530 based on Foata normal form. 0/11186 useless extension candidates. Maximal degree in co-relation 46155. Up to 21822 conditions per place. [2024-11-13 15:22:23,641 INFO L140 encePairwiseOnDemand]: 68/77 looper letters, 39 selfloop transitions, 21 changer transitions 0/77 dead transitions. [2024-11-13 15:22:23,641 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 84 places, 77 transitions, 372 flow [2024-11-13 15:22:23,641 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-11-13 15:22:23,642 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-11-13 15:22:23,643 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 284 transitions. [2024-11-13 15:22:23,643 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.4098124098124098 [2024-11-13 15:22:23,643 INFO L175 Difference]: Start difference. First operand has 77 places, 72 transitions, 230 flow. Second operand 9 states and 284 transitions. [2024-11-13 15:22:23,643 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 84 places, 77 transitions, 372 flow [2024-11-13 15:22:23,644 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 79 places, 77 transitions, 345 flow, removed 3 selfloop flow, removed 5 redundant places. [2024-11-13 15:22:23,646 INFO L231 Difference]: Finished difference. Result has 79 places, 77 transitions, 267 flow [2024-11-13 15:22:23,646 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=77, PETRI_DIFFERENCE_MINUEND_FLOW=201, PETRI_DIFFERENCE_MINUEND_PLACES=71, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=71, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=15, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=56, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=267, PETRI_PLACES=79, PETRI_TRANSITIONS=77} [2024-11-13 15:22:23,647 INFO L277 CegarLoopForPetriNet]: 78 programPoint places, 1 predicate places. [2024-11-13 15:22:23,647 INFO L471 AbstractCegarLoop]: Abstraction has has 79 places, 77 transitions, 267 flow [2024-11-13 15:22:23,647 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 26.46153846153846) internal successors, (344), 13 states have internal predecessors, (344), 0 states have call successors, (0), 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 15:22:23,647 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-13 15:22:23,647 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-13 15:22:23,667 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dc9b1bd9-e2b0-426c-b6c3-75a34a205e4c/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2024-11-13 15:22:23,848 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dc9b1bd9-e2b0-426c-b6c3-75a34a205e4c/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6 [2024-11-13 15:22:23,848 INFO L396 AbstractCegarLoop]: === Iteration 8 === Targeting thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 37 more)] === [2024-11-13 15:22:23,848 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-13 15:22:23,848 INFO L85 PathProgramCache]: Analyzing trace with hash -1493711159, now seen corresponding path program 1 times [2024-11-13 15:22:23,848 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-13 15:22:23,848 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1741470549] [2024-11-13 15:22:23,849 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-13 15:22:23,849 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-13 15:22:23,866 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 15:22:23,961 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 15:22:23,961 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-13 15:22:23,961 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1741470549] [2024-11-13 15:22:23,961 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1741470549] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-13 15:22:23,961 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-13 15:22:23,962 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-11-13 15:22:23,962 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1524697689] [2024-11-13 15:22:23,962 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-13 15:22:23,962 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-13 15:22:23,962 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-13 15:22:23,962 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-13 15:22:23,962 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-11-13 15:22:23,971 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 28 out of 77 [2024-11-13 15:22:23,971 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 79 places, 77 transitions, 267 flow. Second operand has 4 states, 4 states have (on average 29.5) internal successors, (118), 4 states have internal predecessors, (118), 0 states have call successors, (0), 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 15:22:23,971 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-13 15:22:23,972 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 28 of 77 [2024-11-13 15:22:23,972 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-13 15:22:25,825 INFO L124 PetriNetUnfolderBase]: 19389/26036 cut-off events. [2024-11-13 15:22:25,825 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2024-11-13 15:22:25,872 INFO L83 FinitePrefix]: Finished finitePrefix Result has 50350 conditions, 26036 events. 19389/26036 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 2045. Compared 171241 event pairs, 12584 based on Foata normal form. 396/13261 useless extension candidates. Maximal degree in co-relation 46094. Up to 21835 conditions per place. [2024-11-13 15:22:25,950 INFO L140 encePairwiseOnDemand]: 62/77 looper letters, 94 selfloop transitions, 7 changer transitions 0/118 dead transitions. [2024-11-13 15:22:25,950 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 83 places, 118 transitions, 617 flow [2024-11-13 15:22:25,950 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-11-13 15:22:25,950 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-11-13 15:22:25,951 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 234 transitions. [2024-11-13 15:22:25,951 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.6077922077922078 [2024-11-13 15:22:25,951 INFO L175 Difference]: Start difference. First operand has 79 places, 77 transitions, 267 flow. Second operand 5 states and 234 transitions. [2024-11-13 15:22:25,952 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 83 places, 118 transitions, 617 flow [2024-11-13 15:22:25,953 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 77 places, 118 transitions, 545 flow, removed 12 selfloop flow, removed 6 redundant places. [2024-11-13 15:22:25,955 INFO L231 Difference]: Finished difference. Result has 79 places, 81 transitions, 287 flow [2024-11-13 15:22:25,955 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=77, PETRI_DIFFERENCE_MINUEND_FLOW=224, PETRI_DIFFERENCE_MINUEND_PLACES=73, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=77, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=70, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=287, PETRI_PLACES=79, PETRI_TRANSITIONS=81} [2024-11-13 15:22:25,956 INFO L277 CegarLoopForPetriNet]: 78 programPoint places, 1 predicate places. [2024-11-13 15:22:25,956 INFO L471 AbstractCegarLoop]: Abstraction has has 79 places, 81 transitions, 287 flow [2024-11-13 15:22:25,956 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 29.5) internal successors, (118), 4 states have internal predecessors, (118), 0 states have call successors, (0), 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 15:22:25,956 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-13 15:22:25,956 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-13 15:22:25,957 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2024-11-13 15:22:25,957 INFO L396 AbstractCegarLoop]: === Iteration 9 === Targeting thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 37 more)] === [2024-11-13 15:22:25,957 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-13 15:22:25,957 INFO L85 PathProgramCache]: Analyzing trace with hash -308534224, now seen corresponding path program 1 times [2024-11-13 15:22:25,957 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-13 15:22:25,958 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [932878021] [2024-11-13 15:22:25,958 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-13 15:22:25,958 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-13 15:22:25,979 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 15:22:26,381 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-13 15:22:26,381 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-13 15:22:26,381 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [932878021] [2024-11-13 15:22:26,381 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [932878021] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-13 15:22:26,381 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-13 15:22:26,381 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-11-13 15:22:26,381 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1716258084] [2024-11-13 15:22:26,381 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-13 15:22:26,382 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-11-13 15:22:26,382 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-13 15:22:26,382 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-11-13 15:22:26,382 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2024-11-13 15:22:26,428 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 25 out of 77 [2024-11-13 15:22:26,429 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 79 places, 81 transitions, 287 flow. Second operand has 6 states, 6 states have (on average 26.333333333333332) internal successors, (158), 6 states have internal predecessors, (158), 0 states have call successors, (0), 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 15:22:26,430 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-13 15:22:26,430 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 25 of 77 [2024-11-13 15:22:26,430 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-13 15:22:27,462 INFO L124 PetriNetUnfolderBase]: 9262/13250 cut-off events. [2024-11-13 15:22:27,462 INFO L125 PetriNetUnfolderBase]: For 1228/1228 co-relation queries the response was YES. [2024-11-13 15:22:27,481 INFO L83 FinitePrefix]: Finished finitePrefix Result has 27627 conditions, 13250 events. 9262/13250 cut-off events. For 1228/1228 co-relation queries the response was YES. Maximal size of possible extension queue 954. Compared 89489 event pairs, 6072 based on Foata normal form. 0/7765 useless extension candidates. Maximal degree in co-relation 23414. Up to 11602 conditions per place. [2024-11-13 15:22:27,517 INFO L140 encePairwiseOnDemand]: 71/77 looper letters, 56 selfloop transitions, 4 changer transitions 0/77 dead transitions. [2024-11-13 15:22:27,517 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 78 places, 77 transitions, 391 flow [2024-11-13 15:22:27,517 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-11-13 15:22:27,517 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-11-13 15:22:27,518 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 145 transitions. [2024-11-13 15:22:27,518 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.4707792207792208 [2024-11-13 15:22:27,518 INFO L175 Difference]: Start difference. First operand has 79 places, 81 transitions, 287 flow. Second operand 4 states and 145 transitions. [2024-11-13 15:22:27,518 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 78 places, 77 transitions, 391 flow [2024-11-13 15:22:27,521 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 76 places, 77 transitions, 386 flow, removed 0 selfloop flow, removed 2 redundant places. [2024-11-13 15:22:27,522 INFO L231 Difference]: Finished difference. Result has 76 places, 77 transitions, 274 flow [2024-11-13 15:22:27,522 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=77, PETRI_DIFFERENCE_MINUEND_FLOW=266, PETRI_DIFFERENCE_MINUEND_PLACES=73, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=77, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=73, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=274, PETRI_PLACES=76, PETRI_TRANSITIONS=77} [2024-11-13 15:22:27,523 INFO L277 CegarLoopForPetriNet]: 78 programPoint places, -2 predicate places. [2024-11-13 15:22:27,523 INFO L471 AbstractCegarLoop]: Abstraction has has 76 places, 77 transitions, 274 flow [2024-11-13 15:22:27,523 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 26.333333333333332) internal successors, (158), 6 states have internal predecessors, (158), 0 states have call successors, (0), 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 15:22:27,523 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-13 15:22:27,523 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-13 15:22:27,523 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2024-11-13 15:22:27,524 INFO L396 AbstractCegarLoop]: === Iteration 10 === Targeting thread2Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 37 more)] === [2024-11-13 15:22:27,524 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-13 15:22:27,524 INFO L85 PathProgramCache]: Analyzing trace with hash -2011093184, now seen corresponding path program 1 times [2024-11-13 15:22:27,524 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-13 15:22:27,524 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2013273806] [2024-11-13 15:22:27,525 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-13 15:22:27,525 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-13 15:22:27,538 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 15:22:27,609 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 15:22:27,610 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-13 15:22:27,610 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2013273806] [2024-11-13 15:22:27,610 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2013273806] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-13 15:22:27,610 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-13 15:22:27,610 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-11-13 15:22:27,610 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [788699093] [2024-11-13 15:22:27,610 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-13 15:22:27,611 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-13 15:22:27,611 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-13 15:22:27,611 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-13 15:22:27,611 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-11-13 15:22:27,618 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 28 out of 77 [2024-11-13 15:22:27,619 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 76 places, 77 transitions, 274 flow. Second operand has 4 states, 4 states have (on average 30.0) internal successors, (120), 4 states have internal predecessors, (120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-13 15:22:27,619 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-13 15:22:27,619 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 28 of 77 [2024-11-13 15:22:27,619 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-13 15:22:28,668 INFO L124 PetriNetUnfolderBase]: 10050/14405 cut-off events. [2024-11-13 15:22:28,668 INFO L125 PetriNetUnfolderBase]: For 1388/1388 co-relation queries the response was YES. [2024-11-13 15:22:28,698 INFO L83 FinitePrefix]: Finished finitePrefix Result has 30340 conditions, 14405 events. 10050/14405 cut-off events. For 1388/1388 co-relation queries the response was YES. Maximal size of possible extension queue 1059. Compared 98952 event pairs, 6675 based on Foata normal form. 182/8854 useless extension candidates. Maximal degree in co-relation 25662. Up to 11609 conditions per place. [2024-11-13 15:22:28,742 INFO L140 encePairwiseOnDemand]: 64/77 looper letters, 83 selfloop transitions, 10 changer transitions 0/110 dead transitions. [2024-11-13 15:22:28,742 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 80 places, 110 transitions, 572 flow [2024-11-13 15:22:28,742 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-11-13 15:22:28,742 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-11-13 15:22:28,743 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 220 transitions. [2024-11-13 15:22:28,743 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5714285714285714 [2024-11-13 15:22:28,743 INFO L175 Difference]: Start difference. First operand has 76 places, 77 transitions, 274 flow. Second operand 5 states and 220 transitions. [2024-11-13 15:22:28,744 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 80 places, 110 transitions, 572 flow [2024-11-13 15:22:28,745 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 78 places, 110 transitions, 567 flow, removed 0 selfloop flow, removed 2 redundant places. [2024-11-13 15:22:28,746 INFO L231 Difference]: Finished difference. Result has 80 places, 81 transitions, 348 flow [2024-11-13 15:22:28,746 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=77, PETRI_DIFFERENCE_MINUEND_FLOW=269, PETRI_DIFFERENCE_MINUEND_PLACES=74, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=77, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=67, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=348, PETRI_PLACES=80, PETRI_TRANSITIONS=81} [2024-11-13 15:22:28,747 INFO L277 CegarLoopForPetriNet]: 78 programPoint places, 2 predicate places. [2024-11-13 15:22:28,747 INFO L471 AbstractCegarLoop]: Abstraction has has 80 places, 81 transitions, 348 flow [2024-11-13 15:22:28,747 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 30.0) internal successors, (120), 4 states have internal predecessors, (120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-13 15:22:28,747 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-13 15:22:28,747 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-13 15:22:28,747 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2024-11-13 15:22:28,747 INFO L396 AbstractCegarLoop]: === Iteration 11 === Targeting thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 37 more)] === [2024-11-13 15:22:28,748 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-13 15:22:28,748 INFO L85 PathProgramCache]: Analyzing trace with hash -308534223, now seen corresponding path program 1 times [2024-11-13 15:22:28,748 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-13 15:22:28,748 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [232866485] [2024-11-13 15:22:28,748 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-13 15:22:28,748 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-13 15:22:28,764 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 15:22:28,834 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 15:22:28,835 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-13 15:22:28,835 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [232866485] [2024-11-13 15:22:28,835 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [232866485] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-13 15:22:28,835 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-13 15:22:28,835 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-11-13 15:22:28,835 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1240329232] [2024-11-13 15:22:28,835 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-13 15:22:28,835 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-13 15:22:28,836 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-13 15:22:28,836 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-13 15:22:28,836 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-11-13 15:22:28,854 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 25 out of 77 [2024-11-13 15:22:28,855 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 80 places, 81 transitions, 348 flow. Second operand has 4 states, 4 states have (on average 27.0) internal successors, (108), 4 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 15:22:28,855 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-13 15:22:28,855 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 25 of 77 [2024-11-13 15:22:28,855 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-13 15:22:30,015 INFO L124 PetriNetUnfolderBase]: 7453/11317 cut-off events. [2024-11-13 15:22:30,015 INFO L125 PetriNetUnfolderBase]: For 1973/1973 co-relation queries the response was YES. [2024-11-13 15:22:30,035 INFO L83 FinitePrefix]: Finished finitePrefix Result has 26060 conditions, 11317 events. 7453/11317 cut-off events. For 1973/1973 co-relation queries the response was YES. Maximal size of possible extension queue 788. Compared 80772 event pairs, 5072 based on Foata normal form. 0/7670 useless extension candidates. Maximal degree in co-relation 21169. Up to 9543 conditions per place. [2024-11-13 15:22:30,065 INFO L140 encePairwiseOnDemand]: 73/77 looper letters, 55 selfloop transitions, 7 changer transitions 0/79 dead transitions. [2024-11-13 15:22:30,065 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 81 places, 79 transitions, 464 flow [2024-11-13 15:22:30,065 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-11-13 15:22:30,065 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-11-13 15:22:30,066 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 141 transitions. [2024-11-13 15:22:30,066 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.4577922077922078 [2024-11-13 15:22:30,066 INFO L175 Difference]: Start difference. First operand has 80 places, 81 transitions, 348 flow. Second operand 4 states and 141 transitions. [2024-11-13 15:22:30,066 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 81 places, 79 transitions, 464 flow [2024-11-13 15:22:30,068 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 80 places, 79 transitions, 459 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-11-13 15:22:30,069 INFO L231 Difference]: Finished difference. Result has 80 places, 79 transitions, 349 flow [2024-11-13 15:22:30,069 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=77, PETRI_DIFFERENCE_MINUEND_FLOW=335, PETRI_DIFFERENCE_MINUEND_PLACES=77, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=79, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=72, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=349, PETRI_PLACES=80, PETRI_TRANSITIONS=79} [2024-11-13 15:22:30,070 INFO L277 CegarLoopForPetriNet]: 78 programPoint places, 2 predicate places. [2024-11-13 15:22:30,070 INFO L471 AbstractCegarLoop]: Abstraction has has 80 places, 79 transitions, 349 flow [2024-11-13 15:22:30,070 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 27.0) internal successors, (108), 4 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 15:22:30,070 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-13 15:22:30,070 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-13 15:22:30,070 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2024-11-13 15:22:30,070 INFO L396 AbstractCegarLoop]: === Iteration 12 === Targeting thread1Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 37 more)] === [2024-11-13 15:22:30,070 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-13 15:22:30,071 INFO L85 PathProgramCache]: Analyzing trace with hash -308534222, now seen corresponding path program 1 times [2024-11-13 15:22:30,071 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-13 15:22:30,071 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [277072906] [2024-11-13 15:22:30,071 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-13 15:22:30,071 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-13 15:22:30,087 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 15:22:30,221 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 15:22:30,221 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-13 15:22:30,221 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [277072906] [2024-11-13 15:22:30,221 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [277072906] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-13 15:22:30,222 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-13 15:22:30,222 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-11-13 15:22:30,222 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [818840079] [2024-11-13 15:22:30,222 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-13 15:22:30,222 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-11-13 15:22:30,222 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-13 15:22:30,223 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-11-13 15:22:30,223 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2024-11-13 15:22:30,296 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 25 out of 77 [2024-11-13 15:22:30,296 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 80 places, 79 transitions, 349 flow. Second operand has 6 states, 6 states have (on average 26.666666666666668) internal successors, (160), 6 states have internal predecessors, (160), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-13 15:22:30,296 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-13 15:22:30,296 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 25 of 77 [2024-11-13 15:22:30,297 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-13 15:22:32,870 INFO L124 PetriNetUnfolderBase]: 20578/28803 cut-off events. [2024-11-13 15:22:32,870 INFO L125 PetriNetUnfolderBase]: For 4136/4408 co-relation queries the response was YES. [2024-11-13 15:22:32,926 INFO L83 FinitePrefix]: Finished finitePrefix Result has 69077 conditions, 28803 events. 20578/28803 cut-off events. For 4136/4408 co-relation queries the response was YES. Maximal size of possible extension queue 1861. Compared 205485 event pairs, 5926 based on Foata normal form. 0/19669 useless extension candidates. Maximal degree in co-relation 53309. Up to 9294 conditions per place. [2024-11-13 15:22:33,025 INFO L140 encePairwiseOnDemand]: 69/77 looper letters, 162 selfloop transitions, 16 changer transitions 0/192 dead transitions. [2024-11-13 15:22:33,025 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 87 places, 192 transitions, 1039 flow [2024-11-13 15:22:33,026 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-11-13 15:22:33,026 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-11-13 15:22:33,027 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 359 transitions. [2024-11-13 15:22:33,027 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5827922077922078 [2024-11-13 15:22:33,028 INFO L175 Difference]: Start difference. First operand has 80 places, 79 transitions, 349 flow. Second operand 8 states and 359 transitions. [2024-11-13 15:22:33,028 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 87 places, 192 transitions, 1039 flow [2024-11-13 15:22:33,033 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 85 places, 192 transitions, 1031 flow, removed 0 selfloop flow, removed 2 redundant places. [2024-11-13 15:22:33,034 INFO L231 Difference]: Finished difference. Result has 88 places, 83 transitions, 405 flow [2024-11-13 15:22:33,034 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=77, PETRI_DIFFERENCE_MINUEND_FLOW=341, PETRI_DIFFERENCE_MINUEND_PLACES=78, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=79, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=13, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=64, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=405, PETRI_PLACES=88, PETRI_TRANSITIONS=83} [2024-11-13 15:22:33,035 INFO L277 CegarLoopForPetriNet]: 78 programPoint places, 10 predicate places. [2024-11-13 15:22:33,035 INFO L471 AbstractCegarLoop]: Abstraction has has 88 places, 83 transitions, 405 flow [2024-11-13 15:22:33,035 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 26.666666666666668) internal successors, (160), 6 states have internal predecessors, (160), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-13 15:22:33,035 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-13 15:22:33,035 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-13 15:22:33,036 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2024-11-13 15:22:33,036 INFO L396 AbstractCegarLoop]: === Iteration 13 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 37 more)] === [2024-11-13 15:22:33,036 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-13 15:22:33,036 INFO L85 PathProgramCache]: Analyzing trace with hash -1389173862, now seen corresponding path program 1 times [2024-11-13 15:22:33,036 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-13 15:22:33,036 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1608723103] [2024-11-13 15:22:33,036 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-13 15:22:33,036 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-13 15:22:33,056 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 15:22:33,236 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 15:22:33,236 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-13 15:22:33,236 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1608723103] [2024-11-13 15:22:33,236 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1608723103] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-13 15:22:33,236 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-13 15:22:33,237 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-11-13 15:22:33,237 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1912680926] [2024-11-13 15:22:33,237 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-13 15:22:33,237 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-11-13 15:22:33,237 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-13 15:22:33,238 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-11-13 15:22:33,238 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2024-11-13 15:22:33,299 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 25 out of 77 [2024-11-13 15:22:33,300 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 88 places, 83 transitions, 405 flow. Second operand has 6 states, 6 states have (on average 27.0) internal successors, (162), 6 states have internal predecessors, (162), 0 states have call successors, (0), 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 15:22:33,300 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-13 15:22:33,300 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 25 of 77 [2024-11-13 15:22:33,300 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-13 15:22:36,006 INFO L124 PetriNetUnfolderBase]: 20821/30040 cut-off events. [2024-11-13 15:22:36,007 INFO L125 PetriNetUnfolderBase]: For 8321/10117 co-relation queries the response was YES. [2024-11-13 15:22:36,084 INFO L83 FinitePrefix]: Finished finitePrefix Result has 76977 conditions, 30040 events. 20821/30040 cut-off events. For 8321/10117 co-relation queries the response was YES. Maximal size of possible extension queue 1986. Compared 229942 event pairs, 10116 based on Foata normal form. 0/21989 useless extension candidates. Maximal degree in co-relation 65340. Up to 14369 conditions per place. [2024-11-13 15:22:36,175 INFO L140 encePairwiseOnDemand]: 70/77 looper letters, 117 selfloop transitions, 14 changer transitions 0/146 dead transitions. [2024-11-13 15:22:36,175 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 93 places, 146 transitions, 858 flow [2024-11-13 15:22:36,175 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-11-13 15:22:36,175 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-11-13 15:22:36,176 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 258 transitions. [2024-11-13 15:22:36,176 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5584415584415584 [2024-11-13 15:22:36,176 INFO L175 Difference]: Start difference. First operand has 88 places, 83 transitions, 405 flow. Second operand 6 states and 258 transitions. [2024-11-13 15:22:36,176 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 93 places, 146 transitions, 858 flow [2024-11-13 15:22:36,186 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 93 places, 146 transitions, 858 flow, removed 0 selfloop flow, removed 0 redundant places. [2024-11-13 15:22:36,188 INFO L231 Difference]: Finished difference. Result has 96 places, 85 transitions, 458 flow [2024-11-13 15:22:36,188 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=77, PETRI_DIFFERENCE_MINUEND_FLOW=405, PETRI_DIFFERENCE_MINUEND_PLACES=88, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=83, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=12, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=69, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=458, PETRI_PLACES=96, PETRI_TRANSITIONS=85} [2024-11-13 15:22:36,189 INFO L277 CegarLoopForPetriNet]: 78 programPoint places, 18 predicate places. [2024-11-13 15:22:36,189 INFO L471 AbstractCegarLoop]: Abstraction has has 96 places, 85 transitions, 458 flow [2024-11-13 15:22:36,189 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 27.0) internal successors, (162), 6 states have internal predecessors, (162), 0 states have call successors, (0), 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 15:22:36,189 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-13 15:22:36,189 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-13 15:22:36,189 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2024-11-13 15:22:36,189 INFO L396 AbstractCegarLoop]: === Iteration 14 === Targeting thread1Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 37 more)] === [2024-11-13 15:22:36,190 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-13 15:22:36,190 INFO L85 PathProgramCache]: Analyzing trace with hash -757654752, now seen corresponding path program 1 times [2024-11-13 15:22:36,190 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-13 15:22:36,190 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1281725571] [2024-11-13 15:22:36,190 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-13 15:22:36,190 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-13 15:22:36,209 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 15:22:36,385 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 15:22:36,386 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-13 15:22:36,386 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1281725571] [2024-11-13 15:22:36,386 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1281725571] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-13 15:22:36,386 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1249975065] [2024-11-13 15:22:36,386 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-13 15:22:36,386 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-13 15:22:36,386 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dc9b1bd9-e2b0-426c-b6c3-75a34a205e4c/bin/uautomizer-verify-qhAvR1uOyd/z3 [2024-11-13 15:22:36,388 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dc9b1bd9-e2b0-426c-b6c3-75a34a205e4c/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-13 15:22:36,392 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dc9b1bd9-e2b0-426c-b6c3-75a34a205e4c/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2024-11-13 15:22:36,498 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 15:22:36,499 INFO L255 TraceCheckSpWp]: Trace formula consists of 185 conjuncts, 14 conjuncts are in the unsatisfiable core [2024-11-13 15:22:36,501 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-13 15:22:36,604 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 15:22:36,604 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-13 15:22:36,663 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 29 treesize of output 25 [2024-11-13 15:22:36,707 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 15:22:36,708 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1249975065] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-13 15:22:36,708 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-13 15:22:36,708 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 10 [2024-11-13 15:22:36,709 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1489731009] [2024-11-13 15:22:36,709 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-13 15:22:36,710 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-11-13 15:22:36,710 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-13 15:22:36,711 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-11-13 15:22:36,711 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=96, Unknown=0, NotChecked=0, Total=132 [2024-11-13 15:22:36,961 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 28 out of 77 [2024-11-13 15:22:36,961 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 96 places, 85 transitions, 458 flow. Second operand has 12 states, 12 states have (on average 29.833333333333332) internal successors, (358), 12 states have internal predecessors, (358), 0 states have call successors, (0), 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 15:22:36,961 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-13 15:22:36,961 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 28 of 77 [2024-11-13 15:22:36,962 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-13 15:22:39,020 INFO L124 PetriNetUnfolderBase]: 13608/21050 cut-off events. [2024-11-13 15:22:39,020 INFO L125 PetriNetUnfolderBase]: For 6233/6233 co-relation queries the response was YES. [2024-11-13 15:22:39,091 INFO L83 FinitePrefix]: Finished finitePrefix Result has 54390 conditions, 21050 events. 13608/21050 cut-off events. For 6233/6233 co-relation queries the response was YES. Maximal size of possible extension queue 1406. Compared 169673 event pairs, 6667 based on Foata normal form. 0/16228 useless extension candidates. Maximal degree in co-relation 45354. Up to 8607 conditions per place. [2024-11-13 15:22:39,153 INFO L140 encePairwiseOnDemand]: 67/77 looper letters, 111 selfloop transitions, 21 changer transitions 0/151 dead transitions. [2024-11-13 15:22:39,153 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 102 places, 151 transitions, 924 flow [2024-11-13 15:22:39,154 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-11-13 15:22:39,154 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-11-13 15:22:39,155 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 312 transitions. [2024-11-13 15:22:39,155 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5788497217068646 [2024-11-13 15:22:39,155 INFO L175 Difference]: Start difference. First operand has 96 places, 85 transitions, 458 flow. Second operand 7 states and 312 transitions. [2024-11-13 15:22:39,155 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 102 places, 151 transitions, 924 flow [2024-11-13 15:22:39,177 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 100 places, 151 transitions, 909 flow, removed 0 selfloop flow, removed 2 redundant places. [2024-11-13 15:22:39,179 INFO L231 Difference]: Finished difference. Result has 102 places, 86 transitions, 502 flow [2024-11-13 15:22:39,179 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=77, PETRI_DIFFERENCE_MINUEND_FLOW=445, PETRI_DIFFERENCE_MINUEND_PLACES=94, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=85, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=20, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=64, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=502, PETRI_PLACES=102, PETRI_TRANSITIONS=86} [2024-11-13 15:22:39,179 INFO L277 CegarLoopForPetriNet]: 78 programPoint places, 24 predicate places. [2024-11-13 15:22:39,180 INFO L471 AbstractCegarLoop]: Abstraction has has 102 places, 86 transitions, 502 flow [2024-11-13 15:22:39,180 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 29.833333333333332) internal successors, (358), 12 states have internal predecessors, (358), 0 states have call successors, (0), 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 15:22:39,180 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-13 15:22:39,180 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-13 15:22:39,199 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dc9b1bd9-e2b0-426c-b6c3-75a34a205e4c/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2024-11-13 15:22:39,380 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dc9b1bd9-e2b0-426c-b6c3-75a34a205e4c/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-13 15:22:39,381 INFO L396 AbstractCegarLoop]: === Iteration 15 === Targeting thread2Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 37 more)] === [2024-11-13 15:22:39,381 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-13 15:22:39,381 INFO L85 PathProgramCache]: Analyzing trace with hash -399017463, now seen corresponding path program 1 times [2024-11-13 15:22:39,381 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-13 15:22:39,381 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1825074074] [2024-11-13 15:22:39,381 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-13 15:22:39,381 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-13 15:22:39,400 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 15:22:39,501 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-13 15:22:39,501 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-13 15:22:39,501 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1825074074] [2024-11-13 15:22:39,501 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1825074074] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-13 15:22:39,501 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-13 15:22:39,502 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-11-13 15:22:39,502 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1205091576] [2024-11-13 15:22:39,502 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-13 15:22:39,502 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-11-13 15:22:39,502 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-13 15:22:39,503 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-11-13 15:22:39,503 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2024-11-13 15:22:39,531 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 25 out of 77 [2024-11-13 15:22:39,532 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 102 places, 86 transitions, 502 flow. Second operand has 5 states, 5 states have (on average 27.4) internal successors, (137), 5 states have internal predecessors, (137), 0 states have call successors, (0), 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 15:22:39,532 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-13 15:22:39,532 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 25 of 77 [2024-11-13 15:22:39,532 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-13 15:22:41,192 INFO L124 PetriNetUnfolderBase]: 11644/18088 cut-off events. [2024-11-13 15:22:41,192 INFO L125 PetriNetUnfolderBase]: For 11749/11749 co-relation queries the response was YES. [2024-11-13 15:22:41,260 INFO L83 FinitePrefix]: Finished finitePrefix Result has 49174 conditions, 18088 events. 11644/18088 cut-off events. For 11749/11749 co-relation queries the response was YES. Maximal size of possible extension queue 1195. Compared 145765 event pairs, 10736 based on Foata normal form. 0/14416 useless extension candidates. Maximal degree in co-relation 41304. Up to 16199 conditions per place. [2024-11-13 15:22:41,317 INFO L140 encePairwiseOnDemand]: 73/77 looper letters, 56 selfloop transitions, 10 changer transitions 0/85 dead transitions. [2024-11-13 15:22:41,317 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 105 places, 85 transitions, 630 flow [2024-11-13 15:22:41,317 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-11-13 15:22:41,317 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-11-13 15:22:41,318 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 164 transitions. [2024-11-13 15:22:41,318 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.42597402597402595 [2024-11-13 15:22:41,318 INFO L175 Difference]: Start difference. First operand has 102 places, 86 transitions, 502 flow. Second operand 5 states and 164 transitions. [2024-11-13 15:22:41,318 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 105 places, 85 transitions, 630 flow [2024-11-13 15:22:41,331 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 102 places, 85 transitions, 589 flow, removed 1 selfloop flow, removed 3 redundant places. [2024-11-13 15:22:41,332 INFO L231 Difference]: Finished difference. Result has 102 places, 85 transitions, 477 flow [2024-11-13 15:22:41,332 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=77, PETRI_DIFFERENCE_MINUEND_FLOW=457, PETRI_DIFFERENCE_MINUEND_PLACES=98, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=85, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=75, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=477, PETRI_PLACES=102, PETRI_TRANSITIONS=85} [2024-11-13 15:22:41,333 INFO L277 CegarLoopForPetriNet]: 78 programPoint places, 24 predicate places. [2024-11-13 15:22:41,333 INFO L471 AbstractCegarLoop]: Abstraction has has 102 places, 85 transitions, 477 flow [2024-11-13 15:22:41,333 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 27.4) internal successors, (137), 5 states have internal predecessors, (137), 0 states have call successors, (0), 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 15:22:41,333 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-13 15:22:41,333 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-13 15:22:41,333 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2024-11-13 15:22:41,333 INFO L396 AbstractCegarLoop]: === Iteration 16 === Targeting thread2Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 37 more)] === [2024-11-13 15:22:41,334 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-13 15:22:41,334 INFO L85 PathProgramCache]: Analyzing trace with hash -399017462, now seen corresponding path program 1 times [2024-11-13 15:22:41,334 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-13 15:22:41,334 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [382702404] [2024-11-13 15:22:41,334 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-13 15:22:41,334 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-13 15:22:41,353 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 15:22:41,597 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 15:22:41,597 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-13 15:22:41,597 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [382702404] [2024-11-13 15:22:41,597 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [382702404] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-13 15:22:41,597 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [370613554] [2024-11-13 15:22:41,597 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-13 15:22:41,597 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-13 15:22:41,598 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dc9b1bd9-e2b0-426c-b6c3-75a34a205e4c/bin/uautomizer-verify-qhAvR1uOyd/z3 [2024-11-13 15:22:41,599 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dc9b1bd9-e2b0-426c-b6c3-75a34a205e4c/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-13 15:22:41,602 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dc9b1bd9-e2b0-426c-b6c3-75a34a205e4c/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2024-11-13 15:22:41,710 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 15:22:41,712 INFO L255 TraceCheckSpWp]: Trace formula consists of 200 conjuncts, 22 conjuncts are in the unsatisfiable core [2024-11-13 15:22:41,714 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-13 15:22:41,726 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 6 treesize of output 5 [2024-11-13 15:22:41,798 INFO L349 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2024-11-13 15:22:41,799 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 11 treesize of output 11 [2024-11-13 15:22:41,805 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 13 [2024-11-13 15:22:41,887 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-13 15:22:41,888 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-13 15:22:41,888 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [370613554] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-13 15:22:41,888 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-11-13 15:22:41,888 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [4] total 8 [2024-11-13 15:22:41,888 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [551256611] [2024-11-13 15:22:41,888 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-13 15:22:41,888 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-11-13 15:22:41,888 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-13 15:22:41,889 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-11-13 15:22:41,889 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2024-11-13 15:22:41,915 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 25 out of 77 [2024-11-13 15:22:41,915 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 102 places, 85 transitions, 477 flow. Second operand has 6 states, 6 states have (on average 27.0) internal successors, (162), 6 states have internal predecessors, (162), 0 states have call successors, (0), 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 15:22:41,915 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-13 15:22:41,915 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 25 of 77 [2024-11-13 15:22:41,915 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-13 15:22:42,996 INFO L124 PetriNetUnfolderBase]: 8141/13112 cut-off events. [2024-11-13 15:22:42,996 INFO L125 PetriNetUnfolderBase]: For 8095/8095 co-relation queries the response was YES. [2024-11-13 15:22:43,047 INFO L83 FinitePrefix]: Finished finitePrefix Result has 33739 conditions, 13112 events. 8141/13112 cut-off events. For 8095/8095 co-relation queries the response was YES. Maximal size of possible extension queue 793. Compared 104895 event pairs, 7431 based on Foata normal form. 0/11209 useless extension candidates. Maximal degree in co-relation 28159. Up to 11453 conditions per place. [2024-11-13 15:22:43,087 INFO L140 encePairwiseOnDemand]: 72/77 looper letters, 52 selfloop transitions, 12 changer transitions 0/83 dead transitions. [2024-11-13 15:22:43,087 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 104 places, 83 transitions, 597 flow [2024-11-13 15:22:43,087 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-11-13 15:22:43,087 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-11-13 15:22:43,088 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 163 transitions. [2024-11-13 15:22:43,088 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.42337662337662335 [2024-11-13 15:22:43,088 INFO L175 Difference]: Start difference. First operand has 102 places, 85 transitions, 477 flow. Second operand 5 states and 163 transitions. [2024-11-13 15:22:43,088 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 104 places, 83 transitions, 597 flow [2024-11-13 15:22:43,105 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 101 places, 83 transitions, 583 flow, removed 0 selfloop flow, removed 3 redundant places. [2024-11-13 15:22:43,106 INFO L231 Difference]: Finished difference. Result has 101 places, 83 transitions, 479 flow [2024-11-13 15:22:43,106 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=77, PETRI_DIFFERENCE_MINUEND_FLOW=455, PETRI_DIFFERENCE_MINUEND_PLACES=97, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=83, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=12, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=71, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=479, PETRI_PLACES=101, PETRI_TRANSITIONS=83} [2024-11-13 15:22:43,106 INFO L277 CegarLoopForPetriNet]: 78 programPoint places, 23 predicate places. [2024-11-13 15:22:43,106 INFO L471 AbstractCegarLoop]: Abstraction has has 101 places, 83 transitions, 479 flow [2024-11-13 15:22:43,107 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 27.0) internal successors, (162), 6 states have internal predecessors, (162), 0 states have call successors, (0), 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 15:22:43,107 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-13 15:22:43,107 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-13 15:22:43,121 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dc9b1bd9-e2b0-426c-b6c3-75a34a205e4c/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2024-11-13 15:22:43,307 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dc9b1bd9-e2b0-426c-b6c3-75a34a205e4c/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2024-11-13 15:22:43,307 INFO L396 AbstractCegarLoop]: === Iteration 17 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 37 more)] === [2024-11-13 15:22:43,308 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-13 15:22:43,308 INFO L85 PathProgramCache]: Analyzing trace with hash -399017464, now seen corresponding path program 1 times [2024-11-13 15:22:43,308 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-13 15:22:43,308 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [186372037] [2024-11-13 15:22:43,308 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-13 15:22:43,308 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-13 15:22:43,322 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 15:22:43,511 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 15:22:43,511 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-13 15:22:43,511 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [186372037] [2024-11-13 15:22:43,511 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [186372037] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-13 15:22:43,511 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [674315286] [2024-11-13 15:22:43,511 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-13 15:22:43,511 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-13 15:22:43,511 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dc9b1bd9-e2b0-426c-b6c3-75a34a205e4c/bin/uautomizer-verify-qhAvR1uOyd/z3 [2024-11-13 15:22:43,514 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dc9b1bd9-e2b0-426c-b6c3-75a34a205e4c/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-13 15:22:43,516 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dc9b1bd9-e2b0-426c-b6c3-75a34a205e4c/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2024-11-13 15:22:43,619 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 15:22:43,623 INFO L255 TraceCheckSpWp]: Trace formula consists of 195 conjuncts, 14 conjuncts are in the unsatisfiable core [2024-11-13 15:22:43,625 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-13 15:22:43,738 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 15:22:43,738 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-13 15:22:43,802 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 29 treesize of output 25 [2024-11-13 15:22:43,843 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 15:22:43,843 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [674315286] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-13 15:22:43,843 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-13 15:22:43,843 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 10 [2024-11-13 15:22:43,843 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2104192261] [2024-11-13 15:22:43,843 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-13 15:22:43,844 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-11-13 15:22:43,844 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-13 15:22:43,844 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-11-13 15:22:43,844 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=96, Unknown=0, NotChecked=0, Total=132 [2024-11-13 15:22:44,086 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 28 out of 77 [2024-11-13 15:22:44,087 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 101 places, 83 transitions, 479 flow. Second operand has 12 states, 12 states have (on average 30.333333333333332) internal successors, (364), 12 states have internal predecessors, (364), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-13 15:22:44,087 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-13 15:22:44,087 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 28 of 77 [2024-11-13 15:22:44,087 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-13 15:22:45,288 INFO L124 PetriNetUnfolderBase]: 7325/11878 cut-off events. [2024-11-13 15:22:45,288 INFO L125 PetriNetUnfolderBase]: For 7409/7409 co-relation queries the response was YES. [2024-11-13 15:22:45,336 INFO L83 FinitePrefix]: Finished finitePrefix Result has 30421 conditions, 11878 events. 7325/11878 cut-off events. For 7409/7409 co-relation queries the response was YES. Maximal size of possible extension queue 704. Compared 92342 event pairs, 3538 based on Foata normal form. 0/10652 useless extension candidates. Maximal degree in co-relation 25283. Up to 4320 conditions per place. [2024-11-13 15:22:45,373 INFO L140 encePairwiseOnDemand]: 67/77 looper letters, 104 selfloop transitions, 21 changer transitions 0/144 dead transitions. [2024-11-13 15:22:45,373 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 107 places, 144 transitions, 940 flow [2024-11-13 15:22:45,373 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-11-13 15:22:45,373 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-11-13 15:22:45,374 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 299 transitions. [2024-11-13 15:22:45,375 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5547309833024119 [2024-11-13 15:22:45,375 INFO L175 Difference]: Start difference. First operand has 101 places, 83 transitions, 479 flow. Second operand 7 states and 299 transitions. [2024-11-13 15:22:45,375 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 107 places, 144 transitions, 940 flow [2024-11-13 15:22:45,384 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 104 places, 144 transitions, 922 flow, removed 0 selfloop flow, removed 3 redundant places. [2024-11-13 15:22:45,385 INFO L231 Difference]: Finished difference. Result has 106 places, 84 transitions, 518 flow [2024-11-13 15:22:45,386 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=77, PETRI_DIFFERENCE_MINUEND_FLOW=461, PETRI_DIFFERENCE_MINUEND_PLACES=98, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=83, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=20, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=62, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=518, PETRI_PLACES=106, PETRI_TRANSITIONS=84} [2024-11-13 15:22:45,386 INFO L277 CegarLoopForPetriNet]: 78 programPoint places, 28 predicate places. [2024-11-13 15:22:45,386 INFO L471 AbstractCegarLoop]: Abstraction has has 106 places, 84 transitions, 518 flow [2024-11-13 15:22:45,387 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 30.333333333333332) internal successors, (364), 12 states have internal predecessors, (364), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-13 15:22:45,387 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-13 15:22:45,387 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-13 15:22:45,408 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dc9b1bd9-e2b0-426c-b6c3-75a34a205e4c/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2024-11-13 15:22:45,587 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dc9b1bd9-e2b0-426c-b6c3-75a34a205e4c/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-13 15:22:45,587 INFO L396 AbstractCegarLoop]: === Iteration 18 === Targeting thread4Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 37 more)] === [2024-11-13 15:22:45,588 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-13 15:22:45,588 INFO L85 PathProgramCache]: Analyzing trace with hash -1074213140, now seen corresponding path program 1 times [2024-11-13 15:22:45,588 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-13 15:22:45,588 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [610309636] [2024-11-13 15:22:45,588 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-13 15:22:45,588 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-13 15:22:45,600 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 15:22:45,637 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 15:22:45,637 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-13 15:22:45,638 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [610309636] [2024-11-13 15:22:45,638 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [610309636] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-13 15:22:45,638 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-13 15:22:45,638 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2024-11-13 15:22:45,638 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [549934925] [2024-11-13 15:22:45,638 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-13 15:22:45,638 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-13 15:22:45,638 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-13 15:22:45,638 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-13 15:22:45,638 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-13 15:22:45,643 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 28 out of 77 [2024-11-13 15:22:45,644 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 106 places, 84 transitions, 518 flow. Second operand has 3 states, 3 states have (on average 32.666666666666664) internal successors, (98), 3 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 15:22:45,644 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-13 15:22:45,644 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 28 of 77 [2024-11-13 15:22:45,644 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-13 15:22:46,796 INFO L124 PetriNetUnfolderBase]: 7208/11459 cut-off events. [2024-11-13 15:22:46,796 INFO L125 PetriNetUnfolderBase]: For 9737/9737 co-relation queries the response was YES. [2024-11-13 15:22:46,832 INFO L83 FinitePrefix]: Finished finitePrefix Result has 31128 conditions, 11459 events. 7208/11459 cut-off events. For 9737/9737 co-relation queries the response was YES. Maximal size of possible extension queue 601. Compared 81580 event pairs, 2438 based on Foata normal form. 96/10525 useless extension candidates. Maximal degree in co-relation 25945. Up to 6691 conditions per place. [2024-11-13 15:22:46,861 INFO L140 encePairwiseOnDemand]: 73/77 looper letters, 84 selfloop transitions, 2 changer transitions 0/105 dead transitions. [2024-11-13 15:22:46,862 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 108 places, 105 transitions, 766 flow [2024-11-13 15:22:46,862 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-13 15:22:46,862 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-11-13 15:22:46,862 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 141 transitions. [2024-11-13 15:22:46,863 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.6103896103896104 [2024-11-13 15:22:46,863 INFO L175 Difference]: Start difference. First operand has 106 places, 84 transitions, 518 flow. Second operand 3 states and 141 transitions. [2024-11-13 15:22:46,863 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 108 places, 105 transitions, 766 flow [2024-11-13 15:22:46,871 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 104 places, 105 transitions, 717 flow, removed 1 selfloop flow, removed 4 redundant places. [2024-11-13 15:22:46,872 INFO L231 Difference]: Finished difference. Result has 105 places, 84 transitions, 479 flow [2024-11-13 15:22:46,872 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=77, PETRI_DIFFERENCE_MINUEND_FLOW=469, PETRI_DIFFERENCE_MINUEND_PLACES=102, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=84, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=82, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=479, PETRI_PLACES=105, PETRI_TRANSITIONS=84} [2024-11-13 15:22:46,873 INFO L277 CegarLoopForPetriNet]: 78 programPoint places, 27 predicate places. [2024-11-13 15:22:46,873 INFO L471 AbstractCegarLoop]: Abstraction has has 105 places, 84 transitions, 479 flow [2024-11-13 15:22:46,873 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 32.666666666666664) internal successors, (98), 3 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 15:22:46,873 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-13 15:22:46,873 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-13 15:22:46,874 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2024-11-13 15:22:46,874 INFO L396 AbstractCegarLoop]: === Iteration 19 === Targeting thread1Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 37 more)] === [2024-11-13 15:22:46,874 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-13 15:22:46,874 INFO L85 PathProgramCache]: Analyzing trace with hash 261178567, now seen corresponding path program 1 times [2024-11-13 15:22:46,874 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-13 15:22:46,874 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [921019972] [2024-11-13 15:22:46,874 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-13 15:22:46,875 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-13 15:22:46,889 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 15:22:46,991 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-13 15:22:46,991 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-13 15:22:46,991 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [921019972] [2024-11-13 15:22:46,991 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [921019972] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-13 15:22:46,991 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2088133523] [2024-11-13 15:22:46,991 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-13 15:22:46,991 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-13 15:22:46,992 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dc9b1bd9-e2b0-426c-b6c3-75a34a205e4c/bin/uautomizer-verify-qhAvR1uOyd/z3 [2024-11-13 15:22:46,994 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dc9b1bd9-e2b0-426c-b6c3-75a34a205e4c/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-13 15:22:46,996 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dc9b1bd9-e2b0-426c-b6c3-75a34a205e4c/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2024-11-13 15:22:47,104 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 15:22:47,105 INFO L255 TraceCheckSpWp]: Trace formula consists of 203 conjuncts, 8 conjuncts are in the unsatisfiable core [2024-11-13 15:22:47,106 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-13 15:22:47,175 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-13 15:22:47,176 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-13 15:22:47,262 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-13 15:22:47,263 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2088133523] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-13 15:22:47,263 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-13 15:22:47,263 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 10 [2024-11-13 15:22:47,263 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2043668375] [2024-11-13 15:22:47,263 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-13 15:22:47,264 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-11-13 15:22:47,264 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-13 15:22:47,264 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-11-13 15:22:47,264 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=91, Unknown=0, NotChecked=0, Total=132 [2024-11-13 15:22:47,343 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 28 out of 77 [2024-11-13 15:22:47,344 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 105 places, 84 transitions, 479 flow. Second operand has 12 states, 12 states have (on average 30.166666666666668) internal successors, (362), 12 states have internal predecessors, (362), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-13 15:22:47,344 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-13 15:22:47,344 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 28 of 77 [2024-11-13 15:22:47,344 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-13 15:22:49,134 INFO L124 PetriNetUnfolderBase]: 11345/18901 cut-off events. [2024-11-13 15:22:49,134 INFO L125 PetriNetUnfolderBase]: For 18377/18377 co-relation queries the response was YES. [2024-11-13 15:22:49,219 INFO L83 FinitePrefix]: Finished finitePrefix Result has 50803 conditions, 18901 events. 11345/18901 cut-off events. For 18377/18377 co-relation queries the response was YES. Maximal size of possible extension queue 1015. Compared 158541 event pairs, 6866 based on Foata normal form. 636/18287 useless extension candidates. Maximal degree in co-relation 24143. Up to 7452 conditions per place. [2024-11-13 15:22:49,278 INFO L140 encePairwiseOnDemand]: 64/77 looper letters, 152 selfloop transitions, 27 changer transitions 0/198 dead transitions. [2024-11-13 15:22:49,278 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 114 places, 198 transitions, 1378 flow [2024-11-13 15:22:49,278 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-11-13 15:22:49,278 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-11-13 15:22:49,280 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 417 transitions. [2024-11-13 15:22:49,280 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5415584415584416 [2024-11-13 15:22:49,280 INFO L175 Difference]: Start difference. First operand has 105 places, 84 transitions, 479 flow. Second operand 10 states and 417 transitions. [2024-11-13 15:22:49,280 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 114 places, 198 transitions, 1378 flow [2024-11-13 15:22:49,293 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 112 places, 198 transitions, 1352 flow, removed 4 selfloop flow, removed 2 redundant places. [2024-11-13 15:22:49,295 INFO L231 Difference]: Finished difference. Result has 117 places, 101 transitions, 704 flow [2024-11-13 15:22:49,296 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=77, PETRI_DIFFERENCE_MINUEND_FLOW=471, PETRI_DIFFERENCE_MINUEND_PLACES=103, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=84, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=59, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=704, PETRI_PLACES=117, PETRI_TRANSITIONS=101} [2024-11-13 15:22:49,296 INFO L277 CegarLoopForPetriNet]: 78 programPoint places, 39 predicate places. [2024-11-13 15:22:49,296 INFO L471 AbstractCegarLoop]: Abstraction has has 117 places, 101 transitions, 704 flow [2024-11-13 15:22:49,297 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 30.166666666666668) internal successors, (362), 12 states have internal predecessors, (362), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-13 15:22:49,297 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-13 15:22:49,297 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-13 15:22:49,311 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dc9b1bd9-e2b0-426c-b6c3-75a34a205e4c/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2024-11-13 15:22:49,497 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dc9b1bd9-e2b0-426c-b6c3-75a34a205e4c/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-13 15:22:49,498 INFO L396 AbstractCegarLoop]: === Iteration 20 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 37 more)] === [2024-11-13 15:22:49,498 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-13 15:22:49,498 INFO L85 PathProgramCache]: Analyzing trace with hash -1365874511, now seen corresponding path program 1 times [2024-11-13 15:22:49,498 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-13 15:22:49,498 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1324332981] [2024-11-13 15:22:49,498 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-13 15:22:49,498 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-13 15:22:49,513 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 15:22:49,608 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-13 15:22:49,608 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-13 15:22:49,608 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1324332981] [2024-11-13 15:22:49,608 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1324332981] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-13 15:22:49,608 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [536736272] [2024-11-13 15:22:49,608 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-13 15:22:49,609 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-13 15:22:49,609 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dc9b1bd9-e2b0-426c-b6c3-75a34a205e4c/bin/uautomizer-verify-qhAvR1uOyd/z3 [2024-11-13 15:22:49,611 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dc9b1bd9-e2b0-426c-b6c3-75a34a205e4c/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-13 15:22:49,613 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dc9b1bd9-e2b0-426c-b6c3-75a34a205e4c/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2024-11-13 15:22:49,724 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 15:22:49,725 INFO L255 TraceCheckSpWp]: Trace formula consists of 214 conjuncts, 8 conjuncts are in the unsatisfiable core [2024-11-13 15:22:49,726 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-13 15:22:49,795 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-13 15:22:49,795 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-13 15:22:49,889 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-13 15:22:49,889 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [536736272] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-13 15:22:49,889 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-13 15:22:49,889 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 11 [2024-11-13 15:22:49,889 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1272124387] [2024-11-13 15:22:49,889 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-13 15:22:49,890 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-11-13 15:22:49,890 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-13 15:22:49,890 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-11-13 15:22:49,890 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=90, Unknown=0, NotChecked=0, Total=132 [2024-11-13 15:22:49,958 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 28 out of 77 [2024-11-13 15:22:49,958 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 117 places, 101 transitions, 704 flow. Second operand has 12 states, 12 states have (on average 30.333333333333332) internal successors, (364), 12 states have internal predecessors, (364), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-13 15:22:49,958 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-13 15:22:49,959 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 28 of 77 [2024-11-13 15:22:49,959 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-13 15:22:52,672 INFO L124 PetriNetUnfolderBase]: 17576/29221 cut-off events. [2024-11-13 15:22:52,672 INFO L125 PetriNetUnfolderBase]: For 37564/37564 co-relation queries the response was YES. [2024-11-13 15:22:52,823 INFO L83 FinitePrefix]: Finished finitePrefix Result has 82424 conditions, 29221 events. 17576/29221 cut-off events. For 37564/37564 co-relation queries the response was YES. Maximal size of possible extension queue 1555. Compared 260721 event pairs, 11902 based on Foata normal form. 1016/27733 useless extension candidates. Maximal degree in co-relation 40760. Up to 12674 conditions per place. [2024-11-13 15:22:52,917 INFO L140 encePairwiseOnDemand]: 66/77 looper letters, 134 selfloop transitions, 63 changer transitions 0/216 dead transitions. [2024-11-13 15:22:52,917 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 128 places, 216 transitions, 1758 flow [2024-11-13 15:22:52,917 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-11-13 15:22:52,917 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-11-13 15:22:52,918 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 458 transitions. [2024-11-13 15:22:52,919 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.49567099567099565 [2024-11-13 15:22:52,919 INFO L175 Difference]: Start difference. First operand has 117 places, 101 transitions, 704 flow. Second operand 12 states and 458 transitions. [2024-11-13 15:22:52,919 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 128 places, 216 transitions, 1758 flow [2024-11-13 15:22:52,946 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 127 places, 216 transitions, 1739 flow, removed 8 selfloop flow, removed 1 redundant places. [2024-11-13 15:22:52,949 INFO L231 Difference]: Finished difference. Result has 133 places, 131 transitions, 1179 flow [2024-11-13 15:22:52,949 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=77, PETRI_DIFFERENCE_MINUEND_FLOW=693, PETRI_DIFFERENCE_MINUEND_PLACES=116, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=101, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=35, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=57, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=1179, PETRI_PLACES=133, PETRI_TRANSITIONS=131} [2024-11-13 15:22:52,949 INFO L277 CegarLoopForPetriNet]: 78 programPoint places, 55 predicate places. [2024-11-13 15:22:52,950 INFO L471 AbstractCegarLoop]: Abstraction has has 133 places, 131 transitions, 1179 flow [2024-11-13 15:22:52,950 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 30.333333333333332) internal successors, (364), 12 states have internal predecessors, (364), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-13 15:22:52,950 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-13 15:22:52,950 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-13 15:22:52,972 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dc9b1bd9-e2b0-426c-b6c3-75a34a205e4c/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Ended with exit code 0 [2024-11-13 15:22:53,150 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dc9b1bd9-e2b0-426c-b6c3-75a34a205e4c/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-13 15:22:53,151 INFO L396 AbstractCegarLoop]: === Iteration 21 === Targeting thread1Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 37 more)] === [2024-11-13 15:22:53,151 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-13 15:22:53,151 INFO L85 PathProgramCache]: Analyzing trace with hash -166638802, now seen corresponding path program 2 times [2024-11-13 15:22:53,151 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-13 15:22:53,151 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1840532551] [2024-11-13 15:22:53,151 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-13 15:22:53,151 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-13 15:22:53,172 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 15:22:53,347 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-11-13 15:22:53,348 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-13 15:22:53,348 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1840532551] [2024-11-13 15:22:53,348 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1840532551] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-13 15:22:53,348 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1629450065] [2024-11-13 15:22:53,348 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-13 15:22:53,348 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-13 15:22:53,348 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dc9b1bd9-e2b0-426c-b6c3-75a34a205e4c/bin/uautomizer-verify-qhAvR1uOyd/z3 [2024-11-13 15:22:53,350 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dc9b1bd9-e2b0-426c-b6c3-75a34a205e4c/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-13 15:22:53,353 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dc9b1bd9-e2b0-426c-b6c3-75a34a205e4c/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2024-11-13 15:22:53,464 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-13 15:22:53,464 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-13 15:22:53,465 INFO L255 TraceCheckSpWp]: Trace formula consists of 216 conjuncts, 10 conjuncts are in the unsatisfiable core [2024-11-13 15:22:53,466 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-13 15:22:53,592 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-11-13 15:22:53,592 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-13 15:22:53,705 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-11-13 15:22:53,705 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1629450065] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-13 15:22:53,706 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-13 15:22:53,706 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 17 [2024-11-13 15:22:53,706 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [405471580] [2024-11-13 15:22:53,706 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-13 15:22:53,706 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2024-11-13 15:22:53,706 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-13 15:22:53,707 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2024-11-13 15:22:53,707 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=231, Unknown=0, NotChecked=0, Total=306 [2024-11-13 15:22:53,941 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 25 out of 77 [2024-11-13 15:22:53,942 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 133 places, 131 transitions, 1179 flow. Second operand has 18 states, 18 states have (on average 27.333333333333332) internal successors, (492), 18 states have internal predecessors, (492), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-13 15:22:53,942 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-13 15:22:53,942 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 25 of 77 [2024-11-13 15:22:53,942 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-13 15:23:03,322 INFO L124 PetriNetUnfolderBase]: 50711/76441 cut-off events. [2024-11-13 15:23:03,322 INFO L125 PetriNetUnfolderBase]: For 96285/97261 co-relation queries the response was YES. [2024-11-13 15:23:03,698 INFO L83 FinitePrefix]: Finished finitePrefix Result has 223599 conditions, 76441 events. 50711/76441 cut-off events. For 96285/97261 co-relation queries the response was YES. Maximal size of possible extension queue 4099. Compared 672161 event pairs, 18887 based on Foata normal form. 780/72423 useless extension candidates. Maximal degree in co-relation 141589. Up to 14418 conditions per place. [2024-11-13 15:23:03,989 INFO L140 encePairwiseOnDemand]: 63/77 looper letters, 237 selfloop transitions, 70 changer transitions 0/322 dead transitions. [2024-11-13 15:23:03,989 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 147 places, 322 transitions, 2589 flow [2024-11-13 15:23:03,989 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2024-11-13 15:23:03,990 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2024-11-13 15:23:03,991 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 590 transitions. [2024-11-13 15:23:03,992 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5108225108225108 [2024-11-13 15:23:03,992 INFO L175 Difference]: Start difference. First operand has 133 places, 131 transitions, 1179 flow. Second operand 15 states and 590 transitions. [2024-11-13 15:23:03,992 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 147 places, 322 transitions, 2589 flow [2024-11-13 15:23:04,151 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 145 places, 322 transitions, 2538 flow, removed 19 selfloop flow, removed 2 redundant places. [2024-11-13 15:23:04,154 INFO L231 Difference]: Finished difference. Result has 148 places, 135 transitions, 1311 flow [2024-11-13 15:23:04,154 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=77, PETRI_DIFFERENCE_MINUEND_FLOW=1142, PETRI_DIFFERENCE_MINUEND_PLACES=131, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=131, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=66, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=63, PETRI_DIFFERENCE_SUBTRAHEND_STATES=15, PETRI_FLOW=1311, PETRI_PLACES=148, PETRI_TRANSITIONS=135} [2024-11-13 15:23:04,155 INFO L277 CegarLoopForPetriNet]: 78 programPoint places, 70 predicate places. [2024-11-13 15:23:04,155 INFO L471 AbstractCegarLoop]: Abstraction has has 148 places, 135 transitions, 1311 flow [2024-11-13 15:23:04,155 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 27.333333333333332) internal successors, (492), 18 states have internal predecessors, (492), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-13 15:23:04,155 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-13 15:23:04,155 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-13 15:23:04,169 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dc9b1bd9-e2b0-426c-b6c3-75a34a205e4c/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2024-11-13 15:23:04,356 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dc9b1bd9-e2b0-426c-b6c3-75a34a205e4c/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable20 [2024-11-13 15:23:04,356 INFO L396 AbstractCegarLoop]: === Iteration 22 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 37 more)] === [2024-11-13 15:23:04,357 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-13 15:23:04,357 INFO L85 PathProgramCache]: Analyzing trace with hash 679451148, now seen corresponding path program 2 times [2024-11-13 15:23:04,357 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-13 15:23:04,357 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [47481071] [2024-11-13 15:23:04,357 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-13 15:23:04,357 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-13 15:23:04,381 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 15:23:04,594 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-11-13 15:23:04,594 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-13 15:23:04,595 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [47481071] [2024-11-13 15:23:04,595 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [47481071] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-13 15:23:04,595 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1924960206] [2024-11-13 15:23:04,595 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-13 15:23:04,595 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-13 15:23:04,595 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dc9b1bd9-e2b0-426c-b6c3-75a34a205e4c/bin/uautomizer-verify-qhAvR1uOyd/z3 [2024-11-13 15:23:04,598 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dc9b1bd9-e2b0-426c-b6c3-75a34a205e4c/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-13 15:23:04,599 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dc9b1bd9-e2b0-426c-b6c3-75a34a205e4c/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2024-11-13 15:23:04,731 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-13 15:23:04,732 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-13 15:23:04,736 INFO L255 TraceCheckSpWp]: Trace formula consists of 227 conjuncts, 10 conjuncts are in the unsatisfiable core [2024-11-13 15:23:04,737 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-13 15:23:05,033 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-11-13 15:23:05,034 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-13 15:23:05,161 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-11-13 15:23:05,161 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1924960206] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-13 15:23:05,161 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-13 15:23:05,161 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 17 [2024-11-13 15:23:05,161 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1851060080] [2024-11-13 15:23:05,161 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-13 15:23:05,161 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2024-11-13 15:23:05,162 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-13 15:23:05,162 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2024-11-13 15:23:05,162 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=231, Unknown=0, NotChecked=0, Total=306 [2024-11-13 15:23:05,431 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 25 out of 77 [2024-11-13 15:23:05,431 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 148 places, 135 transitions, 1311 flow. Second operand has 18 states, 18 states have (on average 27.666666666666668) internal successors, (498), 18 states have internal predecessors, (498), 0 states have call successors, (0), 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 15:23:05,431 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-13 15:23:05,431 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 25 of 77 [2024-11-13 15:23:05,432 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-13 15:23:15,043 INFO L124 PetriNetUnfolderBase]: 49624/72403 cut-off events. [2024-11-13 15:23:15,043 INFO L125 PetriNetUnfolderBase]: For 124803/126543 co-relation queries the response was YES. [2024-11-13 15:23:15,405 INFO L83 FinitePrefix]: Finished finitePrefix Result has 224267 conditions, 72403 events. 49624/72403 cut-off events. For 124803/126543 co-relation queries the response was YES. Maximal size of possible extension queue 3674. Compared 596173 event pairs, 15678 based on Foata normal form. 888/67244 useless extension candidates. Maximal degree in co-relation 191871. Up to 17788 conditions per place. [2024-11-13 15:23:15,713 INFO L140 encePairwiseOnDemand]: 63/77 looper letters, 224 selfloop transitions, 70 changer transitions 0/310 dead transitions. [2024-11-13 15:23:15,713 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 162 places, 310 transitions, 2696 flow [2024-11-13 15:23:15,714 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2024-11-13 15:23:15,714 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2024-11-13 15:23:15,715 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 573 transitions. [2024-11-13 15:23:15,715 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.4961038961038961 [2024-11-13 15:23:15,715 INFO L175 Difference]: Start difference. First operand has 148 places, 135 transitions, 1311 flow. Second operand 15 states and 573 transitions. [2024-11-13 15:23:15,715 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 162 places, 310 transitions, 2696 flow [2024-11-13 15:23:15,832 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 157 places, 310 transitions, 2605 flow, removed 0 selfloop flow, removed 5 redundant places. [2024-11-13 15:23:15,836 INFO L231 Difference]: Finished difference. Result has 159 places, 141 transitions, 1398 flow [2024-11-13 15:23:15,836 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=77, PETRI_DIFFERENCE_MINUEND_FLOW=1232, PETRI_DIFFERENCE_MINUEND_PLACES=143, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=135, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=66, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=68, PETRI_DIFFERENCE_SUBTRAHEND_STATES=15, PETRI_FLOW=1398, PETRI_PLACES=159, PETRI_TRANSITIONS=141} [2024-11-13 15:23:15,837 INFO L277 CegarLoopForPetriNet]: 78 programPoint places, 81 predicate places. [2024-11-13 15:23:15,837 INFO L471 AbstractCegarLoop]: Abstraction has has 159 places, 141 transitions, 1398 flow [2024-11-13 15:23:15,837 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 27.666666666666668) internal successors, (498), 18 states have internal predecessors, (498), 0 states have call successors, (0), 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 15:23:15,837 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-13 15:23:15,837 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-13 15:23:15,851 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dc9b1bd9-e2b0-426c-b6c3-75a34a205e4c/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2024-11-13 15:23:16,038 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dc9b1bd9-e2b0-426c-b6c3-75a34a205e4c/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21 [2024-11-13 15:23:16,039 INFO L396 AbstractCegarLoop]: === Iteration 23 === Targeting thread1Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 37 more)] === [2024-11-13 15:23:16,039 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-13 15:23:16,039 INFO L85 PathProgramCache]: Analyzing trace with hash 1390336476, now seen corresponding path program 3 times [2024-11-13 15:23:16,039 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-13 15:23:16,039 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [730815947] [2024-11-13 15:23:16,039 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-13 15:23:16,039 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-13 15:23:16,055 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 15:23:16,288 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-11-13 15:23:16,288 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-13 15:23:16,288 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [730815947] [2024-11-13 15:23:16,288 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [730815947] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-13 15:23:16,288 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1921553799] [2024-11-13 15:23:16,288 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-13 15:23:16,288 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-13 15:23:16,289 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dc9b1bd9-e2b0-426c-b6c3-75a34a205e4c/bin/uautomizer-verify-qhAvR1uOyd/z3 [2024-11-13 15:23:16,292 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dc9b1bd9-e2b0-426c-b6c3-75a34a205e4c/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-13 15:23:16,293 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dc9b1bd9-e2b0-426c-b6c3-75a34a205e4c/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2024-11-13 15:23:16,410 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2024-11-13 15:23:16,411 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-13 15:23:16,412 INFO L255 TraceCheckSpWp]: Trace formula consists of 203 conjuncts, 20 conjuncts are in the unsatisfiable core [2024-11-13 15:23:16,414 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-13 15:23:16,625 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-11-13 15:23:16,625 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-13 15:23:16,859 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 42 treesize of output 38 [2024-11-13 15:23:16,958 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-11-13 15:23:16,958 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1921553799] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-13 15:23:16,958 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-13 15:23:16,958 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7, 7] total 20 [2024-11-13 15:23:16,959 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [984967230] [2024-11-13 15:23:16,959 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-13 15:23:16,959 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2024-11-13 15:23:16,959 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-13 15:23:16,959 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2024-11-13 15:23:16,960 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=92, Invalid=370, Unknown=0, NotChecked=0, Total=462 [2024-11-13 15:23:17,717 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 25 out of 77 [2024-11-13 15:23:17,718 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 159 places, 141 transitions, 1398 flow. Second operand has 22 states, 22 states have (on average 27.363636363636363) internal successors, (602), 22 states have internal predecessors, (602), 0 states have call successors, (0), 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 15:23:17,718 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-13 15:23:17,718 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 25 of 77 [2024-11-13 15:23:17,718 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand