./Ultimate.py --spec ../../sv-benchmarks/c/properties/valid-memsafety.prp --file ../../sv-benchmarks/c/weaver/popl20-more-mts.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_69af3446-2b85-43dc-afa3-7a7b4be75141/bin/uautomizer-verify-aQ6SnzHsRB/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_69af3446-2b85-43dc-afa3-7a7b4be75141/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_69af3446-2b85-43dc-afa3-7a7b4be75141/bin/uautomizer-verify-aQ6SnzHsRB/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_69af3446-2b85-43dc-afa3-7a7b4be75141/bin/uautomizer-verify-aQ6SnzHsRB/config/AutomizerMemDerefMemtrack.xml -i ../../sv-benchmarks/c/weaver/popl20-more-mts.wvr.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_69af3446-2b85-43dc-afa3-7a7b4be75141/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_69af3446-2b85-43dc-afa3-7a7b4be75141/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 cc67bee348fb2ffff05c0616660a93fb872177c05d08813d910a29641aea282e --- Real Ultimate output --- This is Ultimate 0.3.0-dev-d790fec [2024-11-28 05:21:16,187 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-11-28 05:21:16,257 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_69af3446-2b85-43dc-afa3-7a7b4be75141/bin/uautomizer-verify-aQ6SnzHsRB/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2024-11-28 05:21:16,263 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-11-28 05:21:16,263 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-11-28 05:21:16,299 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-11-28 05:21:16,299 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-11-28 05:21:16,299 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-11-28 05:21:16,300 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-11-28 05:21:16,300 INFO L153 SettingsManager]: * Use memory slicer=true [2024-11-28 05:21:16,300 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-11-28 05:21:16,300 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-11-28 05:21:16,300 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-11-28 05:21:16,300 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-11-28 05:21:16,301 INFO L153 SettingsManager]: * Use SBE=true [2024-11-28 05:21:16,302 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-11-28 05:21:16,302 INFO L153 SettingsManager]: * sizeof long=4 [2024-11-28 05:21:16,302 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-11-28 05:21:16,303 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-11-28 05:21:16,303 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-11-28 05:21:16,303 INFO L153 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2024-11-28 05:21:16,303 INFO L153 SettingsManager]: * Bitprecise bitfields=true [2024-11-28 05:21:16,304 INFO L153 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2024-11-28 05:21:16,304 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-11-28 05:21:16,304 INFO L153 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2024-11-28 05:21:16,304 INFO L153 SettingsManager]: * Check unreachability of reach_error function=false [2024-11-28 05:21:16,304 INFO L153 SettingsManager]: * sizeof long double=12 [2024-11-28 05:21:16,304 INFO L153 SettingsManager]: * Behaviour of calls to undefined functions=OVERAPPROXIMATE_BEHAVIOUR [2024-11-28 05:21:16,304 INFO L153 SettingsManager]: * Use constant arrays=true [2024-11-28 05:21:16,305 INFO L151 SettingsManager]: Preferences of IcfgBuilder differ from their defaults: [2024-11-28 05:21:16,305 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-11-28 05:21:16,305 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-11-28 05:21:16,305 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-11-28 05:21:16,305 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-11-28 05:21:16,306 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-11-28 05:21:16,306 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-11-28 05:21:16,306 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-11-28 05:21:16,306 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-11-28 05:21:16,306 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-11-28 05:21:16,306 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-11-28 05:21:16,306 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-11-28 05:21:16,306 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-11-28 05:21:16,306 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-11-28 05:21:16,306 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-11-28 05:21:16,306 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-11-28 05:21:16,307 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-11-28 05:21:16,307 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-11-28 05:21:16,307 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_69af3446-2b85-43dc-afa3-7a7b4be75141/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 -> cc67bee348fb2ffff05c0616660a93fb872177c05d08813d910a29641aea282e [2024-11-28 05:21:16,620 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-11-28 05:21:16,629 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-11-28 05:21:16,631 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-11-28 05:21:16,633 INFO L270 PluginConnector]: Initializing CDTParser... [2024-11-28 05:21:16,633 INFO L274 PluginConnector]: CDTParser initialized [2024-11-28 05:21:16,634 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_69af3446-2b85-43dc-afa3-7a7b4be75141/bin/uautomizer-verify-aQ6SnzHsRB/../../sv-benchmarks/c/weaver/popl20-more-mts.wvr.c [2024-11-28 05:21:19,672 INFO L533 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_69af3446-2b85-43dc-afa3-7a7b4be75141/bin/uautomizer-verify-aQ6SnzHsRB/data/d00e61c78/e9910accaed74eea872e460e0a28de7c/FLAG588d63e41 [2024-11-28 05:21:19,992 INFO L384 CDTParser]: Found 1 translation units. [2024-11-28 05:21:19,992 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_69af3446-2b85-43dc-afa3-7a7b4be75141/sv-benchmarks/c/weaver/popl20-more-mts.wvr.c [2024-11-28 05:21:20,020 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_69af3446-2b85-43dc-afa3-7a7b4be75141/bin/uautomizer-verify-aQ6SnzHsRB/data/d00e61c78/e9910accaed74eea872e460e0a28de7c/FLAG588d63e41 [2024-11-28 05:21:20,063 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_69af3446-2b85-43dc-afa3-7a7b4be75141/bin/uautomizer-verify-aQ6SnzHsRB/data/d00e61c78/e9910accaed74eea872e460e0a28de7c [2024-11-28 05:21:20,066 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-11-28 05:21:20,069 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2024-11-28 05:21:20,071 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-11-28 05:21:20,072 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-11-28 05:21:20,077 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-11-28 05:21:20,078 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.11 05:21:20" (1/1) ... [2024-11-28 05:21:20,078 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7429e089 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 05:21:20, skipping insertion in model container [2024-11-28 05:21:20,079 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.11 05:21:20" (1/1) ... [2024-11-28 05:21:20,099 INFO L175 MainTranslator]: Built tables and reachable declarations [2024-11-28 05:21:20,318 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 05:21:20,325 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-28 05:21:20,341 INFO L200 MainTranslator]: Completed pre-run [2024-11-28 05:21:20,386 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-28 05:21:20,409 INFO L204 MainTranslator]: Completed translation [2024-11-28 05:21:20,409 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 05:21:20 WrapperNode [2024-11-28 05:21:20,410 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-11-28 05:21:20,411 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-11-28 05:21:20,412 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-11-28 05:21:20,413 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-11-28 05:21:20,423 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 05:21:20" (1/1) ... [2024-11-28 05:21:20,430 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 05:21:20" (1/1) ... [2024-11-28 05:21:20,474 INFO L138 Inliner]: procedures = 24, calls = 32, calls flagged for inlining = 14, calls inlined = 20, statements flattened = 214 [2024-11-28 05:21:20,475 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-11-28 05:21:20,475 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-11-28 05:21:20,475 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-11-28 05:21:20,476 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-11-28 05:21:20,485 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 05:21:20" (1/1) ... [2024-11-28 05:21:20,485 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 05:21:20" (1/1) ... [2024-11-28 05:21:20,488 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 05:21:20" (1/1) ... [2024-11-28 05:21:20,504 INFO L175 MemorySlicer]: Split 10 memory accesses to 2 slices as follows [2, 8]. 80 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 05:21:20,504 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 05:21:20" (1/1) ... [2024-11-28 05:21:20,504 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 05:21:20" (1/1) ... [2024-11-28 05:21:20,512 INFO L184 PluginConnector]: Executing the observer ReplaceArrayAssignments from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 05:21:20" (1/1) ... [2024-11-28 05:21:20,513 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 05:21:20" (1/1) ... [2024-11-28 05:21:20,517 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 05:21:20" (1/1) ... [2024-11-28 05:21:20,519 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 05:21:20" (1/1) ... [2024-11-28 05:21:20,520 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 05:21:20" (1/1) ... [2024-11-28 05:21:20,523 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-11-28 05:21:20,523 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-11-28 05:21:20,523 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-11-28 05:21:20,524 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-11-28 05:21:20,525 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 05:21:20" (1/1) ... [2024-11-28 05:21:20,530 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-11-28 05:21:20,545 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_69af3446-2b85-43dc-afa3-7a7b4be75141/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 05:21:20,561 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_69af3446-2b85-43dc-afa3-7a7b4be75141/bin/uautomizer-verify-aQ6SnzHsRB/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (exit command is (exit), workingDir is null) [2024-11-28 05:21:20,566 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_69af3446-2b85-43dc-afa3-7a7b4be75141/bin/uautomizer-verify-aQ6SnzHsRB/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Waiting until timeout for monitored process [2024-11-28 05:21:20,585 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-11-28 05:21:20,586 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2024-11-28 05:21:20,586 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2024-11-28 05:21:20,586 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2024-11-28 05:21:20,586 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2024-11-28 05:21:20,586 INFO L130 BoogieDeclarations]: Found specification of procedure thread3 [2024-11-28 05:21:20,586 INFO L138 BoogieDeclarations]: Found implementation of procedure thread3 [2024-11-28 05:21:20,586 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-11-28 05:21:20,586 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#1 [2024-11-28 05:21:20,586 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#0 [2024-11-28 05:21:20,586 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#1 [2024-11-28 05:21:20,586 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2024-11-28 05:21:20,586 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2024-11-28 05:21:20,586 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2024-11-28 05:21:20,587 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-11-28 05:21:20,587 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-11-28 05:21:20,587 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#0 [2024-11-28 05:21:20,587 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#1 [2024-11-28 05:21:20,588 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 05:21:20,701 INFO L234 CfgBuilder]: Building ICFG [2024-11-28 05:21:20,703 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2024-11-28 05:21:21,282 INFO L279 CfgBuilder]: Omitted future-live optimization because the input is a concurrent program. [2024-11-28 05:21:21,283 INFO L283 CfgBuilder]: Performing block encoding [2024-11-28 05:21:21,877 INFO L307 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-11-28 05:21:21,879 INFO L312 CfgBuilder]: Removed 4 assume(true) statements. [2024-11-28 05:21:21,879 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.11 05:21:21 BoogieIcfgContainer [2024-11-28 05:21:21,880 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-11-28 05:21:21,882 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-11-28 05:21:21,883 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-11-28 05:21:21,889 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-11-28 05:21:21,889 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 28.11 05:21:20" (1/3) ... [2024-11-28 05:21:21,890 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2eb53245 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 28.11 05:21:21, skipping insertion in model container [2024-11-28 05:21:21,890 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 05:21:20" (2/3) ... [2024-11-28 05:21:21,891 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2eb53245 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 28.11 05:21:21, skipping insertion in model container [2024-11-28 05:21:21,891 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.11 05:21:21" (3/3) ... [2024-11-28 05:21:21,893 INFO L128 eAbstractionObserver]: Analyzing ICFG popl20-more-mts.wvr.c [2024-11-28 05:21:21,909 INFO L216 ceAbstractionStarter]: Automizer settings: Hoare:None NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-11-28 05:21:21,911 INFO L151 ceAbstractionStarter]: Applying trace abstraction to ICFG popl20-more-mts.wvr.c that has 4 procedures, 53 locations, 1 initial locations, 4 loop locations, and 18 error locations. [2024-11-28 05:21:21,911 INFO L491 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2024-11-28 05:21:22,018 INFO L143 ThreadInstanceAdder]: Constructed 3 joinOtherThreadTransitions. [2024-11-28 05:21:22,064 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 62 places, 58 transitions, 137 flow [2024-11-28 05:21:22,123 INFO L124 PetriNetUnfolderBase]: 6/55 cut-off events. [2024-11-28 05:21:22,127 INFO L125 PetriNetUnfolderBase]: For 3/3 co-relation queries the response was YES. [2024-11-28 05:21:22,132 INFO L83 FinitePrefix]: Finished finitePrefix Result has 68 conditions, 55 events. 6/55 cut-off events. For 3/3 co-relation queries the response was YES. Maximal size of possible extension queue 11. Compared 150 event pairs, 0 based on Foata normal form. 0/31 useless extension candidates. Maximal degree in co-relation 44. Up to 2 conditions per place. [2024-11-28 05:21:22,133 INFO L82 GeneralOperation]: Start removeDead. Operand has 62 places, 58 transitions, 137 flow [2024-11-28 05:21:22,137 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 58 places, 54 transitions, 126 flow [2024-11-28 05:21:22,149 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-11-28 05:21:22,170 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;@3b85e3f7, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-11-28 05:21:22,170 INFO L334 AbstractCegarLoop]: Starting to check reachability of 35 error locations. [2024-11-28 05:21:22,175 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2024-11-28 05:21:22,176 INFO L124 PetriNetUnfolderBase]: 1/4 cut-off events. [2024-11-28 05:21:22,176 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-11-28 05:21:22,176 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-28 05:21:22,177 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2024-11-28 05:21:22,177 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 32 more)] === [2024-11-28 05:21:22,183 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 05:21:22,183 INFO L85 PathProgramCache]: Analyzing trace with hash 725392, now seen corresponding path program 1 times [2024-11-28 05:21:22,192 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 05:21:22,192 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [217064770] [2024-11-28 05:21:22,193 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-28 05:21:22,193 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 05:21:22,295 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 05:21:22,460 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 05:21:22,461 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 05:21:22,461 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [217064770] [2024-11-28 05:21:22,462 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [217064770] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-28 05:21:22,464 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-28 05:21:22,465 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2024-11-28 05:21:22,466 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1211511963] [2024-11-28 05:21:22,467 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-28 05:21:22,474 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-28 05:21:22,480 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 05:21:22,506 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-28 05:21:22,506 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-28 05:21:22,529 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 19 out of 58 [2024-11-28 05:21:22,531 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 58 places, 54 transitions, 126 flow. Second operand has 3 states, 3 states have (on average 20.0) internal successors, (60), 3 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 05:21:22,532 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-28 05:21:22,532 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 19 of 58 [2024-11-28 05:21:22,533 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-28 05:21:23,095 INFO L124 PetriNetUnfolderBase]: 1076/1555 cut-off events. [2024-11-28 05:21:23,095 INFO L125 PetriNetUnfolderBase]: For 106/106 co-relation queries the response was YES. [2024-11-28 05:21:23,103 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3136 conditions, 1555 events. 1076/1555 cut-off events. For 106/106 co-relation queries the response was YES. Maximal size of possible extension queue 101. Compared 6518 event pairs, 723 based on Foata normal form. 1/1410 useless extension candidates. Maximal degree in co-relation 2860. Up to 1475 conditions per place. [2024-11-28 05:21:23,123 INFO L140 encePairwiseOnDemand]: 50/58 looper letters, 30 selfloop transitions, 2 changer transitions 0/47 dead transitions. [2024-11-28 05:21:23,124 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 53 places, 47 transitions, 176 flow [2024-11-28 05:21:23,125 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-28 05:21:23,128 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-11-28 05:21:23,137 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 95 transitions. [2024-11-28 05:21:23,138 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.5459770114942529 [2024-11-28 05:21:23,140 INFO L175 Difference]: Start difference. First operand has 58 places, 54 transitions, 126 flow. Second operand 3 states and 95 transitions. [2024-11-28 05:21:23,141 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 53 places, 47 transitions, 176 flow [2024-11-28 05:21:23,147 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 47 places, 47 transitions, 164 flow, removed 0 selfloop flow, removed 6 redundant places. [2024-11-28 05:21:23,150 INFO L231 Difference]: Finished difference. Result has 47 places, 47 transitions, 104 flow [2024-11-28 05:21:23,153 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=58, PETRI_DIFFERENCE_MINUEND_FLOW=100, PETRI_DIFFERENCE_MINUEND_PLACES=45, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=47, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=45, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=104, PETRI_PLACES=47, PETRI_TRANSITIONS=47} [2024-11-28 05:21:23,157 INFO L279 CegarLoopForPetriNet]: 58 programPoint places, -11 predicate places. [2024-11-28 05:21:23,157 INFO L471 AbstractCegarLoop]: Abstraction has has 47 places, 47 transitions, 104 flow [2024-11-28 05:21:23,157 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 20.0) internal successors, (60), 3 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 05:21:23,157 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-28 05:21:23,157 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2024-11-28 05:21:23,158 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-11-28 05:21:23,158 INFO L396 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 32 more)] === [2024-11-28 05:21:23,158 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 05:21:23,158 INFO L85 PathProgramCache]: Analyzing trace with hash 725393, now seen corresponding path program 1 times [2024-11-28 05:21:23,159 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 05:21:23,159 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1910617060] [2024-11-28 05:21:23,159 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-28 05:21:23,159 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 05:21:23,216 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 05:21:23,590 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 05:21:23,590 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 05:21:23,590 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1910617060] [2024-11-28 05:21:23,590 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1910617060] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-28 05:21:23,590 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-28 05:21:23,590 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-11-28 05:21:23,590 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1079849674] [2024-11-28 05:21:23,591 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-28 05:21:23,591 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-28 05:21:23,592 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 05:21:23,592 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-28 05:21:23,592 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-11-28 05:21:23,622 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 19 out of 58 [2024-11-28 05:21:23,622 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 47 places, 47 transitions, 104 flow. Second operand has 4 states, 4 states have (on average 19.75) internal successors, (79), 4 states have internal predecessors, (79), 0 states have call successors, (0), 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 05:21:23,623 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-28 05:21:23,623 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 19 of 58 [2024-11-28 05:21:23,623 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-28 05:21:24,146 INFO L124 PetriNetUnfolderBase]: 1077/1558 cut-off events. [2024-11-28 05:21:24,146 INFO L125 PetriNetUnfolderBase]: For 26/26 co-relation queries the response was YES. [2024-11-28 05:21:24,152 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3076 conditions, 1558 events. 1077/1558 cut-off events. For 26/26 co-relation queries the response was YES. Maximal size of possible extension queue 101. Compared 6532 event pairs, 723 based on Foata normal form. 0/1412 useless extension candidates. Maximal degree in co-relation 3054. Up to 1480 conditions per place. [2024-11-28 05:21:24,161 INFO L140 encePairwiseOnDemand]: 53/58 looper letters, 32 selfloop transitions, 4 changer transitions 0/50 dead transitions. [2024-11-28 05:21:24,161 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 50 places, 50 transitions, 184 flow [2024-11-28 05:21:24,163 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-11-28 05:21:24,163 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-11-28 05:21:24,164 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 113 transitions. [2024-11-28 05:21:24,164 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.4870689655172414 [2024-11-28 05:21:24,164 INFO L175 Difference]: Start difference. First operand has 47 places, 47 transitions, 104 flow. Second operand 4 states and 113 transitions. [2024-11-28 05:21:24,164 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 50 places, 50 transitions, 184 flow [2024-11-28 05:21:24,165 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 48 places, 50 transitions, 178 flow, removed 0 selfloop flow, removed 2 redundant places. [2024-11-28 05:21:24,169 INFO L231 Difference]: Finished difference. Result has 50 places, 50 transitions, 127 flow [2024-11-28 05:21:24,169 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=58, PETRI_DIFFERENCE_MINUEND_FLOW=100, PETRI_DIFFERENCE_MINUEND_PLACES=45, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=47, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=43, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=127, PETRI_PLACES=50, PETRI_TRANSITIONS=50} [2024-11-28 05:21:24,170 INFO L279 CegarLoopForPetriNet]: 58 programPoint places, -8 predicate places. [2024-11-28 05:21:24,171 INFO L471 AbstractCegarLoop]: Abstraction has has 50 places, 50 transitions, 127 flow [2024-11-28 05:21:24,171 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 19.75) internal successors, (79), 4 states have internal predecessors, (79), 0 states have call successors, (0), 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 05:21:24,172 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-28 05:21:24,172 INFO L206 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1] [2024-11-28 05:21:24,173 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-11-28 05:21:24,173 INFO L396 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 32 more)] === [2024-11-28 05:21:24,173 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 05:21:24,174 INFO L85 PathProgramCache]: Analyzing trace with hash 697126536, now seen corresponding path program 1 times [2024-11-28 05:21:24,174 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 05:21:24,175 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2111484010] [2024-11-28 05:21:24,175 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-28 05:21:24,175 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 05:21:24,214 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 05:21:24,646 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 05:21:24,647 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 05:21:24,647 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2111484010] [2024-11-28 05:21:24,647 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2111484010] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-28 05:21:24,648 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1944437519] [2024-11-28 05:21:24,648 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-28 05:21:24,648 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 05:21:24,648 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_69af3446-2b85-43dc-afa3-7a7b4be75141/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 05:21:24,656 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_69af3446-2b85-43dc-afa3-7a7b4be75141/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 05:21:24,657 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_69af3446-2b85-43dc-afa3-7a7b4be75141/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2024-11-28 05:21:24,740 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 05:21:24,742 INFO L256 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 21 conjuncts are in the unsatisfiable core [2024-11-28 05:21:24,747 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 05:21:24,829 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 05:21:25,135 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 05:21:25,135 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-28 05:21:25,283 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 05:21:25,284 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1944437519] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-28 05:21:25,284 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-28 05:21:25,284 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 9 [2024-11-28 05:21:25,284 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1722510939] [2024-11-28 05:21:25,284 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-28 05:21:25,284 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-11-28 05:21:25,284 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 05:21:25,285 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-11-28 05:21:25,285 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=76, Unknown=0, NotChecked=0, Total=110 [2024-11-28 05:21:25,443 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 19 out of 58 [2024-11-28 05:21:25,443 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 50 places, 50 transitions, 127 flow. Second operand has 11 states, 11 states have (on average 20.363636363636363) internal successors, (224), 11 states have internal predecessors, (224), 0 states have call successors, (0), 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 05:21:25,443 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-28 05:21:25,443 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 19 of 58 [2024-11-28 05:21:25,443 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-28 05:21:25,992 INFO L124 PetriNetUnfolderBase]: 1078/1560 cut-off events. [2024-11-28 05:21:25,992 INFO L125 PetriNetUnfolderBase]: For 26/26 co-relation queries the response was YES. [2024-11-28 05:21:25,995 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3092 conditions, 1560 events. 1078/1560 cut-off events. For 26/26 co-relation queries the response was YES. Maximal size of possible extension queue 101. Compared 6532 event pairs, 723 based on Foata normal form. 0/1413 useless extension candidates. Maximal degree in co-relation 3061. Up to 1477 conditions per place. [2024-11-28 05:21:26,004 INFO L140 encePairwiseOnDemand]: 53/58 looper letters, 28 selfloop transitions, 10 changer transitions 0/52 dead transitions. [2024-11-28 05:21:26,004 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 56 places, 52 transitions, 211 flow [2024-11-28 05:21:26,005 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-11-28 05:21:26,005 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-11-28 05:21:26,006 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 192 transitions. [2024-11-28 05:21:26,008 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.41379310344827586 [2024-11-28 05:21:26,008 INFO L175 Difference]: Start difference. First operand has 50 places, 50 transitions, 127 flow. Second operand 8 states and 192 transitions. [2024-11-28 05:21:26,008 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 56 places, 52 transitions, 211 flow [2024-11-28 05:21:26,009 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 55 places, 52 transitions, 208 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-11-28 05:21:26,010 INFO L231 Difference]: Finished difference. Result has 55 places, 52 transitions, 152 flow [2024-11-28 05:21:26,010 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=58, PETRI_DIFFERENCE_MINUEND_FLOW=120, PETRI_DIFFERENCE_MINUEND_PLACES=48, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=49, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=42, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=152, PETRI_PLACES=55, PETRI_TRANSITIONS=52} [2024-11-28 05:21:26,013 INFO L279 CegarLoopForPetriNet]: 58 programPoint places, -3 predicate places. [2024-11-28 05:21:26,013 INFO L471 AbstractCegarLoop]: Abstraction has has 55 places, 52 transitions, 152 flow [2024-11-28 05:21:26,013 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 20.363636363636363) internal successors, (224), 11 states have internal predecessors, (224), 0 states have call successors, (0), 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 05:21:26,013 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-28 05:21:26,014 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1] [2024-11-28 05:21:26,024 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_69af3446-2b85-43dc-afa3-7a7b4be75141/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2024-11-28 05:21:26,218 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_69af3446-2b85-43dc-afa3-7a7b4be75141/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 05:21:26,218 INFO L396 AbstractCegarLoop]: === Iteration 4 === Targeting thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 32 more)] === [2024-11-28 05:21:26,219 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 05:21:26,219 INFO L85 PathProgramCache]: Analyzing trace with hash 138966992, now seen corresponding path program 1 times [2024-11-28 05:21:26,219 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 05:21:26,219 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1249228849] [2024-11-28 05:21:26,219 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-28 05:21:26,219 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 05:21:26,230 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 05:21:26,309 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 05:21:26,309 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 05:21:26,309 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1249228849] [2024-11-28 05:21:26,309 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1249228849] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-28 05:21:26,309 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-28 05:21:26,309 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-11-28 05:21:26,309 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1238872812] [2024-11-28 05:21:26,310 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-28 05:21:26,310 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-28 05:21:26,310 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 05:21:26,310 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-28 05:21:26,310 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-11-28 05:21:26,344 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 58 [2024-11-28 05:21:26,345 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 55 places, 52 transitions, 152 flow. Second operand has 4 states, 4 states have (on average 16.25) internal successors, (65), 4 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 05:21:26,345 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-28 05:21:26,345 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 58 [2024-11-28 05:21:26,345 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-28 05:21:26,604 INFO L124 PetriNetUnfolderBase]: 921/1335 cut-off events. [2024-11-28 05:21:26,604 INFO L125 PetriNetUnfolderBase]: For 21/21 co-relation queries the response was YES. [2024-11-28 05:21:26,607 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2662 conditions, 1335 events. 921/1335 cut-off events. For 21/21 co-relation queries the response was YES. Maximal size of possible extension queue 82. Compared 5372 event pairs, 608 based on Foata normal form. 0/1256 useless extension candidates. Maximal degree in co-relation 2624. Up to 1263 conditions per place. [2024-11-28 05:21:26,614 INFO L140 encePairwiseOnDemand]: 51/58 looper letters, 33 selfloop transitions, 4 changer transitions 0/47 dead transitions. [2024-11-28 05:21:26,614 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 53 places, 47 transitions, 216 flow [2024-11-28 05:21:26,614 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-11-28 05:21:26,614 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-11-28 05:21:26,615 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 96 transitions. [2024-11-28 05:21:26,616 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.41379310344827586 [2024-11-28 05:21:26,616 INFO L175 Difference]: Start difference. First operand has 55 places, 52 transitions, 152 flow. Second operand 4 states and 96 transitions. [2024-11-28 05:21:26,616 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 53 places, 47 transitions, 216 flow [2024-11-28 05:21:26,618 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 46 places, 47 transitions, 174 flow, removed 6 selfloop flow, removed 7 redundant places. [2024-11-28 05:21:26,619 INFO L231 Difference]: Finished difference. Result has 46 places, 47 transitions, 108 flow [2024-11-28 05:21:26,619 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=58, PETRI_DIFFERENCE_MINUEND_FLOW=100, PETRI_DIFFERENCE_MINUEND_PLACES=43, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=47, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=43, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=108, PETRI_PLACES=46, PETRI_TRANSITIONS=47} [2024-11-28 05:21:26,620 INFO L279 CegarLoopForPetriNet]: 58 programPoint places, -12 predicate places. [2024-11-28 05:21:26,620 INFO L471 AbstractCegarLoop]: Abstraction has has 46 places, 47 transitions, 108 flow [2024-11-28 05:21:26,620 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 16.25) internal successors, (65), 4 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 05:21:26,620 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-28 05:21:26,620 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1] [2024-11-28 05:21:26,620 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2024-11-28 05:21:26,620 INFO L396 AbstractCegarLoop]: === Iteration 5 === Targeting thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 32 more)] === [2024-11-28 05:21:26,622 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 05:21:26,622 INFO L85 PathProgramCache]: Analyzing trace with hash 138966993, now seen corresponding path program 1 times [2024-11-28 05:21:26,622 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 05:21:26,622 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1961873524] [2024-11-28 05:21:26,623 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-28 05:21:26,623 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 05:21:26,640 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 05:21:26,735 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 05:21:26,736 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 05:21:26,736 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1961873524] [2024-11-28 05:21:26,736 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1961873524] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-28 05:21:26,736 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-28 05:21:26,736 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-11-28 05:21:26,736 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1463052699] [2024-11-28 05:21:26,736 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-28 05:21:26,736 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-28 05:21:26,737 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 05:21:26,737 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-28 05:21:26,737 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-28 05:21:26,747 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 20 out of 58 [2024-11-28 05:21:26,748 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 46 places, 47 transitions, 108 flow. Second operand has 3 states, 3 states have (on average 21.333333333333332) internal successors, (64), 3 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 05:21:26,748 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-28 05:21:26,748 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 20 of 58 [2024-11-28 05:21:26,748 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-28 05:21:26,963 INFO L124 PetriNetUnfolderBase]: 920/1334 cut-off events. [2024-11-28 05:21:26,963 INFO L125 PetriNetUnfolderBase]: For 21/21 co-relation queries the response was YES. [2024-11-28 05:21:26,965 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2640 conditions, 1334 events. 920/1334 cut-off events. For 21/21 co-relation queries the response was YES. Maximal size of possible extension queue 82. Compared 5384 event pairs, 608 based on Foata normal form. 1/1258 useless extension candidates. Maximal degree in co-relation 2616. Up to 1268 conditions per place. [2024-11-28 05:21:26,972 INFO L140 encePairwiseOnDemand]: 55/58 looper letters, 34 selfloop transitions, 2 changer transitions 0/46 dead transitions. [2024-11-28 05:21:26,972 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 48 places, 46 transitions, 176 flow [2024-11-28 05:21:26,973 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-28 05:21:26,976 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-11-28 05:21:26,976 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 94 transitions. [2024-11-28 05:21:26,976 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.5402298850574713 [2024-11-28 05:21:26,977 INFO L175 Difference]: Start difference. First operand has 46 places, 47 transitions, 108 flow. Second operand 3 states and 94 transitions. [2024-11-28 05:21:26,977 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 48 places, 46 transitions, 176 flow [2024-11-28 05:21:26,977 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 46 places, 46 transitions, 172 flow, removed 0 selfloop flow, removed 2 redundant places. [2024-11-28 05:21:26,978 INFO L231 Difference]: Finished difference. Result has 46 places, 46 transitions, 104 flow [2024-11-28 05:21:26,978 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=58, PETRI_DIFFERENCE_MINUEND_FLOW=100, PETRI_DIFFERENCE_MINUEND_PLACES=44, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=46, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=44, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=104, PETRI_PLACES=46, PETRI_TRANSITIONS=46} [2024-11-28 05:21:26,979 INFO L279 CegarLoopForPetriNet]: 58 programPoint places, -12 predicate places. [2024-11-28 05:21:26,979 INFO L471 AbstractCegarLoop]: Abstraction has has 46 places, 46 transitions, 104 flow [2024-11-28 05:21:26,979 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 21.333333333333332) internal successors, (64), 3 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 05:21:26,979 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-28 05:21:26,979 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 05:21:26,980 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2024-11-28 05:21:26,980 INFO L396 AbstractCegarLoop]: === Iteration 6 === Targeting thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 32 more)] === [2024-11-28 05:21:26,980 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 05:21:26,980 INFO L85 PathProgramCache]: Analyzing trace with hash 1933378426, now seen corresponding path program 1 times [2024-11-28 05:21:26,980 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 05:21:26,980 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1311843952] [2024-11-28 05:21:26,980 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-28 05:21:26,980 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 05:21:27,005 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 05:21:27,266 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-28 05:21:27,266 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 05:21:27,266 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1311843952] [2024-11-28 05:21:27,266 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1311843952] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-28 05:21:27,266 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1996674294] [2024-11-28 05:21:27,266 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-28 05:21:27,267 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 05:21:27,267 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_69af3446-2b85-43dc-afa3-7a7b4be75141/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 05:21:27,269 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_69af3446-2b85-43dc-afa3-7a7b4be75141/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 05:21:27,271 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_69af3446-2b85-43dc-afa3-7a7b4be75141/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2024-11-28 05:21:27,359 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 05:21:27,360 INFO L256 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 14 conjuncts are in the unsatisfiable core [2024-11-28 05:21:27,361 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 05:21:27,442 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-28 05:21:27,442 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-28 05:21:27,504 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 05:21:27,523 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-28 05:21:27,523 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1996674294] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-28 05:21:27,523 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-28 05:21:27,523 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 7 [2024-11-28 05:21:27,523 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [264871730] [2024-11-28 05:21:27,523 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-28 05:21:27,523 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-11-28 05:21:27,524 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 05:21:27,524 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-11-28 05:21:27,524 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2024-11-28 05:21:27,703 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 18 out of 58 [2024-11-28 05:21:27,703 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 46 places, 46 transitions, 104 flow. Second operand has 9 states, 9 states have (on average 19.444444444444443) internal successors, (175), 9 states have internal predecessors, (175), 0 states have call successors, (0), 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 05:21:27,703 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-28 05:21:27,703 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 18 of 58 [2024-11-28 05:21:27,703 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-28 05:21:28,233 INFO L124 PetriNetUnfolderBase]: 1680/2514 cut-off events. [2024-11-28 05:21:28,234 INFO L125 PetriNetUnfolderBase]: For 21/21 co-relation queries the response was YES. [2024-11-28 05:21:28,238 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4853 conditions, 2514 events. 1680/2514 cut-off events. For 21/21 co-relation queries the response was YES. Maximal size of possible extension queue 136. Compared 12269 event pairs, 483 based on Foata normal form. 0/2337 useless extension candidates. Maximal degree in co-relation 4842. Up to 1041 conditions per place. [2024-11-28 05:21:28,249 INFO L140 encePairwiseOnDemand]: 49/58 looper letters, 65 selfloop transitions, 9 changer transitions 0/82 dead transitions. [2024-11-28 05:21:28,249 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 51 places, 82 transitions, 328 flow [2024-11-28 05:21:28,249 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-11-28 05:21:28,249 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-11-28 05:21:28,250 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 200 transitions. [2024-11-28 05:21:28,251 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.49261083743842365 [2024-11-28 05:21:28,251 INFO L175 Difference]: Start difference. First operand has 46 places, 46 transitions, 104 flow. Second operand 7 states and 200 transitions. [2024-11-28 05:21:28,251 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 51 places, 82 transitions, 328 flow [2024-11-28 05:21:28,251 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 49 places, 82 transitions, 324 flow, removed 0 selfloop flow, removed 2 redundant places. [2024-11-28 05:21:28,253 INFO L231 Difference]: Finished difference. Result has 51 places, 48 transitions, 138 flow [2024-11-28 05:21:28,253 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=58, PETRI_DIFFERENCE_MINUEND_FLOW=98, PETRI_DIFFERENCE_MINUEND_PLACES=43, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=45, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=37, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=138, PETRI_PLACES=51, PETRI_TRANSITIONS=48} [2024-11-28 05:21:28,253 INFO L279 CegarLoopForPetriNet]: 58 programPoint places, -7 predicate places. [2024-11-28 05:21:28,253 INFO L471 AbstractCegarLoop]: Abstraction has has 51 places, 48 transitions, 138 flow [2024-11-28 05:21:28,254 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 19.444444444444443) internal successors, (175), 9 states have internal predecessors, (175), 0 states have call successors, (0), 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 05:21:28,254 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-28 05:21:28,254 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 05:21:28,263 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_69af3446-2b85-43dc-afa3-7a7b4be75141/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2024-11-28 05:21:28,454 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_69af3446-2b85-43dc-afa3-7a7b4be75141/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 05:21:28,455 INFO L396 AbstractCegarLoop]: === Iteration 7 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 32 more)] === [2024-11-28 05:21:28,455 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 05:21:28,455 INFO L85 PathProgramCache]: Analyzing trace with hash -1758737713, now seen corresponding path program 1 times [2024-11-28 05:21:28,455 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 05:21:28,456 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [752516297] [2024-11-28 05:21:28,456 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-28 05:21:28,456 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 05:21:28,472 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 05:21:28,636 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-28 05:21:28,636 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 05:21:28,636 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [752516297] [2024-11-28 05:21:28,636 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [752516297] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-28 05:21:28,636 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1495392095] [2024-11-28 05:21:28,636 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-28 05:21:28,636 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 05:21:28,636 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_69af3446-2b85-43dc-afa3-7a7b4be75141/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 05:21:28,645 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_69af3446-2b85-43dc-afa3-7a7b4be75141/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 05:21:28,651 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_69af3446-2b85-43dc-afa3-7a7b4be75141/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2024-11-28 05:21:28,746 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 05:21:28,749 INFO L256 TraceCheckSpWp]: Trace formula consists of 115 conjuncts, 8 conjuncts are in the unsatisfiable core [2024-11-28 05:21:28,751 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 05:21:28,831 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-28 05:21:28,831 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-28 05:21:28,911 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-28 05:21:28,911 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1495392095] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-28 05:21:28,911 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-28 05:21:28,911 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 12 [2024-11-28 05:21:28,911 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1757145810] [2024-11-28 05:21:28,911 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-28 05:21:28,912 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2024-11-28 05:21:28,912 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 05:21:28,912 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2024-11-28 05:21:28,912 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=115, Unknown=0, NotChecked=0, Total=156 [2024-11-28 05:21:29,003 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 19 out of 58 [2024-11-28 05:21:29,004 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 51 places, 48 transitions, 138 flow. Second operand has 13 states, 13 states have (on average 20.846153846153847) internal successors, (271), 13 states have internal predecessors, (271), 0 states have call successors, (0), 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 05:21:29,004 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-28 05:21:29,004 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 19 of 58 [2024-11-28 05:21:29,004 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-28 05:21:29,739 INFO L124 PetriNetUnfolderBase]: 2559/3798 cut-off events. [2024-11-28 05:21:29,739 INFO L125 PetriNetUnfolderBase]: For 1567/1622 co-relation queries the response was YES. [2024-11-28 05:21:29,745 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8689 conditions, 3798 events. 2559/3798 cut-off events. For 1567/1622 co-relation queries the response was YES. Maximal size of possible extension queue 178. Compared 18673 event pairs, 1504 based on Foata normal form. 0/3519 useless extension candidates. Maximal degree in co-relation 5922. Up to 2430 conditions per place. [2024-11-28 05:21:29,762 INFO L140 encePairwiseOnDemand]: 51/58 looper letters, 76 selfloop transitions, 8 changer transitions 0/92 dead transitions. [2024-11-28 05:21:29,762 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 57 places, 92 transitions, 446 flow [2024-11-28 05:21:29,762 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-11-28 05:21:29,762 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-11-28 05:21:29,763 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 209 transitions. [2024-11-28 05:21:29,764 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.5147783251231527 [2024-11-28 05:21:29,764 INFO L175 Difference]: Start difference. First operand has 51 places, 48 transitions, 138 flow. Second operand 7 states and 209 transitions. [2024-11-28 05:21:29,764 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 57 places, 92 transitions, 446 flow [2024-11-28 05:21:29,766 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 54 places, 92 transitions, 440 flow, removed 0 selfloop flow, removed 3 redundant places. [2024-11-28 05:21:29,767 INFO L231 Difference]: Finished difference. Result has 56 places, 50 transitions, 163 flow [2024-11-28 05:21:29,767 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=58, PETRI_DIFFERENCE_MINUEND_FLOW=132, PETRI_DIFFERENCE_MINUEND_PLACES=48, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=48, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=40, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=163, PETRI_PLACES=56, PETRI_TRANSITIONS=50} [2024-11-28 05:21:29,768 INFO L279 CegarLoopForPetriNet]: 58 programPoint places, -2 predicate places. [2024-11-28 05:21:29,768 INFO L471 AbstractCegarLoop]: Abstraction has has 56 places, 50 transitions, 163 flow [2024-11-28 05:21:29,769 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 20.846153846153847) internal successors, (271), 13 states have internal predecessors, (271), 0 states have call successors, (0), 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 05:21:29,769 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-28 05:21:29,769 INFO L206 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 05:21:29,778 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_69af3446-2b85-43dc-afa3-7a7b4be75141/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2024-11-28 05:21:29,973 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_69af3446-2b85-43dc-afa3-7a7b4be75141/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 05:21:29,973 INFO L396 AbstractCegarLoop]: === Iteration 8 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 32 more)] === [2024-11-28 05:21:29,973 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 05:21:29,974 INFO L85 PathProgramCache]: Analyzing trace with hash 405821944, now seen corresponding path program 2 times [2024-11-28 05:21:29,974 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 05:21:29,974 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [794553935] [2024-11-28 05:21:29,974 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-28 05:21:29,974 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 05:21:29,991 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2024-11-28 05:21:29,991 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 05:21:30,219 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2024-11-28 05:21:30,219 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 05:21:30,219 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [794553935] [2024-11-28 05:21:30,219 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [794553935] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-28 05:21:30,219 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-28 05:21:30,220 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-11-28 05:21:30,220 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [581543993] [2024-11-28 05:21:30,220 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-28 05:21:30,220 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-11-28 05:21:30,220 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 05:21:30,220 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-11-28 05:21:30,220 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2024-11-28 05:21:30,331 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 58 [2024-11-28 05:21:30,331 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 56 places, 50 transitions, 163 flow. Second operand has 6 states, 6 states have (on average 18.666666666666668) internal successors, (112), 6 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 05:21:30,331 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-28 05:21:30,331 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 58 [2024-11-28 05:21:30,331 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-28 05:21:31,179 INFO L124 PetriNetUnfolderBase]: 4429/6342 cut-off events. [2024-11-28 05:21:31,179 INFO L125 PetriNetUnfolderBase]: For 3105/3229 co-relation queries the response was YES. [2024-11-28 05:21:31,194 INFO L83 FinitePrefix]: Finished finitePrefix Result has 15462 conditions, 6342 events. 4429/6342 cut-off events. For 3105/3229 co-relation queries the response was YES. Maximal size of possible extension queue 219. Compared 31642 event pairs, 1966 based on Foata normal form. 0/5671 useless extension candidates. Maximal degree in co-relation 12289. Up to 3995 conditions per place. [2024-11-28 05:21:31,231 INFO L140 encePairwiseOnDemand]: 50/58 looper letters, 77 selfloop transitions, 9 changer transitions 0/92 dead transitions. [2024-11-28 05:21:31,232 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 61 places, 92 transitions, 471 flow [2024-11-28 05:21:31,235 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-11-28 05:21:31,235 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-11-28 05:21:31,236 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 174 transitions. [2024-11-28 05:21:31,236 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.5 [2024-11-28 05:21:31,236 INFO L175 Difference]: Start difference. First operand has 56 places, 50 transitions, 163 flow. Second operand 6 states and 174 transitions. [2024-11-28 05:21:31,236 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 61 places, 92 transitions, 471 flow [2024-11-28 05:21:31,241 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 57 places, 92 transitions, 460 flow, removed 0 selfloop flow, removed 4 redundant places. [2024-11-28 05:21:31,242 INFO L231 Difference]: Finished difference. Result has 59 places, 53 transitions, 197 flow [2024-11-28 05:21:31,242 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=58, PETRI_DIFFERENCE_MINUEND_FLOW=152, PETRI_DIFFERENCE_MINUEND_PLACES=52, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=50, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=41, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=197, PETRI_PLACES=59, PETRI_TRANSITIONS=53} [2024-11-28 05:21:31,243 INFO L279 CegarLoopForPetriNet]: 58 programPoint places, 1 predicate places. [2024-11-28 05:21:31,243 INFO L471 AbstractCegarLoop]: Abstraction has has 59 places, 53 transitions, 197 flow [2024-11-28 05:21:31,243 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 18.666666666666668) internal successors, (112), 6 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 05:21:31,243 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-28 05:21:31,243 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 05:21:31,243 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2024-11-28 05:21:31,243 INFO L396 AbstractCegarLoop]: === Iteration 9 === Targeting thread3Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 32 more)] === [2024-11-28 05:21:31,244 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 05:21:31,244 INFO L85 PathProgramCache]: Analyzing trace with hash 2035915033, now seen corresponding path program 1 times [2024-11-28 05:21:31,244 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 05:21:31,244 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1985150422] [2024-11-28 05:21:31,244 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-28 05:21:31,244 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 05:21:31,263 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 05:21:31,525 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-28 05:21:31,525 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 05:21:31,525 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1985150422] [2024-11-28 05:21:31,525 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1985150422] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-28 05:21:31,525 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-28 05:21:31,525 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-11-28 05:21:31,525 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [577421652] [2024-11-28 05:21:31,525 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-28 05:21:31,525 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-11-28 05:21:31,526 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 05:21:31,526 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-11-28 05:21:31,526 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2024-11-28 05:21:31,651 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 20 out of 58 [2024-11-28 05:21:31,652 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 59 places, 53 transitions, 197 flow. Second operand has 6 states, 6 states have (on average 21.833333333333332) internal successors, (131), 6 states have internal predecessors, (131), 0 states have call successors, (0), 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 05:21:31,652 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-28 05:21:31,652 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 20 of 58 [2024-11-28 05:21:31,652 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-28 05:21:32,510 INFO L124 PetriNetUnfolderBase]: 4070/6291 cut-off events. [2024-11-28 05:21:32,510 INFO L125 PetriNetUnfolderBase]: For 5382/5595 co-relation queries the response was YES. [2024-11-28 05:21:32,529 INFO L83 FinitePrefix]: Finished finitePrefix Result has 16202 conditions, 6291 events. 4070/6291 cut-off events. For 5382/5595 co-relation queries the response was YES. Maximal size of possible extension queue 214. Compared 34719 event pairs, 1771 based on Foata normal form. 22/6098 useless extension candidates. Maximal degree in co-relation 11971. Up to 3722 conditions per place. [2024-11-28 05:21:32,555 INFO L140 encePairwiseOnDemand]: 51/58 looper letters, 60 selfloop transitions, 7 changer transitions 0/77 dead transitions. [2024-11-28 05:21:32,555 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 63 places, 77 transitions, 436 flow [2024-11-28 05:21:32,556 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-11-28 05:21:32,556 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-11-28 05:21:32,556 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 149 transitions. [2024-11-28 05:21:32,556 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.5137931034482759 [2024-11-28 05:21:32,557 INFO L175 Difference]: Start difference. First operand has 59 places, 53 transitions, 197 flow. Second operand 5 states and 149 transitions. [2024-11-28 05:21:32,557 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 63 places, 77 transitions, 436 flow [2024-11-28 05:21:32,566 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 60 places, 77 transitions, 414 flow, removed 3 selfloop flow, removed 3 redundant places. [2024-11-28 05:21:32,567 INFO L231 Difference]: Finished difference. Result has 62 places, 55 transitions, 216 flow [2024-11-28 05:21:32,567 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=58, PETRI_DIFFERENCE_MINUEND_FLOW=182, PETRI_DIFFERENCE_MINUEND_PLACES=56, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=53, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=46, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=216, PETRI_PLACES=62, PETRI_TRANSITIONS=55} [2024-11-28 05:21:32,568 INFO L279 CegarLoopForPetriNet]: 58 programPoint places, 4 predicate places. [2024-11-28 05:21:32,568 INFO L471 AbstractCegarLoop]: Abstraction has has 62 places, 55 transitions, 216 flow [2024-11-28 05:21:32,568 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 21.833333333333332) internal successors, (131), 6 states have internal predecessors, (131), 0 states have call successors, (0), 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 05:21:32,568 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-28 05:21:32,568 INFO L206 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 05:21:32,568 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2024-11-28 05:21:32,568 INFO L396 AbstractCegarLoop]: === Iteration 10 === Targeting thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 32 more)] === [2024-11-28 05:21:32,569 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 05:21:32,569 INFO L85 PathProgramCache]: Analyzing trace with hash -1088037374, now seen corresponding path program 1 times [2024-11-28 05:21:32,569 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 05:21:32,569 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [711606524] [2024-11-28 05:21:32,569 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-28 05:21:32,569 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 05:21:32,582 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 05:21:32,684 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-28 05:21:32,685 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 05:21:32,685 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [711606524] [2024-11-28 05:21:32,685 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [711606524] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-28 05:21:32,685 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1785609003] [2024-11-28 05:21:32,685 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-28 05:21:32,685 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 05:21:32,685 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_69af3446-2b85-43dc-afa3-7a7b4be75141/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 05:21:32,687 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_69af3446-2b85-43dc-afa3-7a7b4be75141/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 05:21:32,692 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_69af3446-2b85-43dc-afa3-7a7b4be75141/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2024-11-28 05:21:32,764 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 05:21:32,765 INFO L256 TraceCheckSpWp]: Trace formula consists of 121 conjuncts, 8 conjuncts are in the unsatisfiable core [2024-11-28 05:21:32,766 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 05:21:32,853 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-28 05:21:32,853 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-28 05:21:32,950 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-28 05:21:32,952 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1785609003] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-28 05:21:32,952 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-28 05:21:32,952 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 13 [2024-11-28 05:21:32,953 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2081738268] [2024-11-28 05:21:32,953 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-28 05:21:32,953 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2024-11-28 05:21:32,953 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 05:21:32,953 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2024-11-28 05:21:32,953 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=127, Unknown=0, NotChecked=0, Total=182 [2024-11-28 05:21:33,037 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 19 out of 58 [2024-11-28 05:21:33,037 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 62 places, 55 transitions, 216 flow. Second operand has 14 states, 14 states have (on average 21.142857142857142) internal successors, (296), 14 states have internal predecessors, (296), 0 states have call successors, (0), 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 05:21:33,037 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-28 05:21:33,037 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 19 of 58 [2024-11-28 05:21:33,037 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-28 05:21:34,064 INFO L124 PetriNetUnfolderBase]: 4550/6829 cut-off events. [2024-11-28 05:21:34,064 INFO L125 PetriNetUnfolderBase]: For 6623/6949 co-relation queries the response was YES. [2024-11-28 05:21:34,082 INFO L83 FinitePrefix]: Finished finitePrefix Result has 18959 conditions, 6829 events. 4550/6829 cut-off events. For 6623/6949 co-relation queries the response was YES. Maximal size of possible extension queue 223. Compared 36004 event pairs, 2571 based on Foata normal form. 181/6986 useless extension candidates. Maximal degree in co-relation 15157. Up to 4992 conditions per place. [2024-11-28 05:21:34,107 INFO L140 encePairwiseOnDemand]: 50/58 looper letters, 89 selfloop transitions, 10 changer transitions 0/108 dead transitions. [2024-11-28 05:21:34,108 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 69 places, 108 transitions, 636 flow [2024-11-28 05:21:34,108 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-11-28 05:21:34,108 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-11-28 05:21:34,109 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 239 transitions. [2024-11-28 05:21:34,109 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.5150862068965517 [2024-11-28 05:21:34,110 INFO L175 Difference]: Start difference. First operand has 62 places, 55 transitions, 216 flow. Second operand 8 states and 239 transitions. [2024-11-28 05:21:34,110 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 69 places, 108 transitions, 636 flow [2024-11-28 05:21:34,117 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 67 places, 108 transitions, 632 flow, removed 0 selfloop flow, removed 2 redundant places. [2024-11-28 05:21:34,118 INFO L231 Difference]: Finished difference. Result has 70 places, 59 transitions, 273 flow [2024-11-28 05:21:34,119 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=58, PETRI_DIFFERENCE_MINUEND_FLOW=212, PETRI_DIFFERENCE_MINUEND_PLACES=60, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=55, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=45, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=273, PETRI_PLACES=70, PETRI_TRANSITIONS=59} [2024-11-28 05:21:34,119 INFO L279 CegarLoopForPetriNet]: 58 programPoint places, 12 predicate places. [2024-11-28 05:21:34,119 INFO L471 AbstractCegarLoop]: Abstraction has has 70 places, 59 transitions, 273 flow [2024-11-28 05:21:34,120 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 21.142857142857142) internal successors, (296), 14 states have internal predecessors, (296), 0 states have call successors, (0), 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 05:21:34,120 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-28 05:21:34,120 INFO L206 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 05:21:34,130 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_69af3446-2b85-43dc-afa3-7a7b4be75141/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2024-11-28 05:21:34,324 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_69af3446-2b85-43dc-afa3-7a7b4be75141/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 05:21:34,324 INFO L396 AbstractCegarLoop]: === Iteration 11 === Targeting thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 32 more)] === [2024-11-28 05:21:34,325 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 05:21:34,325 INFO L85 PathProgramCache]: Analyzing trace with hash 289621739, now seen corresponding path program 2 times [2024-11-28 05:21:34,325 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 05:21:34,325 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [608425898] [2024-11-28 05:21:34,325 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-28 05:21:34,325 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 05:21:34,347 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-28 05:21:34,347 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 05:21:34,652 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2024-11-28 05:21:34,652 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 05:21:34,652 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [608425898] [2024-11-28 05:21:34,652 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [608425898] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-28 05:21:34,652 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [604800749] [2024-11-28 05:21:34,652 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-28 05:21:34,652 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 05:21:34,652 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_69af3446-2b85-43dc-afa3-7a7b4be75141/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 05:21:34,654 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_69af3446-2b85-43dc-afa3-7a7b4be75141/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 05:21:34,663 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_69af3446-2b85-43dc-afa3-7a7b4be75141/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2024-11-28 05:21:34,738 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-28 05:21:34,738 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 05:21:34,739 INFO L256 TraceCheckSpWp]: Trace formula consists of 134 conjuncts, 17 conjuncts are in the unsatisfiable core [2024-11-28 05:21:34,741 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 05:21:34,911 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 4 proven. 6 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-28 05:21:34,911 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-28 05:21:35,053 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 05:21:35,118 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 4 proven. 6 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-28 05:21:35,118 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [604800749] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-28 05:21:35,118 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-28 05:21:35,119 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 6, 6] total 17 [2024-11-28 05:21:35,119 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [829616051] [2024-11-28 05:21:35,119 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-28 05:21:35,119 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2024-11-28 05:21:35,119 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 05:21:35,120 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2024-11-28 05:21:35,120 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=290, Unknown=0, NotChecked=0, Total=342 [2024-11-28 05:21:35,888 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 58 [2024-11-28 05:21:35,889 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 70 places, 59 transitions, 273 flow. Second operand has 19 states, 19 states have (on average 19.105263157894736) internal successors, (363), 19 states have internal predecessors, (363), 0 states have call successors, (0), 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 05:21:35,889 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-28 05:21:35,889 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 58 [2024-11-28 05:21:35,889 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-28 05:21:38,232 INFO L124 PetriNetUnfolderBase]: 6106/8661 cut-off events. [2024-11-28 05:21:38,232 INFO L125 PetriNetUnfolderBase]: For 9242/9804 co-relation queries the response was YES. [2024-11-28 05:21:38,269 INFO L83 FinitePrefix]: Finished finitePrefix Result has 25487 conditions, 8661 events. 6106/8661 cut-off events. For 9242/9804 co-relation queries the response was YES. Maximal size of possible extension queue 223. Compared 43130 event pairs, 597 based on Foata normal form. 425/9078 useless extension candidates. Maximal degree in co-relation 21280. Up to 1898 conditions per place. [2024-11-28 05:21:38,310 INFO L140 encePairwiseOnDemand]: 49/58 looper letters, 184 selfloop transitions, 18 changer transitions 0/210 dead transitions. [2024-11-28 05:21:38,310 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 82 places, 210 transitions, 1283 flow [2024-11-28 05:21:38,311 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2024-11-28 05:21:38,311 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2024-11-28 05:21:38,312 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 413 transitions. [2024-11-28 05:21:38,313 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.5086206896551724 [2024-11-28 05:21:38,313 INFO L175 Difference]: Start difference. First operand has 70 places, 59 transitions, 273 flow. Second operand 14 states and 413 transitions. [2024-11-28 05:21:38,313 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 82 places, 210 transitions, 1283 flow [2024-11-28 05:21:38,329 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 78 places, 210 transitions, 1270 flow, removed 1 selfloop flow, removed 4 redundant places. [2024-11-28 05:21:38,331 INFO L231 Difference]: Finished difference. Result has 80 places, 62 transitions, 322 flow [2024-11-28 05:21:38,331 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=58, PETRI_DIFFERENCE_MINUEND_FLOW=256, PETRI_DIFFERENCE_MINUEND_PLACES=65, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=58, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=14, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=43, PETRI_DIFFERENCE_SUBTRAHEND_STATES=14, PETRI_FLOW=322, PETRI_PLACES=80, PETRI_TRANSITIONS=62} [2024-11-28 05:21:38,332 INFO L279 CegarLoopForPetriNet]: 58 programPoint places, 22 predicate places. [2024-11-28 05:21:38,332 INFO L471 AbstractCegarLoop]: Abstraction has has 80 places, 62 transitions, 322 flow [2024-11-28 05:21:38,333 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 19.105263157894736) internal successors, (363), 19 states have internal predecessors, (363), 0 states have call successors, (0), 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 05:21:38,333 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-28 05:21:38,333 INFO L206 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 05:21:38,344 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_69af3446-2b85-43dc-afa3-7a7b4be75141/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2024-11-28 05:21:38,537 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_69af3446-2b85-43dc-afa3-7a7b4be75141/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2024-11-28 05:21:38,537 INFO L396 AbstractCegarLoop]: === Iteration 12 === Targeting thread3Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 32 more)] === [2024-11-28 05:21:38,537 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 05:21:38,538 INFO L85 PathProgramCache]: Analyzing trace with hash -1582492729, now seen corresponding path program 1 times [2024-11-28 05:21:38,538 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 05:21:38,538 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [99987618] [2024-11-28 05:21:38,538 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-28 05:21:38,538 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 05:21:38,558 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 05:21:38,768 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-28 05:21:38,769 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 05:21:38,769 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [99987618] [2024-11-28 05:21:38,769 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [99987618] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-28 05:21:38,769 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [330231474] [2024-11-28 05:21:38,769 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-28 05:21:38,769 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 05:21:38,770 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_69af3446-2b85-43dc-afa3-7a7b4be75141/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 05:21:38,772 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_69af3446-2b85-43dc-afa3-7a7b4be75141/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 05:21:38,776 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_69af3446-2b85-43dc-afa3-7a7b4be75141/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2024-11-28 05:21:38,870 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 05:21:38,872 INFO L256 TraceCheckSpWp]: Trace formula consists of 153 conjuncts, 9 conjuncts are in the unsatisfiable core [2024-11-28 05:21:38,873 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 05:21:39,024 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-28 05:21:39,024 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-28 05:21:39,118 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-28 05:21:39,119 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [330231474] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-28 05:21:39,119 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-28 05:21:39,119 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 13 [2024-11-28 05:21:39,119 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1533222691] [2024-11-28 05:21:39,119 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-28 05:21:39,120 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2024-11-28 05:21:39,120 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 05:21:39,120 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2024-11-28 05:21:39,121 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=133, Unknown=0, NotChecked=0, Total=182 [2024-11-28 05:21:39,214 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 19 out of 58 [2024-11-28 05:21:39,215 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 80 places, 62 transitions, 322 flow. Second operand has 14 states, 14 states have (on average 21.357142857142858) internal successors, (299), 14 states have internal predecessors, (299), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 05:21:39,216 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-28 05:21:39,216 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 19 of 58 [2024-11-28 05:21:39,216 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-28 05:21:40,349 INFO L124 PetriNetUnfolderBase]: 6186/8814 cut-off events. [2024-11-28 05:21:40,350 INFO L125 PetriNetUnfolderBase]: For 15006/15628 co-relation queries the response was YES. [2024-11-28 05:21:40,369 INFO L83 FinitePrefix]: Finished finitePrefix Result has 27169 conditions, 8814 events. 6186/8814 cut-off events. For 15006/15628 co-relation queries the response was YES. Maximal size of possible extension queue 232. Compared 42985 event pairs, 3675 based on Foata normal form. 238/9004 useless extension candidates. Maximal degree in co-relation 23524. Up to 7248 conditions per place. [2024-11-28 05:21:40,417 INFO L140 encePairwiseOnDemand]: 50/58 looper letters, 85 selfloop transitions, 10 changer transitions 0/105 dead transitions. [2024-11-28 05:21:40,417 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 87 places, 105 transitions, 730 flow [2024-11-28 05:21:40,418 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-11-28 05:21:40,418 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-11-28 05:21:40,419 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 236 transitions. [2024-11-28 05:21:40,420 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.5086206896551724 [2024-11-28 05:21:40,420 INFO L175 Difference]: Start difference. First operand has 80 places, 62 transitions, 322 flow. Second operand 8 states and 236 transitions. [2024-11-28 05:21:40,420 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 87 places, 105 transitions, 730 flow [2024-11-28 05:21:40,445 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 76 places, 105 transitions, 638 flow, removed 8 selfloop flow, removed 11 redundant places. [2024-11-28 05:21:40,447 INFO L231 Difference]: Finished difference. Result has 79 places, 66 transitions, 331 flow [2024-11-28 05:21:40,447 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=58, PETRI_DIFFERENCE_MINUEND_FLOW=270, PETRI_DIFFERENCE_MINUEND_PLACES=69, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=62, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=52, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=331, PETRI_PLACES=79, PETRI_TRANSITIONS=66} [2024-11-28 05:21:40,448 INFO L279 CegarLoopForPetriNet]: 58 programPoint places, 21 predicate places. [2024-11-28 05:21:40,448 INFO L471 AbstractCegarLoop]: Abstraction has has 79 places, 66 transitions, 331 flow [2024-11-28 05:21:40,449 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 21.357142857142858) internal successors, (299), 14 states have internal predecessors, (299), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 05:21:40,449 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-28 05:21:40,449 INFO L206 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 05:21:40,460 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_69af3446-2b85-43dc-afa3-7a7b4be75141/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2024-11-28 05:21:40,653 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_69af3446-2b85-43dc-afa3-7a7b4be75141/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 05:21:40,653 INFO L396 AbstractCegarLoop]: === Iteration 13 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 32 more)] === [2024-11-28 05:21:40,654 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 05:21:40,654 INFO L85 PathProgramCache]: Analyzing trace with hash 1970497664, now seen corresponding path program 1 times [2024-11-28 05:21:40,654 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 05:21:40,654 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1131368496] [2024-11-28 05:21:40,654 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-28 05:21:40,655 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 05:21:40,674 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 05:21:40,854 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 1 proven. 9 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-28 05:21:40,854 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 05:21:40,854 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1131368496] [2024-11-28 05:21:40,854 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1131368496] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-28 05:21:40,854 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1010821327] [2024-11-28 05:21:40,854 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-28 05:21:40,854 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 05:21:40,855 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_69af3446-2b85-43dc-afa3-7a7b4be75141/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 05:21:40,857 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_69af3446-2b85-43dc-afa3-7a7b4be75141/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 05:21:40,861 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_69af3446-2b85-43dc-afa3-7a7b4be75141/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2024-11-28 05:21:40,947 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 05:21:40,949 INFO L256 TraceCheckSpWp]: Trace formula consists of 150 conjuncts, 10 conjuncts are in the unsatisfiable core [2024-11-28 05:21:40,951 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 05:21:41,106 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 2 proven. 8 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-28 05:21:41,106 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-28 05:21:41,225 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 2 proven. 8 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-28 05:21:41,225 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1010821327] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-28 05:21:41,225 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-28 05:21:41,225 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 17 [2024-11-28 05:21:41,226 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [244866594] [2024-11-28 05:21:41,226 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-28 05:21:41,226 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2024-11-28 05:21:41,226 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 05:21:41,226 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2024-11-28 05:21:41,227 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=234, Unknown=0, NotChecked=0, Total=306 [2024-11-28 05:21:41,345 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 19 out of 58 [2024-11-28 05:21:41,346 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 79 places, 66 transitions, 331 flow. Second operand has 18 states, 18 states have (on average 21.27777777777778) internal successors, (383), 18 states have internal predecessors, (383), 0 states have call successors, (0), 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 05:21:41,346 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-28 05:21:41,346 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 19 of 58 [2024-11-28 05:21:41,346 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-28 05:21:42,839 INFO L124 PetriNetUnfolderBase]: 9395/13676 cut-off events. [2024-11-28 05:21:42,839 INFO L125 PetriNetUnfolderBase]: For 21298/21731 co-relation queries the response was YES. [2024-11-28 05:21:42,865 INFO L83 FinitePrefix]: Finished finitePrefix Result has 42533 conditions, 13676 events. 9395/13676 cut-off events. For 21298/21731 co-relation queries the response was YES. Maximal size of possible extension queue 355. Compared 75512 event pairs, 4176 based on Foata normal form. 0/13513 useless extension candidates. Maximal degree in co-relation 23592. Up to 6944 conditions per place. [2024-11-28 05:21:42,913 INFO L140 encePairwiseOnDemand]: 50/58 looper letters, 134 selfloop transitions, 14 changer transitions 0/157 dead transitions. [2024-11-28 05:21:42,913 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 87 places, 157 transitions, 1093 flow [2024-11-28 05:21:42,914 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-11-28 05:21:42,914 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-11-28 05:21:42,915 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 271 transitions. [2024-11-28 05:21:42,915 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.5191570881226054 [2024-11-28 05:21:42,915 INFO L175 Difference]: Start difference. First operand has 79 places, 66 transitions, 331 flow. Second operand 9 states and 271 transitions. [2024-11-28 05:21:42,915 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 87 places, 157 transitions, 1093 flow [2024-11-28 05:21:42,957 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 83 places, 157 transitions, 1074 flow, removed 2 selfloop flow, removed 4 redundant places. [2024-11-28 05:21:42,959 INFO L231 Difference]: Finished difference. Result has 88 places, 73 transitions, 413 flow [2024-11-28 05:21:42,960 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=58, PETRI_DIFFERENCE_MINUEND_FLOW=318, PETRI_DIFFERENCE_MINUEND_PLACES=75, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=66, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=53, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=413, PETRI_PLACES=88, PETRI_TRANSITIONS=73} [2024-11-28 05:21:42,960 INFO L279 CegarLoopForPetriNet]: 58 programPoint places, 30 predicate places. [2024-11-28 05:21:42,961 INFO L471 AbstractCegarLoop]: Abstraction has has 88 places, 73 transitions, 413 flow [2024-11-28 05:21:42,961 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 21.27777777777778) internal successors, (383), 18 states have internal predecessors, (383), 0 states have call successors, (0), 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 05:21:42,961 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-28 05:21:42,961 INFO L206 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 05:21:42,971 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_69af3446-2b85-43dc-afa3-7a7b4be75141/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2024-11-28 05:21:43,165 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12,8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_69af3446-2b85-43dc-afa3-7a7b4be75141/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 05:21:43,165 INFO L396 AbstractCegarLoop]: === Iteration 14 === Targeting thread3Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 32 more)] === [2024-11-28 05:21:43,165 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 05:21:43,165 INFO L85 PathProgramCache]: Analyzing trace with hash 1847629374, now seen corresponding path program 2 times [2024-11-28 05:21:43,166 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 05:21:43,166 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2063586356] [2024-11-28 05:21:43,166 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-28 05:21:43,166 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 05:21:43,202 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-28 05:21:43,202 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 05:21:43,563 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2024-11-28 05:21:43,563 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 05:21:43,564 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2063586356] [2024-11-28 05:21:43,564 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2063586356] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-28 05:21:43,564 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1947406303] [2024-11-28 05:21:43,564 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-28 05:21:43,564 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 05:21:43,564 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_69af3446-2b85-43dc-afa3-7a7b4be75141/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 05:21:43,566 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_69af3446-2b85-43dc-afa3-7a7b4be75141/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 05:21:43,569 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_69af3446-2b85-43dc-afa3-7a7b4be75141/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2024-11-28 05:21:43,706 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-28 05:21:43,706 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 05:21:43,710 INFO L256 TraceCheckSpWp]: Trace formula consists of 166 conjuncts, 24 conjuncts are in the unsatisfiable core [2024-11-28 05:21:43,712 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 05:21:43,728 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 05:21:44,092 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2024-11-28 05:21:44,092 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-28 05:21:44,592 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2024-11-28 05:21:44,593 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1947406303] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-28 05:21:44,593 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-28 05:21:44,593 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 5, 5] total 14 [2024-11-28 05:21:44,594 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1642839418] [2024-11-28 05:21:44,594 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-28 05:21:44,594 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2024-11-28 05:21:44,597 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 05:21:44,598 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2024-11-28 05:21:44,598 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=191, Unknown=0, NotChecked=0, Total=240 [2024-11-28 05:21:45,132 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 19 out of 58 [2024-11-28 05:21:45,134 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 88 places, 73 transitions, 413 flow. Second operand has 16 states, 16 states have (on average 21.8125) internal successors, (349), 16 states have internal predecessors, (349), 0 states have call successors, (0), 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 05:21:45,134 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-28 05:21:45,134 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 19 of 58 [2024-11-28 05:21:45,134 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-28 05:21:47,160 INFO L124 PetriNetUnfolderBase]: 9748/13566 cut-off events. [2024-11-28 05:21:47,160 INFO L125 PetriNetUnfolderBase]: For 25815/27168 co-relation queries the response was YES. [2024-11-28 05:21:47,190 INFO L83 FinitePrefix]: Finished finitePrefix Result has 44492 conditions, 13566 events. 9748/13566 cut-off events. For 25815/27168 co-relation queries the response was YES. Maximal size of possible extension queue 336. Compared 69439 event pairs, 1895 based on Foata normal form. 1060/14606 useless extension candidates. Maximal degree in co-relation 33559. Up to 4458 conditions per place. [2024-11-28 05:21:47,222 INFO L140 encePairwiseOnDemand]: 51/58 looper letters, 140 selfloop transitions, 12 changer transitions 0/162 dead transitions. [2024-11-28 05:21:47,222 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 93 places, 162 transitions, 1227 flow [2024-11-28 05:21:47,222 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-11-28 05:21:47,222 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-11-28 05:21:47,223 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 214 transitions. [2024-11-28 05:21:47,223 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.5270935960591133 [2024-11-28 05:21:47,223 INFO L175 Difference]: Start difference. First operand has 88 places, 73 transitions, 413 flow. Second operand 7 states and 214 transitions. [2024-11-28 05:21:47,223 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 93 places, 162 transitions, 1227 flow [2024-11-28 05:21:47,261 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 90 places, 162 transitions, 1200 flow, removed 8 selfloop flow, removed 3 redundant places. [2024-11-28 05:21:47,263 INFO L231 Difference]: Finished difference. Result has 91 places, 72 transitions, 420 flow [2024-11-28 05:21:47,263 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=58, PETRI_DIFFERENCE_MINUEND_FLOW=377, PETRI_DIFFERENCE_MINUEND_PLACES=84, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=70, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=59, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=420, PETRI_PLACES=91, PETRI_TRANSITIONS=72} [2024-11-28 05:21:47,264 INFO L279 CegarLoopForPetriNet]: 58 programPoint places, 33 predicate places. [2024-11-28 05:21:47,264 INFO L471 AbstractCegarLoop]: Abstraction has has 91 places, 72 transitions, 420 flow [2024-11-28 05:21:47,264 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 21.8125) internal successors, (349), 16 states have internal predecessors, (349), 0 states have call successors, (0), 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 05:21:47,264 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-28 05:21:47,264 INFO L206 CegarLoopForPetriNet]: trace histogram [3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 05:21:47,274 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_69af3446-2b85-43dc-afa3-7a7b4be75141/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Ended with exit code 0 [2024-11-28 05:21:47,468 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_69af3446-2b85-43dc-afa3-7a7b4be75141/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2024-11-28 05:21:47,469 INFO L396 AbstractCegarLoop]: === Iteration 15 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 32 more)] === [2024-11-28 05:21:47,469 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 05:21:47,469 INFO L85 PathProgramCache]: Analyzing trace with hash 930100457, now seen corresponding path program 2 times [2024-11-28 05:21:47,469 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 05:21:47,469 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [233454447] [2024-11-28 05:21:47,469 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-28 05:21:47,469 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 05:21:47,499 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-28 05:21:47,499 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 05:21:47,805 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2024-11-28 05:21:47,805 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 05:21:47,805 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [233454447] [2024-11-28 05:21:47,805 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [233454447] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-28 05:21:47,805 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [44763168] [2024-11-28 05:21:47,805 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-28 05:21:47,806 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 05:21:47,806 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_69af3446-2b85-43dc-afa3-7a7b4be75141/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 05:21:47,808 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_69af3446-2b85-43dc-afa3-7a7b4be75141/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 05:21:47,812 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_69af3446-2b85-43dc-afa3-7a7b4be75141/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2024-11-28 05:21:47,921 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-28 05:21:47,922 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 05:21:47,923 INFO L256 TraceCheckSpWp]: Trace formula consists of 163 conjuncts, 23 conjuncts are in the unsatisfiable core [2024-11-28 05:21:47,925 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 05:21:47,948 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 05:21:48,272 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2024-11-28 05:21:48,272 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-28 05:21:48,614 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2024-11-28 05:21:48,614 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [44763168] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-28 05:21:48,614 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-28 05:21:48,614 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 15 [2024-11-28 05:21:48,615 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1371820957] [2024-11-28 05:21:48,615 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-28 05:21:48,615 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2024-11-28 05:21:48,615 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 05:21:48,616 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2024-11-28 05:21:48,616 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=212, Unknown=0, NotChecked=0, Total=272 [2024-11-28 05:21:49,032 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 58 [2024-11-28 05:21:49,032 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 91 places, 72 transitions, 420 flow. Second operand has 17 states, 17 states have (on average 19.470588235294116) internal successors, (331), 17 states have internal predecessors, (331), 0 states have call successors, (0), 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 05:21:49,032 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-28 05:21:49,032 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 58 [2024-11-28 05:21:49,032 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-28 05:21:50,590 INFO L124 PetriNetUnfolderBase]: 9578/13600 cut-off events. [2024-11-28 05:21:50,590 INFO L125 PetriNetUnfolderBase]: For 31103/31637 co-relation queries the response was YES. [2024-11-28 05:21:50,642 INFO L83 FinitePrefix]: Finished finitePrefix Result has 46504 conditions, 13600 events. 9578/13600 cut-off events. For 31103/31637 co-relation queries the response was YES. Maximal size of possible extension queue 362. Compared 73265 event pairs, 1384 based on Foata normal form. 320/13594 useless extension candidates. Maximal degree in co-relation 32982. Up to 5508 conditions per place. [2024-11-28 05:21:50,690 INFO L140 encePairwiseOnDemand]: 50/58 looper letters, 140 selfloop transitions, 18 changer transitions 0/166 dead transitions. [2024-11-28 05:21:50,690 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 96 places, 166 transitions, 1264 flow [2024-11-28 05:21:50,690 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-11-28 05:21:50,690 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-11-28 05:21:50,691 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 233 transitions. [2024-11-28 05:21:50,692 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.5021551724137931 [2024-11-28 05:21:50,692 INFO L175 Difference]: Start difference. First operand has 91 places, 72 transitions, 420 flow. Second operand 8 states and 233 transitions. [2024-11-28 05:21:50,692 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 96 places, 166 transitions, 1264 flow [2024-11-28 05:21:50,777 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 93 places, 166 transitions, 1220 flow, removed 11 selfloop flow, removed 3 redundant places. [2024-11-28 05:21:50,779 INFO L231 Difference]: Finished difference. Result has 93 places, 72 transitions, 442 flow [2024-11-28 05:21:50,779 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=58, PETRI_DIFFERENCE_MINUEND_FLOW=394, PETRI_DIFFERENCE_MINUEND_PLACES=86, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=70, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=16, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=54, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=442, PETRI_PLACES=93, PETRI_TRANSITIONS=72} [2024-11-28 05:21:50,780 INFO L279 CegarLoopForPetriNet]: 58 programPoint places, 35 predicate places. [2024-11-28 05:21:50,780 INFO L471 AbstractCegarLoop]: Abstraction has has 93 places, 72 transitions, 442 flow [2024-11-28 05:21:50,780 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 19.470588235294116) internal successors, (331), 17 states have internal predecessors, (331), 0 states have call successors, (0), 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 05:21:50,780 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-28 05:21:50,781 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 05:21:50,790 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_69af3446-2b85-43dc-afa3-7a7b4be75141/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Ended with exit code 0 [2024-11-28 05:21:50,981 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_69af3446-2b85-43dc-afa3-7a7b4be75141/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2024-11-28 05:21:50,981 INFO L396 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 32 more)] === [2024-11-28 05:21:50,982 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 05:21:50,982 INFO L85 PathProgramCache]: Analyzing trace with hash -1382055103, now seen corresponding path program 1 times [2024-11-28 05:21:50,982 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 05:21:50,982 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [200584077] [2024-11-28 05:21:50,982 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-28 05:21:50,982 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 05:21:50,999 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 05:21:51,127 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 05:21:51,127 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 05:21:51,127 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [200584077] [2024-11-28 05:21:51,127 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [200584077] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-28 05:21:51,127 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1708175784] [2024-11-28 05:21:51,127 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-28 05:21:51,128 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 05:21:51,128 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_69af3446-2b85-43dc-afa3-7a7b4be75141/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 05:21:51,130 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_69af3446-2b85-43dc-afa3-7a7b4be75141/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 05:21:51,133 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_69af3446-2b85-43dc-afa3-7a7b4be75141/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2024-11-28 05:21:51,231 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 05:21:51,233 INFO L256 TraceCheckSpWp]: Trace formula consists of 199 conjuncts, 6 conjuncts are in the unsatisfiable core [2024-11-28 05:21:51,235 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 05:21:51,278 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-28 05:21:51,278 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-28 05:21:51,321 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-28 05:21:51,321 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1708175784] provided 1 perfect and 1 imperfect interpolant sequences [2024-11-28 05:21:51,321 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2024-11-28 05:21:51,321 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [6, 4] total 10 [2024-11-28 05:21:51,321 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1781983354] [2024-11-28 05:21:51,322 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-28 05:21:51,322 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-11-28 05:21:51,322 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 05:21:51,322 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-11-28 05:21:51,323 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=73, Unknown=0, NotChecked=0, Total=110 [2024-11-28 05:21:51,339 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 19 out of 58 [2024-11-28 05:21:51,340 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 93 places, 72 transitions, 442 flow. Second operand has 5 states, 5 states have (on average 23.4) internal successors, (117), 5 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 05:21:51,340 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-28 05:21:51,340 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 19 of 58 [2024-11-28 05:21:51,340 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-28 05:21:52,677 INFO L124 PetriNetUnfolderBase]: 9661/14015 cut-off events. [2024-11-28 05:21:52,677 INFO L125 PetriNetUnfolderBase]: For 39072/40128 co-relation queries the response was YES. [2024-11-28 05:21:52,730 INFO L83 FinitePrefix]: Finished finitePrefix Result has 48578 conditions, 14015 events. 9661/14015 cut-off events. For 39072/40128 co-relation queries the response was YES. Maximal size of possible extension queue 381. Compared 79981 event pairs, 1977 based on Foata normal form. 252/14018 useless extension candidates. Maximal degree in co-relation 34106. Up to 8976 conditions per place. [2024-11-28 05:21:52,770 INFO L140 encePairwiseOnDemand]: 52/58 looper letters, 82 selfloop transitions, 10 changer transitions 0/100 dead transitions. [2024-11-28 05:21:52,770 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 97 places, 100 transitions, 828 flow [2024-11-28 05:21:52,770 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-11-28 05:21:52,770 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-11-28 05:21:52,771 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 144 transitions. [2024-11-28 05:21:52,771 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.496551724137931 [2024-11-28 05:21:52,771 INFO L175 Difference]: Start difference. First operand has 93 places, 72 transitions, 442 flow. Second operand 5 states and 144 transitions. [2024-11-28 05:21:52,771 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 97 places, 100 transitions, 828 flow [2024-11-28 05:21:52,817 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 89 places, 100 transitions, 707 flow, removed 11 selfloop flow, removed 8 redundant places. [2024-11-28 05:21:52,819 INFO L231 Difference]: Finished difference. Result has 90 places, 71 transitions, 398 flow [2024-11-28 05:21:52,819 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=58, PETRI_DIFFERENCE_MINUEND_FLOW=359, PETRI_DIFFERENCE_MINUEND_PLACES=85, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=70, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=9, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=60, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=398, PETRI_PLACES=90, PETRI_TRANSITIONS=71} [2024-11-28 05:21:52,819 INFO L279 CegarLoopForPetriNet]: 58 programPoint places, 32 predicate places. [2024-11-28 05:21:52,819 INFO L471 AbstractCegarLoop]: Abstraction has has 90 places, 71 transitions, 398 flow [2024-11-28 05:21:52,820 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 23.4) internal successors, (117), 5 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 05:21:52,820 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-28 05:21:52,820 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, 1, 1, 1, 1] [2024-11-28 05:21:52,828 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_69af3446-2b85-43dc-afa3-7a7b4be75141/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Ended with exit code 0 [2024-11-28 05:21:53,024 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_69af3446-2b85-43dc-afa3-7a7b4be75141/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2024-11-28 05:21:53,024 INFO L396 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 32 more)] === [2024-11-28 05:21:53,024 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 05:21:53,024 INFO L85 PathProgramCache]: Analyzing trace with hash 144331015, now seen corresponding path program 1 times [2024-11-28 05:21:53,024 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 05:21:53,024 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1929067430] [2024-11-28 05:21:53,025 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-28 05:21:53,025 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 05:21:53,044 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 05:21:53,719 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-28 05:21:53,719 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 05:21:53,719 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1929067430] [2024-11-28 05:21:53,719 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1929067430] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-28 05:21:53,719 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [272367465] [2024-11-28 05:21:53,719 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-28 05:21:53,719 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 05:21:53,720 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_69af3446-2b85-43dc-afa3-7a7b4be75141/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 05:21:53,722 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_69af3446-2b85-43dc-afa3-7a7b4be75141/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 05:21:53,725 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_69af3446-2b85-43dc-afa3-7a7b4be75141/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2024-11-28 05:21:53,826 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 05:21:53,828 INFO L256 TraceCheckSpWp]: Trace formula consists of 221 conjuncts, 42 conjuncts are in the unsatisfiable core [2024-11-28 05:21:53,831 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 05:21:53,903 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2024-11-28 05:21:54,366 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 9 [2024-11-28 05:21:54,455 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-28 05:21:54,455 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-28 05:21:54,610 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 79 treesize of output 77 [2024-11-28 05:21:54,618 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 77 treesize of output 75 [2024-11-28 05:21:55,895 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 169 treesize of output 157 [2024-11-28 05:21:55,945 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-28 05:21:55,945 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 202 treesize of output 218 [2024-11-28 05:22:03,103 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-28 05:22:03,104 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [272367465] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-28 05:22:03,104 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-28 05:22:03,104 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 28 [2024-11-28 05:22:03,104 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [317735827] [2024-11-28 05:22:03,104 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-28 05:22:03,106 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2024-11-28 05:22:03,107 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 05:22:03,107 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2024-11-28 05:22:03,107 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=728, Unknown=0, NotChecked=0, Total=812 [2024-11-28 05:22:05,844 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 19 out of 58 [2024-11-28 05:22:05,845 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 90 places, 71 transitions, 398 flow. Second operand has 29 states, 29 states have (on average 21.586206896551722) internal successors, (626), 29 states have internal predecessors, (626), 0 states have call successors, (0), 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 05:22:05,845 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-28 05:22:05,845 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 19 of 58 [2024-11-28 05:22:05,845 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-28 05:22:09,652 INFO L124 PetriNetUnfolderBase]: 13257/19055 cut-off events. [2024-11-28 05:22:09,652 INFO L125 PetriNetUnfolderBase]: For 44909/45899 co-relation queries the response was YES. [2024-11-28 05:22:09,706 INFO L83 FinitePrefix]: Finished finitePrefix Result has 60779 conditions, 19055 events. 13257/19055 cut-off events. For 44909/45899 co-relation queries the response was YES. Maximal size of possible extension queue 480. Compared 107244 event pairs, 1901 based on Foata normal form. 1/18346 useless extension candidates. Maximal degree in co-relation 43023. Up to 12232 conditions per place. [2024-11-28 05:22:09,753 INFO L140 encePairwiseOnDemand]: 43/58 looper letters, 169 selfloop transitions, 43 changer transitions 28/251 dead transitions. [2024-11-28 05:22:09,753 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 110 places, 251 transitions, 1860 flow [2024-11-28 05:22:09,754 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2024-11-28 05:22:09,754 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2024-11-28 05:22:09,755 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 594 transitions. [2024-11-28 05:22:09,756 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.4876847290640394 [2024-11-28 05:22:09,756 INFO L175 Difference]: Start difference. First operand has 90 places, 71 transitions, 398 flow. Second operand 21 states and 594 transitions. [2024-11-28 05:22:09,756 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 110 places, 251 transitions, 1860 flow [2024-11-28 05:22:09,871 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 107 places, 251 transitions, 1830 flow, removed 3 selfloop flow, removed 3 redundant places. [2024-11-28 05:22:09,873 INFO L231 Difference]: Finished difference. Result has 117 places, 106 transitions, 749 flow [2024-11-28 05:22:09,873 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=58, PETRI_DIFFERENCE_MINUEND_FLOW=381, PETRI_DIFFERENCE_MINUEND_PLACES=87, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=71, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=14, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=47, PETRI_DIFFERENCE_SUBTRAHEND_STATES=21, PETRI_FLOW=749, PETRI_PLACES=117, PETRI_TRANSITIONS=106} [2024-11-28 05:22:09,874 INFO L279 CegarLoopForPetriNet]: 58 programPoint places, 59 predicate places. [2024-11-28 05:22:09,874 INFO L471 AbstractCegarLoop]: Abstraction has has 117 places, 106 transitions, 749 flow [2024-11-28 05:22:09,874 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 21.586206896551722) internal successors, (626), 29 states have internal predecessors, (626), 0 states have call successors, (0), 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 05:22:09,874 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-28 05:22:09,874 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, 1, 1, 1, 1] [2024-11-28 05:22:09,882 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_69af3446-2b85-43dc-afa3-7a7b4be75141/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Ended with exit code 0 [2024-11-28 05:22:10,075 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_69af3446-2b85-43dc-afa3-7a7b4be75141/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2024-11-28 05:22:10,075 INFO L396 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 32 more)] === [2024-11-28 05:22:10,075 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 05:22:10,075 INFO L85 PathProgramCache]: Analyzing trace with hash 2126633507, now seen corresponding path program 2 times [2024-11-28 05:22:10,076 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 05:22:10,076 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1606155731] [2024-11-28 05:22:10,076 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-28 05:22:10,076 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 05:22:10,106 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-28 05:22:10,107 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 05:22:11,199 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-28 05:22:11,199 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 05:22:11,200 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1606155731] [2024-11-28 05:22:11,200 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1606155731] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-28 05:22:11,200 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [82240636] [2024-11-28 05:22:11,200 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-28 05:22:11,200 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 05:22:11,200 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_69af3446-2b85-43dc-afa3-7a7b4be75141/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 05:22:11,202 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_69af3446-2b85-43dc-afa3-7a7b4be75141/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 05:22:11,205 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_69af3446-2b85-43dc-afa3-7a7b4be75141/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2024-11-28 05:22:11,312 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-28 05:22:11,312 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 05:22:11,314 INFO L256 TraceCheckSpWp]: Trace formula consists of 221 conjuncts, 39 conjuncts are in the unsatisfiable core [2024-11-28 05:22:11,316 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 05:22:11,395 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2024-11-28 05:22:11,886 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 67 treesize of output 47 [2024-11-28 05:22:11,890 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 38 treesize of output 36 [2024-11-28 05:22:11,895 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 36 treesize of output 34 [2024-11-28 05:22:11,960 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-28 05:22:11,960 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-28 05:22:12,050 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 79 treesize of output 77 [2024-11-28 05:22:12,056 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 77 treesize of output 75 [2024-11-28 05:22:13,301 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 183 treesize of output 169 [2024-11-28 05:22:13,355 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-28 05:22:13,356 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 222 treesize of output 232 [2024-11-28 05:22:27,190 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-28 05:22:27,190 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [82240636] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-28 05:22:27,190 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-28 05:22:27,190 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 10, 10] total 30 [2024-11-28 05:22:27,190 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1335980141] [2024-11-28 05:22:27,190 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-28 05:22:27,191 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2024-11-28 05:22:27,191 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 05:22:27,191 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2024-11-28 05:22:27,192 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=104, Invalid=826, Unknown=0, NotChecked=0, Total=930 [2024-11-28 05:22:29,508 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 19 out of 58 [2024-11-28 05:22:29,510 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 117 places, 106 transitions, 749 flow. Second operand has 31 states, 31 states have (on average 21.419354838709676) internal successors, (664), 31 states have internal predecessors, (664), 0 states have call successors, (0), 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 05:22:29,510 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-28 05:22:29,510 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 19 of 58 [2024-11-28 05:22:29,510 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-28 05:22:38,824 INFO L124 PetriNetUnfolderBase]: 16990/25128 cut-off events. [2024-11-28 05:22:38,825 INFO L125 PetriNetUnfolderBase]: For 74156/75435 co-relation queries the response was YES. [2024-11-28 05:22:38,937 INFO L83 FinitePrefix]: Finished finitePrefix Result has 90462 conditions, 25128 events. 16990/25128 cut-off events. For 74156/75435 co-relation queries the response was YES. Maximal size of possible extension queue 650. Compared 155652 event pairs, 1567 based on Foata normal form. 69/25194 useless extension candidates. Maximal degree in co-relation 90416. Up to 16131 conditions per place. [2024-11-28 05:22:39,004 INFO L140 encePairwiseOnDemand]: 39/58 looper letters, 289 selfloop transitions, 268 changer transitions 29/597 dead transitions. [2024-11-28 05:22:39,004 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 175 places, 597 transitions, 5089 flow [2024-11-28 05:22:39,005 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 62 states. [2024-11-28 05:22:39,005 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 62 states. [2024-11-28 05:22:39,008 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 1636 transitions. [2024-11-28 05:22:39,009 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.4549499443826474 [2024-11-28 05:22:39,009 INFO L175 Difference]: Start difference. First operand has 117 places, 106 transitions, 749 flow. Second operand 62 states and 1636 transitions. [2024-11-28 05:22:39,009 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 175 places, 597 transitions, 5089 flow [2024-11-28 05:22:39,232 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 170 places, 597 transitions, 5044 flow, removed 18 selfloop flow, removed 5 redundant places. [2024-11-28 05:22:39,239 INFO L231 Difference]: Finished difference. Result has 208 places, 350 transitions, 3856 flow [2024-11-28 05:22:39,240 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=58, PETRI_DIFFERENCE_MINUEND_FLOW=732, PETRI_DIFFERENCE_MINUEND_PLACES=109, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=106, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=48, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=34, PETRI_DIFFERENCE_SUBTRAHEND_STATES=62, PETRI_FLOW=3856, PETRI_PLACES=208, PETRI_TRANSITIONS=350} [2024-11-28 05:22:39,240 INFO L279 CegarLoopForPetriNet]: 58 programPoint places, 150 predicate places. [2024-11-28 05:22:39,240 INFO L471 AbstractCegarLoop]: Abstraction has has 208 places, 350 transitions, 3856 flow [2024-11-28 05:22:39,241 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 31 states have (on average 21.419354838709676) internal successors, (664), 31 states have internal predecessors, (664), 0 states have call successors, (0), 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 05:22:39,241 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-28 05:22:39,241 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, 1, 1, 1, 1] [2024-11-28 05:22:39,249 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_69af3446-2b85-43dc-afa3-7a7b4be75141/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Ended with exit code 0 [2024-11-28 05:22:39,444 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_69af3446-2b85-43dc-afa3-7a7b4be75141/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2024-11-28 05:22:39,444 INFO L396 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 32 more)] === [2024-11-28 05:22:39,445 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 05:22:39,445 INFO L85 PathProgramCache]: Analyzing trace with hash 1673782239, now seen corresponding path program 3 times [2024-11-28 05:22:39,445 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 05:22:39,445 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [302375513] [2024-11-28 05:22:39,445 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-28 05:22:39,446 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 05:22:39,480 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2024-11-28 05:22:39,480 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 05:22:40,182 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-11-28 05:22:40,182 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 05:22:40,182 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [302375513] [2024-11-28 05:22:40,182 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [302375513] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-28 05:22:40,182 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [407724350] [2024-11-28 05:22:40,182 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-28 05:22:40,183 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 05:22:40,183 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_69af3446-2b85-43dc-afa3-7a7b4be75141/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 05:22:40,185 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_69af3446-2b85-43dc-afa3-7a7b4be75141/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 05:22:40,188 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_69af3446-2b85-43dc-afa3-7a7b4be75141/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2024-11-28 05:22:40,282 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2024-11-28 05:22:40,282 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 05:22:40,284 INFO L256 TraceCheckSpWp]: Trace formula consists of 221 conjuncts, 39 conjuncts are in the unsatisfiable core [2024-11-28 05:22:40,286 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 05:22:40,355 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2024-11-28 05:22:40,767 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 50 treesize of output 48 [2024-11-28 05:22:40,771 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 65 treesize of output 45 [2024-11-28 05:22:40,777 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 36 treesize of output 34 [2024-11-28 05:22:40,896 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-28 05:22:40,896 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-28 05:22:41,074 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 79 treesize of output 77 [2024-11-28 05:22:41,080 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 77 treesize of output 75 [2024-11-28 05:22:41,944 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 183 treesize of output 169 [2024-11-28 05:22:41,982 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-28 05:22:41,983 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 222 treesize of output 232 [2024-11-28 05:22:58,594 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-28 05:22:58,594 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [407724350] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-28 05:22:58,594 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-28 05:22:58,594 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10, 10] total 29 [2024-11-28 05:22:58,594 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1929835525] [2024-11-28 05:22:58,594 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-28 05:22:58,595 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2024-11-28 05:22:58,595 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 05:22:58,595 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2024-11-28 05:22:58,595 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=86, Invalid=784, Unknown=0, NotChecked=0, Total=870 [2024-11-28 05:23:00,984 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 19 out of 58 [2024-11-28 05:23:00,985 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 208 places, 350 transitions, 3856 flow. Second operand has 30 states, 30 states have (on average 21.5) internal successors, (645), 30 states have internal predecessors, (645), 0 states have call successors, (0), 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 05:23:00,985 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-28 05:23:00,985 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 19 of 58 [2024-11-28 05:23:00,985 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-28 05:23:11,397 INFO L124 PetriNetUnfolderBase]: 21167/31533 cut-off events. [2024-11-28 05:23:11,397 INFO L125 PetriNetUnfolderBase]: For 200146/201669 co-relation queries the response was YES. [2024-11-28 05:23:11,692 INFO L83 FinitePrefix]: Finished finitePrefix Result has 148986 conditions, 31533 events. 21167/31533 cut-off events. For 200146/201669 co-relation queries the response was YES. Maximal size of possible extension queue 854. Compared 205311 event pairs, 1710 based on Foata normal form. 15/31525 useless extension candidates. Maximal degree in co-relation 148597. Up to 16352 conditions per place. [2024-11-28 05:23:11,826 INFO L140 encePairwiseOnDemand]: 41/58 looper letters, 452 selfloop transitions, 345 changer transitions 48/856 dead transitions. [2024-11-28 05:23:11,826 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 253 places, 856 transitions, 10067 flow [2024-11-28 05:23:11,826 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2024-11-28 05:23:11,826 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 49 states. [2024-11-28 05:23:11,829 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 1352 transitions. [2024-11-28 05:23:11,830 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.4757213230119634 [2024-11-28 05:23:11,830 INFO L175 Difference]: Start difference. First operand has 208 places, 350 transitions, 3856 flow. Second operand 49 states and 1352 transitions. [2024-11-28 05:23:11,830 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 253 places, 856 transitions, 10067 flow [2024-11-28 05:23:13,819 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 247 places, 856 transitions, 9716 flow, removed 164 selfloop flow, removed 6 redundant places. [2024-11-28 05:23:13,829 INFO L231 Difference]: Finished difference. Result has 273 places, 528 transitions, 6879 flow [2024-11-28 05:23:13,830 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=58, PETRI_DIFFERENCE_MINUEND_FLOW=3629, PETRI_DIFFERENCE_MINUEND_PLACES=199, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=350, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=170, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=153, PETRI_DIFFERENCE_SUBTRAHEND_STATES=49, PETRI_FLOW=6879, PETRI_PLACES=273, PETRI_TRANSITIONS=528} [2024-11-28 05:23:13,830 INFO L279 CegarLoopForPetriNet]: 58 programPoint places, 215 predicate places. [2024-11-28 05:23:13,830 INFO L471 AbstractCegarLoop]: Abstraction has has 273 places, 528 transitions, 6879 flow [2024-11-28 05:23:13,831 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 21.5) internal successors, (645), 30 states have internal predecessors, (645), 0 states have call successors, (0), 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 05:23:13,831 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-28 05:23:13,831 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, 1, 1, 1, 1] [2024-11-28 05:23:13,844 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_69af3446-2b85-43dc-afa3-7a7b4be75141/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Ended with exit code 0 [2024-11-28 05:23:14,031 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_69af3446-2b85-43dc-afa3-7a7b4be75141/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 05:23:14,032 INFO L396 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 32 more)] === [2024-11-28 05:23:14,032 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 05:23:14,032 INFO L85 PathProgramCache]: Analyzing trace with hash -984676377, now seen corresponding path program 4 times [2024-11-28 05:23:14,032 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 05:23:14,032 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2144014206] [2024-11-28 05:23:14,032 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-11-28 05:23:14,032 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 05:23:14,061 INFO L229 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-11-28 05:23:14,061 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 05:23:14,738 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-11-28 05:23:14,738 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 05:23:14,738 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2144014206] [2024-11-28 05:23:14,739 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2144014206] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-28 05:23:14,739 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-28 05:23:14,739 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2024-11-28 05:23:14,739 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1909026852] [2024-11-28 05:23:14,739 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-28 05:23:14,739 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-11-28 05:23:14,740 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 05:23:14,740 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-11-28 05:23:14,740 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=109, Unknown=0, NotChecked=0, Total=132 [2024-11-28 05:23:15,252 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 18 out of 58 [2024-11-28 05:23:15,253 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 273 places, 528 transitions, 6879 flow. Second operand has 12 states, 12 states have (on average 20.083333333333332) internal successors, (241), 12 states have internal predecessors, (241), 0 states have call successors, (0), 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 05:23:15,253 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-28 05:23:15,253 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 18 of 58 [2024-11-28 05:23:15,253 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-28 05:23:24,430 INFO L124 PetriNetUnfolderBase]: 24766/36572 cut-off events. [2024-11-28 05:23:24,430 INFO L125 PetriNetUnfolderBase]: For 309532/310338 co-relation queries the response was YES. [2024-11-28 05:23:24,899 INFO L83 FinitePrefix]: Finished finitePrefix Result has 188719 conditions, 36572 events. 24766/36572 cut-off events. For 309532/310338 co-relation queries the response was YES. Maximal size of possible extension queue 914. Compared 234276 event pairs, 4014 based on Foata normal form. 25/35922 useless extension candidates. Maximal degree in co-relation 188604. Up to 31064 conditions per place. [2024-11-28 05:23:25,045 INFO L140 encePairwiseOnDemand]: 46/58 looper letters, 415 selfloop transitions, 252 changer transitions 10/685 dead transitions. [2024-11-28 05:23:25,046 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 273 places, 685 transitions, 10028 flow [2024-11-28 05:23:25,046 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-11-28 05:23:25,046 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-11-28 05:23:25,047 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 335 transitions. [2024-11-28 05:23:25,047 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.4813218390804598 [2024-11-28 05:23:25,047 INFO L175 Difference]: Start difference. First operand has 273 places, 528 transitions, 6879 flow. Second operand 12 states and 335 transitions. [2024-11-28 05:23:25,047 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 273 places, 685 transitions, 10028 flow [2024-11-28 05:23:28,370 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 259 places, 685 transitions, 9542 flow, removed 168 selfloop flow, removed 14 redundant places. [2024-11-28 05:23:28,378 INFO L231 Difference]: Finished difference. Result has 265 places, 599 transitions, 8224 flow [2024-11-28 05:23:28,379 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=58, PETRI_DIFFERENCE_MINUEND_FLOW=6562, PETRI_DIFFERENCE_MINUEND_PLACES=248, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=528, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=181, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=327, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=8224, PETRI_PLACES=265, PETRI_TRANSITIONS=599} [2024-11-28 05:23:28,379 INFO L279 CegarLoopForPetriNet]: 58 programPoint places, 207 predicate places. [2024-11-28 05:23:28,379 INFO L471 AbstractCegarLoop]: Abstraction has has 265 places, 599 transitions, 8224 flow [2024-11-28 05:23:28,379 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 20.083333333333332) internal successors, (241), 12 states have internal predecessors, (241), 0 states have call successors, (0), 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 05:23:28,379 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-28 05:23:28,379 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, 1, 1, 1, 1] [2024-11-28 05:23:28,380 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2024-11-28 05:23:28,380 INFO L396 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 32 more)] === [2024-11-28 05:23:28,380 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 05:23:28,380 INFO L85 PathProgramCache]: Analyzing trace with hash -924947813, now seen corresponding path program 5 times [2024-11-28 05:23:28,380 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 05:23:28,380 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1496529347] [2024-11-28 05:23:28,380 INFO L95 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-11-28 05:23:28,380 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 05:23:28,399 INFO L229 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-28 05:23:28,399 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 05:23:29,062 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-28 05:23:29,062 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 05:23:29,062 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1496529347] [2024-11-28 05:23:29,062 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1496529347] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-28 05:23:29,062 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [123854102] [2024-11-28 05:23:29,062 INFO L95 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-11-28 05:23:29,063 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 05:23:29,063 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_69af3446-2b85-43dc-afa3-7a7b4be75141/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 05:23:29,065 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_69af3446-2b85-43dc-afa3-7a7b4be75141/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 05:23:29,068 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_69af3446-2b85-43dc-afa3-7a7b4be75141/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2024-11-28 05:23:29,177 INFO L229 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-28 05:23:29,177 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 05:23:29,179 INFO L256 TraceCheckSpWp]: Trace formula consists of 221 conjuncts, 42 conjuncts are in the unsatisfiable core [2024-11-28 05:23:29,184 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 05:23:29,264 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2024-11-28 05:23:29,642 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 9 [2024-11-28 05:23:29,785 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-28 05:23:29,785 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-28 05:23:30,009 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 79 treesize of output 77 [2024-11-28 05:23:30,017 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 77 treesize of output 75 [2024-11-28 05:23:31,154 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 169 treesize of output 157 [2024-11-28 05:23:31,202 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-28 05:23:31,203 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 202 treesize of output 218 [2024-11-28 05:23:39,254 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-28 05:23:39,255 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [123854102] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-28 05:23:39,255 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-28 05:23:39,255 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 28 [2024-11-28 05:23:39,255 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1231500824] [2024-11-28 05:23:39,255 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-28 05:23:39,255 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2024-11-28 05:23:39,255 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 05:23:39,256 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2024-11-28 05:23:39,256 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=732, Unknown=0, NotChecked=0, Total=812 [2024-11-28 05:23:41,542 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 19 out of 58 [2024-11-28 05:23:41,543 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 265 places, 599 transitions, 8224 flow. Second operand has 29 states, 29 states have (on average 21.586206896551722) internal successors, (626), 29 states have internal predecessors, (626), 0 states have call successors, (0), 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 05:23:41,543 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-28 05:23:41,543 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 19 of 58 [2024-11-28 05:23:41,543 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-28 05:23:52,180 INFO L124 PetriNetUnfolderBase]: 22009/32946 cut-off events. [2024-11-28 05:23:52,180 INFO L125 PetriNetUnfolderBase]: For 284443/285995 co-relation queries the response was YES. [2024-11-28 05:23:52,597 INFO L83 FinitePrefix]: Finished finitePrefix Result has 170166 conditions, 32946 events. 22009/32946 cut-off events. For 284443/285995 co-relation queries the response was YES. Maximal size of possible extension queue 876. Compared 217533 event pairs, 2000 based on Foata normal form. 25/32944 useless extension candidates. Maximal degree in co-relation 169762. Up to 19057 conditions per place. [2024-11-28 05:23:52,709 INFO L140 encePairwiseOnDemand]: 41/58 looper letters, 396 selfloop transitions, 417 changer transitions 35/859 dead transitions. [2024-11-28 05:23:52,709 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 290 places, 859 transitions, 12933 flow [2024-11-28 05:23:52,710 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2024-11-28 05:23:52,710 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2024-11-28 05:23:52,711 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 739 transitions. [2024-11-28 05:23:52,712 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.490053050397878 [2024-11-28 05:23:52,712 INFO L175 Difference]: Start difference. First operand has 265 places, 599 transitions, 8224 flow. Second operand 26 states and 739 transitions. [2024-11-28 05:23:52,712 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 290 places, 859 transitions, 12933 flow [2024-11-28 05:23:55,659 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 287 places, 859 transitions, 12512 flow, removed 21 selfloop flow, removed 3 redundant places. [2024-11-28 05:23:55,668 INFO L231 Difference]: Finished difference. Result has 296 places, 682 transitions, 10488 flow [2024-11-28 05:23:55,669 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=58, PETRI_DIFFERENCE_MINUEND_FLOW=7897, PETRI_DIFFERENCE_MINUEND_PLACES=262, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=599, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=336, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=240, PETRI_DIFFERENCE_SUBTRAHEND_STATES=26, PETRI_FLOW=10488, PETRI_PLACES=296, PETRI_TRANSITIONS=682} [2024-11-28 05:23:55,669 INFO L279 CegarLoopForPetriNet]: 58 programPoint places, 238 predicate places. [2024-11-28 05:23:55,669 INFO L471 AbstractCegarLoop]: Abstraction has has 296 places, 682 transitions, 10488 flow [2024-11-28 05:23:55,670 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 21.586206896551722) internal successors, (626), 29 states have internal predecessors, (626), 0 states have call successors, (0), 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 05:23:55,670 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-28 05:23:55,670 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, 1, 1, 1, 1] [2024-11-28 05:23:55,675 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_69af3446-2b85-43dc-afa3-7a7b4be75141/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2024-11-28 05:23:55,870 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_69af3446-2b85-43dc-afa3-7a7b4be75141/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 05:23:55,870 INFO L396 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 32 more)] === [2024-11-28 05:23:55,871 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 05:23:55,871 INFO L85 PathProgramCache]: Analyzing trace with hash -1955576555, now seen corresponding path program 6 times [2024-11-28 05:23:55,871 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 05:23:55,871 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1801244752] [2024-11-28 05:23:55,871 INFO L95 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2024-11-28 05:23:55,871 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 05:23:55,903 INFO L229 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2024-11-28 05:23:55,904 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 05:23:56,557 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-11-28 05:23:56,558 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 05:23:56,558 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1801244752] [2024-11-28 05:23:56,558 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1801244752] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-28 05:23:56,558 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1607156984] [2024-11-28 05:23:56,558 INFO L95 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2024-11-28 05:23:56,559 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 05:23:56,559 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_69af3446-2b85-43dc-afa3-7a7b4be75141/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 05:23:56,561 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_69af3446-2b85-43dc-afa3-7a7b4be75141/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 05:23:56,565 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_69af3446-2b85-43dc-afa3-7a7b4be75141/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2024-11-28 05:23:56,668 INFO L229 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2024-11-28 05:23:56,668 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 05:23:56,670 INFO L256 TraceCheckSpWp]: Trace formula consists of 221 conjuncts, 39 conjuncts are in the unsatisfiable core [2024-11-28 05:23:56,674 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 05:23:56,759 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2024-11-28 05:23:57,273 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 67 treesize of output 47 [2024-11-28 05:23:57,279 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 38 treesize of output 36 [2024-11-28 05:23:57,284 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 36 treesize of output 34 [2024-11-28 05:23:57,420 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-28 05:23:57,420 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-28 05:23:57,594 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 79 treesize of output 77 [2024-11-28 05:23:57,601 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 77 treesize of output 75 [2024-11-28 05:23:58,506 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 169 treesize of output 157 [2024-11-28 05:23:58,545 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-28 05:23:58,545 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 202 treesize of output 218 [2024-11-28 05:24:05,361 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-28 05:24:05,362 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1607156984] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-28 05:24:05,362 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-28 05:24:05,362 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10, 10] total 29 [2024-11-28 05:24:05,362 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [405310019] [2024-11-28 05:24:05,362 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-28 05:24:05,362 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2024-11-28 05:24:05,363 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 05:24:05,363 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2024-11-28 05:24:05,363 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=786, Unknown=0, NotChecked=0, Total=870 [2024-11-28 05:24:07,393 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 19 out of 58 [2024-11-28 05:24:07,394 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 296 places, 682 transitions, 10488 flow. Second operand has 30 states, 30 states have (on average 21.5) internal successors, (645), 30 states have internal predecessors, (645), 0 states have call successors, (0), 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 05:24:07,394 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-28 05:24:07,394 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 19 of 58 [2024-11-28 05:24:07,394 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand