./Ultimate.py --spec ../../sv-benchmarks/c/properties/valid-memsafety.prp --file ../../sv-benchmarks/c/weaver/popl20-bad-counter-queue.wvr.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for memory safety (deref-memtrack) Using default analysis Version d790fecc Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_30f617b7-f0b1-412a-b7a3-a0ccf9358712/bin/uautomizer-verify-aQ6SnzHsRB/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_30f617b7-f0b1-412a-b7a3-a0ccf9358712/bin/uautomizer-verify-aQ6SnzHsRB/plugins/org.eclipse.equinox.launcher_1.6.800.v20240513-1750.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_30f617b7-f0b1-412a-b7a3-a0ccf9358712/bin/uautomizer-verify-aQ6SnzHsRB/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_30f617b7-f0b1-412a-b7a3-a0ccf9358712/bin/uautomizer-verify-aQ6SnzHsRB/config/AutomizerMemDerefMemtrack.xml -i ../../sv-benchmarks/c/weaver/popl20-bad-counter-queue.wvr.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_30f617b7-f0b1-412a-b7a3-a0ccf9358712/bin/uautomizer-verify-aQ6SnzHsRB/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_30f617b7-f0b1-412a-b7a3-a0ccf9358712/bin/uautomizer-verify-aQ6SnzHsRB --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 387879bf92b16ead997b40b3e249348f8a6b399496756f9bc3c41b6dc3c21353 --- Real Ultimate output --- This is Ultimate 0.3.0-dev-d790fec [2024-11-28 05:25:20,312 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-11-28 05:25:20,397 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_30f617b7-f0b1-412a-b7a3-a0ccf9358712/bin/uautomizer-verify-aQ6SnzHsRB/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2024-11-28 05:25:20,407 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-11-28 05:25:20,407 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-11-28 05:25:20,429 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-11-28 05:25:20,430 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-11-28 05:25:20,431 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-11-28 05:25:20,431 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-11-28 05:25:20,431 INFO L153 SettingsManager]: * Use memory slicer=true [2024-11-28 05:25:20,432 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-11-28 05:25:20,433 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-11-28 05:25:20,433 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-11-28 05:25:20,433 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-11-28 05:25:20,433 INFO L153 SettingsManager]: * Use SBE=true [2024-11-28 05:25:20,434 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-11-28 05:25:20,434 INFO L153 SettingsManager]: * sizeof long=4 [2024-11-28 05:25:20,434 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-11-28 05:25:20,435 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-11-28 05:25:20,435 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-11-28 05:25:20,435 INFO L153 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2024-11-28 05:25:20,435 INFO L153 SettingsManager]: * Bitprecise bitfields=true [2024-11-28 05:25:20,435 INFO L153 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2024-11-28 05:25:20,435 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-11-28 05:25:20,435 INFO L153 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2024-11-28 05:25:20,435 INFO L153 SettingsManager]: * Check unreachability of reach_error function=false [2024-11-28 05:25:20,436 INFO L153 SettingsManager]: * sizeof long double=12 [2024-11-28 05:25:20,436 INFO L153 SettingsManager]: * Behaviour of calls to undefined functions=OVERAPPROXIMATE_BEHAVIOUR [2024-11-28 05:25:20,436 INFO L153 SettingsManager]: * Use constant arrays=true [2024-11-28 05:25:20,436 INFO L151 SettingsManager]: Preferences of IcfgBuilder differ from their defaults: [2024-11-28 05:25:20,436 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-11-28 05:25:20,436 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-11-28 05:25:20,436 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-11-28 05:25:20,436 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-11-28 05:25:20,436 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-11-28 05:25:20,436 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-11-28 05:25:20,437 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-11-28 05:25:20,437 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-11-28 05:25:20,437 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-11-28 05:25:20,437 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-11-28 05:25:20,437 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-11-28 05:25:20,437 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-11-28 05:25:20,437 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-11-28 05:25:20,437 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-11-28 05:25:20,437 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-11-28 05:25:20,437 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-11-28 05:25:20,437 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-11-28 05:25:20,437 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_30f617b7-f0b1-412a-b7a3-a0ccf9358712/bin/uautomizer-verify-aQ6SnzHsRB 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 -> 387879bf92b16ead997b40b3e249348f8a6b399496756f9bc3c41b6dc3c21353 [2024-11-28 05:25:20,759 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-11-28 05:25:20,773 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-11-28 05:25:20,776 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-11-28 05:25:20,778 INFO L270 PluginConnector]: Initializing CDTParser... [2024-11-28 05:25:20,779 INFO L274 PluginConnector]: CDTParser initialized [2024-11-28 05:25:20,781 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_30f617b7-f0b1-412a-b7a3-a0ccf9358712/bin/uautomizer-verify-aQ6SnzHsRB/../../sv-benchmarks/c/weaver/popl20-bad-counter-queue.wvr.c [2024-11-28 05:25:23,926 INFO L533 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_30f617b7-f0b1-412a-b7a3-a0ccf9358712/bin/uautomizer-verify-aQ6SnzHsRB/data/2e7e0ddd8/198c1f52481e4b0fa4c74e63d668943c/FLAGc955f8fff [2024-11-28 05:25:24,188 INFO L384 CDTParser]: Found 1 translation units. [2024-11-28 05:25:24,189 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_30f617b7-f0b1-412a-b7a3-a0ccf9358712/sv-benchmarks/c/weaver/popl20-bad-counter-queue.wvr.c [2024-11-28 05:25:24,204 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_30f617b7-f0b1-412a-b7a3-a0ccf9358712/bin/uautomizer-verify-aQ6SnzHsRB/data/2e7e0ddd8/198c1f52481e4b0fa4c74e63d668943c/FLAGc955f8fff [2024-11-28 05:25:24,230 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_30f617b7-f0b1-412a-b7a3-a0ccf9358712/bin/uautomizer-verify-aQ6SnzHsRB/data/2e7e0ddd8/198c1f52481e4b0fa4c74e63d668943c [2024-11-28 05:25:24,232 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-11-28 05:25:24,234 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2024-11-28 05:25:24,235 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-11-28 05:25:24,235 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-11-28 05:25:24,241 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-11-28 05:25:24,242 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.11 05:25:24" (1/1) ... [2024-11-28 05:25:24,244 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@76b6cbec and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 05:25:24, skipping insertion in model container [2024-11-28 05:25:24,245 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.11 05:25:24" (1/1) ... [2024-11-28 05:25:24,265 INFO L175 MainTranslator]: Built tables and reachable declarations [2024-11-28 05:25:24,480 WARN L1063 CHandler]: saw a pointer cast to a type that we could not get a type size for, not adapting memory model [2024-11-28 05:25:24,490 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-28 05:25:24,501 INFO L200 MainTranslator]: Completed pre-run [2024-11-28 05:25:24,540 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-28 05:25:24,563 INFO L204 MainTranslator]: Completed translation [2024-11-28 05:25:24,564 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 05:25:24 WrapperNode [2024-11-28 05:25:24,564 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-11-28 05:25:24,565 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-11-28 05:25:24,565 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-11-28 05:25:24,566 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-11-28 05:25:24,575 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 05:25:24" (1/1) ... [2024-11-28 05:25:24,587 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 05:25:24" (1/1) ... [2024-11-28 05:25:24,627 INFO L138 Inliner]: procedures = 23, calls = 23, calls flagged for inlining = 13, calls inlined = 13, statements flattened = 133 [2024-11-28 05:25:24,631 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-11-28 05:25:24,633 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-11-28 05:25:24,633 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-11-28 05:25:24,633 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-11-28 05:25:24,642 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 05:25:24" (1/1) ... [2024-11-28 05:25:24,642 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 05:25:24" (1/1) ... [2024-11-28 05:25:24,644 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 05:25:24" (1/1) ... [2024-11-28 05:25:24,670 INFO L175 MemorySlicer]: Split 5 memory accesses to 2 slices as follows [2, 3]. 60 percent of accesses are in the largest equivalence class. The 2 initializations are split as follows [2, 0]. The 1 writes are split as follows [0, 1]. [2024-11-28 05:25:24,671 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 05:25:24" (1/1) ... [2024-11-28 05:25:24,673 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 05:25:24" (1/1) ... [2024-11-28 05:25:24,684 INFO L184 PluginConnector]: Executing the observer ReplaceArrayAssignments from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 05:25:24" (1/1) ... [2024-11-28 05:25:24,685 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 05:25:24" (1/1) ... [2024-11-28 05:25:24,692 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 05:25:24" (1/1) ... [2024-11-28 05:25:24,696 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 05:25:24" (1/1) ... [2024-11-28 05:25:24,698 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 05:25:24" (1/1) ... [2024-11-28 05:25:24,704 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-11-28 05:25:24,705 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-11-28 05:25:24,705 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-11-28 05:25:24,705 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-11-28 05:25:24,706 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 05:25:24" (1/1) ... [2024-11-28 05:25:24,715 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-11-28 05:25:24,729 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_30f617b7-f0b1-412a-b7a3-a0ccf9358712/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 05:25:24,747 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_30f617b7-f0b1-412a-b7a3-a0ccf9358712/bin/uautomizer-verify-aQ6SnzHsRB/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (exit command is (exit), workingDir is null) [2024-11-28 05:25:24,750 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_30f617b7-f0b1-412a-b7a3-a0ccf9358712/bin/uautomizer-verify-aQ6SnzHsRB/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Waiting until timeout for monitored process [2024-11-28 05:25:24,781 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-11-28 05:25:24,781 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2024-11-28 05:25:24,782 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2024-11-28 05:25:24,782 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2024-11-28 05:25:24,782 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2024-11-28 05:25:24,782 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-11-28 05:25:24,782 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#1 [2024-11-28 05:25:24,782 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#0 [2024-11-28 05:25:24,782 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#1 [2024-11-28 05:25:24,782 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2024-11-28 05:25:24,782 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-11-28 05:25:24,782 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-11-28 05:25:24,782 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#0 [2024-11-28 05:25:24,782 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#1 [2024-11-28 05:25:24,785 WARN L203 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement. [2024-11-28 05:25:24,916 INFO L234 CfgBuilder]: Building ICFG [2024-11-28 05:25:24,919 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2024-11-28 05:25:25,330 INFO L279 CfgBuilder]: Omitted future-live optimization because the input is a concurrent program. [2024-11-28 05:25:25,330 INFO L283 CfgBuilder]: Performing block encoding [2024-11-28 05:25:25,682 INFO L307 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-11-28 05:25:25,683 INFO L312 CfgBuilder]: Removed 3 assume(true) statements. [2024-11-28 05:25:25,683 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.11 05:25:25 BoogieIcfgContainer [2024-11-28 05:25:25,684 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-11-28 05:25:25,687 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-11-28 05:25:25,689 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-11-28 05:25:25,695 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-11-28 05:25:25,695 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 28.11 05:25:24" (1/3) ... [2024-11-28 05:25:25,696 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@12150937 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 28.11 05:25:25, skipping insertion in model container [2024-11-28 05:25:25,696 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 05:25:24" (2/3) ... [2024-11-28 05:25:25,698 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@12150937 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 28.11 05:25:25, skipping insertion in model container [2024-11-28 05:25:25,698 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.11 05:25:25" (3/3) ... [2024-11-28 05:25:25,700 INFO L128 eAbstractionObserver]: Analyzing ICFG popl20-bad-counter-queue.wvr.c [2024-11-28 05:25:25,717 INFO L216 ceAbstractionStarter]: Automizer settings: Hoare:None NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-11-28 05:25:25,718 INFO L151 ceAbstractionStarter]: Applying trace abstraction to ICFG popl20-bad-counter-queue.wvr.c that has 3 procedures, 33 locations, 1 initial locations, 3 loop locations, and 8 error locations. [2024-11-28 05:25:25,719 INFO L491 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2024-11-28 05:25:25,807 INFO L143 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2024-11-28 05:25:25,854 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 39 places, 35 transitions, 84 flow [2024-11-28 05:25:25,890 INFO L124 PetriNetUnfolderBase]: 3/33 cut-off events. [2024-11-28 05:25:25,893 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2024-11-28 05:25:25,897 INFO L83 FinitePrefix]: Finished finitePrefix Result has 42 conditions, 33 events. 3/33 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 54 event pairs, 0 based on Foata normal form. 0/22 useless extension candidates. Maximal degree in co-relation 21. Up to 2 conditions per place. [2024-11-28 05:25:25,898 INFO L82 GeneralOperation]: Start removeDead. Operand has 39 places, 35 transitions, 84 flow [2024-11-28 05:25:25,902 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 36 places, 32 transitions, 76 flow [2024-11-28 05:25:25,916 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-11-28 05:25:25,938 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;@40daf6f6, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-11-28 05:25:25,939 INFO L334 AbstractCegarLoop]: Starting to check reachability of 14 error locations. [2024-11-28 05:25:25,943 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2024-11-28 05:25:25,947 INFO L124 PetriNetUnfolderBase]: 1/4 cut-off events. [2024-11-28 05:25:25,947 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-11-28 05:25:25,947 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-28 05:25:25,948 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2024-11-28 05:25:25,948 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 11 more)] === [2024-11-28 05:25:25,954 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 05:25:25,954 INFO L85 PathProgramCache]: Analyzing trace with hash 454002, now seen corresponding path program 1 times [2024-11-28 05:25:25,962 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 05:25:25,963 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2129991722] [2024-11-28 05:25:25,963 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-28 05:25:25,964 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 05:25:26,065 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 05:25:26,250 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-28 05:25:26,253 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 05:25:26,254 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2129991722] [2024-11-28 05:25:26,254 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2129991722] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-28 05:25:26,254 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-28 05:25:26,255 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2024-11-28 05:25:26,256 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [999105203] [2024-11-28 05:25:26,260 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-28 05:25:26,268 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-28 05:25:26,273 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 05:25:26,300 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-28 05:25:26,301 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-28 05:25:26,325 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 35 [2024-11-28 05:25:26,327 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 36 places, 32 transitions, 76 flow. Second operand has 3 states, 3 states have (on average 14.0) internal successors, (42), 3 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 05:25:26,329 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-28 05:25:26,329 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 35 [2024-11-28 05:25:26,330 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-28 05:25:26,474 INFO L124 PetriNetUnfolderBase]: 62/137 cut-off events. [2024-11-28 05:25:26,475 INFO L125 PetriNetUnfolderBase]: For 10/10 co-relation queries the response was YES. [2024-11-28 05:25:26,476 INFO L83 FinitePrefix]: Finished finitePrefix Result has 267 conditions, 137 events. 62/137 cut-off events. For 10/10 co-relation queries the response was YES. Maximal size of possible extension queue 19. Compared 487 event pairs, 42 based on Foata normal form. 1/121 useless extension candidates. Maximal degree in co-relation 224. Up to 109 conditions per place. [2024-11-28 05:25:26,480 INFO L140 encePairwiseOnDemand]: 31/35 looper letters, 17 selfloop transitions, 2 changer transitions 0/29 dead transitions. [2024-11-28 05:25:26,480 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 35 places, 29 transitions, 108 flow [2024-11-28 05:25:26,483 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-28 05:25:26,486 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-11-28 05:25:26,496 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 60 transitions. [2024-11-28 05:25:26,497 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.5714285714285714 [2024-11-28 05:25:26,499 INFO L175 Difference]: Start difference. First operand has 36 places, 32 transitions, 76 flow. Second operand 3 states and 60 transitions. [2024-11-28 05:25:26,500 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 35 places, 29 transitions, 108 flow [2024-11-28 05:25:26,506 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 31 places, 29 transitions, 100 flow, removed 0 selfloop flow, removed 4 redundant places. [2024-11-28 05:25:26,511 INFO L231 Difference]: Finished difference. Result has 31 places, 29 transitions, 66 flow [2024-11-28 05:25:26,515 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=35, PETRI_DIFFERENCE_MINUEND_FLOW=62, PETRI_DIFFERENCE_MINUEND_PLACES=29, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=29, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=27, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=66, PETRI_PLACES=31, PETRI_TRANSITIONS=29} [2024-11-28 05:25:26,518 INFO L279 CegarLoopForPetriNet]: 36 programPoint places, -5 predicate places. [2024-11-28 05:25:26,520 INFO L471 AbstractCegarLoop]: Abstraction has has 31 places, 29 transitions, 66 flow [2024-11-28 05:25:26,520 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 14.0) internal successors, (42), 3 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 05:25:26,520 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-28 05:25:26,520 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2024-11-28 05:25:26,521 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-11-28 05:25:26,521 INFO L396 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 11 more)] === [2024-11-28 05:25:26,521 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 05:25:26,521 INFO L85 PathProgramCache]: Analyzing trace with hash 454003, now seen corresponding path program 1 times [2024-11-28 05:25:26,521 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 05:25:26,521 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [58697651] [2024-11-28 05:25:26,522 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-28 05:25:26,522 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 05:25:26,571 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 05:25:26,898 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-28 05:25:26,898 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 05:25:26,899 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [58697651] [2024-11-28 05:25:26,899 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [58697651] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-28 05:25:26,899 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-28 05:25:26,899 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-11-28 05:25:26,899 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1877857441] [2024-11-28 05:25:26,899 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-28 05:25:26,901 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-28 05:25:26,901 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 05:25:26,901 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-28 05:25:26,901 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-11-28 05:25:26,925 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 35 [2024-11-28 05:25:26,926 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 31 places, 29 transitions, 66 flow. Second operand has 4 states, 4 states have (on average 13.75) internal successors, (55), 4 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 05:25:26,926 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-28 05:25:26,926 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 35 [2024-11-28 05:25:26,926 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-28 05:25:27,070 INFO L124 PetriNetUnfolderBase]: 63/140 cut-off events. [2024-11-28 05:25:27,071 INFO L125 PetriNetUnfolderBase]: For 1/1 co-relation queries the response was YES. [2024-11-28 05:25:27,071 INFO L83 FinitePrefix]: Finished finitePrefix Result has 266 conditions, 140 events. 63/140 cut-off events. For 1/1 co-relation queries the response was YES. Maximal size of possible extension queue 19. Compared 505 event pairs, 42 based on Foata normal form. 0/123 useless extension candidates. Maximal degree in co-relation 244. Up to 114 conditions per place. [2024-11-28 05:25:27,072 INFO L140 encePairwiseOnDemand]: 30/35 looper letters, 19 selfloop transitions, 4 changer transitions 0/32 dead transitions. [2024-11-28 05:25:27,073 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 34 places, 32 transitions, 120 flow [2024-11-28 05:25:27,073 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-11-28 05:25:27,073 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-11-28 05:25:27,075 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 76 transitions. [2024-11-28 05:25:27,076 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.5428571428571428 [2024-11-28 05:25:27,076 INFO L175 Difference]: Start difference. First operand has 31 places, 29 transitions, 66 flow. Second operand 4 states and 76 transitions. [2024-11-28 05:25:27,076 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 34 places, 32 transitions, 120 flow [2024-11-28 05:25:27,076 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 32 places, 32 transitions, 114 flow, removed 0 selfloop flow, removed 2 redundant places. [2024-11-28 05:25:27,079 INFO L231 Difference]: Finished difference. Result has 34 places, 32 transitions, 89 flow [2024-11-28 05:25:27,079 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=35, PETRI_DIFFERENCE_MINUEND_FLOW=62, PETRI_DIFFERENCE_MINUEND_PLACES=29, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=29, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=25, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=89, PETRI_PLACES=34, PETRI_TRANSITIONS=32} [2024-11-28 05:25:27,081 INFO L279 CegarLoopForPetriNet]: 36 programPoint places, -2 predicate places. [2024-11-28 05:25:27,081 INFO L471 AbstractCegarLoop]: Abstraction has has 34 places, 32 transitions, 89 flow [2024-11-28 05:25:27,081 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 13.75) internal successors, (55), 4 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 05:25:27,081 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-28 05:25:27,081 INFO L206 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1] [2024-11-28 05:25:27,081 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-11-28 05:25:27,081 INFO L396 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 11 more)] === [2024-11-28 05:25:27,082 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 05:25:27,083 INFO L85 PathProgramCache]: Analyzing trace with hash 436310748, now seen corresponding path program 1 times [2024-11-28 05:25:27,083 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 05:25:27,083 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [495729288] [2024-11-28 05:25:27,083 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-28 05:25:27,083 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 05:25:27,123 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 05:25:27,624 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-28 05:25:27,624 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 05:25:27,624 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [495729288] [2024-11-28 05:25:27,624 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [495729288] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-28 05:25:27,624 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1041982752] [2024-11-28 05:25:27,624 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-28 05:25:27,624 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 05:25:27,624 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_30f617b7-f0b1-412a-b7a3-a0ccf9358712/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 05:25:27,628 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_30f617b7-f0b1-412a-b7a3-a0ccf9358712/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 05:25:27,632 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_30f617b7-f0b1-412a-b7a3-a0ccf9358712/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2024-11-28 05:25:27,726 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 05:25:27,728 INFO L256 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 19 conjuncts are in the unsatisfiable core [2024-11-28 05:25:27,734 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 05:25:27,818 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 [2024-11-28 05:25:28,159 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-28 05:25:28,159 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-28 05:25:28,326 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-28 05:25:28,327 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1041982752] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-28 05:25:28,327 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-28 05:25:28,327 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 9 [2024-11-28 05:25:28,327 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1588788240] [2024-11-28 05:25:28,327 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-28 05:25:28,328 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-11-28 05:25:28,329 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 05:25:28,329 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-11-28 05:25:28,330 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=76, Unknown=0, NotChecked=0, Total=110 [2024-11-28 05:25:28,438 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 35 [2024-11-28 05:25:28,438 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 34 places, 32 transitions, 89 flow. Second operand has 11 states, 11 states have (on average 14.363636363636363) internal successors, (158), 11 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) [2024-11-28 05:25:28,438 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-28 05:25:28,439 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 35 [2024-11-28 05:25:28,439 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-28 05:25:28,774 INFO L124 PetriNetUnfolderBase]: 64/142 cut-off events. [2024-11-28 05:25:28,774 INFO L125 PetriNetUnfolderBase]: For 1/1 co-relation queries the response was YES. [2024-11-28 05:25:28,775 INFO L83 FinitePrefix]: Finished finitePrefix Result has 282 conditions, 142 events. 64/142 cut-off events. For 1/1 co-relation queries the response was YES. Maximal size of possible extension queue 19. Compared 500 event pairs, 42 based on Foata normal form. 0/124 useless extension candidates. Maximal degree in co-relation 251. Up to 111 conditions per place. [2024-11-28 05:25:28,776 INFO L140 encePairwiseOnDemand]: 30/35 looper letters, 15 selfloop transitions, 10 changer transitions 0/34 dead transitions. [2024-11-28 05:25:28,776 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 40 places, 34 transitions, 147 flow [2024-11-28 05:25:28,777 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-11-28 05:25:28,777 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-11-28 05:25:28,778 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 131 transitions. [2024-11-28 05:25:28,778 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.46785714285714286 [2024-11-28 05:25:28,779 INFO L175 Difference]: Start difference. First operand has 34 places, 32 transitions, 89 flow. Second operand 8 states and 131 transitions. [2024-11-28 05:25:28,779 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 40 places, 34 transitions, 147 flow [2024-11-28 05:25:28,779 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 39 places, 34 transitions, 144 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-11-28 05:25:28,781 INFO L231 Difference]: Finished difference. Result has 39 places, 34 transitions, 114 flow [2024-11-28 05:25:28,781 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=35, PETRI_DIFFERENCE_MINUEND_FLOW=82, PETRI_DIFFERENCE_MINUEND_PLACES=32, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=31, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=24, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=114, PETRI_PLACES=39, PETRI_TRANSITIONS=34} [2024-11-28 05:25:28,782 INFO L279 CegarLoopForPetriNet]: 36 programPoint places, 3 predicate places. [2024-11-28 05:25:28,782 INFO L471 AbstractCegarLoop]: Abstraction has has 39 places, 34 transitions, 114 flow [2024-11-28 05:25:28,782 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 14.363636363636363) internal successors, (158), 11 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) [2024-11-28 05:25:28,782 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-28 05:25:28,782 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1] [2024-11-28 05:25:28,793 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_30f617b7-f0b1-412a-b7a3-a0ccf9358712/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2024-11-28 05:25:28,986 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_30f617b7-f0b1-412a-b7a3-a0ccf9358712/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2 [2024-11-28 05:25:28,986 INFO L396 AbstractCegarLoop]: === Iteration 4 === Targeting thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 11 more)] === [2024-11-28 05:25:28,987 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 05:25:28,987 INFO L85 PathProgramCache]: Analyzing trace with hash 642755290, now seen corresponding path program 1 times [2024-11-28 05:25:28,987 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 05:25:28,987 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [131901329] [2024-11-28 05:25:28,987 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-28 05:25:28,987 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 05:25:29,006 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 05:25:29,096 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-28 05:25:29,096 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 05:25:29,096 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [131901329] [2024-11-28 05:25:29,096 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [131901329] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-28 05:25:29,097 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-28 05:25:29,097 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-11-28 05:25:29,097 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2095222362] [2024-11-28 05:25:29,097 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-28 05:25:29,097 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-28 05:25:29,097 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 05:25:29,098 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-28 05:25:29,098 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-11-28 05:25:29,116 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 35 [2024-11-28 05:25:29,116 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 39 places, 34 transitions, 114 flow. Second operand has 4 states, 4 states have (on average 12.25) internal successors, (49), 4 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 05:25:29,116 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-28 05:25:29,116 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 35 [2024-11-28 05:25:29,117 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-28 05:25:29,203 INFO L124 PetriNetUnfolderBase]: 64/136 cut-off events. [2024-11-28 05:25:29,203 INFO L125 PetriNetUnfolderBase]: For 1/1 co-relation queries the response was YES. [2024-11-28 05:25:29,204 INFO L83 FinitePrefix]: Finished finitePrefix Result has 284 conditions, 136 events. 64/136 cut-off events. For 1/1 co-relation queries the response was YES. Maximal size of possible extension queue 17. Compared 456 event pairs, 42 based on Foata normal form. 0/124 useless extension candidates. Maximal degree in co-relation 246. Up to 110 conditions per place. [2024-11-28 05:25:29,205 INFO L140 encePairwiseOnDemand]: 31/35 looper letters, 21 selfloop transitions, 4 changer transitions 0/32 dead transitions. [2024-11-28 05:25:29,205 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 40 places, 32 transitions, 160 flow [2024-11-28 05:25:29,206 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-11-28 05:25:29,206 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-11-28 05:25:29,207 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 65 transitions. [2024-11-28 05:25:29,207 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.4642857142857143 [2024-11-28 05:25:29,207 INFO L175 Difference]: Start difference. First operand has 39 places, 34 transitions, 114 flow. Second operand 4 states and 65 transitions. [2024-11-28 05:25:29,207 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 40 places, 32 transitions, 160 flow [2024-11-28 05:25:29,208 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 33 places, 32 transitions, 118 flow, removed 6 selfloop flow, removed 7 redundant places. [2024-11-28 05:25:29,209 INFO L231 Difference]: Finished difference. Result has 33 places, 32 transitions, 76 flow [2024-11-28 05:25:29,209 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=35, PETRI_DIFFERENCE_MINUEND_FLOW=68, PETRI_DIFFERENCE_MINUEND_PLACES=30, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=32, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=28, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=76, PETRI_PLACES=33, PETRI_TRANSITIONS=32} [2024-11-28 05:25:29,210 INFO L279 CegarLoopForPetriNet]: 36 programPoint places, -3 predicate places. [2024-11-28 05:25:29,210 INFO L471 AbstractCegarLoop]: Abstraction has has 33 places, 32 transitions, 76 flow [2024-11-28 05:25:29,211 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 12.25) internal successors, (49), 4 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 05:25:29,211 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-28 05:25:29,211 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1] [2024-11-28 05:25:29,211 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2024-11-28 05:25:29,212 INFO L396 AbstractCegarLoop]: === Iteration 5 === Targeting thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 11 more)] === [2024-11-28 05:25:29,212 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 05:25:29,212 INFO L85 PathProgramCache]: Analyzing trace with hash 642755291, now seen corresponding path program 1 times [2024-11-28 05:25:29,212 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 05:25:29,213 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [318529684] [2024-11-28 05:25:29,213 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-28 05:25:29,213 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 05:25:29,226 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 05:25:29,308 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-28 05:25:29,309 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 05:25:29,309 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [318529684] [2024-11-28 05:25:29,309 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [318529684] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-28 05:25:29,309 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-28 05:25:29,309 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-11-28 05:25:29,309 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1554272631] [2024-11-28 05:25:29,310 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-28 05:25:29,310 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-11-28 05:25:29,310 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 05:25:29,310 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-11-28 05:25:29,311 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2024-11-28 05:25:29,328 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 35 [2024-11-28 05:25:29,328 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 33 places, 32 transitions, 76 flow. Second operand has 5 states, 5 states have (on average 14.0) internal successors, (70), 5 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 05:25:29,328 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-28 05:25:29,329 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 35 [2024-11-28 05:25:29,329 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-28 05:25:29,480 INFO L124 PetriNetUnfolderBase]: 114/245 cut-off events. [2024-11-28 05:25:29,481 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2024-11-28 05:25:29,481 INFO L83 FinitePrefix]: Finished finitePrefix Result has 476 conditions, 245 events. 114/245 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 24. Compared 981 event pairs, 72 based on Foata normal form. 0/224 useless extension candidates. Maximal degree in co-relation 292. Up to 139 conditions per place. [2024-11-28 05:25:29,483 INFO L140 encePairwiseOnDemand]: 29/35 looper letters, 41 selfloop transitions, 5 changer transitions 0/52 dead transitions. [2024-11-28 05:25:29,483 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 37 places, 52 transitions, 213 flow [2024-11-28 05:25:29,483 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-11-28 05:25:29,484 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-11-28 05:25:29,484 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 109 transitions. [2024-11-28 05:25:29,485 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.6228571428571429 [2024-11-28 05:25:29,485 INFO L175 Difference]: Start difference. First operand has 33 places, 32 transitions, 76 flow. Second operand 5 states and 109 transitions. [2024-11-28 05:25:29,485 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 37 places, 52 transitions, 213 flow [2024-11-28 05:25:29,486 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 35 places, 52 transitions, 208 flow, removed 0 selfloop flow, removed 2 redundant places. [2024-11-28 05:25:29,487 INFO L231 Difference]: Finished difference. Result has 37 places, 34 transitions, 96 flow [2024-11-28 05:25:29,487 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=35, PETRI_DIFFERENCE_MINUEND_FLOW=71, PETRI_DIFFERENCE_MINUEND_PLACES=31, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=32, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=27, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=96, PETRI_PLACES=37, PETRI_TRANSITIONS=34} [2024-11-28 05:25:29,488 INFO L279 CegarLoopForPetriNet]: 36 programPoint places, 1 predicate places. [2024-11-28 05:25:29,488 INFO L471 AbstractCegarLoop]: Abstraction has has 37 places, 34 transitions, 96 flow [2024-11-28 05:25:29,488 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 14.0) internal successors, (70), 5 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 05:25:29,488 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-28 05:25:29,488 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 05:25:29,489 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2024-11-28 05:25:29,489 INFO L396 AbstractCegarLoop]: === Iteration 6 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 11 more)] === [2024-11-28 05:25:29,489 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 05:25:29,489 INFO L85 PathProgramCache]: Analyzing trace with hash -797984060, now seen corresponding path program 1 times [2024-11-28 05:25:29,489 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 05:25:29,489 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [143961243] [2024-11-28 05:25:29,489 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-28 05:25:29,490 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 05:25:29,506 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 05:25:29,606 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-28 05:25:29,606 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 05:25:29,606 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [143961243] [2024-11-28 05:25:29,606 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [143961243] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-28 05:25:29,607 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-28 05:25:29,607 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-11-28 05:25:29,607 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1950159729] [2024-11-28 05:25:29,607 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-28 05:25:29,607 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-11-28 05:25:29,608 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 05:25:29,608 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-11-28 05:25:29,609 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2024-11-28 05:25:29,630 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 35 [2024-11-28 05:25:29,630 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 37 places, 34 transitions, 96 flow. Second operand has 5 states, 5 states have (on average 14.4) internal successors, (72), 5 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 05:25:29,631 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-28 05:25:29,631 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 35 [2024-11-28 05:25:29,631 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-28 05:25:29,767 INFO L124 PetriNetUnfolderBase]: 98/214 cut-off events. [2024-11-28 05:25:29,768 INFO L125 PetriNetUnfolderBase]: For 68/77 co-relation queries the response was YES. [2024-11-28 05:25:29,769 INFO L83 FinitePrefix]: Finished finitePrefix Result has 482 conditions, 214 events. 98/214 cut-off events. For 68/77 co-relation queries the response was YES. Maximal size of possible extension queue 19. Compared 797 event pairs, 67 based on Foata normal form. 0/200 useless extension candidates. Maximal degree in co-relation 326. Up to 137 conditions per place. [2024-11-28 05:25:29,770 INFO L140 encePairwiseOnDemand]: 29/35 looper letters, 36 selfloop transitions, 5 changer transitions 0/47 dead transitions. [2024-11-28 05:25:29,770 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 41 places, 47 transitions, 217 flow [2024-11-28 05:25:29,771 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-11-28 05:25:29,771 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-11-28 05:25:29,772 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 104 transitions. [2024-11-28 05:25:29,772 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.5942857142857143 [2024-11-28 05:25:29,772 INFO L175 Difference]: Start difference. First operand has 37 places, 34 transitions, 96 flow. Second operand 5 states and 104 transitions. [2024-11-28 05:25:29,772 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 41 places, 47 transitions, 217 flow [2024-11-28 05:25:29,774 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 39 places, 47 transitions, 212 flow, removed 0 selfloop flow, removed 2 redundant places. [2024-11-28 05:25:29,775 INFO L231 Difference]: Finished difference. Result has 41 places, 36 transitions, 116 flow [2024-11-28 05:25:29,775 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=35, PETRI_DIFFERENCE_MINUEND_FLOW=91, PETRI_DIFFERENCE_MINUEND_PLACES=35, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=34, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=29, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=116, PETRI_PLACES=41, PETRI_TRANSITIONS=36} [2024-11-28 05:25:29,776 INFO L279 CegarLoopForPetriNet]: 36 programPoint places, 5 predicate places. [2024-11-28 05:25:29,776 INFO L471 AbstractCegarLoop]: Abstraction has has 41 places, 36 transitions, 116 flow [2024-11-28 05:25:29,776 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 14.4) internal successors, (72), 5 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 05:25:29,776 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-28 05:25:29,776 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 05:25:29,777 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2024-11-28 05:25:29,777 INFO L396 AbstractCegarLoop]: === Iteration 7 === Targeting thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 11 more)] === [2024-11-28 05:25:29,777 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 05:25:29,777 INFO L85 PathProgramCache]: Analyzing trace with hash 1564909778, now seen corresponding path program 1 times [2024-11-28 05:25:29,777 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 05:25:29,777 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [917869886] [2024-11-28 05:25:29,777 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-28 05:25:29,778 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 05:25:29,791 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 05:25:30,056 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-28 05:25:30,057 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 05:25:30,057 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [917869886] [2024-11-28 05:25:30,057 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [917869886] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-28 05:25:30,057 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [622238837] [2024-11-28 05:25:30,057 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-28 05:25:30,057 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 05:25:30,058 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_30f617b7-f0b1-412a-b7a3-a0ccf9358712/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 05:25:30,060 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_30f617b7-f0b1-412a-b7a3-a0ccf9358712/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 05:25:30,065 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_30f617b7-f0b1-412a-b7a3-a0ccf9358712/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2024-11-28 05:25:30,135 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 05:25:30,136 INFO L256 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 14 conjuncts are in the unsatisfiable core [2024-11-28 05:25:30,137 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 05:25:30,246 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-28 05:25:30,247 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-28 05:25:30,315 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 22 treesize of output 18 [2024-11-28 05:25:30,331 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-28 05:25:30,331 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [622238837] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-28 05:25:30,331 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-28 05:25:30,331 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 9 [2024-11-28 05:25:30,331 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [43409345] [2024-11-28 05:25:30,331 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-28 05:25:30,332 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-11-28 05:25:30,332 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 05:25:30,332 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-11-28 05:25:30,332 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=82, Unknown=0, NotChecked=0, Total=110 [2024-11-28 05:25:30,477 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 35 [2024-11-28 05:25:30,477 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 41 places, 36 transitions, 116 flow. Second operand has 11 states, 11 states have (on average 14.454545454545455) internal successors, (159), 11 states have internal predecessors, (159), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 05:25:30,477 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-28 05:25:30,477 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 35 [2024-11-28 05:25:30,477 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-28 05:25:30,840 INFO L124 PetriNetUnfolderBase]: 137/296 cut-off events. [2024-11-28 05:25:30,841 INFO L125 PetriNetUnfolderBase]: For 112/125 co-relation queries the response was YES. [2024-11-28 05:25:30,842 INFO L83 FinitePrefix]: Finished finitePrefix Result has 708 conditions, 296 events. 137/296 cut-off events. For 112/125 co-relation queries the response was YES. Maximal size of possible extension queue 21. Compared 1213 event pairs, 64 based on Foata normal form. 0/275 useless extension candidates. Maximal degree in co-relation 521. Up to 119 conditions per place. [2024-11-28 05:25:30,844 INFO L140 encePairwiseOnDemand]: 27/35 looper letters, 44 selfloop transitions, 10 changer transitions 0/60 dead transitions. [2024-11-28 05:25:30,844 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 47 places, 60 transitions, 288 flow [2024-11-28 05:25:30,844 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-11-28 05:25:30,845 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-11-28 05:25:30,846 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 143 transitions. [2024-11-28 05:25:30,846 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.5836734693877551 [2024-11-28 05:25:30,846 INFO L175 Difference]: Start difference. First operand has 41 places, 36 transitions, 116 flow. Second operand 7 states and 143 transitions. [2024-11-28 05:25:30,846 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 47 places, 60 transitions, 288 flow [2024-11-28 05:25:30,848 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 45 places, 60 transitions, 283 flow, removed 0 selfloop flow, removed 2 redundant places. [2024-11-28 05:25:30,849 INFO L231 Difference]: Finished difference. Result has 47 places, 39 transitions, 155 flow [2024-11-28 05:25:30,850 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=35, PETRI_DIFFERENCE_MINUEND_FLOW=111, PETRI_DIFFERENCE_MINUEND_PLACES=39, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=36, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=27, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=155, PETRI_PLACES=47, PETRI_TRANSITIONS=39} [2024-11-28 05:25:30,850 INFO L279 CegarLoopForPetriNet]: 36 programPoint places, 11 predicate places. [2024-11-28 05:25:30,851 INFO L471 AbstractCegarLoop]: Abstraction has has 47 places, 39 transitions, 155 flow [2024-11-28 05:25:30,851 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 14.454545454545455) internal successors, (159), 11 states have internal predecessors, (159), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 05:25:30,851 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-28 05:25:30,851 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 05:25:30,861 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_30f617b7-f0b1-412a-b7a3-a0ccf9358712/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2024-11-28 05:25:31,054 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_30f617b7-f0b1-412a-b7a3-a0ccf9358712/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6 [2024-11-28 05:25:31,054 INFO L396 AbstractCegarLoop]: === Iteration 8 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 11 more)] === [2024-11-28 05:25:31,055 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 05:25:31,055 INFO L85 PathProgramCache]: Analyzing trace with hash 629214971, now seen corresponding path program 1 times [2024-11-28 05:25:31,056 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 05:25:31,057 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1811615940] [2024-11-28 05:25:31,057 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-28 05:25:31,057 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 05:25:31,081 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 05:25:31,327 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-28 05:25:31,327 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 05:25:31,327 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1811615940] [2024-11-28 05:25:31,327 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1811615940] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-28 05:25:31,327 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1981505835] [2024-11-28 05:25:31,332 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-28 05:25:31,332 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 05:25:31,333 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_30f617b7-f0b1-412a-b7a3-a0ccf9358712/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 05:25:31,335 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_30f617b7-f0b1-412a-b7a3-a0ccf9358712/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 05:25:31,340 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_30f617b7-f0b1-412a-b7a3-a0ccf9358712/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2024-11-28 05:25:31,413 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 05:25:31,417 INFO L256 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 15 conjuncts are in the unsatisfiable core [2024-11-28 05:25:31,418 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 05:25:31,429 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 8 treesize of output 1 [2024-11-28 05:25:31,539 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-28 05:25:31,539 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-28 05:25:31,642 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-28 05:25:31,642 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1981505835] provided 1 perfect and 1 imperfect interpolant sequences [2024-11-28 05:25:31,643 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2024-11-28 05:25:31,643 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [4, 4] total 10 [2024-11-28 05:25:31,643 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1378559206] [2024-11-28 05:25:31,643 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-28 05:25:31,643 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-11-28 05:25:31,644 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 05:25:31,644 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-11-28 05:25:31,644 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=98, Unknown=0, NotChecked=0, Total=132 [2024-11-28 05:25:31,706 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 35 [2024-11-28 05:25:31,707 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 47 places, 39 transitions, 155 flow. Second operand has 6 states, 6 states have (on average 14.5) internal successors, (87), 6 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 05:25:31,707 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-28 05:25:31,707 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 35 [2024-11-28 05:25:31,707 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-28 05:25:31,913 INFO L124 PetriNetUnfolderBase]: 178/351 cut-off events. [2024-11-28 05:25:31,913 INFO L125 PetriNetUnfolderBase]: For 413/445 co-relation queries the response was YES. [2024-11-28 05:25:31,914 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1008 conditions, 351 events. 178/351 cut-off events. For 413/445 co-relation queries the response was YES. Maximal size of possible extension queue 23. Compared 1405 event pairs, 88 based on Foata normal form. 0/328 useless extension candidates. Maximal degree in co-relation 802. Up to 167 conditions per place. [2024-11-28 05:25:31,916 INFO L140 encePairwiseOnDemand]: 27/35 looper letters, 42 selfloop transitions, 9 changer transitions 0/57 dead transitions. [2024-11-28 05:25:31,916 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 52 places, 57 transitions, 328 flow [2024-11-28 05:25:31,917 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-11-28 05:25:31,917 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-11-28 05:25:31,918 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 121 transitions. [2024-11-28 05:25:31,918 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.5761904761904761 [2024-11-28 05:25:31,918 INFO L175 Difference]: Start difference. First operand has 47 places, 39 transitions, 155 flow. Second operand 6 states and 121 transitions. [2024-11-28 05:25:31,918 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 52 places, 57 transitions, 328 flow [2024-11-28 05:25:31,920 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 48 places, 57 transitions, 313 flow, removed 2 selfloop flow, removed 4 redundant places. [2024-11-28 05:25:31,922 INFO L231 Difference]: Finished difference. Result has 50 places, 41 transitions, 182 flow [2024-11-28 05:25:31,922 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=35, PETRI_DIFFERENCE_MINUEND_FLOW=142, PETRI_DIFFERENCE_MINUEND_PLACES=43, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=39, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=30, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=182, PETRI_PLACES=50, PETRI_TRANSITIONS=41} [2024-11-28 05:25:31,922 INFO L279 CegarLoopForPetriNet]: 36 programPoint places, 14 predicate places. [2024-11-28 05:25:31,923 INFO L471 AbstractCegarLoop]: Abstraction has has 50 places, 41 transitions, 182 flow [2024-11-28 05:25:31,924 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 14.5) internal successors, (87), 6 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 05:25:31,924 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-28 05:25:31,925 INFO L206 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 05:25:31,935 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_30f617b7-f0b1-412a-b7a3-a0ccf9358712/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2024-11-28 05:25:32,129 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_30f617b7-f0b1-412a-b7a3-a0ccf9358712/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 05:25:32,129 INFO L396 AbstractCegarLoop]: === Iteration 9 === Targeting thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 11 more)] === [2024-11-28 05:25:32,130 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 05:25:32,130 INFO L85 PathProgramCache]: Analyzing trace with hash 627132343, now seen corresponding path program 1 times [2024-11-28 05:25:32,130 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 05:25:32,130 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [158124449] [2024-11-28 05:25:32,130 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-28 05:25:32,130 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 05:25:32,149 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 05:25:32,277 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 4 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-28 05:25:32,277 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 05:25:32,278 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [158124449] [2024-11-28 05:25:32,278 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [158124449] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-28 05:25:32,278 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [360751254] [2024-11-28 05:25:32,278 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-28 05:25:32,278 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 05:25:32,278 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_30f617b7-f0b1-412a-b7a3-a0ccf9358712/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 05:25:32,281 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_30f617b7-f0b1-412a-b7a3-a0ccf9358712/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 05:25:32,285 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_30f617b7-f0b1-412a-b7a3-a0ccf9358712/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2024-11-28 05:25:32,352 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 05:25:32,353 INFO L256 TraceCheckSpWp]: Trace formula consists of 107 conjuncts, 8 conjuncts are in the unsatisfiable core [2024-11-28 05:25:32,354 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 05:25:32,454 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 5 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-28 05:25:32,454 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-28 05:25:32,543 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 5 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-28 05:25:32,544 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [360751254] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-28 05:25:32,544 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-28 05:25:32,544 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 13 [2024-11-28 05:25:32,544 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1068820897] [2024-11-28 05:25:32,544 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-28 05:25:32,544 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2024-11-28 05:25:32,544 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 05:25:32,545 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2024-11-28 05:25:32,545 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=126, Unknown=0, NotChecked=0, Total=182 [2024-11-28 05:25:32,610 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 35 [2024-11-28 05:25:32,611 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 50 places, 41 transitions, 182 flow. Second operand has 14 states, 14 states have (on average 14.928571428571429) internal successors, (209), 14 states have internal predecessors, (209), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 05:25:32,611 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-28 05:25:32,611 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 35 [2024-11-28 05:25:32,611 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-28 05:25:32,984 INFO L124 PetriNetUnfolderBase]: 315/614 cut-off events. [2024-11-28 05:25:32,984 INFO L125 PetriNetUnfolderBase]: For 965/1027 co-relation queries the response was YES. [2024-11-28 05:25:32,987 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1979 conditions, 614 events. 315/614 cut-off events. For 965/1027 co-relation queries the response was YES. Maximal size of possible extension queue 39. Compared 2772 event pairs, 149 based on Foata normal form. 12/618 useless extension candidates. Maximal degree in co-relation 1029. Up to 278 conditions per place. [2024-11-28 05:25:32,992 INFO L140 encePairwiseOnDemand]: 27/35 looper letters, 61 selfloop transitions, 13 changer transitions 0/80 dead transitions. [2024-11-28 05:25:32,992 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 57 places, 80 transitions, 522 flow [2024-11-28 05:25:32,993 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-11-28 05:25:32,993 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-11-28 05:25:32,993 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 162 transitions. [2024-11-28 05:25:32,994 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.5785714285714286 [2024-11-28 05:25:32,994 INFO L175 Difference]: Start difference. First operand has 50 places, 41 transitions, 182 flow. Second operand 8 states and 162 transitions. [2024-11-28 05:25:32,994 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 57 places, 80 transitions, 522 flow [2024-11-28 05:25:32,997 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 53 places, 80 transitions, 501 flow, removed 4 selfloop flow, removed 4 redundant places. [2024-11-28 05:25:33,001 INFO L231 Difference]: Finished difference. Result has 56 places, 45 transitions, 245 flow [2024-11-28 05:25:33,005 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=35, PETRI_DIFFERENCE_MINUEND_FLOW=169, PETRI_DIFFERENCE_MINUEND_PLACES=46, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=41, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=9, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=28, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=245, PETRI_PLACES=56, PETRI_TRANSITIONS=45} [2024-11-28 05:25:33,005 INFO L279 CegarLoopForPetriNet]: 36 programPoint places, 20 predicate places. [2024-11-28 05:25:33,006 INFO L471 AbstractCegarLoop]: Abstraction has has 56 places, 45 transitions, 245 flow [2024-11-28 05:25:33,006 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 14.928571428571429) internal successors, (209), 14 states have internal predecessors, (209), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 05:25:33,006 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-28 05:25:33,006 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 05:25:33,016 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_30f617b7-f0b1-412a-b7a3-a0ccf9358712/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2024-11-28 05:25:33,206 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_30f617b7-f0b1-412a-b7a3-a0ccf9358712/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 05:25:33,207 INFO L396 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 11 more)] === [2024-11-28 05:25:33,207 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 05:25:33,207 INFO L85 PathProgramCache]: Analyzing trace with hash -1492005273, now seen corresponding path program 1 times [2024-11-28 05:25:33,207 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 05:25:33,207 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [597127907] [2024-11-28 05:25:33,207 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-28 05:25:33,207 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 05:25:33,220 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 05:25:33,252 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-28 05:25:33,253 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 05:25:33,253 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [597127907] [2024-11-28 05:25:33,253 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [597127907] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-28 05:25:33,253 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-28 05:25:33,253 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-11-28 05:25:33,253 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [731199269] [2024-11-28 05:25:33,253 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-28 05:25:33,254 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-28 05:25:33,254 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 05:25:33,254 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-28 05:25:33,254 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-28 05:25:33,257 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 35 [2024-11-28 05:25:33,257 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 56 places, 45 transitions, 245 flow. Second operand has 3 states, 3 states have (on average 16.333333333333332) internal successors, (49), 3 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 05:25:33,257 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-28 05:25:33,258 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 35 [2024-11-28 05:25:33,258 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-28 05:25:33,461 INFO L124 PetriNetUnfolderBase]: 409/812 cut-off events. [2024-11-28 05:25:33,461 INFO L125 PetriNetUnfolderBase]: For 1609/1668 co-relation queries the response was YES. [2024-11-28 05:25:33,465 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2729 conditions, 812 events. 409/812 cut-off events. For 1609/1668 co-relation queries the response was YES. Maximal size of possible extension queue 49. Compared 3964 event pairs, 122 based on Foata normal form. 3/812 useless extension candidates. Maximal degree in co-relation 1384. Up to 479 conditions per place. [2024-11-28 05:25:33,471 INFO L140 encePairwiseOnDemand]: 31/35 looper letters, 46 selfloop transitions, 3 changer transitions 6/60 dead transitions. [2024-11-28 05:25:33,471 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 58 places, 60 transitions, 434 flow [2024-11-28 05:25:33,472 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-28 05:25:33,472 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-11-28 05:25:33,472 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 71 transitions. [2024-11-28 05:25:33,472 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.6761904761904762 [2024-11-28 05:25:33,472 INFO L175 Difference]: Start difference. First operand has 56 places, 45 transitions, 245 flow. Second operand 3 states and 71 transitions. [2024-11-28 05:25:33,472 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 58 places, 60 transitions, 434 flow [2024-11-28 05:25:33,478 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 54 places, 60 transitions, 418 flow, removed 2 selfloop flow, removed 4 redundant places. [2024-11-28 05:25:33,480 INFO L231 Difference]: Finished difference. Result has 55 places, 42 transitions, 213 flow [2024-11-28 05:25:33,481 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=35, PETRI_DIFFERENCE_MINUEND_FLOW=229, PETRI_DIFFERENCE_MINUEND_PLACES=52, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=45, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=42, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=213, PETRI_PLACES=55, PETRI_TRANSITIONS=42} [2024-11-28 05:25:33,481 INFO L279 CegarLoopForPetriNet]: 36 programPoint places, 19 predicate places. [2024-11-28 05:25:33,482 INFO L471 AbstractCegarLoop]: Abstraction has has 55 places, 42 transitions, 213 flow [2024-11-28 05:25:33,482 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 16.333333333333332) internal successors, (49), 3 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 05:25:33,482 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-28 05:25:33,482 INFO L206 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 05:25:33,483 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2024-11-28 05:25:33,483 INFO L396 AbstractCegarLoop]: === Iteration 11 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 11 more)] === [2024-11-28 05:25:33,483 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 05:25:33,483 INFO L85 PathProgramCache]: Analyzing trace with hash 1358576480, now seen corresponding path program 1 times [2024-11-28 05:25:33,483 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 05:25:33,484 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1304605712] [2024-11-28 05:25:33,484 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-28 05:25:33,484 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 05:25:33,499 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 05:25:33,635 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 4 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-28 05:25:33,636 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 05:25:33,636 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1304605712] [2024-11-28 05:25:33,636 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1304605712] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-28 05:25:33,636 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1098073252] [2024-11-28 05:25:33,636 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-28 05:25:33,636 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 05:25:33,636 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_30f617b7-f0b1-412a-b7a3-a0ccf9358712/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 05:25:33,638 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_30f617b7-f0b1-412a-b7a3-a0ccf9358712/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 05:25:33,642 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_30f617b7-f0b1-412a-b7a3-a0ccf9358712/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2024-11-28 05:25:33,714 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 05:25:33,716 INFO L256 TraceCheckSpWp]: Trace formula consists of 123 conjuncts, 8 conjuncts are in the unsatisfiable core [2024-11-28 05:25:33,717 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 05:25:33,822 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 5 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-28 05:25:33,822 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-28 05:25:33,914 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 5 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-28 05:25:33,915 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1098073252] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-28 05:25:33,915 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-28 05:25:33,915 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 13 [2024-11-28 05:25:33,915 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1241549369] [2024-11-28 05:25:33,915 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-28 05:25:33,915 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2024-11-28 05:25:33,916 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 05:25:33,916 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2024-11-28 05:25:33,916 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=127, Unknown=0, NotChecked=0, Total=182 [2024-11-28 05:25:33,991 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 35 [2024-11-28 05:25:33,992 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 55 places, 42 transitions, 213 flow. Second operand has 14 states, 14 states have (on average 15.071428571428571) internal successors, (211), 14 states have internal predecessors, (211), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 05:25:33,992 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-28 05:25:33,992 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 35 [2024-11-28 05:25:33,992 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-28 05:25:34,277 INFO L124 PetriNetUnfolderBase]: 340/656 cut-off events. [2024-11-28 05:25:34,277 INFO L125 PetriNetUnfolderBase]: For 1527/1599 co-relation queries the response was YES. [2024-11-28 05:25:34,279 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2318 conditions, 656 events. 340/656 cut-off events. For 1527/1599 co-relation queries the response was YES. Maximal size of possible extension queue 42. Compared 3130 event pairs, 197 based on Foata normal form. 13/660 useless extension candidates. Maximal degree in co-relation 1357. Up to 348 conditions per place. [2024-11-28 05:25:34,283 INFO L140 encePairwiseOnDemand]: 27/35 looper letters, 52 selfloop transitions, 10 changer transitions 0/70 dead transitions. [2024-11-28 05:25:34,283 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 58 places, 70 transitions, 489 flow [2024-11-28 05:25:34,284 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-11-28 05:25:34,284 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-11-28 05:25:34,285 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 159 transitions. [2024-11-28 05:25:34,285 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.5678571428571428 [2024-11-28 05:25:34,285 INFO L175 Difference]: Start difference. First operand has 55 places, 42 transitions, 213 flow. Second operand 8 states and 159 transitions. [2024-11-28 05:25:34,285 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 58 places, 70 transitions, 489 flow [2024-11-28 05:25:34,289 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 55 places, 70 transitions, 462 flow, removed 12 selfloop flow, removed 3 redundant places. [2024-11-28 05:25:34,290 INFO L231 Difference]: Finished difference. Result has 58 places, 46 transitions, 257 flow [2024-11-28 05:25:34,290 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=35, PETRI_DIFFERENCE_MINUEND_FLOW=196, PETRI_DIFFERENCE_MINUEND_PLACES=48, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=42, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=32, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=257, PETRI_PLACES=58, PETRI_TRANSITIONS=46} [2024-11-28 05:25:34,291 INFO L279 CegarLoopForPetriNet]: 36 programPoint places, 22 predicate places. [2024-11-28 05:25:34,291 INFO L471 AbstractCegarLoop]: Abstraction has has 58 places, 46 transitions, 257 flow [2024-11-28 05:25:34,291 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 15.071428571428571) internal successors, (211), 14 states have internal predecessors, (211), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 05:25:34,291 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-28 05:25:34,292 INFO L206 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 05:25:34,301 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_30f617b7-f0b1-412a-b7a3-a0ccf9358712/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2024-11-28 05:25:34,492 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_30f617b7-f0b1-412a-b7a3-a0ccf9358712/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 05:25:34,492 INFO L396 AbstractCegarLoop]: === Iteration 12 === Targeting thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 11 more)] === [2024-11-28 05:25:34,493 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 05:25:34,493 INFO L85 PathProgramCache]: Analyzing trace with hash 749709422, now seen corresponding path program 2 times [2024-11-28 05:25:34,493 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 05:25:34,493 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [461665374] [2024-11-28 05:25:34,493 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-28 05:25:34,493 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 05:25:34,510 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-28 05:25:34,510 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 05:25:34,837 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 6 proven. 5 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-11-28 05:25:34,837 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 05:25:34,837 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [461665374] [2024-11-28 05:25:34,838 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [461665374] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-28 05:25:34,838 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1921670508] [2024-11-28 05:25:34,838 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-28 05:25:34,838 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 05:25:34,838 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_30f617b7-f0b1-412a-b7a3-a0ccf9358712/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 05:25:34,840 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_30f617b7-f0b1-412a-b7a3-a0ccf9358712/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 05:25:34,844 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_30f617b7-f0b1-412a-b7a3-a0ccf9358712/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2024-11-28 05:25:34,920 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-28 05:25:34,921 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 05:25:34,922 INFO L256 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 17 conjuncts are in the unsatisfiable core [2024-11-28 05:25:34,924 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 05:25:35,114 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 9 proven. 6 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-28 05:25:35,114 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-28 05:25:35,277 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 24 treesize of output 20 [2024-11-28 05:25:35,348 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 9 proven. 6 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-28 05:25:35,348 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1921670508] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-28 05:25:35,348 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-28 05:25:35,348 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 18 [2024-11-28 05:25:35,348 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [427972764] [2024-11-28 05:25:35,348 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-28 05:25:35,349 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2024-11-28 05:25:35,349 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 05:25:35,349 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2024-11-28 05:25:35,350 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=323, Unknown=0, NotChecked=0, Total=380 [2024-11-28 05:25:35,988 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 35 [2024-11-28 05:25:35,989 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 58 places, 46 transitions, 257 flow. Second operand has 20 states, 20 states have (on average 13.9) internal successors, (278), 20 states have internal predecessors, (278), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 05:25:35,989 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-28 05:25:35,989 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 35 [2024-11-28 05:25:35,990 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-28 05:25:36,984 INFO L124 PetriNetUnfolderBase]: 408/774 cut-off events. [2024-11-28 05:25:36,985 INFO L125 PetriNetUnfolderBase]: For 1703/1744 co-relation queries the response was YES. [2024-11-28 05:25:36,987 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2747 conditions, 774 events. 408/774 cut-off events. For 1703/1744 co-relation queries the response was YES. Maximal size of possible extension queue 42. Compared 3685 event pairs, 75 based on Foata normal form. 24/790 useless extension candidates. Maximal degree in co-relation 1721. Up to 136 conditions per place. [2024-11-28 05:25:36,991 INFO L140 encePairwiseOnDemand]: 27/35 looper letters, 95 selfloop transitions, 18 changer transitions 0/120 dead transitions. [2024-11-28 05:25:36,991 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 70 places, 120 transitions, 870 flow [2024-11-28 05:25:36,991 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2024-11-28 05:25:36,991 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2024-11-28 05:25:36,992 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 269 transitions. [2024-11-28 05:25:36,993 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.5489795918367347 [2024-11-28 05:25:36,993 INFO L175 Difference]: Start difference. First operand has 58 places, 46 transitions, 257 flow. Second operand 14 states and 269 transitions. [2024-11-28 05:25:36,993 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 70 places, 120 transitions, 870 flow [2024-11-28 05:25:36,997 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 66 places, 120 transitions, 851 flow, removed 4 selfloop flow, removed 4 redundant places. [2024-11-28 05:25:36,999 INFO L231 Difference]: Finished difference. Result has 68 places, 49 transitions, 306 flow [2024-11-28 05:25:36,999 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=35, PETRI_DIFFERENCE_MINUEND_FLOW=240, PETRI_DIFFERENCE_MINUEND_PLACES=53, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=45, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=14, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=30, PETRI_DIFFERENCE_SUBTRAHEND_STATES=14, PETRI_FLOW=306, PETRI_PLACES=68, PETRI_TRANSITIONS=49} [2024-11-28 05:25:37,000 INFO L279 CegarLoopForPetriNet]: 36 programPoint places, 32 predicate places. [2024-11-28 05:25:37,000 INFO L471 AbstractCegarLoop]: Abstraction has has 68 places, 49 transitions, 306 flow [2024-11-28 05:25:37,000 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 13.9) internal successors, (278), 20 states have internal predecessors, (278), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 05:25:37,000 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-28 05:25:37,001 INFO L206 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 05:25:37,013 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_30f617b7-f0b1-412a-b7a3-a0ccf9358712/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2024-11-28 05:25:37,205 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_30f617b7-f0b1-412a-b7a3-a0ccf9358712/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 05:25:37,206 INFO L396 AbstractCegarLoop]: === Iteration 13 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 11 more)] === [2024-11-28 05:25:37,206 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 05:25:37,206 INFO L85 PathProgramCache]: Analyzing trace with hash -1103934889, now seen corresponding path program 2 times [2024-11-28 05:25:37,206 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 05:25:37,207 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1899081427] [2024-11-28 05:25:37,207 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-28 05:25:37,207 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 05:25:37,225 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-28 05:25:37,225 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 05:25:37,476 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 6 proven. 5 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-11-28 05:25:37,476 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 05:25:37,476 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1899081427] [2024-11-28 05:25:37,476 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1899081427] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-28 05:25:37,476 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [918929887] [2024-11-28 05:25:37,476 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-28 05:25:37,477 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 05:25:37,477 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_30f617b7-f0b1-412a-b7a3-a0ccf9358712/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 05:25:37,481 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_30f617b7-f0b1-412a-b7a3-a0ccf9358712/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 05:25:37,487 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_30f617b7-f0b1-412a-b7a3-a0ccf9358712/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2024-11-28 05:25:37,558 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-28 05:25:37,558 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 05:25:37,559 INFO L256 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 17 conjuncts are in the unsatisfiable core [2024-11-28 05:25:37,561 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 05:25:37,748 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 9 proven. 6 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-28 05:25:37,748 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-28 05:25:37,898 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 24 treesize of output 20 [2024-11-28 05:25:37,964 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 9 proven. 6 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-28 05:25:37,965 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [918929887] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-28 05:25:37,965 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-28 05:25:37,965 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 18 [2024-11-28 05:25:37,965 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [271028880] [2024-11-28 05:25:37,965 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-28 05:25:37,965 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2024-11-28 05:25:37,966 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 05:25:37,966 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2024-11-28 05:25:37,966 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=326, Unknown=0, NotChecked=0, Total=380 [2024-11-28 05:25:38,550 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 35 [2024-11-28 05:25:38,552 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 68 places, 49 transitions, 306 flow. Second operand has 20 states, 20 states have (on average 14.2) internal successors, (284), 20 states have internal predecessors, (284), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 05:25:38,552 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-28 05:25:38,552 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 35 [2024-11-28 05:25:38,552 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-28 05:25:39,686 INFO L124 PetriNetUnfolderBase]: 557/1014 cut-off events. [2024-11-28 05:25:39,686 INFO L125 PetriNetUnfolderBase]: For 3378/3420 co-relation queries the response was YES. [2024-11-28 05:25:39,689 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3866 conditions, 1014 events. 557/1014 cut-off events. For 3378/3420 co-relation queries the response was YES. Maximal size of possible extension queue 40. Compared 4739 event pairs, 112 based on Foata normal form. 38/1033 useless extension candidates. Maximal degree in co-relation 2775. Up to 175 conditions per place. [2024-11-28 05:25:39,696 INFO L140 encePairwiseOnDemand]: 27/35 looper letters, 103 selfloop transitions, 18 changer transitions 0/129 dead transitions. [2024-11-28 05:25:39,696 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 80 places, 129 transitions, 1085 flow [2024-11-28 05:25:39,697 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2024-11-28 05:25:39,697 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2024-11-28 05:25:39,698 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 262 transitions. [2024-11-28 05:25:39,699 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.5346938775510204 [2024-11-28 05:25:39,699 INFO L175 Difference]: Start difference. First operand has 68 places, 49 transitions, 306 flow. Second operand 14 states and 262 transitions. [2024-11-28 05:25:39,699 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 80 places, 129 transitions, 1085 flow [2024-11-28 05:25:39,706 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 69 places, 129 transitions, 901 flow, removed 32 selfloop flow, removed 11 redundant places. [2024-11-28 05:25:39,710 INFO L231 Difference]: Finished difference. Result has 71 places, 53 transitions, 327 flow [2024-11-28 05:25:39,710 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=35, PETRI_DIFFERENCE_MINUEND_FLOW=250, PETRI_DIFFERENCE_MINUEND_PLACES=56, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=48, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=13, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=34, PETRI_DIFFERENCE_SUBTRAHEND_STATES=14, PETRI_FLOW=327, PETRI_PLACES=71, PETRI_TRANSITIONS=53} [2024-11-28 05:25:39,711 INFO L279 CegarLoopForPetriNet]: 36 programPoint places, 35 predicate places. [2024-11-28 05:25:39,712 INFO L471 AbstractCegarLoop]: Abstraction has has 71 places, 53 transitions, 327 flow [2024-11-28 05:25:39,712 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 14.2) internal successors, (284), 20 states have internal predecessors, (284), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 05:25:39,712 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-28 05:25:39,712 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 05:25:39,723 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_30f617b7-f0b1-412a-b7a3-a0ccf9358712/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2024-11-28 05:25:39,913 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_30f617b7-f0b1-412a-b7a3-a0ccf9358712/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2024-11-28 05:25:39,913 INFO L396 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 11 more)] === [2024-11-28 05:25:39,913 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 05:25:39,913 INFO L85 PathProgramCache]: Analyzing trace with hash 846822547, now seen corresponding path program 1 times [2024-11-28 05:25:39,914 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 05:25:39,914 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1222241797] [2024-11-28 05:25:39,914 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-28 05:25:39,914 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 05:25:39,937 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 05:25:40,033 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-28 05:25:40,033 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 05:25:40,033 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1222241797] [2024-11-28 05:25:40,033 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1222241797] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-28 05:25:40,033 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [516900466] [2024-11-28 05:25:40,034 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-28 05:25:40,035 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 05:25:40,035 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_30f617b7-f0b1-412a-b7a3-a0ccf9358712/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 05:25:40,037 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_30f617b7-f0b1-412a-b7a3-a0ccf9358712/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 05:25:40,042 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_30f617b7-f0b1-412a-b7a3-a0ccf9358712/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2024-11-28 05:25:40,111 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 05:25:40,113 INFO L256 TraceCheckSpWp]: Trace formula consists of 150 conjuncts, 6 conjuncts are in the unsatisfiable core [2024-11-28 05:25:40,114 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 05:25:40,158 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-28 05:25:40,158 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-28 05:25:40,206 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-28 05:25:40,207 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [516900466] provided 1 perfect and 1 imperfect interpolant sequences [2024-11-28 05:25:40,207 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2024-11-28 05:25:40,207 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [5, 4] total 9 [2024-11-28 05:25:40,207 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1711367727] [2024-11-28 05:25:40,207 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-28 05:25:40,207 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-11-28 05:25:40,208 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 05:25:40,208 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-11-28 05:25:40,208 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2024-11-28 05:25:40,225 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 35 [2024-11-28 05:25:40,225 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 71 places, 53 transitions, 327 flow. Second operand has 5 states, 5 states have (on average 16.4) internal successors, (82), 5 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 05:25:40,225 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-28 05:25:40,225 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 35 [2024-11-28 05:25:40,225 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-28 05:25:40,398 INFO L124 PetriNetUnfolderBase]: 519/958 cut-off events. [2024-11-28 05:25:40,398 INFO L125 PetriNetUnfolderBase]: For 3594/3618 co-relation queries the response was YES. [2024-11-28 05:25:40,401 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3695 conditions, 958 events. 519/958 cut-off events. For 3594/3618 co-relation queries the response was YES. Maximal size of possible extension queue 37. Compared 4506 event pairs, 128 based on Foata normal form. 34/945 useless extension candidates. Maximal degree in co-relation 2816. Up to 476 conditions per place. [2024-11-28 05:25:40,406 INFO L140 encePairwiseOnDemand]: 29/35 looper letters, 50 selfloop transitions, 10 changer transitions 0/68 dead transitions. [2024-11-28 05:25:40,406 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 75 places, 68 transitions, 574 flow [2024-11-28 05:25:40,406 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-11-28 05:25:40,407 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-11-28 05:25:40,407 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 95 transitions. [2024-11-28 05:25:40,407 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.5428571428571428 [2024-11-28 05:25:40,407 INFO L175 Difference]: Start difference. First operand has 71 places, 53 transitions, 327 flow. Second operand 5 states and 95 transitions. [2024-11-28 05:25:40,408 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 75 places, 68 transitions, 574 flow [2024-11-28 05:25:40,413 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 65 places, 68 transitions, 484 flow, removed 17 selfloop flow, removed 10 redundant places. [2024-11-28 05:25:40,414 INFO L231 Difference]: Finished difference. Result has 66 places, 52 transitions, 300 flow [2024-11-28 05:25:40,414 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=35, PETRI_DIFFERENCE_MINUEND_FLOW=261, PETRI_DIFFERENCE_MINUEND_PLACES=61, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=51, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=9, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=41, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=300, PETRI_PLACES=66, PETRI_TRANSITIONS=52} [2024-11-28 05:25:40,415 INFO L279 CegarLoopForPetriNet]: 36 programPoint places, 30 predicate places. [2024-11-28 05:25:40,415 INFO L471 AbstractCegarLoop]: Abstraction has has 66 places, 52 transitions, 300 flow [2024-11-28 05:25:40,415 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 16.4) internal successors, (82), 5 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 05:25:40,415 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-28 05:25:40,415 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 05:25:40,426 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_30f617b7-f0b1-412a-b7a3-a0ccf9358712/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2024-11-28 05:25:40,616 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_30f617b7-f0b1-412a-b7a3-a0ccf9358712/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2024-11-28 05:25:40,616 INFO L396 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 11 more)] === [2024-11-28 05:25:40,617 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 05:25:40,617 INFO L85 PathProgramCache]: Analyzing trace with hash 773181213, now seen corresponding path program 1 times [2024-11-28 05:25:40,617 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 05:25:40,617 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1940310640] [2024-11-28 05:25:40,617 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-28 05:25:40,617 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 05:25:40,629 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 05:25:40,736 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-28 05:25:40,736 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 05:25:40,736 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1940310640] [2024-11-28 05:25:40,736 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1940310640] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-28 05:25:40,736 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [83257788] [2024-11-28 05:25:40,737 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-28 05:25:40,737 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 05:25:40,737 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_30f617b7-f0b1-412a-b7a3-a0ccf9358712/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 05:25:40,739 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_30f617b7-f0b1-412a-b7a3-a0ccf9358712/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 05:25:40,742 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_30f617b7-f0b1-412a-b7a3-a0ccf9358712/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2024-11-28 05:25:40,823 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 05:25:40,824 INFO L256 TraceCheckSpWp]: Trace formula consists of 150 conjuncts, 6 conjuncts are in the unsatisfiable core [2024-11-28 05:25:40,825 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 05:25:40,873 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-28 05:25:40,875 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-28 05:25:40,928 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-28 05:25:40,928 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [83257788] provided 1 perfect and 1 imperfect interpolant sequences [2024-11-28 05:25:40,928 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2024-11-28 05:25:40,928 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [6, 4] total 10 [2024-11-28 05:25:40,928 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1179836605] [2024-11-28 05:25:40,929 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-28 05:25:40,929 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-11-28 05:25:40,930 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 05:25:40,930 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-11-28 05:25:40,930 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=73, Unknown=0, NotChecked=0, Total=110 [2024-11-28 05:25:40,942 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 35 [2024-11-28 05:25:40,942 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 66 places, 52 transitions, 300 flow. Second operand has 5 states, 5 states have (on average 16.4) internal successors, (82), 5 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 05:25:40,942 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-28 05:25:40,942 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 35 [2024-11-28 05:25:40,942 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-28 05:25:41,104 INFO L124 PetriNetUnfolderBase]: 461/894 cut-off events. [2024-11-28 05:25:41,104 INFO L125 PetriNetUnfolderBase]: For 2975/2993 co-relation queries the response was YES. [2024-11-28 05:25:41,107 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3213 conditions, 894 events. 461/894 cut-off events. For 2975/2993 co-relation queries the response was YES. Maximal size of possible extension queue 34. Compared 4222 event pairs, 147 based on Foata normal form. 28/889 useless extension candidates. Maximal degree in co-relation 2529. Up to 407 conditions per place. [2024-11-28 05:25:41,111 INFO L140 encePairwiseOnDemand]: 29/35 looper letters, 45 selfloop transitions, 10 changer transitions 0/64 dead transitions. [2024-11-28 05:25:41,111 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 70 places, 64 transitions, 493 flow [2024-11-28 05:25:41,112 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-11-28 05:25:41,112 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-11-28 05:25:41,112 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 94 transitions. [2024-11-28 05:25:41,112 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.5371428571428571 [2024-11-28 05:25:41,112 INFO L175 Difference]: Start difference. First operand has 66 places, 52 transitions, 300 flow. Second operand 5 states and 94 transitions. [2024-11-28 05:25:41,113 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 70 places, 64 transitions, 493 flow [2024-11-28 05:25:41,116 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 67 places, 64 transitions, 470 flow, removed 3 selfloop flow, removed 3 redundant places. [2024-11-28 05:25:41,118 INFO L231 Difference]: Finished difference. Result has 68 places, 51 transitions, 307 flow [2024-11-28 05:25:41,118 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=35, PETRI_DIFFERENCE_MINUEND_FLOW=268, PETRI_DIFFERENCE_MINUEND_PLACES=63, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=50, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=9, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=40, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=307, PETRI_PLACES=68, PETRI_TRANSITIONS=51} [2024-11-28 05:25:41,118 INFO L279 CegarLoopForPetriNet]: 36 programPoint places, 32 predicate places. [2024-11-28 05:25:41,119 INFO L471 AbstractCegarLoop]: Abstraction has has 68 places, 51 transitions, 307 flow [2024-11-28 05:25:41,119 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 16.4) internal successors, (82), 5 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 05:25:41,119 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-28 05:25:41,119 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 05:25:41,128 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_30f617b7-f0b1-412a-b7a3-a0ccf9358712/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Ended with exit code 0 [2024-11-28 05:25:41,319 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_30f617b7-f0b1-412a-b7a3-a0ccf9358712/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2024-11-28 05:25:41,320 INFO L396 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 11 more)] === [2024-11-28 05:25:41,320 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 05:25:41,321 INFO L85 PathProgramCache]: Analyzing trace with hash -1499416600, now seen corresponding path program 1 times [2024-11-28 05:25:41,321 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 05:25:41,321 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2102273612] [2024-11-28 05:25:41,321 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-28 05:25:41,322 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 05:25:41,349 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 05:25:41,744 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-11-28 05:25:41,745 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 05:25:41,745 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2102273612] [2024-11-28 05:25:41,745 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2102273612] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-28 05:25:41,745 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [221084758] [2024-11-28 05:25:41,745 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-28 05:25:41,745 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 05:25:41,745 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_30f617b7-f0b1-412a-b7a3-a0ccf9358712/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 05:25:41,747 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_30f617b7-f0b1-412a-b7a3-a0ccf9358712/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 05:25:41,750 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_30f617b7-f0b1-412a-b7a3-a0ccf9358712/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2024-11-28 05:25:41,828 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 05:25:41,829 INFO L256 TraceCheckSpWp]: Trace formula consists of 167 conjuncts, 19 conjuncts are in the unsatisfiable core [2024-11-28 05:25:41,831 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 05:25:41,942 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-11-28 05:25:41,942 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-28 05:25:41,999 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-28 05:25:42,000 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 17 treesize of output 14 [2024-11-28 05:25:42,021 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-11-28 05:25:42,021 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [221084758] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-28 05:25:42,021 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-28 05:25:42,021 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 7, 7] total 17 [2024-11-28 05:25:42,021 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1678852460] [2024-11-28 05:25:42,021 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-28 05:25:42,022 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2024-11-28 05:25:42,022 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 05:25:42,022 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2024-11-28 05:25:42,023 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=255, Unknown=0, NotChecked=0, Total=306 [2024-11-28 05:25:42,269 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 35 [2024-11-28 05:25:42,269 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 68 places, 51 transitions, 307 flow. Second operand has 18 states, 18 states have (on average 14.11111111111111) internal successors, (254), 18 states have internal predecessors, (254), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 05:25:42,269 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-28 05:25:42,270 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 35 [2024-11-28 05:25:42,270 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-28 05:25:43,139 INFO L124 PetriNetUnfolderBase]: 933/1747 cut-off events. [2024-11-28 05:25:43,139 INFO L125 PetriNetUnfolderBase]: For 4997/5033 co-relation queries the response was YES. [2024-11-28 05:25:43,145 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6563 conditions, 1747 events. 933/1747 cut-off events. For 4997/5033 co-relation queries the response was YES. Maximal size of possible extension queue 74. Compared 9317 event pairs, 121 based on Foata normal form. 3/1748 useless extension candidates. Maximal degree in co-relation 5327. Up to 799 conditions per place. [2024-11-28 05:25:43,153 INFO L140 encePairwiseOnDemand]: 24/35 looper letters, 133 selfloop transitions, 55 changer transitions 14/211 dead transitions. [2024-11-28 05:25:43,153 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 88 places, 211 transitions, 1636 flow [2024-11-28 05:25:43,154 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2024-11-28 05:25:43,154 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2024-11-28 05:25:43,155 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 398 transitions. [2024-11-28 05:25:43,156 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.5414965986394558 [2024-11-28 05:25:43,156 INFO L175 Difference]: Start difference. First operand has 68 places, 51 transitions, 307 flow. Second operand 21 states and 398 transitions. [2024-11-28 05:25:43,156 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 88 places, 211 transitions, 1636 flow [2024-11-28 05:25:43,167 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 85 places, 211 transitions, 1592 flow, removed 3 selfloop flow, removed 3 redundant places. [2024-11-28 05:25:43,169 INFO L231 Difference]: Finished difference. Result has 93 places, 102 transitions, 798 flow [2024-11-28 05:25:43,170 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=35, PETRI_DIFFERENCE_MINUEND_FLOW=290, PETRI_DIFFERENCE_MINUEND_PLACES=65, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=51, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=14, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=35, PETRI_DIFFERENCE_SUBTRAHEND_STATES=21, PETRI_FLOW=798, PETRI_PLACES=93, PETRI_TRANSITIONS=102} [2024-11-28 05:25:43,170 INFO L279 CegarLoopForPetriNet]: 36 programPoint places, 57 predicate places. [2024-11-28 05:25:43,170 INFO L471 AbstractCegarLoop]: Abstraction has has 93 places, 102 transitions, 798 flow [2024-11-28 05:25:43,171 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 14.11111111111111) internal successors, (254), 18 states have internal predecessors, (254), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 05:25:43,171 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-28 05:25:43,171 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 05:25:43,181 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_30f617b7-f0b1-412a-b7a3-a0ccf9358712/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Ended with exit code 0 [2024-11-28 05:25:43,375 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_30f617b7-f0b1-412a-b7a3-a0ccf9358712/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2024-11-28 05:25:43,375 INFO L396 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 11 more)] === [2024-11-28 05:25:43,376 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 05:25:43,376 INFO L85 PathProgramCache]: Analyzing trace with hash -965669172, now seen corresponding path program 2 times [2024-11-28 05:25:43,376 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 05:25:43,376 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [185531349] [2024-11-28 05:25:43,376 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-28 05:25:43,376 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 05:25:43,402 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-28 05:25:43,402 INFO L230 tOrderPrioritization]: Conjunction of SSA is sat [2024-11-28 05:25:43,402 INFO L357 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2024-11-28 05:25:43,426 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2024-11-28 05:25:43,471 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2024-11-28 05:25:43,471 INFO L340 BasicCegarLoop]: Counterexample is feasible [2024-11-28 05:25:43,472 INFO L782 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_LEAK (13 of 14 remaining) [2024-11-28 05:25:43,474 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (12 of 14 remaining) [2024-11-28 05:25:43,478 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (11 of 14 remaining) [2024-11-28 05:25:43,478 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (10 of 14 remaining) [2024-11-28 05:25:43,478 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (9 of 14 remaining) [2024-11-28 05:25:43,478 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (8 of 14 remaining) [2024-11-28 05:25:43,478 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (7 of 14 remaining) [2024-11-28 05:25:43,478 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr3ASSERT_VIOLATIONMEMORY_LEAK (6 of 14 remaining) [2024-11-28 05:25:43,478 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (5 of 14 remaining) [2024-11-28 05:25:43,478 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (4 of 14 remaining) [2024-11-28 05:25:43,478 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (3 of 14 remaining) [2024-11-28 05:25:43,479 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (2 of 14 remaining) [2024-11-28 05:25:43,479 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (1 of 14 remaining) [2024-11-28 05:25:43,479 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (0 of 14 remaining) [2024-11-28 05:25:43,479 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2024-11-28 05:25:43,479 INFO L422 BasicCegarLoop]: Path program histogram: [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 05:25:43,527 INFO L241 ceAbstractionStarter]: Analysis of concurrent program completed with 1 thread instances [2024-11-28 05:25:43,527 INFO L170 ceAbstractionStarter]: Computing trace abstraction results [2024-11-28 05:25:43,534 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 28.11 05:25:43 BasicIcfg [2024-11-28 05:25:43,534 INFO L131 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2024-11-28 05:25:43,535 INFO L112 PluginConnector]: ------------------------Witness Printer---------------------------- [2024-11-28 05:25:43,535 INFO L270 PluginConnector]: Initializing Witness Printer... [2024-11-28 05:25:43,535 INFO L274 PluginConnector]: Witness Printer initialized [2024-11-28 05:25:43,536 INFO L184 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.11 05:25:25" (3/4) ... [2024-11-28 05:25:43,538 INFO L149 WitnessPrinter]: No result that supports witness generation found [2024-11-28 05:25:43,539 INFO L131 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2024-11-28 05:25:43,540 INFO L158 Benchmark]: Toolchain (without parser) took 19306.47ms. Allocated memory was 117.4MB in the beginning and 226.5MB in the end (delta: 109.1MB). Free memory was 92.3MB in the beginning and 111.0MB in the end (delta: -18.7MB). Peak memory consumption was 85.8MB. Max. memory is 16.1GB. [2024-11-28 05:25:43,541 INFO L158 Benchmark]: CDTParser took 1.35ms. Allocated memory is still 117.4MB. Free memory is still 72.4MB. There was no memory consumed. Max. memory is 16.1GB. [2024-11-28 05:25:43,541 INFO L158 Benchmark]: CACSL2BoogieTranslator took 329.82ms. Allocated memory is still 117.4MB. Free memory was 92.1MB in the beginning and 80.3MB in the end (delta: 11.9MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. [2024-11-28 05:25:43,541 INFO L158 Benchmark]: Boogie Procedure Inliner took 66.71ms. Allocated memory is still 117.4MB. Free memory was 80.3MB in the beginning and 78.7MB in the end (delta: 1.6MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. [2024-11-28 05:25:43,542 INFO L158 Benchmark]: Boogie Preprocessor took 71.62ms. Allocated memory is still 117.4MB. Free memory was 78.7MB in the beginning and 76.7MB in the end (delta: 2.0MB). There was no memory consumed. Max. memory is 16.1GB. [2024-11-28 05:25:43,543 INFO L158 Benchmark]: RCFGBuilder took 979.58ms. Allocated memory is still 117.4MB. Free memory was 76.7MB in the beginning and 79.1MB in the end (delta: -2.4MB). Peak memory consumption was 37.7MB. Max. memory is 16.1GB. [2024-11-28 05:25:43,543 INFO L158 Benchmark]: TraceAbstraction took 17847.41ms. Allocated memory was 117.4MB in the beginning and 226.5MB in the end (delta: 109.1MB). Free memory was 78.6MB in the beginning and 111.5MB in the end (delta: -32.9MB). Peak memory consumption was 73.3MB. Max. memory is 16.1GB. [2024-11-28 05:25:43,543 INFO L158 Benchmark]: Witness Printer took 4.08ms. Allocated memory is still 226.5MB. Free memory was 111.5MB in the beginning and 111.0MB in the end (delta: 571.6kB). There was no memory consumed. Max. memory is 16.1GB. [2024-11-28 05:25:43,545 INFO L338 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 1.35ms. Allocated memory is still 117.4MB. Free memory is still 72.4MB. There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 329.82ms. Allocated memory is still 117.4MB. Free memory was 92.1MB in the beginning and 80.3MB in the end (delta: 11.9MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 66.71ms. Allocated memory is still 117.4MB. Free memory was 80.3MB in the beginning and 78.7MB in the end (delta: 1.6MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. * Boogie Preprocessor took 71.62ms. Allocated memory is still 117.4MB. Free memory was 78.7MB in the beginning and 76.7MB in the end (delta: 2.0MB). There was no memory consumed. Max. memory is 16.1GB. * RCFGBuilder took 979.58ms. Allocated memory is still 117.4MB. Free memory was 76.7MB in the beginning and 79.1MB in the end (delta: -2.4MB). Peak memory consumption was 37.7MB. Max. memory is 16.1GB. * TraceAbstraction took 17847.41ms. Allocated memory was 117.4MB in the beginning and 226.5MB in the end (delta: 109.1MB). Free memory was 78.6MB in the beginning and 111.5MB in the end (delta: -32.9MB). Peak memory consumption was 73.3MB. Max. memory is 16.1GB. * Witness Printer took 4.08ms. Allocated memory is still 226.5MB. Free memory was 111.5MB in the beginning and 111.0MB in the end (delta: 571.6kB). There was no memory consumed. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - UnprovableResult [Line: 21]: Unable to prove that all allocated memory was freed Unable to prove that all allocated memory was freed Reason: overapproximation of memtrack at line 21. Possible FailurePath: [L39] 0 int* A; [L40] 0 _Atomic int counter; [L41] 0 int N; [L66] 0 pthread_t t1, t2; [L68] 0 N = __VERIFIER_nondet_int() [L69] CALL, EXPR 0 create_fresh_int_array(N) [L84] CALL 0 assume_abort_if_not(size >= 0) [L36] COND FALSE 0 !(!cond) [L84] RET 0 assume_abort_if_not(size >= 0) [L85] CALL 0 assume_abort_if_not(size <= (((size_t) 4294967295) / sizeof(int))) [L36] COND FALSE 0 !(!cond) [L85] RET 0 assume_abort_if_not(size <= (((size_t) 4294967295) / sizeof(int))) [L87] 0 int* arr = (int*)malloc(sizeof(int) * (size_t)size); [L88] 0 int i = 0; VAL [A={0:0}, N=1, \old(size)=1, arr={-2:0}, counter=0, i=0, size=1] [L88] COND TRUE 0 i < size [L89] 0 arr[i] = __VERIFIER_nondet_int() [L88] 0 i++ VAL [A={0:0}, N=1, \old(size)=1, arr={-2:0}, counter=0, i=1, size=1] [L88] COND FALSE 0 !(i < size) [L91] 0 return arr; [L69] RET, EXPR 0 create_fresh_int_array(N) [L69] 0 A = create_fresh_int_array(N) [L72] FCALL, FORK 0 pthread_create(&t1, 0, thread1, 0) VAL [A={-2:0}, N=1, counter=0, t1=-1] [L73] FCALL, FORK 0 pthread_create(&t2, 0, thread2, 0) VAL [A={-2:0}, N=1, counter=0, t1=-1, t2=0] [L48] 1 int i=0; VAL [A={-2:0}, N=1, \old(_argptr)={0:0}, _argptr={0:0}, counter=0, i=0] [L48] COND TRUE 1 i= 0 || a >= -2147483648 - b) [L36] COND FALSE 1 !(!cond) [L101] RET 1 assume_abort_if_not(b >= 0 || a >= -2147483648 - b) [L102] CALL 1 assume_abort_if_not(b <= 0 || a <= 2147483647 - b) [L36] COND FALSE 1 !(!cond) [L102] RET 1 assume_abort_if_not(b <= 0 || a <= 2147483647 - b) [L103] 1 return a + b; [L49] RET, EXPR 1 plus(counter, A[i]) [L49] 1 int tmp = plus(counter, A[i]); [L57] 2 int i=0; VAL [A={-2:0}, N=1, \old(_argptr)={0:0}, _argptr={0:0}, counter=0, i=0] [L57] COND TRUE 2 i= b - 2147483648) [L36] COND FALSE 2 !(!cond) [L95] RET 2 assume_abort_if_not(b <= 0 || a >= b - 2147483648) [L96] CALL 2 assume_abort_if_not(b >= 0 || a <= b + 2147483647) [L36] COND FALSE 2 !(!cond) [L96] RET 2 assume_abort_if_not(b >= 0 || a <= b + 2147483647) [L97] 2 return a - b; [L58] RET, EXPR 2 minus(counter, A[i]) [L58] 2 int tmp = minus(counter, A[i]); [L59] 2 counter = tmp VAL [A={-2:0}, N=1, \old(_argptr)={0:0}, _argptr={0:0}, counter=5, i=0, tmp=5] [L57] 2 i++ VAL [A={-2:0}, N=1, \old(_argptr)={0:0}, _argptr={0:0}, counter=5, i=1] [L57] COND FALSE 2 !(i main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_30f617b7-f0b1-412a-b7a3-a0ccf9358712/bin/uautomizer-verify-aQ6SnzHsRB 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 -> 387879bf92b16ead997b40b3e249348f8a6b399496756f9bc3c41b6dc3c21353 [2024-11-28 05:25:46,916 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-11-28 05:25:46,926 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-11-28 05:25:46,928 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-11-28 05:25:46,930 INFO L270 PluginConnector]: Initializing CDTParser... [2024-11-28 05:25:46,930 INFO L274 PluginConnector]: CDTParser initialized [2024-11-28 05:25:46,931 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_30f617b7-f0b1-412a-b7a3-a0ccf9358712/bin/uautomizer-verify-aQ6SnzHsRB/../../sv-benchmarks/c/weaver/popl20-bad-counter-queue.wvr.c [2024-11-28 05:25:49,987 INFO L533 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_30f617b7-f0b1-412a-b7a3-a0ccf9358712/bin/uautomizer-verify-aQ6SnzHsRB/data/872742092/9f684f7189a04273b4cefd6f22a2f8c8/FLAGae1e1378f [2024-11-28 05:25:50,234 INFO L384 CDTParser]: Found 1 translation units. [2024-11-28 05:25:50,235 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_30f617b7-f0b1-412a-b7a3-a0ccf9358712/sv-benchmarks/c/weaver/popl20-bad-counter-queue.wvr.c [2024-11-28 05:25:50,254 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_30f617b7-f0b1-412a-b7a3-a0ccf9358712/bin/uautomizer-verify-aQ6SnzHsRB/data/872742092/9f684f7189a04273b4cefd6f22a2f8c8/FLAGae1e1378f [2024-11-28 05:25:50,281 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_30f617b7-f0b1-412a-b7a3-a0ccf9358712/bin/uautomizer-verify-aQ6SnzHsRB/data/872742092/9f684f7189a04273b4cefd6f22a2f8c8 [2024-11-28 05:25:50,284 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-11-28 05:25:50,286 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2024-11-28 05:25:50,289 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-11-28 05:25:50,290 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-11-28 05:25:50,295 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-11-28 05:25:50,296 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.11 05:25:50" (1/1) ... [2024-11-28 05:25:50,297 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@4600fefc and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 05:25:50, skipping insertion in model container [2024-11-28 05:25:50,300 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.11 05:25:50" (1/1) ... [2024-11-28 05:25:50,321 INFO L175 MainTranslator]: Built tables and reachable declarations [2024-11-28 05:25:50,567 WARN L1063 CHandler]: saw a pointer cast to a type that we could not get a type size for, not adapting memory model [2024-11-28 05:25:50,582 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-28 05:25:50,601 INFO L200 MainTranslator]: Completed pre-run [2024-11-28 05:25:50,643 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-28 05:25:50,667 INFO L204 MainTranslator]: Completed translation [2024-11-28 05:25:50,668 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 05:25:50 WrapperNode [2024-11-28 05:25:50,669 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-11-28 05:25:50,670 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-11-28 05:25:50,670 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-11-28 05:25:50,670 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-11-28 05:25:50,678 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 05:25:50" (1/1) ... [2024-11-28 05:25:50,695 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 05:25:50" (1/1) ... [2024-11-28 05:25:50,732 INFO L138 Inliner]: procedures = 25, calls = 23, calls flagged for inlining = 13, calls inlined = 13, statements flattened = 129 [2024-11-28 05:25:50,735 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-11-28 05:25:50,736 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-11-28 05:25:50,736 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-11-28 05:25:50,737 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-11-28 05:25:50,748 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 05:25:50" (1/1) ... [2024-11-28 05:25:50,749 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 05:25:50" (1/1) ... [2024-11-28 05:25:50,752 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 05:25:50" (1/1) ... [2024-11-28 05:25:50,780 INFO L175 MemorySlicer]: Split 5 memory accesses to 2 slices as follows [2, 3]. 60 percent of accesses are in the largest equivalence class. The 2 initializations are split as follows [2, 0]. The 1 writes are split as follows [0, 1]. [2024-11-28 05:25:50,780 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 05:25:50" (1/1) ... [2024-11-28 05:25:50,781 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 05:25:50" (1/1) ... [2024-11-28 05:25:50,790 INFO L184 PluginConnector]: Executing the observer ReplaceArrayAssignments from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 05:25:50" (1/1) ... [2024-11-28 05:25:50,791 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 05:25:50" (1/1) ... [2024-11-28 05:25:50,795 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 05:25:50" (1/1) ... [2024-11-28 05:25:50,796 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 05:25:50" (1/1) ... [2024-11-28 05:25:50,798 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 05:25:50" (1/1) ... [2024-11-28 05:25:50,800 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-11-28 05:25:50,801 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-11-28 05:25:50,801 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-11-28 05:25:50,802 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-11-28 05:25:50,803 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 05:25:50" (1/1) ... [2024-11-28 05:25:50,809 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-11-28 05:25:50,822 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_30f617b7-f0b1-412a-b7a3-a0ccf9358712/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 05:25:50,836 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_30f617b7-f0b1-412a-b7a3-a0ccf9358712/bin/uautomizer-verify-aQ6SnzHsRB/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (exit command is (exit), workingDir is null) [2024-11-28 05:25:50,843 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_30f617b7-f0b1-412a-b7a3-a0ccf9358712/bin/uautomizer-verify-aQ6SnzHsRB/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Waiting until timeout for monitored process [2024-11-28 05:25:50,869 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-11-28 05:25:50,869 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2024-11-28 05:25:50,870 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2024-11-28 05:25:50,870 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2024-11-28 05:25:50,870 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2024-11-28 05:25:50,870 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1#0 [2024-11-28 05:25:50,870 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1#1 [2024-11-28 05:25:50,870 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2024-11-28 05:25:50,870 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE4#0 [2024-11-28 05:25:50,870 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE4#1 [2024-11-28 05:25:50,870 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-11-28 05:25:50,870 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-11-28 05:25:50,870 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE4#0 [2024-11-28 05:25:50,870 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE4#1 [2024-11-28 05:25:50,872 WARN L203 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement. [2024-11-28 05:25:50,972 INFO L234 CfgBuilder]: Building ICFG [2024-11-28 05:25:50,974 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2024-11-28 05:25:51,393 INFO L279 CfgBuilder]: Omitted future-live optimization because the input is a concurrent program. [2024-11-28 05:25:51,393 INFO L283 CfgBuilder]: Performing block encoding [2024-11-28 05:25:51,823 INFO L307 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-11-28 05:25:51,827 INFO L312 CfgBuilder]: Removed 3 assume(true) statements. [2024-11-28 05:25:51,827 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.11 05:25:51 BoogieIcfgContainer [2024-11-28 05:25:51,828 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-11-28 05:25:51,830 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-11-28 05:25:51,831 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-11-28 05:25:51,836 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-11-28 05:25:51,836 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 28.11 05:25:50" (1/3) ... [2024-11-28 05:25:51,837 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5869a98f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 28.11 05:25:51, skipping insertion in model container [2024-11-28 05:25:51,837 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 05:25:50" (2/3) ... [2024-11-28 05:25:51,837 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5869a98f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 28.11 05:25:51, skipping insertion in model container [2024-11-28 05:25:51,838 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.11 05:25:51" (3/3) ... [2024-11-28 05:25:51,839 INFO L128 eAbstractionObserver]: Analyzing ICFG popl20-bad-counter-queue.wvr.c [2024-11-28 05:25:51,855 INFO L216 ceAbstractionStarter]: Automizer settings: Hoare:None NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-11-28 05:25:51,857 INFO L151 ceAbstractionStarter]: Applying trace abstraction to ICFG popl20-bad-counter-queue.wvr.c that has 3 procedures, 33 locations, 1 initial locations, 3 loop locations, and 8 error locations. [2024-11-28 05:25:51,857 INFO L491 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2024-11-28 05:25:51,936 INFO L143 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2024-11-28 05:25:51,981 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 39 places, 35 transitions, 84 flow [2024-11-28 05:25:52,019 INFO L124 PetriNetUnfolderBase]: 3/33 cut-off events. [2024-11-28 05:25:52,023 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2024-11-28 05:25:52,028 INFO L83 FinitePrefix]: Finished finitePrefix Result has 42 conditions, 33 events. 3/33 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 53 event pairs, 0 based on Foata normal form. 0/22 useless extension candidates. Maximal degree in co-relation 21. Up to 2 conditions per place. [2024-11-28 05:25:52,028 INFO L82 GeneralOperation]: Start removeDead. Operand has 39 places, 35 transitions, 84 flow [2024-11-28 05:25:52,033 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 36 places, 32 transitions, 76 flow [2024-11-28 05:25:52,044 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-11-28 05:25:52,062 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;@53060777, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-11-28 05:25:52,062 INFO L334 AbstractCegarLoop]: Starting to check reachability of 14 error locations. [2024-11-28 05:25:52,066 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2024-11-28 05:25:52,067 INFO L124 PetriNetUnfolderBase]: 1/4 cut-off events. [2024-11-28 05:25:52,067 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-11-28 05:25:52,067 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-28 05:25:52,068 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2024-11-28 05:25:52,068 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 11 more)] === [2024-11-28 05:25:52,074 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 05:25:52,075 INFO L85 PathProgramCache]: Analyzing trace with hash 446140, now seen corresponding path program 1 times [2024-11-28 05:25:52,087 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2024-11-28 05:25:52,088 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1152882993] [2024-11-28 05:25:52,088 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-28 05:25:52,089 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 05:25:52,089 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_30f617b7-f0b1-412a-b7a3-a0ccf9358712/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 05:25:52,091 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_30f617b7-f0b1-412a-b7a3-a0ccf9358712/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 05:25:52,096 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_30f617b7-f0b1-412a-b7a3-a0ccf9358712/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2024-11-28 05:25:52,195 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 05:25:52,200 INFO L256 TraceCheckSpWp]: Trace formula consists of 29 conjuncts, 3 conjuncts are in the unsatisfiable core [2024-11-28 05:25:52,204 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 05:25:52,289 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 7 [2024-11-28 05:25:52,309 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-28 05:25:52,309 INFO L308 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-28 05:25:52,310 INFO L136 FreeRefinementEngine]: Strategy FOX found an infeasible trace [2024-11-28 05:25:52,310 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1152882993] [2024-11-28 05:25:52,311 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1152882993] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-28 05:25:52,311 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-28 05:25:52,311 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2024-11-28 05:25:52,313 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1103861749] [2024-11-28 05:25:52,313 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-28 05:25:52,320 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-28 05:25:52,325 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FOX [2024-11-28 05:25:52,346 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-28 05:25:52,347 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-28 05:25:52,372 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 35 [2024-11-28 05:25:52,375 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 36 places, 32 transitions, 76 flow. Second operand has 3 states, 3 states have (on average 14.0) internal successors, (42), 3 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 05:25:52,376 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-28 05:25:52,376 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 35 [2024-11-28 05:25:52,377 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-28 05:25:52,551 INFO L124 PetriNetUnfolderBase]: 62/153 cut-off events. [2024-11-28 05:25:52,552 INFO L125 PetriNetUnfolderBase]: For 14/14 co-relation queries the response was YES. [2024-11-28 05:25:52,553 INFO L83 FinitePrefix]: Finished finitePrefix Result has 283 conditions, 153 events. 62/153 cut-off events. For 14/14 co-relation queries the response was YES. Maximal size of possible extension queue 20. Compared 606 event pairs, 42 based on Foata normal form. 1/140 useless extension candidates. Maximal degree in co-relation 240. Up to 109 conditions per place. [2024-11-28 05:25:52,556 INFO L140 encePairwiseOnDemand]: 31/35 looper letters, 17 selfloop transitions, 2 changer transitions 0/29 dead transitions. [2024-11-28 05:25:52,556 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 35 places, 29 transitions, 108 flow [2024-11-28 05:25:52,559 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-28 05:25:52,562 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-11-28 05:25:52,572 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 60 transitions. [2024-11-28 05:25:52,573 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.5714285714285714 [2024-11-28 05:25:52,575 INFO L175 Difference]: Start difference. First operand has 36 places, 32 transitions, 76 flow. Second operand 3 states and 60 transitions. [2024-11-28 05:25:52,576 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 35 places, 29 transitions, 108 flow [2024-11-28 05:25:52,581 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 31 places, 29 transitions, 100 flow, removed 0 selfloop flow, removed 4 redundant places. [2024-11-28 05:25:52,584 INFO L231 Difference]: Finished difference. Result has 31 places, 29 transitions, 66 flow [2024-11-28 05:25:52,587 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=35, PETRI_DIFFERENCE_MINUEND_FLOW=62, PETRI_DIFFERENCE_MINUEND_PLACES=29, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=29, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=27, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=66, PETRI_PLACES=31, PETRI_TRANSITIONS=29} [2024-11-28 05:25:52,591 INFO L279 CegarLoopForPetriNet]: 36 programPoint places, -5 predicate places. [2024-11-28 05:25:52,591 INFO L471 AbstractCegarLoop]: Abstraction has has 31 places, 29 transitions, 66 flow [2024-11-28 05:25:52,592 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 14.0) internal successors, (42), 3 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 05:25:52,592 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-28 05:25:52,592 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2024-11-28 05:25:52,603 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_30f617b7-f0b1-412a-b7a3-a0ccf9358712/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2024-11-28 05:25:52,796 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_30f617b7-f0b1-412a-b7a3-a0ccf9358712/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 05:25:52,796 INFO L396 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 11 more)] === [2024-11-28 05:25:52,798 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 05:25:52,798 INFO L85 PathProgramCache]: Analyzing trace with hash 446141, now seen corresponding path program 1 times [2024-11-28 05:25:52,801 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2024-11-28 05:25:52,801 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1857347439] [2024-11-28 05:25:52,802 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-28 05:25:52,802 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 05:25:52,802 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_30f617b7-f0b1-412a-b7a3-a0ccf9358712/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 05:25:52,804 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_30f617b7-f0b1-412a-b7a3-a0ccf9358712/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 05:25:52,809 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_30f617b7-f0b1-412a-b7a3-a0ccf9358712/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2024-11-28 05:25:52,885 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 05:25:52,888 INFO L256 TraceCheckSpWp]: Trace formula consists of 29 conjuncts, 7 conjuncts are in the unsatisfiable core [2024-11-28 05:25:52,890 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 05:25:52,918 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 8 treesize of output 7 [2024-11-28 05:25:53,043 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-28 05:25:53,043 INFO L308 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-28 05:25:53,044 INFO L136 FreeRefinementEngine]: Strategy FOX found an infeasible trace [2024-11-28 05:25:53,044 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1857347439] [2024-11-28 05:25:53,044 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1857347439] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-28 05:25:53,044 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-28 05:25:53,045 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-11-28 05:25:53,045 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [685126768] [2024-11-28 05:25:53,045 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-28 05:25:53,046 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-28 05:25:53,046 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FOX [2024-11-28 05:25:53,047 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-28 05:25:53,047 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-11-28 05:25:53,093 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 35 [2024-11-28 05:25:53,093 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 31 places, 29 transitions, 66 flow. Second operand has 4 states, 4 states have (on average 13.75) internal successors, (55), 4 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 05:25:53,093 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-28 05:25:53,093 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 35 [2024-11-28 05:25:53,094 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-28 05:25:53,396 INFO L124 PetriNetUnfolderBase]: 63/156 cut-off events. [2024-11-28 05:25:53,396 INFO L125 PetriNetUnfolderBase]: For 3/3 co-relation queries the response was YES. [2024-11-28 05:25:53,397 INFO L83 FinitePrefix]: Finished finitePrefix Result has 282 conditions, 156 events. 63/156 cut-off events. For 3/3 co-relation queries the response was YES. Maximal size of possible extension queue 20. Compared 620 event pairs, 42 based on Foata normal form. 0/142 useless extension candidates. Maximal degree in co-relation 260. Up to 114 conditions per place. [2024-11-28 05:25:53,398 INFO L140 encePairwiseOnDemand]: 30/35 looper letters, 19 selfloop transitions, 4 changer transitions 0/32 dead transitions. [2024-11-28 05:25:53,398 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 34 places, 32 transitions, 120 flow [2024-11-28 05:25:53,401 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-11-28 05:25:53,401 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-11-28 05:25:53,403 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 76 transitions. [2024-11-28 05:25:53,403 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.5428571428571428 [2024-11-28 05:25:53,404 INFO L175 Difference]: Start difference. First operand has 31 places, 29 transitions, 66 flow. Second operand 4 states and 76 transitions. [2024-11-28 05:25:53,404 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 34 places, 32 transitions, 120 flow [2024-11-28 05:25:53,406 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 32 places, 32 transitions, 114 flow, removed 0 selfloop flow, removed 2 redundant places. [2024-11-28 05:25:53,409 INFO L231 Difference]: Finished difference. Result has 34 places, 32 transitions, 89 flow [2024-11-28 05:25:53,409 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=35, PETRI_DIFFERENCE_MINUEND_FLOW=62, PETRI_DIFFERENCE_MINUEND_PLACES=29, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=29, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=25, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=89, PETRI_PLACES=34, PETRI_TRANSITIONS=32} [2024-11-28 05:25:53,410 INFO L279 CegarLoopForPetriNet]: 36 programPoint places, -2 predicate places. [2024-11-28 05:25:53,410 INFO L471 AbstractCegarLoop]: Abstraction has has 34 places, 32 transitions, 89 flow [2024-11-28 05:25:53,410 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 13.75) internal successors, (55), 4 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 05:25:53,410 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-28 05:25:53,410 INFO L206 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1] [2024-11-28 05:25:53,422 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_30f617b7-f0b1-412a-b7a3-a0ccf9358712/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2024-11-28 05:25:53,611 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_30f617b7-f0b1-412a-b7a3-a0ccf9358712/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 05:25:53,611 INFO L396 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 11 more)] === [2024-11-28 05:25:53,612 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 05:25:53,612 INFO L85 PathProgramCache]: Analyzing trace with hash 428755192, now seen corresponding path program 1 times [2024-11-28 05:25:53,612 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2024-11-28 05:25:53,612 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [454769111] [2024-11-28 05:25:53,612 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-28 05:25:53,612 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 05:25:53,613 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_30f617b7-f0b1-412a-b7a3-a0ccf9358712/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 05:25:53,614 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_30f617b7-f0b1-412a-b7a3-a0ccf9358712/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 05:25:53,616 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_30f617b7-f0b1-412a-b7a3-a0ccf9358712/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2024-11-28 05:25:53,695 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 05:25:53,699 INFO L256 TraceCheckSpWp]: Trace formula consists of 38 conjuncts, 8 conjuncts are in the unsatisfiable core [2024-11-28 05:25:53,700 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 05:25:53,719 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 8 treesize of output 7 [2024-11-28 05:25:53,949 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-28 05:25:53,950 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-28 05:25:54,232 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-28 05:25:54,232 INFO L136 FreeRefinementEngine]: Strategy FOX found an infeasible trace [2024-11-28 05:25:54,232 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [454769111] [2024-11-28 05:25:54,232 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [454769111] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-28 05:25:54,232 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-11-28 05:25:54,232 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3] total 6 [2024-11-28 05:25:54,233 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [830491088] [2024-11-28 05:25:54,233 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-11-28 05:25:54,233 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-11-28 05:25:54,233 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FOX [2024-11-28 05:25:54,234 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-11-28 05:25:54,234 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-11-28 05:25:54,452 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 35 [2024-11-28 05:25:54,453 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 34 places, 32 transitions, 89 flow. Second operand has 8 states, 8 states have (on average 14.25) internal successors, (114), 8 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 05:25:54,453 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-28 05:25:54,453 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 35 [2024-11-28 05:25:54,453 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-28 05:25:55,217 INFO L124 PetriNetUnfolderBase]: 66/165 cut-off events. [2024-11-28 05:25:55,217 INFO L125 PetriNetUnfolderBase]: For 3/3 co-relation queries the response was YES. [2024-11-28 05:25:55,218 INFO L83 FinitePrefix]: Finished finitePrefix Result has 319 conditions, 165 events. 66/165 cut-off events. For 3/3 co-relation queries the response was YES. Maximal size of possible extension queue 21. Compared 673 event pairs, 42 based on Foata normal form. 0/147 useless extension candidates. Maximal degree in co-relation 267. Up to 117 conditions per place. [2024-11-28 05:25:55,219 INFO L140 encePairwiseOnDemand]: 30/35 looper letters, 19 selfloop transitions, 13 changer transitions 0/41 dead transitions. [2024-11-28 05:25:55,219 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 43 places, 41 transitions, 189 flow [2024-11-28 05:25:55,220 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-11-28 05:25:55,221 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-11-28 05:25:55,222 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 165 transitions. [2024-11-28 05:25:55,223 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.4714285714285714 [2024-11-28 05:25:55,223 INFO L175 Difference]: Start difference. First operand has 34 places, 32 transitions, 89 flow. Second operand 10 states and 165 transitions. [2024-11-28 05:25:55,223 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 43 places, 41 transitions, 189 flow [2024-11-28 05:25:55,224 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 42 places, 41 transitions, 186 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-11-28 05:25:55,225 INFO L231 Difference]: Finished difference. Result has 45 places, 41 transitions, 166 flow [2024-11-28 05:25:55,226 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=35, PETRI_DIFFERENCE_MINUEND_FLOW=86, PETRI_DIFFERENCE_MINUEND_PLACES=33, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=32, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=25, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=166, PETRI_PLACES=45, PETRI_TRANSITIONS=41} [2024-11-28 05:25:55,226 INFO L279 CegarLoopForPetriNet]: 36 programPoint places, 9 predicate places. [2024-11-28 05:25:55,227 INFO L471 AbstractCegarLoop]: Abstraction has has 45 places, 41 transitions, 166 flow [2024-11-28 05:25:55,227 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 14.25) internal successors, (114), 8 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 05:25:55,227 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-28 05:25:55,227 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1] [2024-11-28 05:25:55,238 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_30f617b7-f0b1-412a-b7a3-a0ccf9358712/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2024-11-28 05:25:55,431 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_30f617b7-f0b1-412a-b7a3-a0ccf9358712/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 05:25:55,431 INFO L396 AbstractCegarLoop]: === Iteration 4 === Targeting thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 11 more)] === [2024-11-28 05:25:55,432 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 05:25:55,432 INFO L85 PathProgramCache]: Analyzing trace with hash 408917787, now seen corresponding path program 1 times [2024-11-28 05:25:55,433 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2024-11-28 05:25:55,433 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [561587491] [2024-11-28 05:25:55,433 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-28 05:25:55,433 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 05:25:55,433 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_30f617b7-f0b1-412a-b7a3-a0ccf9358712/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 05:25:55,435 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_30f617b7-f0b1-412a-b7a3-a0ccf9358712/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 05:25:55,437 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_30f617b7-f0b1-412a-b7a3-a0ccf9358712/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2024-11-28 05:25:55,506 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 05:25:55,507 INFO L256 TraceCheckSpWp]: Trace formula consists of 44 conjuncts, 5 conjuncts are in the unsatisfiable core [2024-11-28 05:25:55,508 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 05:25:55,519 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 7 [2024-11-28 05:25:55,549 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-28 05:25:55,549 INFO L308 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-28 05:25:55,549 INFO L136 FreeRefinementEngine]: Strategy FOX found an infeasible trace [2024-11-28 05:25:55,549 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [561587491] [2024-11-28 05:25:55,550 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [561587491] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-28 05:25:55,550 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-28 05:25:55,550 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-11-28 05:25:55,550 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [714095400] [2024-11-28 05:25:55,550 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-28 05:25:55,550 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-28 05:25:55,550 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FOX [2024-11-28 05:25:55,551 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-28 05:25:55,551 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-11-28 05:25:55,599 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 35 [2024-11-28 05:25:55,599 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 45 places, 41 transitions, 166 flow. Second operand has 4 states, 4 states have (on average 12.25) internal successors, (49), 4 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 05:25:55,599 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-28 05:25:55,599 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 35 [2024-11-28 05:25:55,599 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-28 05:25:55,730 INFO L124 PetriNetUnfolderBase]: 66/155 cut-off events. [2024-11-28 05:25:55,730 INFO L125 PetriNetUnfolderBase]: For 12/12 co-relation queries the response was YES. [2024-11-28 05:25:55,731 INFO L83 FinitePrefix]: Finished finitePrefix Result has 331 conditions, 155 events. 66/155 cut-off events. For 12/12 co-relation queries the response was YES. Maximal size of possible extension queue 18. Compared 573 event pairs, 42 based on Foata normal form. 0/151 useless extension candidates. Maximal degree in co-relation 297. Up to 112 conditions per place. [2024-11-28 05:25:55,732 INFO L140 encePairwiseOnDemand]: 31/35 looper letters, 25 selfloop transitions, 6 changer transitions 0/39 dead transitions. [2024-11-28 05:25:55,732 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 46 places, 39 transitions, 224 flow [2024-11-28 05:25:55,733 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-11-28 05:25:55,733 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-11-28 05:25:55,734 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 65 transitions. [2024-11-28 05:25:55,734 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.4642857142857143 [2024-11-28 05:25:55,734 INFO L175 Difference]: Start difference. First operand has 45 places, 41 transitions, 166 flow. Second operand 4 states and 65 transitions. [2024-11-28 05:25:55,734 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 46 places, 39 transitions, 224 flow [2024-11-28 05:25:55,736 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 43 places, 39 transitions, 194 flow, removed 11 selfloop flow, removed 3 redundant places. [2024-11-28 05:25:55,738 INFO L231 Difference]: Finished difference. Result has 43 places, 39 transitions, 144 flow [2024-11-28 05:25:55,738 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=35, PETRI_DIFFERENCE_MINUEND_FLOW=132, PETRI_DIFFERENCE_MINUEND_PLACES=40, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=39, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=33, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=144, PETRI_PLACES=43, PETRI_TRANSITIONS=39} [2024-11-28 05:25:55,739 INFO L279 CegarLoopForPetriNet]: 36 programPoint places, 7 predicate places. [2024-11-28 05:25:55,739 INFO L471 AbstractCegarLoop]: Abstraction has has 43 places, 39 transitions, 144 flow [2024-11-28 05:25:55,740 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 12.25) internal successors, (49), 4 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 05:25:55,740 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-28 05:25:55,740 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1] [2024-11-28 05:25:55,750 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_30f617b7-f0b1-412a-b7a3-a0ccf9358712/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2024-11-28 05:25:55,940 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_30f617b7-f0b1-412a-b7a3-a0ccf9358712/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 05:25:55,941 INFO L396 AbstractCegarLoop]: === Iteration 5 === Targeting thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 11 more)] === [2024-11-28 05:25:55,941 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 05:25:55,941 INFO L85 PathProgramCache]: Analyzing trace with hash 408917788, now seen corresponding path program 1 times [2024-11-28 05:25:55,941 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2024-11-28 05:25:55,941 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [421841248] [2024-11-28 05:25:55,942 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-28 05:25:55,942 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 05:25:55,942 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_30f617b7-f0b1-412a-b7a3-a0ccf9358712/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 05:25:55,945 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_30f617b7-f0b1-412a-b7a3-a0ccf9358712/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 05:25:55,947 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_30f617b7-f0b1-412a-b7a3-a0ccf9358712/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2024-11-28 05:25:56,009 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 05:25:56,011 INFO L256 TraceCheckSpWp]: Trace formula consists of 44 conjuncts, 8 conjuncts are in the unsatisfiable core [2024-11-28 05:25:56,013 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 05:25:56,111 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-28 05:25:56,112 INFO L308 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-28 05:25:56,112 INFO L136 FreeRefinementEngine]: Strategy FOX found an infeasible trace [2024-11-28 05:25:56,112 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [421841248] [2024-11-28 05:25:56,112 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [421841248] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-28 05:25:56,112 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-28 05:25:56,112 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-11-28 05:25:56,112 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1294035825] [2024-11-28 05:25:56,112 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-28 05:25:56,113 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-11-28 05:25:56,113 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FOX [2024-11-28 05:25:56,113 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-11-28 05:25:56,113 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2024-11-28 05:25:56,155 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 35 [2024-11-28 05:25:56,155 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 43 places, 39 transitions, 144 flow. Second operand has 5 states, 5 states have (on average 14.0) internal successors, (70), 5 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 05:25:56,155 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-28 05:25:56,156 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 35 [2024-11-28 05:25:56,156 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-28 05:25:56,410 INFO L124 PetriNetUnfolderBase]: 116/270 cut-off events. [2024-11-28 05:25:56,410 INFO L125 PetriNetUnfolderBase]: For 12/12 co-relation queries the response was YES. [2024-11-28 05:25:56,413 INFO L83 FinitePrefix]: Finished finitePrefix Result has 539 conditions, 270 events. 116/270 cut-off events. For 12/12 co-relation queries the response was YES. Maximal size of possible extension queue 26. Compared 1180 event pairs, 72 based on Foata normal form. 0/255 useless extension candidates. Maximal degree in co-relation 508. Up to 145 conditions per place. [2024-11-28 05:25:56,415 INFO L140 encePairwiseOnDemand]: 29/35 looper letters, 47 selfloop transitions, 5 changer transitions 0/59 dead transitions. [2024-11-28 05:25:56,417 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 47 places, 59 transitions, 293 flow [2024-11-28 05:25:56,417 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-11-28 05:25:56,417 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-11-28 05:25:56,418 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 109 transitions. [2024-11-28 05:25:56,419 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.6228571428571429 [2024-11-28 05:25:56,419 INFO L175 Difference]: Start difference. First operand has 43 places, 39 transitions, 144 flow. Second operand 5 states and 109 transitions. [2024-11-28 05:25:56,419 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 47 places, 59 transitions, 293 flow [2024-11-28 05:25:56,424 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 45 places, 59 transitions, 286 flow, removed 0 selfloop flow, removed 2 redundant places. [2024-11-28 05:25:56,425 INFO L231 Difference]: Finished difference. Result has 47 places, 41 transitions, 162 flow [2024-11-28 05:25:56,426 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=35, PETRI_DIFFERENCE_MINUEND_FLOW=137, PETRI_DIFFERENCE_MINUEND_PLACES=41, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=39, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=34, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=162, PETRI_PLACES=47, PETRI_TRANSITIONS=41} [2024-11-28 05:25:56,428 INFO L279 CegarLoopForPetriNet]: 36 programPoint places, 11 predicate places. [2024-11-28 05:25:56,429 INFO L471 AbstractCegarLoop]: Abstraction has has 47 places, 41 transitions, 162 flow [2024-11-28 05:25:56,430 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 14.0) internal successors, (70), 5 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 05:25:56,430 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-28 05:25:56,430 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 05:25:56,440 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_30f617b7-f0b1-412a-b7a3-a0ccf9358712/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2024-11-28 05:25:56,630 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_30f617b7-f0b1-412a-b7a3-a0ccf9358712/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 05:25:56,631 INFO L396 AbstractCegarLoop]: === Iteration 6 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 11 more)] === [2024-11-28 05:25:56,631 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 05:25:56,631 INFO L85 PathProgramCache]: Analyzing trace with hash 2117382407, now seen corresponding path program 1 times [2024-11-28 05:25:56,632 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2024-11-28 05:25:56,632 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1724072070] [2024-11-28 05:25:56,632 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-28 05:25:56,632 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 05:25:56,632 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_30f617b7-f0b1-412a-b7a3-a0ccf9358712/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 05:25:56,634 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_30f617b7-f0b1-412a-b7a3-a0ccf9358712/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 05:25:56,635 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_30f617b7-f0b1-412a-b7a3-a0ccf9358712/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2024-11-28 05:25:56,708 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 05:25:56,712 INFO L256 TraceCheckSpWp]: Trace formula consists of 52 conjuncts, 8 conjuncts are in the unsatisfiable core [2024-11-28 05:25:56,713 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 05:25:56,803 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-28 05:25:56,803 INFO L308 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-28 05:25:56,803 INFO L136 FreeRefinementEngine]: Strategy FOX found an infeasible trace [2024-11-28 05:25:56,803 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1724072070] [2024-11-28 05:25:56,803 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1724072070] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-28 05:25:56,804 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-28 05:25:56,804 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-11-28 05:25:56,804 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1294020840] [2024-11-28 05:25:56,804 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-28 05:25:56,804 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-11-28 05:25:56,805 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FOX [2024-11-28 05:25:56,805 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-11-28 05:25:56,805 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2024-11-28 05:25:56,836 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 35 [2024-11-28 05:25:56,836 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 47 places, 41 transitions, 162 flow. Second operand has 5 states, 5 states have (on average 14.4) internal successors, (72), 5 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 05:25:56,836 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-28 05:25:56,837 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 35 [2024-11-28 05:25:56,837 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-28 05:25:57,054 INFO L124 PetriNetUnfolderBase]: 100/221 cut-off events. [2024-11-28 05:25:57,054 INFO L125 PetriNetUnfolderBase]: For 73/82 co-relation queries the response was YES. [2024-11-28 05:25:57,055 INFO L83 FinitePrefix]: Finished finitePrefix Result has 527 conditions, 221 events. 100/221 cut-off events. For 73/82 co-relation queries the response was YES. Maximal size of possible extension queue 20. Compared 822 event pairs, 67 based on Foata normal form. 0/208 useless extension candidates. Maximal degree in co-relation 494. Up to 143 conditions per place. [2024-11-28 05:25:57,056 INFO L140 encePairwiseOnDemand]: 29/35 looper letters, 42 selfloop transitions, 5 changer transitions 0/54 dead transitions. [2024-11-28 05:25:57,056 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 51 places, 54 transitions, 295 flow [2024-11-28 05:25:57,058 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-11-28 05:25:57,059 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-11-28 05:25:57,060 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 104 transitions. [2024-11-28 05:25:57,060 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.5942857142857143 [2024-11-28 05:25:57,060 INFO L175 Difference]: Start difference. First operand has 47 places, 41 transitions, 162 flow. Second operand 5 states and 104 transitions. [2024-11-28 05:25:57,063 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 51 places, 54 transitions, 295 flow [2024-11-28 05:25:57,065 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 49 places, 54 transitions, 290 flow, removed 0 selfloop flow, removed 2 redundant places. [2024-11-28 05:25:57,066 INFO L231 Difference]: Finished difference. Result has 51 places, 43 transitions, 182 flow [2024-11-28 05:25:57,067 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=35, PETRI_DIFFERENCE_MINUEND_FLOW=157, PETRI_DIFFERENCE_MINUEND_PLACES=45, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=41, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=36, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=182, PETRI_PLACES=51, PETRI_TRANSITIONS=43} [2024-11-28 05:25:57,067 INFO L279 CegarLoopForPetriNet]: 36 programPoint places, 15 predicate places. [2024-11-28 05:25:57,068 INFO L471 AbstractCegarLoop]: Abstraction has has 51 places, 43 transitions, 182 flow [2024-11-28 05:25:57,068 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 14.4) internal successors, (72), 5 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 05:25:57,068 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-28 05:25:57,068 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 05:25:57,079 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_30f617b7-f0b1-412a-b7a3-a0ccf9358712/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2024-11-28 05:25:57,268 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_30f617b7-f0b1-412a-b7a3-a0ccf9358712/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 05:25:57,269 INFO L396 AbstractCegarLoop]: === Iteration 7 === Targeting thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 11 more)] === [2024-11-28 05:25:57,269 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 05:25:57,269 INFO L85 PathProgramCache]: Analyzing trace with hash -183980287, now seen corresponding path program 1 times [2024-11-28 05:25:57,269 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2024-11-28 05:25:57,270 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [194879710] [2024-11-28 05:25:57,270 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-28 05:25:57,270 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 05:25:57,270 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_30f617b7-f0b1-412a-b7a3-a0ccf9358712/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 05:25:57,272 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_30f617b7-f0b1-412a-b7a3-a0ccf9358712/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 05:25:57,273 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_30f617b7-f0b1-412a-b7a3-a0ccf9358712/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2024-11-28 05:25:57,344 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 05:25:57,349 INFO L256 TraceCheckSpWp]: Trace formula consists of 53 conjuncts, 15 conjuncts are in the unsatisfiable core [2024-11-28 05:25:57,351 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 05:25:57,371 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 8 treesize of output 7 [2024-11-28 05:25:57,720 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-28 05:25:57,720 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-28 05:25:58,199 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-28 05:25:58,199 INFO L136 FreeRefinementEngine]: Strategy FOX found an infeasible trace [2024-11-28 05:25:58,199 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [194879710] [2024-11-28 05:25:58,199 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [194879710] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-28 05:25:58,199 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-11-28 05:25:58,200 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 10 [2024-11-28 05:25:58,200 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1424511858] [2024-11-28 05:25:58,200 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-11-28 05:25:58,200 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-11-28 05:25:58,200 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FOX [2024-11-28 05:25:58,201 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-11-28 05:25:58,201 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=98, Unknown=0, NotChecked=0, Total=132 [2024-11-28 05:25:58,720 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 35 [2024-11-28 05:25:58,720 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 51 places, 43 transitions, 182 flow. Second operand has 12 states, 12 states have (on average 13.166666666666666) internal successors, (158), 12 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) [2024-11-28 05:25:58,721 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-28 05:25:58,721 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 35 [2024-11-28 05:25:58,721 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-28 05:26:00,159 INFO L124 PetriNetUnfolderBase]: 311/692 cut-off events. [2024-11-28 05:26:00,159 INFO L125 PetriNetUnfolderBase]: For 169/200 co-relation queries the response was YES. [2024-11-28 05:26:00,161 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1587 conditions, 692 events. 311/692 cut-off events. For 169/200 co-relation queries the response was YES. Maximal size of possible extension queue 48. Compared 3727 event pairs, 138 based on Foata normal form. 0/660 useless extension candidates. Maximal degree in co-relation 1390. Up to 163 conditions per place. [2024-11-28 05:26:00,164 INFO L140 encePairwiseOnDemand]: 26/35 looper letters, 79 selfloop transitions, 23 changer transitions 0/108 dead transitions. [2024-11-28 05:26:00,164 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 63 places, 108 transitions, 564 flow [2024-11-28 05:26:00,165 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2024-11-28 05:26:00,166 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2024-11-28 05:26:00,167 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 255 transitions. [2024-11-28 05:26:00,167 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.5604395604395604 [2024-11-28 05:26:00,167 INFO L175 Difference]: Start difference. First operand has 51 places, 43 transitions, 182 flow. Second operand 13 states and 255 transitions. [2024-11-28 05:26:00,168 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 63 places, 108 transitions, 564 flow [2024-11-28 05:26:00,171 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 61 places, 108 transitions, 559 flow, removed 0 selfloop flow, removed 2 redundant places. [2024-11-28 05:26:00,172 INFO L231 Difference]: Finished difference. Result has 63 places, 54 transitions, 274 flow [2024-11-28 05:26:00,172 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=35, PETRI_DIFFERENCE_MINUEND_FLOW=177, PETRI_DIFFERENCE_MINUEND_PLACES=49, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=43, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=15, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=27, PETRI_DIFFERENCE_SUBTRAHEND_STATES=13, PETRI_FLOW=274, PETRI_PLACES=63, PETRI_TRANSITIONS=54} [2024-11-28 05:26:00,173 INFO L279 CegarLoopForPetriNet]: 36 programPoint places, 27 predicate places. [2024-11-28 05:26:00,173 INFO L471 AbstractCegarLoop]: Abstraction has has 63 places, 54 transitions, 274 flow [2024-11-28 05:26:00,174 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 13.166666666666666) internal successors, (158), 12 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) [2024-11-28 05:26:00,174 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-28 05:26:00,174 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 05:26:00,180 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_30f617b7-f0b1-412a-b7a3-a0ccf9358712/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2024-11-28 05:26:00,374 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_30f617b7-f0b1-412a-b7a3-a0ccf9358712/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 05:26:00,375 INFO L396 AbstractCegarLoop]: === Iteration 8 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 11 more)] === [2024-11-28 05:26:00,375 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 05:26:00,375 INFO L85 PathProgramCache]: Analyzing trace with hash -721984596, now seen corresponding path program 1 times [2024-11-28 05:26:00,375 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2024-11-28 05:26:00,375 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1240852998] [2024-11-28 05:26:00,375 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-28 05:26:00,376 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 05:26:00,376 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_30f617b7-f0b1-412a-b7a3-a0ccf9358712/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 05:26:00,377 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_30f617b7-f0b1-412a-b7a3-a0ccf9358712/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 05:26:00,378 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_30f617b7-f0b1-412a-b7a3-a0ccf9358712/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2024-11-28 05:26:00,449 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 05:26:00,451 INFO L256 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 15 conjuncts are in the unsatisfiable core [2024-11-28 05:26:00,452 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 05:26:00,469 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 8 treesize of output 7 [2024-11-28 05:26:00,826 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-28 05:26:00,826 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-28 05:26:01,284 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-28 05:26:01,284 INFO L136 FreeRefinementEngine]: Strategy FOX found an infeasible trace [2024-11-28 05:26:01,284 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1240852998] [2024-11-28 05:26:01,285 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1240852998] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-28 05:26:01,285 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-11-28 05:26:01,285 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 10 [2024-11-28 05:26:01,285 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1412425691] [2024-11-28 05:26:01,286 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-11-28 05:26:01,286 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-11-28 05:26:01,287 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FOX [2024-11-28 05:26:01,287 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-11-28 05:26:01,287 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=98, Unknown=0, NotChecked=0, Total=132 [2024-11-28 05:26:01,655 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 35 [2024-11-28 05:26:01,656 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 63 places, 54 transitions, 274 flow. Second operand has 12 states, 12 states have (on average 13.5) internal successors, (162), 12 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) [2024-11-28 05:26:01,656 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-28 05:26:01,656 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 35 [2024-11-28 05:26:01,656 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-28 05:26:03,034 INFO L124 PetriNetUnfolderBase]: 405/822 cut-off events. [2024-11-28 05:26:03,034 INFO L125 PetriNetUnfolderBase]: For 1032/1215 co-relation queries the response was YES. [2024-11-28 05:26:03,038 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2282 conditions, 822 events. 405/822 cut-off events. For 1032/1215 co-relation queries the response was YES. Maximal size of possible extension queue 56. Compared 4332 event pairs, 184 based on Foata normal form. 0/784 useless extension candidates. Maximal degree in co-relation 2070. Up to 179 conditions per place. [2024-11-28 05:26:03,043 INFO L140 encePairwiseOnDemand]: 26/35 looper letters, 88 selfloop transitions, 23 changer transitions 0/117 dead transitions. [2024-11-28 05:26:03,043 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 75 places, 117 transitions, 746 flow [2024-11-28 05:26:03,044 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2024-11-28 05:26:03,044 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2024-11-28 05:26:03,046 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 251 transitions. [2024-11-28 05:26:03,047 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.5516483516483517 [2024-11-28 05:26:03,047 INFO L175 Difference]: Start difference. First operand has 63 places, 54 transitions, 274 flow. Second operand 13 states and 251 transitions. [2024-11-28 05:26:03,047 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 75 places, 117 transitions, 746 flow [2024-11-28 05:26:03,055 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 71 places, 117 transitions, 725 flow, removed 5 selfloop flow, removed 4 redundant places. [2024-11-28 05:26:03,057 INFO L231 Difference]: Finished difference. Result has 73 places, 65 transitions, 356 flow [2024-11-28 05:26:03,058 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=35, PETRI_DIFFERENCE_MINUEND_FLOW=259, PETRI_DIFFERENCE_MINUEND_PLACES=59, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=54, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=15, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=38, PETRI_DIFFERENCE_SUBTRAHEND_STATES=13, PETRI_FLOW=356, PETRI_PLACES=73, PETRI_TRANSITIONS=65} [2024-11-28 05:26:03,058 INFO L279 CegarLoopForPetriNet]: 36 programPoint places, 37 predicate places. [2024-11-28 05:26:03,060 INFO L471 AbstractCegarLoop]: Abstraction has has 73 places, 65 transitions, 356 flow [2024-11-28 05:26:03,061 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 13.5) internal successors, (162), 12 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) [2024-11-28 05:26:03,061 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-28 05:26:03,061 INFO L206 CegarLoopForPetriNet]: trace histogram [5, 4, 1, 1] [2024-11-28 05:26:03,070 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_30f617b7-f0b1-412a-b7a3-a0ccf9358712/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Ended with exit code 0 [2024-11-28 05:26:03,261 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_30f617b7-f0b1-412a-b7a3-a0ccf9358712/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 05:26:03,262 INFO L396 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 11 more)] === [2024-11-28 05:26:03,262 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 05:26:03,262 INFO L85 PathProgramCache]: Analyzing trace with hash 690857769, now seen corresponding path program 2 times [2024-11-28 05:26:03,262 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2024-11-28 05:26:03,263 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [984528062] [2024-11-28 05:26:03,263 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-28 05:26:03,263 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 05:26:03,263 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_30f617b7-f0b1-412a-b7a3-a0ccf9358712/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 05:26:03,265 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_30f617b7-f0b1-412a-b7a3-a0ccf9358712/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 05:26:03,268 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_30f617b7-f0b1-412a-b7a3-a0ccf9358712/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2024-11-28 05:26:03,355 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-28 05:26:03,355 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 05:26:03,358 INFO L256 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 12 conjuncts are in the unsatisfiable core [2024-11-28 05:26:03,359 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 05:26:03,374 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 8 treesize of output 7 [2024-11-28 05:26:03,748 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-28 05:26:03,748 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-28 05:26:04,539 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-28 05:26:04,539 INFO L136 FreeRefinementEngine]: Strategy FOX found an infeasible trace [2024-11-28 05:26:04,539 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [984528062] [2024-11-28 05:26:04,539 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [984528062] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-28 05:26:04,539 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-11-28 05:26:04,540 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 12 [2024-11-28 05:26:04,540 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [705068795] [2024-11-28 05:26:04,540 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-11-28 05:26:04,540 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2024-11-28 05:26:04,541 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FOX [2024-11-28 05:26:04,541 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2024-11-28 05:26:04,541 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=129, Unknown=0, NotChecked=0, Total=182 [2024-11-28 05:26:04,994 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 35 [2024-11-28 05:26:04,994 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 73 places, 65 transitions, 356 flow. Second operand has 14 states, 14 states have (on average 14.571428571428571) internal successors, (204), 14 states have internal predecessors, (204), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 05:26:04,995 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-28 05:26:04,995 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 35 [2024-11-28 05:26:04,995 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-28 05:26:07,987 INFO L124 PetriNetUnfolderBase]: 359/798 cut-off events. [2024-11-28 05:26:07,987 INFO L125 PetriNetUnfolderBase]: For 1148/1270 co-relation queries the response was YES. [2024-11-28 05:26:07,993 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2516 conditions, 798 events. 359/798 cut-off events. For 1148/1270 co-relation queries the response was YES. Maximal size of possible extension queue 59. Compared 4442 event pairs, 232 based on Foata normal form. 6/796 useless extension candidates. Maximal degree in co-relation 2209. Up to 601 conditions per place. [2024-11-28 05:26:07,997 INFO L140 encePairwiseOnDemand]: 30/35 looper letters, 45 selfloop transitions, 31 changer transitions 0/83 dead transitions. [2024-11-28 05:26:07,998 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 94 places, 83 transitions, 646 flow [2024-11-28 05:26:07,999 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2024-11-28 05:26:07,999 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2024-11-28 05:26:08,000 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 342 transitions. [2024-11-28 05:26:08,001 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.44415584415584414 [2024-11-28 05:26:08,001 INFO L175 Difference]: Start difference. First operand has 73 places, 65 transitions, 356 flow. Second operand 22 states and 342 transitions. [2024-11-28 05:26:08,001 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 94 places, 83 transitions, 646 flow [2024-11-28 05:26:08,007 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 89 places, 83 transitions, 614 flow, removed 2 selfloop flow, removed 5 redundant places. [2024-11-28 05:26:08,011 INFO L231 Difference]: Finished difference. Result has 95 places, 83 transitions, 554 flow [2024-11-28 05:26:08,013 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=35, PETRI_DIFFERENCE_MINUEND_FLOW=336, PETRI_DIFFERENCE_MINUEND_PLACES=68, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=65, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=16, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=49, PETRI_DIFFERENCE_SUBTRAHEND_STATES=22, PETRI_FLOW=554, PETRI_PLACES=95, PETRI_TRANSITIONS=83} [2024-11-28 05:26:08,014 INFO L279 CegarLoopForPetriNet]: 36 programPoint places, 59 predicate places. [2024-11-28 05:26:08,014 INFO L471 AbstractCegarLoop]: Abstraction has has 95 places, 83 transitions, 554 flow [2024-11-28 05:26:08,014 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 14.571428571428571) internal successors, (204), 14 states have internal predecessors, (204), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 05:26:08,016 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-28 05:26:08,016 INFO L206 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 05:26:08,031 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_30f617b7-f0b1-412a-b7a3-a0ccf9358712/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Ended with exit code 0 [2024-11-28 05:26:08,216 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_30f617b7-f0b1-412a-b7a3-a0ccf9358712/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 05:26:08,216 INFO L396 AbstractCegarLoop]: === Iteration 10 === Targeting thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 11 more)] === [2024-11-28 05:26:08,217 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 05:26:08,217 INFO L85 PathProgramCache]: Analyzing trace with hash -738270106, now seen corresponding path program 1 times [2024-11-28 05:26:08,217 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2024-11-28 05:26:08,217 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1698833473] [2024-11-28 05:26:08,217 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-28 05:26:08,217 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 05:26:08,217 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_30f617b7-f0b1-412a-b7a3-a0ccf9358712/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 05:26:08,219 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_30f617b7-f0b1-412a-b7a3-a0ccf9358712/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 05:26:08,220 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_30f617b7-f0b1-412a-b7a3-a0ccf9358712/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2024-11-28 05:26:08,285 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 05:26:08,288 INFO L256 TraceCheckSpWp]: Trace formula consists of 64 conjuncts, 10 conjuncts are in the unsatisfiable core [2024-11-28 05:26:08,289 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 05:26:08,432 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-28 05:26:08,432 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-28 05:26:08,570 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-28 05:26:08,571 INFO L136 FreeRefinementEngine]: Strategy FOX found an infeasible trace [2024-11-28 05:26:08,571 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1698833473] [2024-11-28 05:26:08,571 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1698833473] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-28 05:26:08,571 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-11-28 05:26:08,571 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 11 [2024-11-28 05:26:08,571 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [874674173] [2024-11-28 05:26:08,571 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-11-28 05:26:08,571 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-11-28 05:26:08,572 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FOX [2024-11-28 05:26:08,572 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-11-28 05:26:08,572 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=92, Unknown=0, NotChecked=0, Total=132 [2024-11-28 05:26:08,709 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 35 [2024-11-28 05:26:08,710 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 95 places, 83 transitions, 554 flow. Second operand has 12 states, 12 states have (on average 14.666666666666666) internal successors, (176), 12 states have internal predecessors, (176), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 05:26:08,710 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-28 05:26:08,710 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 35 [2024-11-28 05:26:08,710 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-28 05:26:09,252 INFO L124 PetriNetUnfolderBase]: 397/821 cut-off events. [2024-11-28 05:26:09,252 INFO L125 PetriNetUnfolderBase]: For 995/1067 co-relation queries the response was YES. [2024-11-28 05:26:09,256 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2652 conditions, 821 events. 397/821 cut-off events. For 995/1067 co-relation queries the response was YES. Maximal size of possible extension queue 52. Compared 4223 event pairs, 193 based on Foata normal form. 14/829 useless extension candidates. Maximal degree in co-relation 2587. Up to 394 conditions per place. [2024-11-28 05:26:09,260 INFO L140 encePairwiseOnDemand]: 27/35 looper letters, 77 selfloop transitions, 29 changer transitions 0/113 dead transitions. [2024-11-28 05:26:09,260 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 101 places, 113 transitions, 896 flow [2024-11-28 05:26:09,260 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-11-28 05:26:09,261 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-11-28 05:26:09,261 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 162 transitions. [2024-11-28 05:26:09,262 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.5785714285714286 [2024-11-28 05:26:09,262 INFO L175 Difference]: Start difference. First operand has 95 places, 83 transitions, 554 flow. Second operand 8 states and 162 transitions. [2024-11-28 05:26:09,262 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 101 places, 113 transitions, 896 flow [2024-11-28 05:26:09,268 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 92 places, 113 transitions, 816 flow, removed 27 selfloop flow, removed 9 redundant places. [2024-11-28 05:26:09,271 INFO L231 Difference]: Finished difference. Result has 93 places, 82 transitions, 538 flow [2024-11-28 05:26:09,273 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=35, PETRI_DIFFERENCE_MINUEND_FLOW=466, PETRI_DIFFERENCE_MINUEND_PLACES=85, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=81, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=28, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=52, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=538, PETRI_PLACES=93, PETRI_TRANSITIONS=82} [2024-11-28 05:26:09,274 INFO L279 CegarLoopForPetriNet]: 36 programPoint places, 57 predicate places. [2024-11-28 05:26:09,274 INFO L471 AbstractCegarLoop]: Abstraction has has 93 places, 82 transitions, 538 flow [2024-11-28 05:26:09,274 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 14.666666666666666) internal successors, (176), 12 states have internal predecessors, (176), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 05:26:09,274 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-28 05:26:09,274 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 05:26:09,287 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_30f617b7-f0b1-412a-b7a3-a0ccf9358712/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2024-11-28 05:26:09,475 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_30f617b7-f0b1-412a-b7a3-a0ccf9358712/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 05:26:09,475 INFO L396 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 11 more)] === [2024-11-28 05:26:09,476 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 05:26:09,476 INFO L85 PathProgramCache]: Analyzing trace with hash 2104713980, now seen corresponding path program 1 times [2024-11-28 05:26:09,476 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2024-11-28 05:26:09,476 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [759834148] [2024-11-28 05:26:09,476 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-28 05:26:09,476 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 05:26:09,476 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_30f617b7-f0b1-412a-b7a3-a0ccf9358712/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 05:26:09,478 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_30f617b7-f0b1-412a-b7a3-a0ccf9358712/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 05:26:09,479 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_30f617b7-f0b1-412a-b7a3-a0ccf9358712/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2024-11-28 05:26:09,535 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 05:26:09,536 INFO L256 TraceCheckSpWp]: Trace formula consists of 67 conjuncts, 2 conjuncts are in the unsatisfiable core [2024-11-28 05:26:09,537 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 05:26:09,565 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-28 05:26:09,565 INFO L308 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-28 05:26:09,565 INFO L136 FreeRefinementEngine]: Strategy FOX found an infeasible trace [2024-11-28 05:26:09,565 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [759834148] [2024-11-28 05:26:09,565 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [759834148] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-28 05:26:09,565 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-28 05:26:09,565 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-11-28 05:26:09,565 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1746312673] [2024-11-28 05:26:09,565 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-28 05:26:09,566 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-28 05:26:09,566 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FOX [2024-11-28 05:26:09,566 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-28 05:26:09,566 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-28 05:26:09,570 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 35 [2024-11-28 05:26:09,571 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 93 places, 82 transitions, 538 flow. Second operand has 3 states, 3 states have (on average 16.333333333333332) internal successors, (49), 3 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 05:26:09,571 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-28 05:26:09,571 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 35 [2024-11-28 05:26:09,571 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-28 05:26:09,820 INFO L124 PetriNetUnfolderBase]: 555/1131 cut-off events. [2024-11-28 05:26:09,820 INFO L125 PetriNetUnfolderBase]: For 1759/1908 co-relation queries the response was YES. [2024-11-28 05:26:09,825 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3700 conditions, 1131 events. 555/1131 cut-off events. For 1759/1908 co-relation queries the response was YES. Maximal size of possible extension queue 69. Compared 6195 event pairs, 167 based on Foata normal form. 4/1134 useless extension candidates. Maximal degree in co-relation 3636. Up to 637 conditions per place. [2024-11-28 05:26:09,830 INFO L140 encePairwiseOnDemand]: 31/35 looper letters, 92 selfloop transitions, 3 changer transitions 6/107 dead transitions. [2024-11-28 05:26:09,830 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 95 places, 107 transitions, 863 flow [2024-11-28 05:26:09,831 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-28 05:26:09,831 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-11-28 05:26:09,831 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 71 transitions. [2024-11-28 05:26:09,832 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.6761904761904762 [2024-11-28 05:26:09,832 INFO L175 Difference]: Start difference. First operand has 93 places, 82 transitions, 538 flow. Second operand 3 states and 71 transitions. [2024-11-28 05:26:09,832 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 95 places, 107 transitions, 863 flow [2024-11-28 05:26:09,840 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 92 places, 107 transitions, 844 flow, removed 3 selfloop flow, removed 3 redundant places. [2024-11-28 05:26:09,841 INFO L231 Difference]: Finished difference. Result has 93 places, 79 transitions, 502 flow [2024-11-28 05:26:09,842 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=35, PETRI_DIFFERENCE_MINUEND_FLOW=521, PETRI_DIFFERENCE_MINUEND_PLACES=90, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=82, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=79, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=502, PETRI_PLACES=93, PETRI_TRANSITIONS=79} [2024-11-28 05:26:09,842 INFO L279 CegarLoopForPetriNet]: 36 programPoint places, 57 predicate places. [2024-11-28 05:26:09,842 INFO L471 AbstractCegarLoop]: Abstraction has has 93 places, 79 transitions, 502 flow [2024-11-28 05:26:09,843 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 16.333333333333332) internal successors, (49), 3 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 05:26:09,843 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-28 05:26:09,843 INFO L206 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 05:26:09,853 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_30f617b7-f0b1-412a-b7a3-a0ccf9358712/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Ended with exit code 0 [2024-11-28 05:26:10,043 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_30f617b7-f0b1-412a-b7a3-a0ccf9358712/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 05:26:10,043 INFO L396 AbstractCegarLoop]: === Iteration 12 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 11 more)] === [2024-11-28 05:26:10,044 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 05:26:10,044 INFO L85 PathProgramCache]: Analyzing trace with hash -18805359, now seen corresponding path program 1 times [2024-11-28 05:26:10,044 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2024-11-28 05:26:10,044 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1336705665] [2024-11-28 05:26:10,044 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-28 05:26:10,044 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 05:26:10,044 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_30f617b7-f0b1-412a-b7a3-a0ccf9358712/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 05:26:10,046 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_30f617b7-f0b1-412a-b7a3-a0ccf9358712/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 05:26:10,048 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_30f617b7-f0b1-412a-b7a3-a0ccf9358712/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2024-11-28 05:26:10,108 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 05:26:10,110 INFO L256 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 10 conjuncts are in the unsatisfiable core [2024-11-28 05:26:10,111 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 05:26:10,268 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-28 05:26:10,268 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-28 05:26:10,440 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-28 05:26:10,441 INFO L136 FreeRefinementEngine]: Strategy FOX found an infeasible trace [2024-11-28 05:26:10,441 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1336705665] [2024-11-28 05:26:10,441 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1336705665] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-28 05:26:10,441 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-11-28 05:26:10,441 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 11 [2024-11-28 05:26:10,441 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [429964972] [2024-11-28 05:26:10,441 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-11-28 05:26:10,441 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-11-28 05:26:10,442 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FOX [2024-11-28 05:26:10,442 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-11-28 05:26:10,442 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=92, Unknown=0, NotChecked=0, Total=132 [2024-11-28 05:26:10,637 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 35 [2024-11-28 05:26:10,637 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 93 places, 79 transitions, 502 flow. Second operand has 12 states, 12 states have (on average 15.0) internal successors, (180), 12 states have internal predecessors, (180), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 05:26:10,637 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-28 05:26:10,637 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 35 [2024-11-28 05:26:10,637 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-28 05:26:11,203 INFO L124 PetriNetUnfolderBase]: 475/958 cut-off events. [2024-11-28 05:26:11,203 INFO L125 PetriNetUnfolderBase]: For 1580/1784 co-relation queries the response was YES. [2024-11-28 05:26:11,208 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3227 conditions, 958 events. 475/958 cut-off events. For 1580/1784 co-relation queries the response was YES. Maximal size of possible extension queue 65. Compared 5211 event pairs, 293 based on Foata normal form. 13/966 useless extension candidates. Maximal degree in co-relation 3171. Up to 580 conditions per place. [2024-11-28 05:26:11,213 INFO L140 encePairwiseOnDemand]: 27/35 looper letters, 65 selfloop transitions, 26 changer transitions 0/100 dead transitions. [2024-11-28 05:26:11,213 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 95 places, 100 transitions, 778 flow [2024-11-28 05:26:11,214 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-11-28 05:26:11,214 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-11-28 05:26:11,215 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 159 transitions. [2024-11-28 05:26:11,215 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.5678571428571428 [2024-11-28 05:26:11,215 INFO L175 Difference]: Start difference. First operand has 93 places, 79 transitions, 502 flow. Second operand 8 states and 159 transitions. [2024-11-28 05:26:11,215 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 95 places, 100 transitions, 778 flow [2024-11-28 05:26:11,222 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 88 places, 100 transitions, 717 flow, removed 14 selfloop flow, removed 7 redundant places. [2024-11-28 05:26:11,224 INFO L231 Difference]: Finished difference. Result has 89 places, 78 transitions, 511 flow [2024-11-28 05:26:11,224 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=35, PETRI_DIFFERENCE_MINUEND_FLOW=447, PETRI_DIFFERENCE_MINUEND_PLACES=81, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=77, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=25, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=51, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=511, PETRI_PLACES=89, PETRI_TRANSITIONS=78} [2024-11-28 05:26:11,225 INFO L279 CegarLoopForPetriNet]: 36 programPoint places, 53 predicate places. [2024-11-28 05:26:11,225 INFO L471 AbstractCegarLoop]: Abstraction has has 89 places, 78 transitions, 511 flow [2024-11-28 05:26:11,225 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 15.0) internal successors, (180), 12 states have internal predecessors, (180), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 05:26:11,225 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-28 05:26:11,225 INFO L206 CegarLoopForPetriNet]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1] [2024-11-28 05:26:11,235 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_30f617b7-f0b1-412a-b7a3-a0ccf9358712/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Ended with exit code 0 [2024-11-28 05:26:11,426 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_30f617b7-f0b1-412a-b7a3-a0ccf9358712/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 05:26:11,426 INFO L396 AbstractCegarLoop]: === Iteration 13 === Targeting thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 11 more)] === [2024-11-28 05:26:11,426 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 05:26:11,427 INFO L85 PathProgramCache]: Analyzing trace with hash -136653008, now seen corresponding path program 2 times [2024-11-28 05:26:11,427 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2024-11-28 05:26:11,427 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1158005228] [2024-11-28 05:26:11,427 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-28 05:26:11,427 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 05:26:11,427 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_30f617b7-f0b1-412a-b7a3-a0ccf9358712/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 05:26:11,429 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_30f617b7-f0b1-412a-b7a3-a0ccf9358712/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 05:26:11,430 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_30f617b7-f0b1-412a-b7a3-a0ccf9358712/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2024-11-28 05:26:11,488 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2024-11-28 05:26:11,488 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 05:26:11,489 INFO L256 TraceCheckSpWp]: Trace formula consists of 44 conjuncts, 13 conjuncts are in the unsatisfiable core [2024-11-28 05:26:11,490 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 05:26:11,505 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 8 treesize of output 7 [2024-11-28 05:26:11,780 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2024-11-28 05:26:11,780 INFO L308 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-28 05:26:11,780 INFO L136 FreeRefinementEngine]: Strategy FOX found an infeasible trace [2024-11-28 05:26:11,780 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1158005228] [2024-11-28 05:26:11,780 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1158005228] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-28 05:26:11,780 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-28 05:26:11,780 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-11-28 05:26:11,780 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [40085893] [2024-11-28 05:26:11,780 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-28 05:26:11,781 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-11-28 05:26:11,781 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FOX [2024-11-28 05:26:11,781 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-11-28 05:26:11,781 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2024-11-28 05:26:12,001 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 35 [2024-11-28 05:26:12,001 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 89 places, 78 transitions, 511 flow. Second operand has 6 states, 6 states have (on average 13.333333333333334) internal successors, (80), 6 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 05:26:12,001 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-28 05:26:12,001 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 35 [2024-11-28 05:26:12,001 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-28 05:26:12,414 INFO L124 PetriNetUnfolderBase]: 593/1192 cut-off events. [2024-11-28 05:26:12,414 INFO L125 PetriNetUnfolderBase]: For 1561/1638 co-relation queries the response was YES. [2024-11-28 05:26:12,419 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3779 conditions, 1192 events. 593/1192 cut-off events. For 1561/1638 co-relation queries the response was YES. Maximal size of possible extension queue 67. Compared 6696 event pairs, 239 based on Foata normal form. 38/1216 useless extension candidates. Maximal degree in co-relation 3725. Up to 584 conditions per place. [2024-11-28 05:26:12,426 INFO L140 encePairwiseOnDemand]: 27/35 looper letters, 85 selfloop transitions, 25 changer transitions 0/118 dead transitions. [2024-11-28 05:26:12,426 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 94 places, 118 transitions, 932 flow [2024-11-28 05:26:12,427 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-11-28 05:26:12,427 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-11-28 05:26:12,428 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 114 transitions. [2024-11-28 05:26:12,428 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.5428571428571428 [2024-11-28 05:26:12,428 INFO L175 Difference]: Start difference. First operand has 89 places, 78 transitions, 511 flow. Second operand 6 states and 114 transitions. [2024-11-28 05:26:12,428 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 94 places, 118 transitions, 932 flow [2024-11-28 05:26:12,434 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 88 places, 118 transitions, 858 flow, removed 6 selfloop flow, removed 6 redundant places. [2024-11-28 05:26:12,436 INFO L231 Difference]: Finished difference. Result has 90 places, 86 transitions, 584 flow [2024-11-28 05:26:12,437 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=35, PETRI_DIFFERENCE_MINUEND_FLOW=457, PETRI_DIFFERENCE_MINUEND_PLACES=83, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=78, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=17, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=53, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=584, PETRI_PLACES=90, PETRI_TRANSITIONS=86} [2024-11-28 05:26:12,438 INFO L279 CegarLoopForPetriNet]: 36 programPoint places, 54 predicate places. [2024-11-28 05:26:12,438 INFO L471 AbstractCegarLoop]: Abstraction has has 90 places, 86 transitions, 584 flow [2024-11-28 05:26:12,438 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 13.333333333333334) internal successors, (80), 6 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 05:26:12,438 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-28 05:26:12,438 INFO L206 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 05:26:12,451 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_30f617b7-f0b1-412a-b7a3-a0ccf9358712/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Ended with exit code 0 [2024-11-28 05:26:12,639 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_30f617b7-f0b1-412a-b7a3-a0ccf9358712/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 05:26:12,639 INFO L396 AbstractCegarLoop]: === Iteration 14 === Targeting thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 11 more)] === [2024-11-28 05:26:12,639 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 05:26:12,640 INFO L85 PathProgramCache]: Analyzing trace with hash -819086197, now seen corresponding path program 2 times [2024-11-28 05:26:12,640 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2024-11-28 05:26:12,640 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [514466491] [2024-11-28 05:26:12,640 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-28 05:26:12,640 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 05:26:12,640 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_30f617b7-f0b1-412a-b7a3-a0ccf9358712/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 05:26:12,643 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_30f617b7-f0b1-412a-b7a3-a0ccf9358712/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 05:26:12,644 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_30f617b7-f0b1-412a-b7a3-a0ccf9358712/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2024-11-28 05:26:12,720 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-28 05:26:12,720 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 05:26:12,723 INFO L256 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 17 conjuncts are in the unsatisfiable core [2024-11-28 05:26:12,726 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 05:26:12,737 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 8 treesize of output 7 [2024-11-28 05:26:13,212 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-28 05:26:13,213 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-28 05:26:13,951 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-28 05:26:13,952 INFO L136 FreeRefinementEngine]: Strategy FOX found an infeasible trace [2024-11-28 05:26:13,952 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [514466491] [2024-11-28 05:26:13,952 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [514466491] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-28 05:26:13,952 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-11-28 05:26:13,952 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 14 [2024-11-28 05:26:13,952 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [752749342] [2024-11-28 05:26:13,952 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-11-28 05:26:13,952 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2024-11-28 05:26:13,952 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FOX [2024-11-28 05:26:13,953 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2024-11-28 05:26:13,953 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=190, Unknown=0, NotChecked=0, Total=240 [2024-11-28 05:26:14,722 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 35 [2024-11-28 05:26:14,722 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 90 places, 86 transitions, 584 flow. Second operand has 16 states, 16 states have (on average 13.375) internal successors, (214), 16 states have internal predecessors, (214), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 05:26:14,723 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-28 05:26:14,723 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 35 [2024-11-28 05:26:14,723 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-28 05:26:17,667 INFO L124 PetriNetUnfolderBase]: 1013/2112 cut-off events. [2024-11-28 05:26:17,668 INFO L125 PetriNetUnfolderBase]: For 4820/5070 co-relation queries the response was YES. [2024-11-28 05:26:17,677 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7382 conditions, 2112 events. 1013/2112 cut-off events. For 4820/5070 co-relation queries the response was YES. Maximal size of possible extension queue 109. Compared 13878 event pairs, 381 based on Foata normal form. 46/2121 useless extension candidates. Maximal degree in co-relation 7327. Up to 484 conditions per place. [2024-11-28 05:26:17,689 INFO L140 encePairwiseOnDemand]: 26/35 looper letters, 152 selfloop transitions, 49 changer transitions 0/210 dead transitions. [2024-11-28 05:26:17,689 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 108 places, 210 transitions, 1629 flow [2024-11-28 05:26:17,690 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2024-11-28 05:26:17,691 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19 states. [2024-11-28 05:26:17,692 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 359 transitions. [2024-11-28 05:26:17,692 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.5398496240601504 [2024-11-28 05:26:17,692 INFO L175 Difference]: Start difference. First operand has 90 places, 86 transitions, 584 flow. Second operand 19 states and 359 transitions. [2024-11-28 05:26:17,692 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 108 places, 210 transitions, 1629 flow [2024-11-28 05:26:17,712 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 105 places, 210 transitions, 1586 flow, removed 3 selfloop flow, removed 3 redundant places. [2024-11-28 05:26:17,715 INFO L231 Difference]: Finished difference. Result has 110 places, 103 transitions, 813 flow [2024-11-28 05:26:17,715 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=35, PETRI_DIFFERENCE_MINUEND_FLOW=549, PETRI_DIFFERENCE_MINUEND_PLACES=87, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=86, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=33, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=48, PETRI_DIFFERENCE_SUBTRAHEND_STATES=19, PETRI_FLOW=813, PETRI_PLACES=110, PETRI_TRANSITIONS=103} [2024-11-28 05:26:17,716 INFO L279 CegarLoopForPetriNet]: 36 programPoint places, 74 predicate places. [2024-11-28 05:26:17,717 INFO L471 AbstractCegarLoop]: Abstraction has has 110 places, 103 transitions, 813 flow [2024-11-28 05:26:17,718 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 13.375) internal successors, (214), 16 states have internal predecessors, (214), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 05:26:17,718 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-28 05:26:17,718 INFO L206 CegarLoopForPetriNet]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 05:26:17,725 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_30f617b7-f0b1-412a-b7a3-a0ccf9358712/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Ended with exit code 0 [2024-11-28 05:26:17,918 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_30f617b7-f0b1-412a-b7a3-a0ccf9358712/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 05:26:17,919 INFO L396 AbstractCegarLoop]: === Iteration 15 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 11 more)] === [2024-11-28 05:26:17,919 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 05:26:17,919 INFO L85 PathProgramCache]: Analyzing trace with hash 1809857563, now seen corresponding path program 2 times [2024-11-28 05:26:17,919 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2024-11-28 05:26:17,919 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [871280769] [2024-11-28 05:26:17,919 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-28 05:26:17,919 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 05:26:17,920 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_30f617b7-f0b1-412a-b7a3-a0ccf9358712/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 05:26:17,921 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_30f617b7-f0b1-412a-b7a3-a0ccf9358712/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 05:26:17,922 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_30f617b7-f0b1-412a-b7a3-a0ccf9358712/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2024-11-28 05:26:17,981 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2024-11-28 05:26:17,982 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 05:26:17,983 INFO L256 TraceCheckSpWp]: Trace formula consists of 52 conjuncts, 13 conjuncts are in the unsatisfiable core [2024-11-28 05:26:17,984 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 05:26:17,999 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 8 treesize of output 7 [2024-11-28 05:26:18,243 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2024-11-28 05:26:18,243 INFO L308 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-28 05:26:18,243 INFO L136 FreeRefinementEngine]: Strategy FOX found an infeasible trace [2024-11-28 05:26:18,243 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [871280769] [2024-11-28 05:26:18,244 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [871280769] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-28 05:26:18,244 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-28 05:26:18,244 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-11-28 05:26:18,244 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1429075087] [2024-11-28 05:26:18,244 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-28 05:26:18,244 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-11-28 05:26:18,244 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FOX [2024-11-28 05:26:18,244 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-11-28 05:26:18,245 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2024-11-28 05:26:18,370 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 35 [2024-11-28 05:26:18,370 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 110 places, 103 transitions, 813 flow. Second operand has 6 states, 6 states have (on average 13.666666666666666) internal successors, (82), 6 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 05:26:18,370 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-28 05:26:18,370 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 35 [2024-11-28 05:26:18,370 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-28 05:26:19,059 INFO L124 PetriNetUnfolderBase]: 1542/2991 cut-off events. [2024-11-28 05:26:19,059 INFO L125 PetriNetUnfolderBase]: For 11462/11744 co-relation queries the response was YES. [2024-11-28 05:26:19,080 INFO L83 FinitePrefix]: Finished finitePrefix Result has 11764 conditions, 2991 events. 1542/2991 cut-off events. For 11462/11744 co-relation queries the response was YES. Maximal size of possible extension queue 130. Compared 19091 event pairs, 686 based on Foata normal form. 95/3030 useless extension candidates. Maximal degree in co-relation 11702. Up to 1614 conditions per place. [2024-11-28 05:26:19,100 INFO L140 encePairwiseOnDemand]: 27/35 looper letters, 142 selfloop transitions, 31 changer transitions 0/182 dead transitions. [2024-11-28 05:26:19,100 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 115 places, 182 transitions, 1844 flow [2024-11-28 05:26:19,101 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-11-28 05:26:19,101 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-11-28 05:26:19,102 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 112 transitions. [2024-11-28 05:26:19,102 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.5333333333333333 [2024-11-28 05:26:19,102 INFO L175 Difference]: Start difference. First operand has 110 places, 103 transitions, 813 flow. Second operand 6 states and 112 transitions. [2024-11-28 05:26:19,102 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 115 places, 182 transitions, 1844 flow [2024-11-28 05:26:19,139 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 108 places, 182 transitions, 1772 flow, removed 27 selfloop flow, removed 7 redundant places. [2024-11-28 05:26:19,141 INFO L231 Difference]: Finished difference. Result has 110 places, 117 transitions, 995 flow [2024-11-28 05:26:19,142 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=35, PETRI_DIFFERENCE_MINUEND_FLOW=777, PETRI_DIFFERENCE_MINUEND_PLACES=103, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=103, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=17, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=72, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=995, PETRI_PLACES=110, PETRI_TRANSITIONS=117} [2024-11-28 05:26:19,142 INFO L279 CegarLoopForPetriNet]: 36 programPoint places, 74 predicate places. [2024-11-28 05:26:19,144 INFO L471 AbstractCegarLoop]: Abstraction has has 110 places, 117 transitions, 995 flow [2024-11-28 05:26:19,144 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 13.666666666666666) internal successors, (82), 6 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 05:26:19,145 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-28 05:26:19,145 INFO L206 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 05:26:19,154 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_30f617b7-f0b1-412a-b7a3-a0ccf9358712/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Ended with exit code 0 [2024-11-28 05:26:19,345 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_30f617b7-f0b1-412a-b7a3-a0ccf9358712/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 05:26:19,345 INFO L396 AbstractCegarLoop]: === Iteration 16 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 11 more)] === [2024-11-28 05:26:19,346 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 05:26:19,346 INFO L85 PathProgramCache]: Analyzing trace with hash -373657482, now seen corresponding path program 2 times [2024-11-28 05:26:19,346 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2024-11-28 05:26:19,346 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [167216079] [2024-11-28 05:26:19,346 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-28 05:26:19,346 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 05:26:19,346 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_30f617b7-f0b1-412a-b7a3-a0ccf9358712/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 05:26:19,348 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_30f617b7-f0b1-412a-b7a3-a0ccf9358712/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 05:26:19,351 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_30f617b7-f0b1-412a-b7a3-a0ccf9358712/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2024-11-28 05:26:19,421 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-28 05:26:19,421 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 05:26:19,424 INFO L256 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 14 conjuncts are in the unsatisfiable core [2024-11-28 05:26:19,425 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 05:26:19,434 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 8 treesize of output 7 [2024-11-28 05:26:19,797 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-28 05:26:19,798 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-28 05:26:20,294 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 3 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-28 05:26:20,294 INFO L136 FreeRefinementEngine]: Strategy FOX found an infeasible trace [2024-11-28 05:26:20,294 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [167216079] [2024-11-28 05:26:20,294 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [167216079] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-28 05:26:20,294 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-11-28 05:26:20,294 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 12 [2024-11-28 05:26:20,294 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1146339733] [2024-11-28 05:26:20,294 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-11-28 05:26:20,295 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2024-11-28 05:26:20,295 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FOX [2024-11-28 05:26:20,295 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2024-11-28 05:26:20,295 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=141, Unknown=0, NotChecked=0, Total=182 [2024-11-28 05:26:21,233 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 35 [2024-11-28 05:26:21,233 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 110 places, 117 transitions, 995 flow. Second operand has 14 states, 14 states have (on average 13.857142857142858) internal successors, (194), 14 states have internal predecessors, (194), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 05:26:21,234 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-28 05:26:21,234 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 35 [2024-11-28 05:26:21,234 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-28 05:26:22,834 INFO L124 PetriNetUnfolderBase]: 1741/3508 cut-off events. [2024-11-28 05:26:22,834 INFO L125 PetriNetUnfolderBase]: For 15847/16301 co-relation queries the response was YES. [2024-11-28 05:26:22,850 INFO L83 FinitePrefix]: Finished finitePrefix Result has 14912 conditions, 3508 events. 1741/3508 cut-off events. For 15847/16301 co-relation queries the response was YES. Maximal size of possible extension queue 143. Compared 23559 event pairs, 584 based on Foata normal form. 94/3511 useless extension candidates. Maximal degree in co-relation 14848. Up to 1188 conditions per place. [2024-11-28 05:26:22,869 INFO L140 encePairwiseOnDemand]: 26/35 looper letters, 191 selfloop transitions, 32 changer transitions 0/233 dead transitions. [2024-11-28 05:26:22,869 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 120 places, 233 transitions, 2436 flow [2024-11-28 05:26:22,870 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-11-28 05:26:22,871 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-11-28 05:26:22,871 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 204 transitions. [2024-11-28 05:26:22,872 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.5298701298701298 [2024-11-28 05:26:22,872 INFO L175 Difference]: Start difference. First operand has 110 places, 117 transitions, 995 flow. Second operand 11 states and 204 transitions. [2024-11-28 05:26:22,872 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 120 places, 233 transitions, 2436 flow [2024-11-28 05:26:22,913 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 117 places, 233 transitions, 2401 flow, removed 2 selfloop flow, removed 3 redundant places. [2024-11-28 05:26:22,916 INFO L231 Difference]: Finished difference. Result has 119 places, 124 transitions, 1118 flow [2024-11-28 05:26:22,917 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=35, PETRI_DIFFERENCE_MINUEND_FLOW=960, PETRI_DIFFERENCE_MINUEND_PLACES=107, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=117, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=25, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=87, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=1118, PETRI_PLACES=119, PETRI_TRANSITIONS=124} [2024-11-28 05:26:22,917 INFO L279 CegarLoopForPetriNet]: 36 programPoint places, 83 predicate places. [2024-11-28 05:26:22,917 INFO L471 AbstractCegarLoop]: Abstraction has has 119 places, 124 transitions, 1118 flow [2024-11-28 05:26:22,918 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 13.857142857142858) internal successors, (194), 14 states have internal predecessors, (194), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 05:26:22,918 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-28 05:26:22,918 INFO L206 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1] [2024-11-28 05:26:22,928 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_30f617b7-f0b1-412a-b7a3-a0ccf9358712/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Ended with exit code 0 [2024-11-28 05:26:23,118 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_30f617b7-f0b1-412a-b7a3-a0ccf9358712/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 05:26:23,119 INFO L396 AbstractCegarLoop]: === Iteration 17 === Targeting thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 11 more)] === [2024-11-28 05:26:23,119 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 05:26:23,119 INFO L85 PathProgramCache]: Analyzing trace with hash -764535568, now seen corresponding path program 3 times [2024-11-28 05:26:23,119 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2024-11-28 05:26:23,119 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2128661532] [2024-11-28 05:26:23,119 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-28 05:26:23,119 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 05:26:23,120 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_30f617b7-f0b1-412a-b7a3-a0ccf9358712/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 05:26:23,121 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_30f617b7-f0b1-412a-b7a3-a0ccf9358712/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 05:26:23,124 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_30f617b7-f0b1-412a-b7a3-a0ccf9358712/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2024-11-28 05:26:23,219 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2024-11-28 05:26:23,219 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 05:26:23,222 INFO L256 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 13 conjuncts are in the unsatisfiable core [2024-11-28 05:26:23,223 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 05:26:23,446 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 2 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-28 05:26:23,446 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-28 05:26:23,776 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 2 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-28 05:26:23,777 INFO L136 FreeRefinementEngine]: Strategy FOX found an infeasible trace [2024-11-28 05:26:23,777 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2128661532] [2024-11-28 05:26:23,777 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2128661532] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-28 05:26:23,777 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-11-28 05:26:23,777 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 17 [2024-11-28 05:26:23,777 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1584661851] [2024-11-28 05:26:23,777 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-11-28 05:26:23,777 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2024-11-28 05:26:23,778 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FOX [2024-11-28 05:26:23,778 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2024-11-28 05:26:23,778 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=227, Unknown=0, NotChecked=0, Total=306 [2024-11-28 05:26:24,103 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 35 [2024-11-28 05:26:24,104 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 119 places, 124 transitions, 1118 flow. Second operand has 18 states, 18 states have (on average 14.666666666666666) internal successors, (264), 18 states have internal predecessors, (264), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 05:26:24,104 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-28 05:26:24,104 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 35 [2024-11-28 05:26:24,104 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-28 05:26:25,582 INFO L124 PetriNetUnfolderBase]: 1789/3493 cut-off events. [2024-11-28 05:26:25,582 INFO L125 PetriNetUnfolderBase]: For 17870/18161 co-relation queries the response was YES. [2024-11-28 05:26:25,592 INFO L83 FinitePrefix]: Finished finitePrefix Result has 15922 conditions, 3493 events. 1789/3493 cut-off events. For 17870/18161 co-relation queries the response was YES. Maximal size of possible extension queue 137. Compared 22774 event pairs, 943 based on Foata normal form. 86/3488 useless extension candidates. Maximal degree in co-relation 15856. Up to 1982 conditions per place. [2024-11-28 05:26:25,608 INFO L140 encePairwiseOnDemand]: 27/35 looper letters, 168 selfloop transitions, 31 changer transitions 0/209 dead transitions. [2024-11-28 05:26:25,609 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 131 places, 209 transitions, 2138 flow [2024-11-28 05:26:25,610 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2024-11-28 05:26:25,610 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2024-11-28 05:26:25,611 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 284 transitions. [2024-11-28 05:26:25,611 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.5795918367346938 [2024-11-28 05:26:25,611 INFO L175 Difference]: Start difference. First operand has 119 places, 124 transitions, 1118 flow. Second operand 14 states and 284 transitions. [2024-11-28 05:26:25,611 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 131 places, 209 transitions, 2138 flow [2024-11-28 05:26:25,667 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 127 places, 209 transitions, 2074 flow, removed 27 selfloop flow, removed 4 redundant places. [2024-11-28 05:26:25,670 INFO L231 Difference]: Finished difference. Result has 128 places, 120 transitions, 1122 flow [2024-11-28 05:26:25,670 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=35, PETRI_DIFFERENCE_MINUEND_FLOW=1038, PETRI_DIFFERENCE_MINUEND_PLACES=114, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=119, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=30, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=88, PETRI_DIFFERENCE_SUBTRAHEND_STATES=14, PETRI_FLOW=1122, PETRI_PLACES=128, PETRI_TRANSITIONS=120} [2024-11-28 05:26:25,671 INFO L279 CegarLoopForPetriNet]: 36 programPoint places, 92 predicate places. [2024-11-28 05:26:25,671 INFO L471 AbstractCegarLoop]: Abstraction has has 128 places, 120 transitions, 1122 flow [2024-11-28 05:26:25,671 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 14.666666666666666) internal successors, (264), 18 states have internal predecessors, (264), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 05:26:25,672 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-28 05:26:25,672 INFO L206 CegarLoopForPetriNet]: trace histogram [3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1] [2024-11-28 05:26:25,682 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_30f617b7-f0b1-412a-b7a3-a0ccf9358712/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Ended with exit code 0 [2024-11-28 05:26:25,872 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_30f617b7-f0b1-412a-b7a3-a0ccf9358712/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 05:26:25,872 INFO L396 AbstractCegarLoop]: === Iteration 18 === Targeting thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 11 more)] === [2024-11-28 05:26:25,873 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 05:26:25,873 INFO L85 PathProgramCache]: Analyzing trace with hash 442598741, now seen corresponding path program 4 times [2024-11-28 05:26:25,873 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2024-11-28 05:26:25,873 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [82913385] [2024-11-28 05:26:25,873 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-11-28 05:26:25,873 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 05:26:25,873 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_30f617b7-f0b1-412a-b7a3-a0ccf9358712/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 05:26:25,879 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_30f617b7-f0b1-412a-b7a3-a0ccf9358712/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 05:26:25,881 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_30f617b7-f0b1-412a-b7a3-a0ccf9358712/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2024-11-28 05:26:26,006 INFO L229 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-11-28 05:26:26,006 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 05:26:26,009 INFO L256 TraceCheckSpWp]: Trace formula consists of 93 conjuncts, 20 conjuncts are in the unsatisfiable core [2024-11-28 05:26:26,010 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 05:26:26,020 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 8 treesize of output 7 [2024-11-28 05:26:26,640 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 17 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-28 05:26:26,640 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-28 05:26:28,189 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 17 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-28 05:26:28,189 INFO L136 FreeRefinementEngine]: Strategy FOX found an infeasible trace [2024-11-28 05:26:28,189 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [82913385] [2024-11-28 05:26:28,189 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [82913385] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-28 05:26:28,189 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-11-28 05:26:28,189 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10] total 19 [2024-11-28 05:26:28,189 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1360513475] [2024-11-28 05:26:28,189 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-11-28 05:26:28,190 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2024-11-28 05:26:28,190 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FOX [2024-11-28 05:26:28,190 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2024-11-28 05:26:28,191 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=342, Unknown=0, NotChecked=0, Total=420 [2024-11-28 05:26:30,099 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 35 [2024-11-28 05:26:30,100 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 128 places, 120 transitions, 1122 flow. Second operand has 21 states, 21 states have (on average 13.428571428571429) internal successors, (282), 21 states have internal predecessors, (282), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 05:26:30,100 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-28 05:26:30,100 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 35 [2024-11-28 05:26:30,100 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-28 05:26:35,846 INFO L124 PetriNetUnfolderBase]: 2766/5465 cut-off events. [2024-11-28 05:26:35,846 INFO L125 PetriNetUnfolderBase]: For 33227/33816 co-relation queries the response was YES. [2024-11-28 05:26:35,863 INFO L83 FinitePrefix]: Finished finitePrefix Result has 25064 conditions, 5465 events. 2766/5465 cut-off events. For 33227/33816 co-relation queries the response was YES. Maximal size of possible extension queue 171. Compared 37700 event pairs, 753 based on Foata normal form. 154/5453 useless extension candidates. Maximal degree in co-relation 24995. Up to 1285 conditions per place. [2024-11-28 05:26:35,886 INFO L140 encePairwiseOnDemand]: 26/35 looper letters, 295 selfloop transitions, 82 changer transitions 0/387 dead transitions. [2024-11-28 05:26:35,886 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 153 places, 387 transitions, 4121 flow [2024-11-28 05:26:35,887 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2024-11-28 05:26:35,887 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2024-11-28 05:26:35,888 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 509 transitions. [2024-11-28 05:26:35,889 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.5593406593406594 [2024-11-28 05:26:35,889 INFO L175 Difference]: Start difference. First operand has 128 places, 120 transitions, 1122 flow. Second operand 26 states and 509 transitions. [2024-11-28 05:26:35,889 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 153 places, 387 transitions, 4121 flow [2024-11-28 05:26:35,987 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 140 places, 387 transitions, 4030 flow, removed 6 selfloop flow, removed 13 redundant places. [2024-11-28 05:26:35,991 INFO L231 Difference]: Finished difference. Result has 149 places, 156 transitions, 1740 flow [2024-11-28 05:26:35,991 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=35, PETRI_DIFFERENCE_MINUEND_FLOW=1031, PETRI_DIFFERENCE_MINUEND_PLACES=115, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=120, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=51, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=60, PETRI_DIFFERENCE_SUBTRAHEND_STATES=26, PETRI_FLOW=1740, PETRI_PLACES=149, PETRI_TRANSITIONS=156} [2024-11-28 05:26:35,992 INFO L279 CegarLoopForPetriNet]: 36 programPoint places, 113 predicate places. [2024-11-28 05:26:35,992 INFO L471 AbstractCegarLoop]: Abstraction has has 149 places, 156 transitions, 1740 flow [2024-11-28 05:26:35,992 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 13.428571428571429) internal successors, (282), 21 states have internal predecessors, (282), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 05:26:35,992 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-28 05:26:35,992 INFO L206 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 05:26:36,002 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_30f617b7-f0b1-412a-b7a3-a0ccf9358712/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Ended with exit code 0 [2024-11-28 05:26:36,193 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_30f617b7-f0b1-412a-b7a3-a0ccf9358712/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 05:26:36,193 INFO L396 AbstractCegarLoop]: === Iteration 19 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 11 more)] === [2024-11-28 05:26:36,194 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 05:26:36,194 INFO L85 PathProgramCache]: Analyzing trace with hash -1369660069, now seen corresponding path program 3 times [2024-11-28 05:26:36,194 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2024-11-28 05:26:36,194 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [792150119] [2024-11-28 05:26:36,194 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-28 05:26:36,194 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 05:26:36,194 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_30f617b7-f0b1-412a-b7a3-a0ccf9358712/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 05:26:36,199 INFO L229 MonitoredProcess]: Starting monitored process 20 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_30f617b7-f0b1-412a-b7a3-a0ccf9358712/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 05:26:36,200 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_30f617b7-f0b1-412a-b7a3-a0ccf9358712/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2024-11-28 05:26:36,294 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2024-11-28 05:26:36,294 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 05:26:36,297 INFO L256 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 13 conjuncts are in the unsatisfiable core [2024-11-28 05:26:36,298 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 05:26:36,521 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 2 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-28 05:26:36,521 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-28 05:26:36,830 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 2 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-28 05:26:36,830 INFO L136 FreeRefinementEngine]: Strategy FOX found an infeasible trace [2024-11-28 05:26:36,830 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [792150119] [2024-11-28 05:26:36,830 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [792150119] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-28 05:26:36,830 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-11-28 05:26:36,830 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 17 [2024-11-28 05:26:36,830 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [303501490] [2024-11-28 05:26:36,830 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-11-28 05:26:36,831 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2024-11-28 05:26:36,831 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FOX [2024-11-28 05:26:36,831 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2024-11-28 05:26:36,831 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=227, Unknown=0, NotChecked=0, Total=306 [2024-11-28 05:26:37,202 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 35 [2024-11-28 05:26:37,203 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 149 places, 156 transitions, 1740 flow. Second operand has 18 states, 18 states have (on average 14.88888888888889) internal successors, (268), 18 states have internal predecessors, (268), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 05:26:37,203 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-28 05:26:37,203 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 35 [2024-11-28 05:26:37,203 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-28 05:26:38,882 INFO L124 PetriNetUnfolderBase]: 2940/5615 cut-off events. [2024-11-28 05:26:38,882 INFO L125 PetriNetUnfolderBase]: For 46779/47319 co-relation queries the response was YES. [2024-11-28 05:26:38,906 INFO L83 FinitePrefix]: Finished finitePrefix Result has 28600 conditions, 5615 events. 2940/5615 cut-off events. For 46779/47319 co-relation queries the response was YES. Maximal size of possible extension queue 165. Compared 37140 event pairs, 1747 based on Foata normal form. 57/5524 useless extension candidates. Maximal degree in co-relation 28523. Up to 3733 conditions per place. [2024-11-28 05:26:39,013 INFO L140 encePairwiseOnDemand]: 27/35 looper letters, 179 selfloop transitions, 31 changer transitions 0/221 dead transitions. [2024-11-28 05:26:39,013 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 162 places, 221 transitions, 2630 flow [2024-11-28 05:26:39,014 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2024-11-28 05:26:39,014 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2024-11-28 05:26:39,015 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 279 transitions. [2024-11-28 05:26:39,015 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.5693877551020409 [2024-11-28 05:26:39,015 INFO L175 Difference]: Start difference. First operand has 149 places, 156 transitions, 1740 flow. Second operand 14 states and 279 transitions. [2024-11-28 05:26:39,015 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 162 places, 221 transitions, 2630 flow [2024-11-28 05:26:39,217 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 154 places, 221 transitions, 2554 flow, removed 27 selfloop flow, removed 8 redundant places. [2024-11-28 05:26:39,220 INFO L231 Difference]: Finished difference. Result has 158 places, 160 transitions, 1792 flow [2024-11-28 05:26:39,220 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=35, PETRI_DIFFERENCE_MINUEND_FLOW=1664, PETRI_DIFFERENCE_MINUEND_PLACES=141, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=156, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=27, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=125, PETRI_DIFFERENCE_SUBTRAHEND_STATES=14, PETRI_FLOW=1792, PETRI_PLACES=158, PETRI_TRANSITIONS=160} [2024-11-28 05:26:39,221 INFO L279 CegarLoopForPetriNet]: 36 programPoint places, 122 predicate places. [2024-11-28 05:26:39,221 INFO L471 AbstractCegarLoop]: Abstraction has has 158 places, 160 transitions, 1792 flow [2024-11-28 05:26:39,221 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 14.88888888888889) internal successors, (268), 18 states have internal predecessors, (268), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 05:26:39,221 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-28 05:26:39,221 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 05:26:39,231 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_30f617b7-f0b1-412a-b7a3-a0ccf9358712/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Forceful destruction successful, exit code 0 [2024-11-28 05:26:39,422 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_30f617b7-f0b1-412a-b7a3-a0ccf9358712/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 05:26:39,422 INFO L396 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 11 more)] === [2024-11-28 05:26:39,424 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 05:26:39,424 INFO L85 PathProgramCache]: Analyzing trace with hash 824600896, now seen corresponding path program 1 times [2024-11-28 05:26:39,424 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2024-11-28 05:26:39,424 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2107738850] [2024-11-28 05:26:39,424 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-28 05:26:39,424 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 05:26:39,425 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_30f617b7-f0b1-412a-b7a3-a0ccf9358712/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 05:26:39,427 INFO L229 MonitoredProcess]: Starting monitored process 21 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_30f617b7-f0b1-412a-b7a3-a0ccf9358712/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 05:26:39,430 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_30f617b7-f0b1-412a-b7a3-a0ccf9358712/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2024-11-28 05:26:39,507 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 05:26:39,510 INFO L256 TraceCheckSpWp]: Trace formula consists of 87 conjuncts, 8 conjuncts are in the unsatisfiable core [2024-11-28 05:26:39,511 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 05:26:39,562 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-28 05:26:39,562 INFO L308 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-28 05:26:39,562 INFO L136 FreeRefinementEngine]: Strategy FOX found an infeasible trace [2024-11-28 05:26:39,562 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2107738850] [2024-11-28 05:26:39,562 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2107738850] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-28 05:26:39,562 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-28 05:26:39,562 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-11-28 05:26:39,562 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [240301846] [2024-11-28 05:26:39,562 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-28 05:26:39,563 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-11-28 05:26:39,563 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FOX [2024-11-28 05:26:39,563 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-11-28 05:26:39,563 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2024-11-28 05:26:39,593 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 35 [2024-11-28 05:26:39,593 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 158 places, 160 transitions, 1792 flow. Second operand has 6 states, 6 states have (on average 16.0) internal successors, (96), 6 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 05:26:39,593 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-28 05:26:39,593 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 35 [2024-11-28 05:26:39,593 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-28 05:26:40,529 INFO L124 PetriNetUnfolderBase]: 3002/5865 cut-off events. [2024-11-28 05:26:40,529 INFO L125 PetriNetUnfolderBase]: For 45170/45543 co-relation queries the response was YES. [2024-11-28 05:26:40,550 INFO L83 FinitePrefix]: Finished finitePrefix Result has 29652 conditions, 5865 events. 3002/5865 cut-off events. For 45170/45543 co-relation queries the response was YES. Maximal size of possible extension queue 173. Compared 39806 event pairs, 1229 based on Foata normal form. 17/5769 useless extension candidates. Maximal degree in co-relation 29569. Up to 3100 conditions per place. [2024-11-28 05:26:40,572 INFO L140 encePairwiseOnDemand]: 28/35 looper letters, 186 selfloop transitions, 18 changer transitions 13/228 dead transitions. [2024-11-28 05:26:40,572 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 163 places, 228 transitions, 2824 flow [2024-11-28 05:26:40,572 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-11-28 05:26:40,572 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-11-28 05:26:40,573 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 124 transitions. [2024-11-28 05:26:40,573 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.5904761904761905 [2024-11-28 05:26:40,573 INFO L175 Difference]: Start difference. First operand has 158 places, 160 transitions, 1792 flow. Second operand 6 states and 124 transitions. [2024-11-28 05:26:40,573 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 163 places, 228 transitions, 2824 flow [2024-11-28 05:26:40,701 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 154 places, 228 transitions, 2733 flow, removed 10 selfloop flow, removed 9 redundant places. [2024-11-28 05:26:40,704 INFO L231 Difference]: Finished difference. Result has 156 places, 160 transitions, 1784 flow [2024-11-28 05:26:40,705 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=35, PETRI_DIFFERENCE_MINUEND_FLOW=1729, PETRI_DIFFERENCE_MINUEND_PLACES=149, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=160, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=18, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=142, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=1784, PETRI_PLACES=156, PETRI_TRANSITIONS=160} [2024-11-28 05:26:40,705 INFO L279 CegarLoopForPetriNet]: 36 programPoint places, 120 predicate places. [2024-11-28 05:26:40,705 INFO L471 AbstractCegarLoop]: Abstraction has has 156 places, 160 transitions, 1784 flow [2024-11-28 05:26:40,705 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 16.0) internal successors, (96), 6 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 05:26:40,706 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-28 05:26:40,706 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 05:26:40,716 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_30f617b7-f0b1-412a-b7a3-a0ccf9358712/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Ended with exit code 0 [2024-11-28 05:26:40,906 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_30f617b7-f0b1-412a-b7a3-a0ccf9358712/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 05:26:40,906 INFO L396 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 11 more)] === [2024-11-28 05:26:40,907 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 05:26:40,907 INFO L85 PathProgramCache]: Analyzing trace with hash 56187576, now seen corresponding path program 2 times [2024-11-28 05:26:40,907 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2024-11-28 05:26:40,907 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [619357422] [2024-11-28 05:26:40,907 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-28 05:26:40,907 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 05:26:40,907 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_30f617b7-f0b1-412a-b7a3-a0ccf9358712/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 05:26:40,909 INFO L229 MonitoredProcess]: Starting monitored process 22 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_30f617b7-f0b1-412a-b7a3-a0ccf9358712/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 05:26:40,910 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_30f617b7-f0b1-412a-b7a3-a0ccf9358712/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2024-11-28 05:26:40,974 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2024-11-28 05:26:40,974 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 05:26:40,976 INFO L256 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 8 conjuncts are in the unsatisfiable core [2024-11-28 05:26:40,977 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 05:26:41,048 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-28 05:26:41,048 INFO L308 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-28 05:26:41,048 INFO L136 FreeRefinementEngine]: Strategy FOX found an infeasible trace [2024-11-28 05:26:41,048 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [619357422] [2024-11-28 05:26:41,048 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [619357422] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-28 05:26:41,048 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-28 05:26:41,048 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-11-28 05:26:41,049 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1003031918] [2024-11-28 05:26:41,049 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-28 05:26:41,049 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-11-28 05:26:41,049 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FOX [2024-11-28 05:26:41,049 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-11-28 05:26:41,049 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2024-11-28 05:26:41,075 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 35 [2024-11-28 05:26:41,075 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 156 places, 160 transitions, 1784 flow. Second operand has 6 states, 6 states have (on average 16.0) internal successors, (96), 6 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 05:26:41,075 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-28 05:26:41,075 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 35 [2024-11-28 05:26:41,075 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-28 05:26:42,324 INFO L124 PetriNetUnfolderBase]: 3344/6599 cut-off events. [2024-11-28 05:26:42,325 INFO L125 PetriNetUnfolderBase]: For 57179/58704 co-relation queries the response was YES. [2024-11-28 05:26:42,483 INFO L83 FinitePrefix]: Finished finitePrefix Result has 33550 conditions, 6599 events. 3344/6599 cut-off events. For 57179/58704 co-relation queries the response was YES. Maximal size of possible extension queue 209. Compared 47863 event pairs, 428 based on Foata normal form. 110/6546 useless extension candidates. Maximal degree in co-relation 33467. Up to 2470 conditions per place. [2024-11-28 05:26:42,498 INFO L140 encePairwiseOnDemand]: 27/35 looper letters, 327 selfloop transitions, 42 changer transitions 5/385 dead transitions. [2024-11-28 05:26:42,499 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 162 places, 385 transitions, 5276 flow [2024-11-28 05:26:42,499 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-11-28 05:26:42,499 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-11-28 05:26:42,499 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 162 transitions. [2024-11-28 05:26:42,500 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.5785714285714286 [2024-11-28 05:26:42,500 INFO L175 Difference]: Start difference. First operand has 156 places, 160 transitions, 1784 flow. Second operand 8 states and 162 transitions. [2024-11-28 05:26:42,500 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 162 places, 385 transitions, 5276 flow [2024-11-28 05:26:42,591 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 158 places, 385 transitions, 5131 flow, removed 4 selfloop flow, removed 4 redundant places. [2024-11-28 05:26:42,594 INFO L231 Difference]: Finished difference. Result has 163 places, 189 transitions, 2305 flow [2024-11-28 05:26:42,595 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=35, PETRI_DIFFERENCE_MINUEND_FLOW=1745, PETRI_DIFFERENCE_MINUEND_PLACES=151, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=160, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=13, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=134, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=2305, PETRI_PLACES=163, PETRI_TRANSITIONS=189} [2024-11-28 05:26:42,595 INFO L279 CegarLoopForPetriNet]: 36 programPoint places, 127 predicate places. [2024-11-28 05:26:42,595 INFO L471 AbstractCegarLoop]: Abstraction has has 163 places, 189 transitions, 2305 flow [2024-11-28 05:26:42,595 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 16.0) internal successors, (96), 6 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 05:26:42,595 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-28 05:26:42,595 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 05:26:42,601 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_30f617b7-f0b1-412a-b7a3-a0ccf9358712/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Ended with exit code 0 [2024-11-28 05:26:42,795 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_30f617b7-f0b1-412a-b7a3-a0ccf9358712/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 05:26:42,796 INFO L396 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 11 more)] === [2024-11-28 05:26:42,796 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 05:26:42,796 INFO L85 PathProgramCache]: Analyzing trace with hash 1639250242, now seen corresponding path program 1 times [2024-11-28 05:26:42,796 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2024-11-28 05:26:42,796 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [548992774] [2024-11-28 05:26:42,796 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-28 05:26:42,797 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 05:26:42,797 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_30f617b7-f0b1-412a-b7a3-a0ccf9358712/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 05:26:42,798 INFO L229 MonitoredProcess]: Starting monitored process 23 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_30f617b7-f0b1-412a-b7a3-a0ccf9358712/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 05:26:42,799 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_30f617b7-f0b1-412a-b7a3-a0ccf9358712/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2024-11-28 05:26:42,866 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 05:26:42,868 INFO L256 TraceCheckSpWp]: Trace formula consists of 87 conjuncts, 8 conjuncts are in the unsatisfiable core [2024-11-28 05:26:42,869 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 05:26:42,933 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-28 05:26:42,933 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-28 05:26:42,992 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-28 05:26:42,992 INFO L136 FreeRefinementEngine]: Strategy FOX found an infeasible trace [2024-11-28 05:26:42,993 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [548992774] [2024-11-28 05:26:42,993 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [548992774] provided 1 perfect and 1 imperfect interpolant sequences [2024-11-28 05:26:42,993 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-11-28 05:26:42,993 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [5] total 9 [2024-11-28 05:26:42,993 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1781692820] [2024-11-28 05:26:42,993 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-28 05:26:42,993 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-11-28 05:26:42,993 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FOX [2024-11-28 05:26:42,994 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-11-28 05:26:42,994 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2024-11-28 05:26:43,021 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 35 [2024-11-28 05:26:43,022 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 163 places, 189 transitions, 2305 flow. Second operand has 5 states, 5 states have (on average 15.6) internal successors, (78), 5 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) [2024-11-28 05:26:43,022 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-28 05:26:43,022 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 35 [2024-11-28 05:26:43,022 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-28 05:26:44,305 INFO L124 PetriNetUnfolderBase]: 4182/8032 cut-off events. [2024-11-28 05:26:44,306 INFO L125 PetriNetUnfolderBase]: For 68388/68412 co-relation queries the response was YES. [2024-11-28 05:26:44,345 INFO L83 FinitePrefix]: Finished finitePrefix Result has 42405 conditions, 8032 events. 4182/8032 cut-off events. For 68388/68412 co-relation queries the response was YES. Maximal size of possible extension queue 222. Compared 56682 event pairs, 375 based on Foata normal form. 113/8061 useless extension candidates. Maximal degree in co-relation 42318. Up to 3070 conditions per place. [2024-11-28 05:26:44,369 INFO L140 encePairwiseOnDemand]: 28/35 looper letters, 243 selfloop transitions, 83 changer transitions 0/335 dead transitions. [2024-11-28 05:26:44,369 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 169 places, 335 transitions, 4673 flow [2024-11-28 05:26:44,370 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-11-28 05:26:44,370 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-11-28 05:26:44,370 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 140 transitions. [2024-11-28 05:26:44,371 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.5714285714285714 [2024-11-28 05:26:44,371 INFO L175 Difference]: Start difference. First operand has 163 places, 189 transitions, 2305 flow. Second operand 7 states and 140 transitions. [2024-11-28 05:26:44,371 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 169 places, 335 transitions, 4673 flow [2024-11-28 05:26:44,551 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 166 places, 335 transitions, 4595 flow, removed 4 selfloop flow, removed 3 redundant places. [2024-11-28 05:26:44,554 INFO L231 Difference]: Finished difference. Result has 170 places, 234 transitions, 3133 flow [2024-11-28 05:26:44,554 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=35, PETRI_DIFFERENCE_MINUEND_FLOW=2266, PETRI_DIFFERENCE_MINUEND_PLACES=160, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=189, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=39, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=144, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=3133, PETRI_PLACES=170, PETRI_TRANSITIONS=234} [2024-11-28 05:26:44,555 INFO L279 CegarLoopForPetriNet]: 36 programPoint places, 134 predicate places. [2024-11-28 05:26:44,555 INFO L471 AbstractCegarLoop]: Abstraction has has 170 places, 234 transitions, 3133 flow [2024-11-28 05:26:44,555 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 15.6) internal successors, (78), 5 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) [2024-11-28 05:26:44,555 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-28 05:26:44,555 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 05:26:44,561 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_30f617b7-f0b1-412a-b7a3-a0ccf9358712/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Ended with exit code 0 [2024-11-28 05:26:44,755 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 23 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_30f617b7-f0b1-412a-b7a3-a0ccf9358712/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 05:26:44,756 INFO L396 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 11 more)] === [2024-11-28 05:26:44,756 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 05:26:44,756 INFO L85 PathProgramCache]: Analyzing trace with hash 1618936556, now seen corresponding path program 3 times [2024-11-28 05:26:44,756 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2024-11-28 05:26:44,756 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [425962433] [2024-11-28 05:26:44,756 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-28 05:26:44,756 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 05:26:44,757 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_30f617b7-f0b1-412a-b7a3-a0ccf9358712/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 05:26:44,760 INFO L229 MonitoredProcess]: Starting monitored process 24 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_30f617b7-f0b1-412a-b7a3-a0ccf9358712/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 05:26:44,761 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_30f617b7-f0b1-412a-b7a3-a0ccf9358712/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Waiting until timeout for monitored process [2024-11-28 05:26:44,831 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2024-11-28 05:26:44,831 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 05:26:44,833 INFO L256 TraceCheckSpWp]: Trace formula consists of 87 conjuncts, 8 conjuncts are in the unsatisfiable core [2024-11-28 05:26:44,834 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 05:26:44,889 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-28 05:26:44,889 INFO L308 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-28 05:26:44,889 INFO L136 FreeRefinementEngine]: Strategy FOX found an infeasible trace [2024-11-28 05:26:44,889 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [425962433] [2024-11-28 05:26:44,889 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [425962433] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-28 05:26:44,889 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-28 05:26:44,889 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-11-28 05:26:44,890 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [145200997] [2024-11-28 05:26:44,890 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-28 05:26:44,890 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-11-28 05:26:44,890 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FOX [2024-11-28 05:26:44,890 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-11-28 05:26:44,890 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=16, Unknown=0, NotChecked=0, Total=30 [2024-11-28 05:26:44,921 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 35 [2024-11-28 05:26:44,921 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 170 places, 234 transitions, 3133 flow. Second operand has 6 states, 6 states have (on average 16.0) internal successors, (96), 6 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 05:26:44,921 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-28 05:26:44,921 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 35 [2024-11-28 05:26:44,921 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-28 05:26:46,127 INFO L124 PetriNetUnfolderBase]: 3813/7663 cut-off events. [2024-11-28 05:26:46,127 INFO L125 PetriNetUnfolderBase]: For 84302/84718 co-relation queries the response was YES. [2024-11-28 05:26:46,168 INFO L83 FinitePrefix]: Finished finitePrefix Result has 43883 conditions, 7663 events. 3813/7663 cut-off events. For 84302/84718 co-relation queries the response was YES. Maximal size of possible extension queue 229. Compared 56864 event pairs, 1575 based on Foata normal form. 25/7553 useless extension candidates. Maximal degree in co-relation 43793. Up to 3908 conditions per place. [2024-11-28 05:26:46,189 INFO L140 encePairwiseOnDemand]: 27/35 looper letters, 254 selfloop transitions, 75 changer transitions 13/356 dead transitions. [2024-11-28 05:26:46,190 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 175 places, 356 transitions, 5509 flow [2024-11-28 05:26:46,190 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-11-28 05:26:46,190 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-11-28 05:26:46,190 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 122 transitions. [2024-11-28 05:26:46,191 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.580952380952381 [2024-11-28 05:26:46,191 INFO L175 Difference]: Start difference. First operand has 170 places, 234 transitions, 3133 flow. Second operand 6 states and 122 transitions. [2024-11-28 05:26:46,191 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 175 places, 356 transitions, 5509 flow [2024-11-28 05:26:46,413 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 175 places, 356 transitions, 5441 flow, removed 34 selfloop flow, removed 0 redundant places. [2024-11-28 05:26:46,416 INFO L231 Difference]: Finished difference. Result has 178 places, 265 transitions, 3927 flow [2024-11-28 05:26:46,417 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=35, PETRI_DIFFERENCE_MINUEND_FLOW=3097, PETRI_DIFFERENCE_MINUEND_PLACES=170, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=234, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=44, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=173, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=3927, PETRI_PLACES=178, PETRI_TRANSITIONS=265} [2024-11-28 05:26:46,417 INFO L279 CegarLoopForPetriNet]: 36 programPoint places, 142 predicate places. [2024-11-28 05:26:46,417 INFO L471 AbstractCegarLoop]: Abstraction has has 178 places, 265 transitions, 3927 flow [2024-11-28 05:26:46,417 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 16.0) internal successors, (96), 6 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 05:26:46,417 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-28 05:26:46,417 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 05:26:46,424 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_30f617b7-f0b1-412a-b7a3-a0ccf9358712/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Ended with exit code 0 [2024-11-28 05:26:46,618 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_30f617b7-f0b1-412a-b7a3-a0ccf9358712/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 05:26:46,618 INFO L396 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 11 more)] === [2024-11-28 05:26:46,618 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 05:26:46,618 INFO L85 PathProgramCache]: Analyzing trace with hash -1825650244, now seen corresponding path program 2 times [2024-11-28 05:26:46,619 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2024-11-28 05:26:46,619 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1906356540] [2024-11-28 05:26:46,619 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-28 05:26:46,619 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 05:26:46,619 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_30f617b7-f0b1-412a-b7a3-a0ccf9358712/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 05:26:46,622 INFO L229 MonitoredProcess]: Starting monitored process 25 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_30f617b7-f0b1-412a-b7a3-a0ccf9358712/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 05:26:46,625 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_30f617b7-f0b1-412a-b7a3-a0ccf9358712/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Waiting until timeout for monitored process [2024-11-28 05:26:46,706 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-28 05:26:46,706 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 05:26:46,711 INFO L256 TraceCheckSpWp]: Trace formula consists of 87 conjuncts, 8 conjuncts are in the unsatisfiable core [2024-11-28 05:26:46,712 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 05:26:46,783 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-28 05:26:46,783 INFO L308 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-28 05:26:46,783 INFO L136 FreeRefinementEngine]: Strategy FOX found an infeasible trace [2024-11-28 05:26:46,783 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1906356540] [2024-11-28 05:26:46,783 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1906356540] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-28 05:26:46,783 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-28 05:26:46,783 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-11-28 05:26:46,783 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [674848250] [2024-11-28 05:26:46,783 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-28 05:26:46,783 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-11-28 05:26:46,784 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FOX [2024-11-28 05:26:46,784 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-11-28 05:26:46,784 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=16, Unknown=0, NotChecked=0, Total=30 [2024-11-28 05:26:46,810 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 35 [2024-11-28 05:26:46,810 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 178 places, 265 transitions, 3927 flow. Second operand has 6 states, 6 states have (on average 16.0) internal successors, (96), 6 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 05:26:46,811 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-28 05:26:46,811 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 35 [2024-11-28 05:26:46,811 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-28 05:26:48,430 INFO L124 PetriNetUnfolderBase]: 3946/7847 cut-off events. [2024-11-28 05:26:48,430 INFO L125 PetriNetUnfolderBase]: For 89469/89928 co-relation queries the response was YES. [2024-11-28 05:26:48,499 INFO L83 FinitePrefix]: Finished finitePrefix Result has 45634 conditions, 7847 events. 3946/7847 cut-off events. For 89469/89928 co-relation queries the response was YES. Maximal size of possible extension queue 236. Compared 57886 event pairs, 1672 based on Foata normal form. 48/7743 useless extension candidates. Maximal degree in co-relation 45539. Up to 4071 conditions per place. [2024-11-28 05:26:48,532 INFO L140 encePairwiseOnDemand]: 27/35 looper letters, 222 selfloop transitions, 99 changer transitions 10/349 dead transitions. [2024-11-28 05:26:48,532 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 183 places, 349 transitions, 5742 flow [2024-11-28 05:26:48,532 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-11-28 05:26:48,533 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-11-28 05:26:48,533 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 122 transitions. [2024-11-28 05:26:48,533 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.580952380952381 [2024-11-28 05:26:48,533 INFO L175 Difference]: Start difference. First operand has 178 places, 265 transitions, 3927 flow. Second operand 6 states and 122 transitions. [2024-11-28 05:26:48,533 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 183 places, 349 transitions, 5742 flow [2024-11-28 05:26:48,820 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 179 places, 349 transitions, 5545 flow, removed 41 selfloop flow, removed 4 redundant places. [2024-11-28 05:26:48,825 INFO L231 Difference]: Finished difference. Result has 182 places, 291 transitions, 4556 flow [2024-11-28 05:26:48,825 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=35, PETRI_DIFFERENCE_MINUEND_FLOW=3771, PETRI_DIFFERENCE_MINUEND_PLACES=174, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=265, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=73, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=177, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=4556, PETRI_PLACES=182, PETRI_TRANSITIONS=291} [2024-11-28 05:26:48,825 INFO L279 CegarLoopForPetriNet]: 36 programPoint places, 146 predicate places. [2024-11-28 05:26:48,825 INFO L471 AbstractCegarLoop]: Abstraction has has 182 places, 291 transitions, 4556 flow [2024-11-28 05:26:48,825 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 16.0) internal successors, (96), 6 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 05:26:48,826 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-28 05:26:48,826 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 05:26:48,831 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_30f617b7-f0b1-412a-b7a3-a0ccf9358712/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Ended with exit code 0 [2024-11-28 05:26:49,026 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 25 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_30f617b7-f0b1-412a-b7a3-a0ccf9358712/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 05:26:49,026 INFO L396 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 11 more)] === [2024-11-28 05:26:49,026 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 05:26:49,027 INFO L85 PathProgramCache]: Analyzing trace with hash -818352882, now seen corresponding path program 3 times [2024-11-28 05:26:49,027 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2024-11-28 05:26:49,027 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [470940455] [2024-11-28 05:26:49,027 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-28 05:26:49,027 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 05:26:49,027 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_30f617b7-f0b1-412a-b7a3-a0ccf9358712/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 05:26:49,029 INFO L229 MonitoredProcess]: Starting monitored process 26 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_30f617b7-f0b1-412a-b7a3-a0ccf9358712/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 05:26:49,030 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_30f617b7-f0b1-412a-b7a3-a0ccf9358712/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Waiting until timeout for monitored process [2024-11-28 05:26:49,101 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2024-11-28 05:26:49,101 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 05:26:49,103 INFO L256 TraceCheckSpWp]: Trace formula consists of 87 conjuncts, 8 conjuncts are in the unsatisfiable core [2024-11-28 05:26:49,104 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 05:26:49,159 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-28 05:26:49,159 INFO L308 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-28 05:26:49,159 INFO L136 FreeRefinementEngine]: Strategy FOX found an infeasible trace [2024-11-28 05:26:49,159 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [470940455] [2024-11-28 05:26:49,159 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [470940455] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-28 05:26:49,159 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-28 05:26:49,159 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-11-28 05:26:49,160 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1424125658] [2024-11-28 05:26:49,160 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-28 05:26:49,160 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-11-28 05:26:49,160 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FOX [2024-11-28 05:26:49,160 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-11-28 05:26:49,160 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2024-11-28 05:26:49,189 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 35 [2024-11-28 05:26:49,189 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 182 places, 291 transitions, 4556 flow. Second operand has 6 states, 6 states have (on average 16.0) internal successors, (96), 6 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 05:26:49,189 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-28 05:26:49,189 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 35 [2024-11-28 05:26:49,189 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-28 05:26:50,583 INFO L124 PetriNetUnfolderBase]: 3833/7805 cut-off events. [2024-11-28 05:26:50,583 INFO L125 PetriNetUnfolderBase]: For 92990/93343 co-relation queries the response was YES. [2024-11-28 05:26:50,637 INFO L83 FinitePrefix]: Finished finitePrefix Result has 45562 conditions, 7805 events. 3833/7805 cut-off events. For 92990/93343 co-relation queries the response was YES. Maximal size of possible extension queue 231. Compared 58260 event pairs, 1464 based on Foata normal form. 30/7719 useless extension candidates. Maximal degree in co-relation 45466. Up to 3923 conditions per place. [2024-11-28 05:26:50,661 INFO L140 encePairwiseOnDemand]: 29/35 looper letters, 309 selfloop transitions, 58 changer transitions 9/394 dead transitions. [2024-11-28 05:26:50,661 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 187 places, 394 transitions, 6627 flow [2024-11-28 05:26:50,661 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-11-28 05:26:50,662 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-11-28 05:26:50,662 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 119 transitions. [2024-11-28 05:26:50,662 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.5666666666666667 [2024-11-28 05:26:50,662 INFO L175 Difference]: Start difference. First operand has 182 places, 291 transitions, 4556 flow. Second operand 6 states and 119 transitions. [2024-11-28 05:26:50,662 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 187 places, 394 transitions, 6627 flow [2024-11-28 05:26:50,940 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 184 places, 394 transitions, 6425 flow, removed 48 selfloop flow, removed 3 redundant places. [2024-11-28 05:26:50,944 INFO L231 Difference]: Finished difference. Result has 186 places, 288 transitions, 4446 flow [2024-11-28 05:26:50,945 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=35, PETRI_DIFFERENCE_MINUEND_FLOW=4364, PETRI_DIFFERENCE_MINUEND_PLACES=179, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=291, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=58, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=233, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=4446, PETRI_PLACES=186, PETRI_TRANSITIONS=288} [2024-11-28 05:26:50,945 INFO L279 CegarLoopForPetriNet]: 36 programPoint places, 150 predicate places. [2024-11-28 05:26:50,945 INFO L471 AbstractCegarLoop]: Abstraction has has 186 places, 288 transitions, 4446 flow [2024-11-28 05:26:50,945 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 16.0) internal successors, (96), 6 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 05:26:50,945 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-28 05:26:50,945 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 05:26:50,952 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_30f617b7-f0b1-412a-b7a3-a0ccf9358712/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Ended with exit code 0 [2024-11-28 05:26:51,146 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_30f617b7-f0b1-412a-b7a3-a0ccf9358712/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 05:26:51,146 INFO L396 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 11 more)] === [2024-11-28 05:26:51,146 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 05:26:51,146 INFO L85 PathProgramCache]: Analyzing trace with hash -1876713546, now seen corresponding path program 4 times [2024-11-28 05:26:51,146 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2024-11-28 05:26:51,146 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [920010545] [2024-11-28 05:26:51,147 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-11-28 05:26:51,147 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 05:26:51,147 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_30f617b7-f0b1-412a-b7a3-a0ccf9358712/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 05:26:51,148 INFO L229 MonitoredProcess]: Starting monitored process 27 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_30f617b7-f0b1-412a-b7a3-a0ccf9358712/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 05:26:51,150 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_30f617b7-f0b1-412a-b7a3-a0ccf9358712/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Waiting until timeout for monitored process [2024-11-28 05:26:51,208 INFO L229 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-11-28 05:26:51,208 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 05:26:51,209 INFO L256 TraceCheckSpWp]: Trace formula consists of 54 conjuncts, 4 conjuncts are in the unsatisfiable core [2024-11-28 05:26:51,210 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 05:26:51,237 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-28 05:26:51,237 INFO L308 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-28 05:26:51,237 INFO L136 FreeRefinementEngine]: Strategy FOX found an infeasible trace [2024-11-28 05:26:51,237 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [920010545] [2024-11-28 05:26:51,237 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [920010545] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-28 05:26:51,237 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-28 05:26:51,237 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-11-28 05:26:51,237 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [701181110] [2024-11-28 05:26:51,237 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-28 05:26:51,238 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-11-28 05:26:51,238 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FOX [2024-11-28 05:26:51,238 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-11-28 05:26:51,238 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2024-11-28 05:26:51,261 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 35 [2024-11-28 05:26:51,261 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 186 places, 288 transitions, 4446 flow. Second operand has 5 states, 5 states have (on average 16.6) internal successors, (83), 5 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 05:26:51,261 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-28 05:26:51,261 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 35 [2024-11-28 05:26:51,261 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-28 05:26:52,581 INFO L124 PetriNetUnfolderBase]: 3791/7698 cut-off events. [2024-11-28 05:26:52,581 INFO L125 PetriNetUnfolderBase]: For 94937/95127 co-relation queries the response was YES. [2024-11-28 05:26:52,626 INFO L83 FinitePrefix]: Finished finitePrefix Result has 44925 conditions, 7698 events. 3791/7698 cut-off events. For 94937/95127 co-relation queries the response was YES. Maximal size of possible extension queue 230. Compared 57263 event pairs, 1270 based on Foata normal form. 25/7609 useless extension candidates. Maximal degree in co-relation 44828. Up to 3716 conditions per place. [2024-11-28 05:26:52,648 INFO L140 encePairwiseOnDemand]: 28/35 looper letters, 227 selfloop transitions, 96 changer transitions 5/342 dead transitions. [2024-11-28 05:26:52,648 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 189 places, 342 transitions, 5641 flow [2024-11-28 05:26:52,649 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-11-28 05:26:52,649 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-11-28 05:26:52,649 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 109 transitions. [2024-11-28 05:26:52,649 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.6228571428571429 [2024-11-28 05:26:52,649 INFO L175 Difference]: Start difference. First operand has 186 places, 288 transitions, 4446 flow. Second operand 5 states and 109 transitions. [2024-11-28 05:26:52,649 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 189 places, 342 transitions, 5641 flow [2024-11-28 05:26:52,881 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 184 places, 342 transitions, 5505 flow, removed 7 selfloop flow, removed 5 redundant places. [2024-11-28 05:26:52,885 INFO L231 Difference]: Finished difference. Result has 185 places, 286 transitions, 4482 flow [2024-11-28 05:26:52,886 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=35, PETRI_DIFFERENCE_MINUEND_FLOW=4316, PETRI_DIFFERENCE_MINUEND_PLACES=180, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=288, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=93, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=192, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=4482, PETRI_PLACES=185, PETRI_TRANSITIONS=286} [2024-11-28 05:26:52,886 INFO L279 CegarLoopForPetriNet]: 36 programPoint places, 149 predicate places. [2024-11-28 05:26:52,886 INFO L471 AbstractCegarLoop]: Abstraction has has 185 places, 286 transitions, 4482 flow [2024-11-28 05:26:52,886 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 16.6) internal successors, (83), 5 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 05:26:52,886 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-28 05:26:52,886 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 05:26:52,892 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_30f617b7-f0b1-412a-b7a3-a0ccf9358712/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Ended with exit code 0 [2024-11-28 05:26:53,087 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_30f617b7-f0b1-412a-b7a3-a0ccf9358712/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 05:26:53,087 INFO L396 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 11 more)] === [2024-11-28 05:26:53,087 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 05:26:53,087 INFO L85 PathProgramCache]: Analyzing trace with hash -815396106, now seen corresponding path program 4 times [2024-11-28 05:26:53,088 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2024-11-28 05:26:53,088 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1847071723] [2024-11-28 05:26:53,088 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-11-28 05:26:53,088 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 05:26:53,088 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_30f617b7-f0b1-412a-b7a3-a0ccf9358712/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 05:26:53,089 INFO L229 MonitoredProcess]: Starting monitored process 28 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_30f617b7-f0b1-412a-b7a3-a0ccf9358712/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 05:26:53,090 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_30f617b7-f0b1-412a-b7a3-a0ccf9358712/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Waiting until timeout for monitored process [2024-11-28 05:26:53,149 INFO L229 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-11-28 05:26:53,149 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 05:26:53,150 INFO L256 TraceCheckSpWp]: Trace formula consists of 54 conjuncts, 4 conjuncts are in the unsatisfiable core [2024-11-28 05:26:53,150 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 05:26:53,190 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-28 05:26:53,190 INFO L308 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-28 05:26:53,191 INFO L136 FreeRefinementEngine]: Strategy FOX found an infeasible trace [2024-11-28 05:26:53,191 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1847071723] [2024-11-28 05:26:53,191 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1847071723] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-28 05:26:53,191 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-28 05:26:53,191 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-11-28 05:26:53,191 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [635522269] [2024-11-28 05:26:53,191 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-28 05:26:53,191 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-11-28 05:26:53,191 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FOX [2024-11-28 05:26:53,191 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-11-28 05:26:53,191 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2024-11-28 05:26:53,219 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 35 [2024-11-28 05:26:53,220 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 185 places, 286 transitions, 4482 flow. Second operand has 5 states, 5 states have (on average 15.6) internal successors, (78), 5 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) [2024-11-28 05:26:53,220 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-28 05:26:53,220 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 35 [2024-11-28 05:26:53,220 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-28 05:26:54,837 INFO L124 PetriNetUnfolderBase]: 4850/9166 cut-off events. [2024-11-28 05:26:54,838 INFO L125 PetriNetUnfolderBase]: For 110058/110096 co-relation queries the response was YES. [2024-11-28 05:26:54,890 INFO L83 FinitePrefix]: Finished finitePrefix Result has 54222 conditions, 9166 events. 4850/9166 cut-off events. For 110058/110096 co-relation queries the response was YES. Maximal size of possible extension queue 255. Compared 65309 event pairs, 1601 based on Foata normal form. 32/9088 useless extension candidates. Maximal degree in co-relation 54127. Up to 4652 conditions per place. [2024-11-28 05:26:54,916 INFO L140 encePairwiseOnDemand]: 27/35 looper letters, 276 selfloop transitions, 94 changer transitions 3/382 dead transitions. [2024-11-28 05:26:54,916 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 189 places, 382 transitions, 6250 flow [2024-11-28 05:26:54,916 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-11-28 05:26:54,916 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-11-28 05:26:54,917 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 129 transitions. [2024-11-28 05:26:54,917 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.6142857142857143 [2024-11-28 05:26:54,917 INFO L175 Difference]: Start difference. First operand has 185 places, 286 transitions, 4482 flow. Second operand 6 states and 129 transitions. [2024-11-28 05:26:54,917 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 189 places, 382 transitions, 6250 flow [2024-11-28 05:26:55,196 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 185 places, 382 transitions, 6064 flow, removed 4 selfloop flow, removed 4 redundant places. [2024-11-28 05:26:55,200 INFO L231 Difference]: Finished difference. Result has 187 places, 284 transitions, 4448 flow [2024-11-28 05:26:55,200 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=35, PETRI_DIFFERENCE_MINUEND_FLOW=4068, PETRI_DIFFERENCE_MINUEND_PLACES=180, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=273, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=80, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=185, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=4448, PETRI_PLACES=187, PETRI_TRANSITIONS=284} [2024-11-28 05:26:55,201 INFO L279 CegarLoopForPetriNet]: 36 programPoint places, 151 predicate places. [2024-11-28 05:26:55,201 INFO L471 AbstractCegarLoop]: Abstraction has has 187 places, 284 transitions, 4448 flow [2024-11-28 05:26:55,201 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 15.6) internal successors, (78), 5 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) [2024-11-28 05:26:55,201 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-28 05:26:55,201 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 05:26:55,207 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_30f617b7-f0b1-412a-b7a3-a0ccf9358712/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Ended with exit code 0 [2024-11-28 05:26:55,401 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_30f617b7-f0b1-412a-b7a3-a0ccf9358712/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 05:26:55,401 INFO L396 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 11 more)] === [2024-11-28 05:26:55,402 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 05:26:55,402 INFO L85 PathProgramCache]: Analyzing trace with hash 194961274, now seen corresponding path program 5 times [2024-11-28 05:26:55,402 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2024-11-28 05:26:55,402 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1438607947] [2024-11-28 05:26:55,402 INFO L95 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-11-28 05:26:55,402 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 05:26:55,402 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_30f617b7-f0b1-412a-b7a3-a0ccf9358712/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 05:26:55,404 INFO L229 MonitoredProcess]: Starting monitored process 29 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_30f617b7-f0b1-412a-b7a3-a0ccf9358712/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 05:26:55,406 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_30f617b7-f0b1-412a-b7a3-a0ccf9358712/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Waiting until timeout for monitored process [2024-11-28 05:26:55,478 INFO L229 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-28 05:26:55,478 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 05:26:55,480 INFO L256 TraceCheckSpWp]: Trace formula consists of 87 conjuncts, 8 conjuncts are in the unsatisfiable core [2024-11-28 05:26:55,481 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 05:26:55,538 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-28 05:26:55,538 INFO L308 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-28 05:26:55,538 INFO L136 FreeRefinementEngine]: Strategy FOX found an infeasible trace [2024-11-28 05:26:55,538 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1438607947] [2024-11-28 05:26:55,538 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1438607947] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-28 05:26:55,539 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-28 05:26:55,539 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-11-28 05:26:55,539 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [970383824] [2024-11-28 05:26:55,539 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-28 05:26:55,539 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-11-28 05:26:55,539 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FOX [2024-11-28 05:26:55,539 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-11-28 05:26:55,540 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=16, Unknown=0, NotChecked=0, Total=30 [2024-11-28 05:26:55,554 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 35 [2024-11-28 05:26:55,554 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 187 places, 284 transitions, 4448 flow. Second operand has 6 states, 6 states have (on average 15.0) internal successors, (90), 6 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 05:26:55,554 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-28 05:26:55,554 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 35 [2024-11-28 05:26:55,554 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-28 05:26:57,223 INFO L124 PetriNetUnfolderBase]: 4752/8915 cut-off events. [2024-11-28 05:26:57,223 INFO L125 PetriNetUnfolderBase]: For 111453/111515 co-relation queries the response was YES. [2024-11-28 05:26:57,291 INFO L83 FinitePrefix]: Finished finitePrefix Result has 53580 conditions, 8915 events. 4752/8915 cut-off events. For 111453/111515 co-relation queries the response was YES. Maximal size of possible extension queue 249. Compared 62893 event pairs, 1830 based on Foata normal form. 30/8836 useless extension candidates. Maximal degree in co-relation 53484. Up to 4622 conditions per place. [2024-11-28 05:26:57,328 INFO L140 encePairwiseOnDemand]: 26/35 looper letters, 296 selfloop transitions, 90 changer transitions 0/395 dead transitions. [2024-11-28 05:26:57,328 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 190 places, 395 transitions, 6477 flow [2024-11-28 05:26:57,328 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-11-28 05:26:57,328 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-11-28 05:26:57,329 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 136 transitions. [2024-11-28 05:26:57,329 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.5551020408163265 [2024-11-28 05:26:57,329 INFO L175 Difference]: Start difference. First operand has 187 places, 284 transitions, 4448 flow. Second operand 7 states and 136 transitions. [2024-11-28 05:26:57,329 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 190 places, 395 transitions, 6477 flow [2024-11-28 05:26:57,673 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 184 places, 395 transitions, 6236 flow, removed 13 selfloop flow, removed 6 redundant places. [2024-11-28 05:26:57,679 INFO L231 Difference]: Finished difference. Result has 186 places, 279 transitions, 4328 flow [2024-11-28 05:26:57,680 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=35, PETRI_DIFFERENCE_MINUEND_FLOW=4066, PETRI_DIFFERENCE_MINUEND_PLACES=178, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=276, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=87, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=186, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=4328, PETRI_PLACES=186, PETRI_TRANSITIONS=279} [2024-11-28 05:26:57,680 INFO L279 CegarLoopForPetriNet]: 36 programPoint places, 150 predicate places. [2024-11-28 05:26:57,680 INFO L471 AbstractCegarLoop]: Abstraction has has 186 places, 279 transitions, 4328 flow [2024-11-28 05:26:57,680 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 15.0) internal successors, (90), 6 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 05:26:57,680 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-28 05:26:57,680 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 05:26:57,689 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_30f617b7-f0b1-412a-b7a3-a0ccf9358712/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Ended with exit code 0 [2024-11-28 05:26:57,881 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 29 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_30f617b7-f0b1-412a-b7a3-a0ccf9358712/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 05:26:57,881 INFO L396 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 11 more)] === [2024-11-28 05:26:57,881 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 05:26:57,881 INFO L85 PathProgramCache]: Analyzing trace with hash 1808528008, now seen corresponding path program 6 times [2024-11-28 05:26:57,882 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2024-11-28 05:26:57,882 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [395651475] [2024-11-28 05:26:57,882 INFO L95 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2024-11-28 05:26:57,882 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 05:26:57,882 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_30f617b7-f0b1-412a-b7a3-a0ccf9358712/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 05:26:57,883 INFO L229 MonitoredProcess]: Starting monitored process 30 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_30f617b7-f0b1-412a-b7a3-a0ccf9358712/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 05:26:57,884 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_30f617b7-f0b1-412a-b7a3-a0ccf9358712/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Waiting until timeout for monitored process [2024-11-28 05:26:57,957 INFO L229 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2024-11-28 05:26:57,957 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 05:26:57,959 INFO L256 TraceCheckSpWp]: Trace formula consists of 87 conjuncts, 8 conjuncts are in the unsatisfiable core [2024-11-28 05:26:57,961 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 05:26:58,024 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-28 05:26:58,024 INFO L308 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-28 05:26:58,024 INFO L136 FreeRefinementEngine]: Strategy FOX found an infeasible trace [2024-11-28 05:26:58,024 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [395651475] [2024-11-28 05:26:58,024 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [395651475] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-28 05:26:58,024 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-28 05:26:58,024 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-11-28 05:26:58,024 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [959612242] [2024-11-28 05:26:58,024 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-28 05:26:58,025 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-11-28 05:26:58,025 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FOX [2024-11-28 05:26:58,025 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-11-28 05:26:58,025 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2024-11-28 05:26:58,058 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 35 [2024-11-28 05:26:58,058 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 186 places, 279 transitions, 4328 flow. Second operand has 6 states, 6 states have (on average 16.0) internal successors, (96), 6 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 05:26:58,058 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-28 05:26:58,058 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 35 [2024-11-28 05:26:58,058 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-28 05:26:59,668 INFO L124 PetriNetUnfolderBase]: 4079/7968 cut-off events. [2024-11-28 05:26:59,668 INFO L125 PetriNetUnfolderBase]: For 105610/106133 co-relation queries the response was YES. [2024-11-28 05:26:59,724 INFO L83 FinitePrefix]: Finished finitePrefix Result has 48064 conditions, 7968 events. 4079/7968 cut-off events. For 105610/106133 co-relation queries the response was YES. Maximal size of possible extension queue 237. Compared 57903 event pairs, 1540 based on Foata normal form. 26/7825 useless extension candidates. Maximal degree in co-relation 47968. Up to 3957 conditions per place. [2024-11-28 05:26:59,749 INFO L140 encePairwiseOnDemand]: 28/35 looper letters, 245 selfloop transitions, 77 changer transitions 4/349 dead transitions. [2024-11-28 05:26:59,749 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 191 places, 349 transitions, 5748 flow [2024-11-28 05:26:59,750 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-11-28 05:26:59,750 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-11-28 05:26:59,750 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 116 transitions. [2024-11-28 05:26:59,750 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.5523809523809524 [2024-11-28 05:26:59,750 INFO L175 Difference]: Start difference. First operand has 186 places, 279 transitions, 4328 flow. Second operand 6 states and 116 transitions. [2024-11-28 05:26:59,750 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 191 places, 349 transitions, 5748 flow [2024-11-28 05:27:00,050 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 186 places, 349 transitions, 5534 flow, removed 5 selfloop flow, removed 5 redundant places. [2024-11-28 05:27:00,054 INFO L231 Difference]: Finished difference. Result has 187 places, 276 transitions, 4228 flow [2024-11-28 05:27:00,054 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=35, PETRI_DIFFERENCE_MINUEND_FLOW=4118, PETRI_DIFFERENCE_MINUEND_PLACES=181, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=279, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=77, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=202, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=4228, PETRI_PLACES=187, PETRI_TRANSITIONS=276} [2024-11-28 05:27:00,055 INFO L279 CegarLoopForPetriNet]: 36 programPoint places, 151 predicate places. [2024-11-28 05:27:00,055 INFO L471 AbstractCegarLoop]: Abstraction has has 187 places, 276 transitions, 4228 flow [2024-11-28 05:27:00,055 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 16.0) internal successors, (96), 6 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 05:27:00,055 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-28 05:27:00,055 INFO L206 CegarLoopForPetriNet]: trace histogram [3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 05:27:00,062 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_30f617b7-f0b1-412a-b7a3-a0ccf9358712/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Ended with exit code 0 [2024-11-28 05:27:00,255 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 30 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_30f617b7-f0b1-412a-b7a3-a0ccf9358712/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 05:27:00,256 INFO L396 AbstractCegarLoop]: === Iteration 30 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 11 more)] === [2024-11-28 05:27:00,256 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 05:27:00,256 INFO L85 PathProgramCache]: Analyzing trace with hash -954759040, now seen corresponding path program 4 times [2024-11-28 05:27:00,256 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2024-11-28 05:27:00,256 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [937704389] [2024-11-28 05:27:00,256 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-11-28 05:27:00,256 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 05:27:00,256 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_30f617b7-f0b1-412a-b7a3-a0ccf9358712/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 05:27:00,258 INFO L229 MonitoredProcess]: Starting monitored process 31 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_30f617b7-f0b1-412a-b7a3-a0ccf9358712/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 05:27:00,259 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_30f617b7-f0b1-412a-b7a3-a0ccf9358712/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Waiting until timeout for monitored process [2024-11-28 05:27:00,350 INFO L229 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-11-28 05:27:00,350 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 05:27:00,353 INFO L256 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 20 conjuncts are in the unsatisfiable core [2024-11-28 05:27:00,354 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 05:27:00,359 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 8 treesize of output 7 [2024-11-28 05:27:00,980 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 17 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-28 05:27:00,980 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-28 05:27:02,516 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 17 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-28 05:27:02,516 INFO L136 FreeRefinementEngine]: Strategy FOX found an infeasible trace [2024-11-28 05:27:02,516 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [937704389] [2024-11-28 05:27:02,516 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [937704389] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-28 05:27:02,517 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-11-28 05:27:02,517 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10] total 19 [2024-11-28 05:27:02,517 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [680946625] [2024-11-28 05:27:02,517 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-11-28 05:27:02,517 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2024-11-28 05:27:02,517 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FOX [2024-11-28 05:27:02,517 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2024-11-28 05:27:02,518 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=342, Unknown=0, NotChecked=0, Total=420 [2024-11-28 05:27:04,133 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 35 [2024-11-28 05:27:04,133 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 187 places, 276 transitions, 4228 flow. Second operand has 21 states, 21 states have (on average 13.619047619047619) internal successors, (286), 21 states have internal predecessors, (286), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 05:27:04,133 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-28 05:27:04,133 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 35 [2024-11-28 05:27:04,133 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-28 05:27:10,597 INFO L124 PetriNetUnfolderBase]: 5015/9925 cut-off events. [2024-11-28 05:27:10,597 INFO L125 PetriNetUnfolderBase]: For 128898/129835 co-relation queries the response was YES. [2024-11-28 05:27:10,682 INFO L83 FinitePrefix]: Finished finitePrefix Result has 58288 conditions, 9925 events. 5015/9925 cut-off events. For 128898/129835 co-relation queries the response was YES. Maximal size of possible extension queue 268. Compared 72821 event pairs, 974 based on Foata normal form. 255/9968 useless extension candidates. Maximal degree in co-relation 58191. Up to 2387 conditions per place. [2024-11-28 05:27:10,715 INFO L140 encePairwiseOnDemand]: 26/35 looper letters, 488 selfloop transitions, 139 changer transitions 0/655 dead transitions. [2024-11-28 05:27:10,715 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 210 places, 655 transitions, 10507 flow [2024-11-28 05:27:10,716 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2024-11-28 05:27:10,716 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2024-11-28 05:27:10,717 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 493 transitions. [2024-11-28 05:27:10,717 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.5417582417582417 [2024-11-28 05:27:10,717 INFO L175 Difference]: Start difference. First operand has 187 places, 276 transitions, 4228 flow. Second operand 26 states and 493 transitions. [2024-11-28 05:27:10,717 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 210 places, 655 transitions, 10507 flow [2024-11-28 05:27:11,039 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 205 places, 655 transitions, 10295 flow, removed 1 selfloop flow, removed 5 redundant places. [2024-11-28 05:27:11,045 INFO L231 Difference]: Finished difference. Result has 213 places, 330 transitions, 5224 flow [2024-11-28 05:27:11,045 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=35, PETRI_DIFFERENCE_MINUEND_FLOW=4072, PETRI_DIFFERENCE_MINUEND_PLACES=180, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=276, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=91, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=174, PETRI_DIFFERENCE_SUBTRAHEND_STATES=26, PETRI_FLOW=5224, PETRI_PLACES=213, PETRI_TRANSITIONS=330} [2024-11-28 05:27:11,045 INFO L279 CegarLoopForPetriNet]: 36 programPoint places, 177 predicate places. [2024-11-28 05:27:11,046 INFO L471 AbstractCegarLoop]: Abstraction has has 213 places, 330 transitions, 5224 flow [2024-11-28 05:27:11,046 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 13.619047619047619) internal successors, (286), 21 states have internal predecessors, (286), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 05:27:11,046 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-28 05:27:11,046 INFO L206 CegarLoopForPetriNet]: trace histogram [6, 6, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 05:27:11,052 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_30f617b7-f0b1-412a-b7a3-a0ccf9358712/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Ended with exit code 0 [2024-11-28 05:27:11,246 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 31 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_30f617b7-f0b1-412a-b7a3-a0ccf9358712/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 05:27:11,246 INFO L396 AbstractCegarLoop]: === Iteration 31 === Targeting thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 11 more)] === [2024-11-28 05:27:11,247 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 05:27:11,247 INFO L85 PathProgramCache]: Analyzing trace with hash -1262376801, now seen corresponding path program 5 times [2024-11-28 05:27:11,247 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2024-11-28 05:27:11,247 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [86205332] [2024-11-28 05:27:11,247 INFO L95 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-11-28 05:27:11,247 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 05:27:11,247 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_30f617b7-f0b1-412a-b7a3-a0ccf9358712/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 05:27:11,249 INFO L229 MonitoredProcess]: Starting monitored process 32 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_30f617b7-f0b1-412a-b7a3-a0ccf9358712/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 05:27:11,250 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_30f617b7-f0b1-412a-b7a3-a0ccf9358712/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Waiting until timeout for monitored process [2024-11-28 05:27:11,379 INFO L229 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2024-11-28 05:27:11,379 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 05:27:11,383 INFO L256 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 15 conjuncts are in the unsatisfiable core [2024-11-28 05:27:11,384 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 05:27:11,391 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 8 treesize of output 7 [2024-11-28 05:27:11,839 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 0 proven. 26 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2024-11-28 05:27:11,839 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-28 05:27:12,490 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 20 proven. 6 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2024-11-28 05:27:12,490 INFO L136 FreeRefinementEngine]: Strategy FOX found an infeasible trace [2024-11-28 05:27:12,490 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [86205332] [2024-11-28 05:27:12,490 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [86205332] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-28 05:27:12,490 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-11-28 05:27:12,491 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 14 [2024-11-28 05:27:12,491 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [12054033] [2024-11-28 05:27:12,491 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-11-28 05:27:12,491 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2024-11-28 05:27:12,491 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FOX [2024-11-28 05:27:12,491 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2024-11-28 05:27:12,492 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=187, Unknown=0, NotChecked=0, Total=240 [2024-11-28 05:27:13,304 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 35 [2024-11-28 05:27:13,305 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 213 places, 330 transitions, 5224 flow. Second operand has 16 states, 16 states have (on average 13.75) internal successors, (220), 16 states have internal predecessors, (220), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 05:27:13,305 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-28 05:27:13,305 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 35 [2024-11-28 05:27:13,305 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-28 05:27:17,820 INFO L124 PetriNetUnfolderBase]: 5402/10447 cut-off events. [2024-11-28 05:27:17,820 INFO L125 PetriNetUnfolderBase]: For 165509/166125 co-relation queries the response was YES. [2024-11-28 05:27:17,901 INFO L83 FinitePrefix]: Finished finitePrefix Result has 65633 conditions, 10447 events. 5402/10447 cut-off events. For 165509/166125 co-relation queries the response was YES. Maximal size of possible extension queue 263. Compared 76032 event pairs, 1285 based on Foata normal form. 126/10235 useless extension candidates. Maximal degree in co-relation 65527. Up to 2567 conditions per place. [2024-11-28 05:27:17,939 INFO L140 encePairwiseOnDemand]: 26/35 looper letters, 372 selfloop transitions, 112 changer transitions 0/512 dead transitions. [2024-11-28 05:27:17,940 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 229 places, 512 transitions, 8647 flow [2024-11-28 05:27:17,940 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2024-11-28 05:27:17,940 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2024-11-28 05:27:17,941 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 323 transitions. [2024-11-28 05:27:17,941 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.5428571428571428 [2024-11-28 05:27:17,941 INFO L175 Difference]: Start difference. First operand has 213 places, 330 transitions, 5224 flow. Second operand 17 states and 323 transitions. [2024-11-28 05:27:17,941 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 229 places, 512 transitions, 8647 flow [2024-11-28 05:27:18,355 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 218 places, 512 transitions, 8337 flow, removed 124 selfloop flow, removed 11 redundant places. [2024-11-28 05:27:18,361 INFO L231 Difference]: Finished difference. Result has 221 places, 337 transitions, 5531 flow [2024-11-28 05:27:18,361 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=35, PETRI_DIFFERENCE_MINUEND_FLOW=5076, PETRI_DIFFERENCE_MINUEND_PLACES=202, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=330, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=106, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=220, PETRI_DIFFERENCE_SUBTRAHEND_STATES=17, PETRI_FLOW=5531, PETRI_PLACES=221, PETRI_TRANSITIONS=337} [2024-11-28 05:27:18,362 INFO L279 CegarLoopForPetriNet]: 36 programPoint places, 185 predicate places. [2024-11-28 05:27:18,362 INFO L471 AbstractCegarLoop]: Abstraction has has 221 places, 337 transitions, 5531 flow [2024-11-28 05:27:18,362 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 13.75) internal successors, (220), 16 states have internal predecessors, (220), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 05:27:18,362 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-28 05:27:18,362 INFO L206 CegarLoopForPetriNet]: trace histogram [11, 10, 1, 1] [2024-11-28 05:27:18,369 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_30f617b7-f0b1-412a-b7a3-a0ccf9358712/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Ended with exit code 0 [2024-11-28 05:27:18,562 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 32 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_30f617b7-f0b1-412a-b7a3-a0ccf9358712/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 05:27:18,563 INFO L396 AbstractCegarLoop]: === Iteration 32 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 11 more)] === [2024-11-28 05:27:18,563 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 05:27:18,563 INFO L85 PathProgramCache]: Analyzing trace with hash -873039541, now seen corresponding path program 3 times [2024-11-28 05:27:18,563 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2024-11-28 05:27:18,563 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [467944869] [2024-11-28 05:27:18,563 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-28 05:27:18,563 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 05:27:18,563 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_30f617b7-f0b1-412a-b7a3-a0ccf9358712/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 05:27:18,565 INFO L229 MonitoredProcess]: Starting monitored process 33 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_30f617b7-f0b1-412a-b7a3-a0ccf9358712/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 05:27:18,566 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_30f617b7-f0b1-412a-b7a3-a0ccf9358712/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Waiting until timeout for monitored process [2024-11-28 05:27:18,997 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 11 check-sat command(s) [2024-11-28 05:27:18,997 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 05:27:19,001 INFO L256 TraceCheckSpWp]: Trace formula consists of 119 conjuncts, 18 conjuncts are in the unsatisfiable core [2024-11-28 05:27:19,003 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 05:27:19,010 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 8 treesize of output 7 [2024-11-28 05:27:19,614 INFO L134 CoverageAnalysis]: Checked inductivity of 110 backedges. 0 proven. 110 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-28 05:27:19,615 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-28 05:27:22,029 INFO L134 CoverageAnalysis]: Checked inductivity of 110 backedges. 0 proven. 110 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-28 05:27:22,029 INFO L136 FreeRefinementEngine]: Strategy FOX found an infeasible trace [2024-11-28 05:27:22,029 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [467944869] [2024-11-28 05:27:22,030 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [467944869] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-28 05:27:22,030 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-11-28 05:27:22,030 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 24 [2024-11-28 05:27:22,030 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1819547818] [2024-11-28 05:27:22,030 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-11-28 05:27:22,030 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2024-11-28 05:27:22,030 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FOX [2024-11-28 05:27:22,031 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2024-11-28 05:27:22,031 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=173, Invalid=477, Unknown=0, NotChecked=0, Total=650 [2024-11-28 05:27:24,088 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 35 [2024-11-28 05:27:24,088 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 221 places, 337 transitions, 5531 flow. Second operand has 26 states, 26 states have (on average 14.76923076923077) internal successors, (384), 26 states have internal predecessors, (384), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 05:27:24,088 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-28 05:27:24,088 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 35 [2024-11-28 05:27:24,088 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-28 05:27:43,324 INFO L124 PetriNetUnfolderBase]: 5019/9750 cut-off events. [2024-11-28 05:27:43,324 INFO L125 PetriNetUnfolderBase]: For 163323/164433 co-relation queries the response was YES. [2024-11-28 05:27:43,395 INFO L83 FinitePrefix]: Finished finitePrefix Result has 63494 conditions, 9750 events. 5019/9750 cut-off events. For 163323/164433 co-relation queries the response was YES. Maximal size of possible extension queue 261. Compared 71737 event pairs, 2561 based on Foata normal form. 18/9431 useless extension candidates. Maximal degree in co-relation 63110. Up to 6632 conditions per place. [2024-11-28 05:27:43,428 INFO L140 encePairwiseOnDemand]: 30/35 looper letters, 277 selfloop transitions, 66 changer transitions 0/373 dead transitions. [2024-11-28 05:27:43,428 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 266 places, 373 transitions, 6709 flow [2024-11-28 05:27:43,428 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2024-11-28 05:27:43,429 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 46 states. [2024-11-28 05:27:43,430 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 695 transitions. [2024-11-28 05:27:43,430 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.43167701863354035 [2024-11-28 05:27:43,430 INFO L175 Difference]: Start difference. First operand has 221 places, 337 transitions, 5531 flow. Second operand 46 states and 695 transitions. [2024-11-28 05:27:43,430 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 266 places, 373 transitions, 6709 flow [2024-11-28 05:27:43,816 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 255 places, 373 transitions, 6606 flow, removed 16 selfloop flow, removed 11 redundant places. [2024-11-28 05:27:43,823 INFO L231 Difference]: Finished difference. Result has 267 places, 373 transitions, 6106 flow [2024-11-28 05:27:43,823 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=35, PETRI_DIFFERENCE_MINUEND_FLOW=5440, PETRI_DIFFERENCE_MINUEND_PLACES=210, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=337, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=33, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=304, PETRI_DIFFERENCE_SUBTRAHEND_STATES=46, PETRI_FLOW=6106, PETRI_PLACES=267, PETRI_TRANSITIONS=373} [2024-11-28 05:27:43,824 INFO L279 CegarLoopForPetriNet]: 36 programPoint places, 231 predicate places. [2024-11-28 05:27:43,824 INFO L471 AbstractCegarLoop]: Abstraction has has 267 places, 373 transitions, 6106 flow [2024-11-28 05:27:43,824 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 14.76923076923077) internal successors, (384), 26 states have internal predecessors, (384), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 05:27:43,824 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-28 05:27:43,824 INFO L206 CegarLoopForPetriNet]: trace histogram [4, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1] [2024-11-28 05:27:43,836 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_30f617b7-f0b1-412a-b7a3-a0ccf9358712/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Ended with exit code 0 [2024-11-28 05:27:44,024 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 33 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_30f617b7-f0b1-412a-b7a3-a0ccf9358712/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 05:27:44,025 INFO L396 AbstractCegarLoop]: === Iteration 33 === Targeting thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 11 more)] === [2024-11-28 05:27:44,025 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 05:27:44,025 INFO L85 PathProgramCache]: Analyzing trace with hash 1503424698, now seen corresponding path program 6 times [2024-11-28 05:27:44,025 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2024-11-28 05:27:44,025 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1393337427] [2024-11-28 05:27:44,025 INFO L95 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2024-11-28 05:27:44,025 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 05:27:44,025 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_30f617b7-f0b1-412a-b7a3-a0ccf9358712/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 05:27:44,027 INFO L229 MonitoredProcess]: Starting monitored process 34 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_30f617b7-f0b1-412a-b7a3-a0ccf9358712/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 05:27:44,028 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_30f617b7-f0b1-412a-b7a3-a0ccf9358712/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Waiting until timeout for monitored process [2024-11-28 05:27:44,125 INFO L229 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2024-11-28 05:27:44,125 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 05:27:44,129 INFO L256 TraceCheckSpWp]: Trace formula consists of 104 conjuncts, 15 conjuncts are in the unsatisfiable core [2024-11-28 05:27:44,130 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 05:27:44,449 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 3 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-28 05:27:44,449 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-28 05:27:44,955 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 3 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-28 05:27:44,955 INFO L136 FreeRefinementEngine]: Strategy FOX found an infeasible trace [2024-11-28 05:27:44,956 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1393337427] [2024-11-28 05:27:44,956 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1393337427] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-28 05:27:44,956 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-11-28 05:27:44,956 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 21 [2024-11-28 05:27:44,956 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1111874785] [2024-11-28 05:27:44,956 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-11-28 05:27:44,956 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2024-11-28 05:27:44,956 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FOX [2024-11-28 05:27:44,957 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2024-11-28 05:27:44,957 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=108, Invalid=354, Unknown=0, NotChecked=0, Total=462 [2024-11-28 05:27:45,496 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 35 [2024-11-28 05:27:45,497 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 267 places, 373 transitions, 6106 flow. Second operand has 22 states, 22 states have (on average 14.818181818181818) internal successors, (326), 22 states have internal predecessors, (326), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 05:27:45,497 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-28 05:27:45,497 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 35 [2024-11-28 05:27:45,497 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-28 05:27:48,976 INFO L124 PetriNetUnfolderBase]: 4571/8720 cut-off events. [2024-11-28 05:27:48,976 INFO L125 PetriNetUnfolderBase]: For 127881/128813 co-relation queries the response was YES. [2024-11-28 05:27:49,080 INFO L83 FinitePrefix]: Finished finitePrefix Result has 54429 conditions, 8720 events. 4571/8720 cut-off events. For 127881/128813 co-relation queries the response was YES. Maximal size of possible extension queue 235. Compared 62178 event pairs, 1690 based on Foata normal form. 146/8714 useless extension candidates. Maximal degree in co-relation 54277. Up to 3905 conditions per place. [2024-11-28 05:27:49,111 INFO L140 encePairwiseOnDemand]: 27/35 looper letters, 407 selfloop transitions, 86 changer transitions 0/516 dead transitions. [2024-11-28 05:27:49,111 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 281 places, 516 transitions, 8692 flow [2024-11-28 05:27:49,111 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2024-11-28 05:27:49,111 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2024-11-28 05:27:49,112 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 366 transitions. [2024-11-28 05:27:49,112 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.580952380952381 [2024-11-28 05:27:49,112 INFO L175 Difference]: Start difference. First operand has 267 places, 373 transitions, 6106 flow. Second operand 18 states and 366 transitions. [2024-11-28 05:27:49,112 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 281 places, 516 transitions, 8692 flow [2024-11-28 05:27:49,624 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 256 places, 516 transitions, 8501 flow, removed 61 selfloop flow, removed 25 redundant places. [2024-11-28 05:27:49,631 INFO L231 Difference]: Finished difference. Result has 258 places, 359 transitions, 5868 flow [2024-11-28 05:27:49,631 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=35, PETRI_DIFFERENCE_MINUEND_FLOW=5664, PETRI_DIFFERENCE_MINUEND_PLACES=239, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=358, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=85, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=272, PETRI_DIFFERENCE_SUBTRAHEND_STATES=18, PETRI_FLOW=5868, PETRI_PLACES=258, PETRI_TRANSITIONS=359} [2024-11-28 05:27:49,631 INFO L279 CegarLoopForPetriNet]: 36 programPoint places, 222 predicate places. [2024-11-28 05:27:49,632 INFO L471 AbstractCegarLoop]: Abstraction has has 258 places, 359 transitions, 5868 flow [2024-11-28 05:27:49,632 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 14.818181818181818) internal successors, (326), 22 states have internal predecessors, (326), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 05:27:49,632 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-28 05:27:49,632 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 05:27:49,642 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_30f617b7-f0b1-412a-b7a3-a0ccf9358712/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Ended with exit code 0 [2024-11-28 05:27:49,833 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 34 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_30f617b7-f0b1-412a-b7a3-a0ccf9358712/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 05:27:49,833 INFO L396 AbstractCegarLoop]: === Iteration 34 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 11 more)] === [2024-11-28 05:27:49,833 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 05:27:49,833 INFO L85 PathProgramCache]: Analyzing trace with hash -799862621, now seen corresponding path program 1 times [2024-11-28 05:27:49,834 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2024-11-28 05:27:49,834 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [246955339] [2024-11-28 05:27:49,834 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-28 05:27:49,834 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 05:27:49,834 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_30f617b7-f0b1-412a-b7a3-a0ccf9358712/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 05:27:49,835 INFO L229 MonitoredProcess]: Starting monitored process 35 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_30f617b7-f0b1-412a-b7a3-a0ccf9358712/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 05:27:49,836 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_30f617b7-f0b1-412a-b7a3-a0ccf9358712/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Waiting until timeout for monitored process [2024-11-28 05:27:49,913 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2024-11-28 05:27:49,913 INFO L357 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2024-11-28 05:27:49,946 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2024-11-28 05:27:49,986 INFO L130 FreeRefinementEngine]: Strategy FOX found a feasible trace [2024-11-28 05:27:49,986 INFO L340 BasicCegarLoop]: Counterexample is feasible [2024-11-28 05:27:49,987 INFO L782 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_LEAK (13 of 14 remaining) [2024-11-28 05:27:49,989 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (12 of 14 remaining) [2024-11-28 05:27:49,989 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (11 of 14 remaining) [2024-11-28 05:27:49,989 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (10 of 14 remaining) [2024-11-28 05:27:49,990 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (9 of 14 remaining) [2024-11-28 05:27:49,990 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (8 of 14 remaining) [2024-11-28 05:27:49,990 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (7 of 14 remaining) [2024-11-28 05:27:49,990 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr3ASSERT_VIOLATIONMEMORY_LEAK (6 of 14 remaining) [2024-11-28 05:27:49,990 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (5 of 14 remaining) [2024-11-28 05:27:49,990 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (4 of 14 remaining) [2024-11-28 05:27:49,990 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (3 of 14 remaining) [2024-11-28 05:27:49,990 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (2 of 14 remaining) [2024-11-28 05:27:49,991 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (1 of 14 remaining) [2024-11-28 05:27:49,991 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (0 of 14 remaining) [2024-11-28 05:27:50,001 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_30f617b7-f0b1-412a-b7a3-a0ccf9358712/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Ended with exit code 0 [2024-11-28 05:27:50,191 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 35 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_30f617b7-f0b1-412a-b7a3-a0ccf9358712/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 05:27:50,192 INFO L422 BasicCegarLoop]: Path program histogram: [6, 6, 4, 4, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 05:27:50,231 INFO L241 ceAbstractionStarter]: Analysis of concurrent program completed with 1 thread instances [2024-11-28 05:27:50,232 INFO L170 ceAbstractionStarter]: Computing trace abstraction results [2024-11-28 05:27:50,238 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 28.11 05:27:50 BasicIcfg [2024-11-28 05:27:50,238 INFO L131 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2024-11-28 05:27:50,239 INFO L112 PluginConnector]: ------------------------Witness Printer---------------------------- [2024-11-28 05:27:50,239 INFO L270 PluginConnector]: Initializing Witness Printer... [2024-11-28 05:27:50,239 INFO L274 PluginConnector]: Witness Printer initialized [2024-11-28 05:27:50,240 INFO L184 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.11 05:25:51" (3/4) ... [2024-11-28 05:27:50,242 INFO L149 WitnessPrinter]: No result that supports witness generation found [2024-11-28 05:27:50,242 INFO L131 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2024-11-28 05:27:50,243 INFO L158 Benchmark]: Toolchain (without parser) took 119957.03ms. Allocated memory was 117.4MB in the beginning and 2.6GB in the end (delta: 2.4GB). Free memory was 92.1MB in the beginning and 1.9GB in the end (delta: -1.8GB). Peak memory consumption was 585.9MB. Max. memory is 16.1GB. [2024-11-28 05:27:50,243 INFO L158 Benchmark]: CDTParser took 0.45ms. Allocated memory is still 117.4MB. Free memory is still 83.6MB. There was no memory consumed. Max. memory is 16.1GB. [2024-11-28 05:27:50,244 INFO L158 Benchmark]: CACSL2BoogieTranslator took 380.67ms. Allocated memory is still 117.4MB. Free memory was 91.9MB in the beginning and 79.4MB in the end (delta: 12.5MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. [2024-11-28 05:27:50,244 INFO L158 Benchmark]: Boogie Procedure Inliner took 65.91ms. Allocated memory is still 117.4MB. Free memory was 79.4MB in the beginning and 77.8MB in the end (delta: 1.6MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. [2024-11-28 05:27:50,244 INFO L158 Benchmark]: Boogie Preprocessor took 64.29ms. Allocated memory is still 117.4MB. Free memory was 77.8MB in the beginning and 75.5MB in the end (delta: 2.3MB). There was no memory consumed. Max. memory is 16.1GB. [2024-11-28 05:27:50,244 INFO L158 Benchmark]: RCFGBuilder took 1026.45ms. Allocated memory is still 117.4MB. Free memory was 75.5MB in the beginning and 63.4MB in the end (delta: 12.1MB). Peak memory consumption was 37.6MB. Max. memory is 16.1GB. [2024-11-28 05:27:50,245 INFO L158 Benchmark]: TraceAbstraction took 118408.70ms. Allocated memory was 117.4MB in the beginning and 2.6GB in the end (delta: 2.4GB). Free memory was 62.9MB in the beginning and 1.9GB in the end (delta: -1.9GB). Peak memory consumption was 548.3MB. Max. memory is 16.1GB. [2024-11-28 05:27:50,245 INFO L158 Benchmark]: Witness Printer took 3.52ms. Allocated memory is still 2.6GB. Free memory was 1.9GB in the beginning and 1.9GB in the end (delta: 760.4kB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. [2024-11-28 05:27:50,249 INFO L338 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.45ms. Allocated memory is still 117.4MB. Free memory is still 83.6MB. There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 380.67ms. Allocated memory is still 117.4MB. Free memory was 91.9MB in the beginning and 79.4MB in the end (delta: 12.5MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 65.91ms. Allocated memory is still 117.4MB. Free memory was 79.4MB in the beginning and 77.8MB in the end (delta: 1.6MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. * Boogie Preprocessor took 64.29ms. Allocated memory is still 117.4MB. Free memory was 77.8MB in the beginning and 75.5MB in the end (delta: 2.3MB). There was no memory consumed. Max. memory is 16.1GB. * RCFGBuilder took 1026.45ms. Allocated memory is still 117.4MB. Free memory was 75.5MB in the beginning and 63.4MB in the end (delta: 12.1MB). Peak memory consumption was 37.6MB. Max. memory is 16.1GB. * TraceAbstraction took 118408.70ms. Allocated memory was 117.4MB in the beginning and 2.6GB in the end (delta: 2.4GB). Free memory was 62.9MB in the beginning and 1.9GB in the end (delta: -1.9GB). Peak memory consumption was 548.3MB. Max. memory is 16.1GB. * Witness Printer took 3.52ms. Allocated memory is still 2.6GB. Free memory was 1.9GB in the beginning and 1.9GB in the end (delta: 760.4kB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - UnprovableResult [Line: 21]: Unable to prove that all allocated memory was freed Unable to prove that all allocated memory was freed Reason: overapproximation of memtrack at line 21. Possible FailurePath: [L39] 0 int* A; [L40] 0 _Atomic int counter; [L41] 0 int N; [L66] 0 pthread_t t1, t2; [L68] 0 N = __VERIFIER_nondet_int() [L69] CALL, EXPR 0 create_fresh_int_array(N) [L84] CALL 0 assume_abort_if_not(size >= 0) [L36] COND FALSE 0 !(!cond) [L84] RET 0 assume_abort_if_not(size >= 0) [L85] CALL 0 assume_abort_if_not(size <= (((size_t) 4294967295) / sizeof(int))) [L36] COND FALSE 0 !(!cond) [L85] RET 0 assume_abort_if_not(size <= (((size_t) 4294967295) / sizeof(int))) [L87] 0 int* arr = (int*)malloc(sizeof(int) * (size_t)size); [L88] 0 int i = 0; VAL [A={0:0}, N=1, \old(size)=1, arr={3:0}, counter=0, i=0, size=1] [L88] COND TRUE 0 i < size [L89] 0 arr[i] = __VERIFIER_nondet_int() [L88] 0 i++ VAL [A={0:0}, N=1, \old(size)=1, arr={3:0}, counter=0, i=1, size=1] [L88] COND FALSE 0 !(i < size) [L91] 0 return arr; [L69] RET, EXPR 0 create_fresh_int_array(N) [L69] 0 A = create_fresh_int_array(N) [L72] FCALL, FORK 0 pthread_create(&t1, 0, thread1, 0) VAL [A={3:0}, N=1, counter=0, t1=0] [L73] FCALL, FORK 0 pthread_create(&t2, 0, thread2, 0) VAL [A={3:0}, N=1, counter=0, t1=0, t2=1] [L48] 1 int i=0; VAL [A={3:0}, N=1, \old(_argptr)={0:0}, _argptr={0:0}, counter=0, i=0] [L48] COND TRUE 1 i= 0 || a >= -2147483648 - b) [L36] COND FALSE 1 !(!cond) [L101] RET 1 assume_abort_if_not(b >= 0 || a >= -2147483648 - b) [L102] CALL 1 assume_abort_if_not(b <= 0 || a <= 2147483647 - b) [L36] COND FALSE 1 !(!cond) [L102] RET 1 assume_abort_if_not(b <= 0 || a <= 2147483647 - b) [L103] 1 return a + b; [L49] RET, EXPR 1 plus(counter, A[i]) [L49] 1 int tmp = plus(counter, A[i]); [L57] 2 int i=0; VAL [A={3:0}, N=1, \old(_argptr)={0:0}, _argptr={0:0}, counter=0, i=0] [L57] COND TRUE 2 i= b - 2147483648) [L36] COND FALSE 2 !(!cond) [L95] RET 2 assume_abort_if_not(b <= 0 || a >= b - 2147483648) [L96] CALL 2 assume_abort_if_not(b >= 0 || a <= b + 2147483647) [L36] COND FALSE 2 !(!cond) [L96] RET 2 assume_abort_if_not(b >= 0 || a <= b + 2147483647) [L97] 2 return a - b; [L58] RET, EXPR 2 minus(counter, A[i]) [L58] 2 int tmp = minus(counter, A[i]); [L50] 1 counter = tmp VAL [A={3:0}, N=1, \old(_argptr)={0:0}, _argptr={0:0}, counter=1, i=0, tmp=1] [L59] 2 counter = tmp VAL [A={3:0}, N=1, \old(_argptr)={0:0}, _argptr={0:0}, counter=-1, i=0, tmp=-1] [L57] 2 i++ VAL [A={3:0}, N=1, \old(_argptr)={0:0}, _argptr={0:0}, counter=-1, i=1] [L48] 1 i++ VAL [A={3:0}, N=1, \old(_argptr)={0:0}, _argptr={0:0}, counter=-1, i=1] [L48] COND FALSE 1 !(i